Infineon XDPP1100 User manual

User Manual Please read the Important Notice and Warnings at the end of this document V 1.0
www.infineon.com/xdpp1100 page 1 of 61 2021-06-18
UM_2106_PL88_2107_203235
XDPP1100 PMBus command set
About this document
Scope and purpose
This document describes all the PMBus commands supported by the XDPP1100 digital power supply
controller.
Intended audience
The user manual is intended for XDPP1100 users.
Table of contents
About this document....................................................................................................................... 1
Table of contents............................................................................................................................ 1
1PMBus commands –standard .................................................................................................. 5
1.1 00h –PAGE...............................................................................................................................................5
1.2 01h –OPERATION....................................................................................................................................5
1.3 02h –ON_OFF_CONFIG ...........................................................................................................................5
1.4 03h –CLEAR_FAULTS ..............................................................................................................................6
1.5 10h –WRITE_PROTECT ...........................................................................................................................6
1.6 11h –STORE_DEFAULT_ALL ...................................................................................................................7
1.7 12h –RESTORE_DEFAULT_ALL...............................................................................................................7
1.8 15h –STORE_USER_ALL..........................................................................................................................7
1.9 16h –RESTORE_USER_ALL .....................................................................................................................7
1.10 17h –STORE_USER_CODE......................................................................................................................8
1.11 18h –RESTORE_USER_CODE..................................................................................................................8
1.12 19h –CAPABILITY.....................................................................................................................................8
1.13 1Bh –SMBALERT_MASK..........................................................................................................................8
1.14 20h –VOUT_MODE ..................................................................................................................................9
1.15 21h –VOUT_COMMAND...........................................................................................................................9
1.16 22h –VOUT_TRIM ..................................................................................................................................10
1.17 23h –VOUT_CAL_OFFSET .....................................................................................................................10
1.18 24h –VOUT_MAX ...................................................................................................................................10
1.19 25h –VOUT_MARGIN_HIGH ..................................................................................................................11
1.20 26h –VOUT_MARGIN_LOW ...................................................................................................................11
1.21 27h –VOUT_TRANSITION_RATE ...........................................................................................................11
1.22 28h –VOUT_DROOP ..............................................................................................................................11
1.23 29h –VOUT_SCALE_LOOP ....................................................................................................................12
1.24 2Bh –VOUT_MIN....................................................................................................................................12
1.25 32h –MAX_DUTY....................................................................................................................................12
1.26 33h –FREQUENCY_SWITCH ..................................................................................................................12
1.27 34h –POWER_MODE .............................................................................................................................12
1.28 35h –VIN_ON.........................................................................................................................................13
1.29 36h –VIN_OFF........................................................................................................................................13
1.30 37h –INTERLEAVE .................................................................................................................................13
1.31 39h –IOUT_CAL_OFFSET ......................................................................................................................14

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XDPP1100 PMBus command set
PMBus commands –standard
1.32 40h –VOUT_OV_FAULT_LIMIT..............................................................................................................14
1.33 41h –VOUT_OV_FAULT_RESPONSE.....................................................................................................14
1.34 42h –VOUT_OV_WARN_LIMIT...............................................................................................................15
1.35 43h –VOUT_UV_WARN_LIMIT...............................................................................................................15
1.36 44h –VOUT_UV_FAULT_LIMIT..............................................................................................................15
1.37 45h –VOUT_UV_FAULT_RESPONSE.....................................................................................................15
1.38 46h –IOUT_OC_FAULT_LIMIT...............................................................................................................16
1.39 47h –IOUT_OC_FAULT_RESPONSE......................................................................................................16
1.40 48h –IOUT_OC_LV_FAULT_LIMIT.........................................................................................................17
1.41 4Ah –IOUT_OC_WARN_LIMIT ...............................................................................................................17
1.42 4Bh –IOUT_UC_FAULT_LIMIT ..............................................................................................................17
1.43 4Ch –IOUT_UC_FAULT_RESPONSE .....................................................................................................17
1.44 4Fh –OT_FAULT_LIMIT .........................................................................................................................18
1.45 50h –OT_FAULT_RESPONSE ................................................................................................................18
1.46 51h –OT_WARN_LIMIT..........................................................................................................................19
1.47 52h –UT_WARN_LIMIT..........................................................................................................................19
1.48 53h –UT_FAULT_LIMIT .........................................................................................................................19
1.49 54h –UT_FAULT_RESPONSE ................................................................................................................19
1.50 55h –VIN_OV_FAULT_LIMIT..................................................................................................................20
1.51 56h –VIN_OV_FAULT_RESPONSE.........................................................................................................20
1.52 57h –VIN_OV_WARN_LIMIT ..................................................................................................................20
1.53 58h –VIN_UV_WARN_LIMIT ..................................................................................................................21
1.54 59h –VIN_UV_FAULT_LIMIT..................................................................................................................21
1.55 5Ah –VIN_UV_FAULT_RESPONSE ........................................................................................................21
1.56 5Bh –IIN_OC_FAULT_LIMIT ..................................................................................................................22
1.57 5Ch –IIN_OC_FAULT_RESPONSE.........................................................................................................22
1.58 5Dh –IIN_OC_WARN_LIMIT...................................................................................................................22
1.59 5Eh –POWER_GOOD_ON......................................................................................................................23
1.60 5Fh –POWER_GOOD_OFF.....................................................................................................................23
1.61 60h –TON_DELAY..................................................................................................................................23
1.62 61h –TON_RISE.....................................................................................................................................23
1.63 62h –TON_MAX_FAULT_LIMIT..............................................................................................................24
1.64 63h –TON_MAX_FAULT_RESPONSE ....................................................................................................24
1.65 64h –TOFF_DELAY.................................................................................................................................24
1.66 65h –TOFF_FALL ...................................................................................................................................25
1.67 66h –TOFF_MAX_WARN_LIMIT.............................................................................................................25
1.68 6Ah –POUT_OP_WARN_LIMIT..............................................................................................................25
1.69 6Bh –PIN_OP_WARN_LIMIT..................................................................................................................25
1.70 78h –STATUS_BYTE ..............................................................................................................................25
1.71 79h –STATUS_WORD ............................................................................................................................26
1.72 7Ah –STATUS_VOUT.............................................................................................................................27
1.73 7Bh –STATUS_IOUT..............................................................................................................................27
1.74 7Ch –STATUS_INPUT............................................................................................................................28
1.75 7Dh –STATUS_TEMPERATURE .............................................................................................................28
1.76 7Eh –STATUS_CML ...............................................................................................................................28
1.77 7Fh –STATUS_OTHER...........................................................................................................................29
1.78 80h –STATUS_MFR_SPECIFIC ..............................................................................................................29
1.79 88h –READ_VIN .....................................................................................................................................30
1.80 89h –READ_IIN ......................................................................................................................................30
1.81 8Bh –READ_VOUT .................................................................................................................................30
1.82 8Ch –READ_IOUT ..................................................................................................................................31

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XDPP1100 PMBus command set
PMBus commands –standard
1.83 8Dh –READ_TEMPERATURE_1 .............................................................................................................31
1.84 8Eh –READ_TEMPERATURE_2..............................................................................................................31
1.85 90h –READ_FAN_SPEED_1 ...................................................................................................................31
1.86 91h –READ_FAN_SPEED_2 ...................................................................................................................32
1.87 94h –READ_DUTY_CYCLE .....................................................................................................................32
1.88 95h –READ_FREQUENCY.......................................................................................................................32
1.89 96h –READ_POUT .................................................................................................................................32
1.90 97h –READ_PIN.....................................................................................................................................32
1.91 98h –PMBUS_REVISION........................................................................................................................33
1.92 99h –MFR_ID .........................................................................................................................................33
1.93 9Ah –MFR_MODEL.................................................................................................................................33
1.94 9Bh –MFR_REVISION.............................................................................................................................34
1.95 9Ch –MFR_LOCATION...........................................................................................................................34
1.96 9Dh –MFR_DATE ...................................................................................................................................34
1.97 9Eh –MFR_SERIAL.................................................................................................................................34
1.98 A0h –MFR_VIN_MIN ..............................................................................................................................34
1.99 A1h –MFR_VIN_MAX..............................................................................................................................35
1.100 A2h –MFR_IIN_MAX...............................................................................................................................35
1.101 A3h –MFR_PIN_MAX..............................................................................................................................35
1.102 A4h –MFR_VOUT_MIN...........................................................................................................................35
1.103 A5h –MFR_VOUT_MAX..........................................................................................................................35
1.104 A6h –MFR_IOUT_MAX...........................................................................................................................36
1.105 A7h –MFR_POUT_MAX..........................................................................................................................36
1.106 A8h –MFR_TAMBIENT_MAX..................................................................................................................36
1.107 ADh –IC_DEVICE_ID ..............................................................................................................................36
1.108 AEh –IC_DEVICE_REV............................................................................................................................36
1.109 B0h –USER_DATA_00............................................................................................................................37
2PMBus commands –non-standard...........................................................................................38
2.1 C4h FW_CONFIG_PWM..........................................................................................................................38
2.2 C5h FW_CONFIG_REGULATION ............................................................................................................39
2.3 C6h FW_CONFIG_TELEMETRY...............................................................................................................40
2.4 C8h FW_CONFIG_FAULTS .....................................................................................................................42
2.5 C9h FW_CONFIG_PMBUS......................................................................................................................45
2.6 CAh MFR_IOUT_OC_FAST_FAULT_RESPONSE ....................................................................................46
2.7 CBh FW_CONFIG_DE_THRESH..............................................................................................................46
2.8 CDh MFR_VRECT_SCALE .......................................................................................................................46
2.9 CEh MFR_TRANSFORMER_SCALE.........................................................................................................47
2.10 CFh PWM_DEADTIME.............................................................................................................................47
2.11 D1h MFR_IOUT_OC_FAST_FAULT_LIMIT..............................................................................................49
2.12 D6h PWM_DEADTIME_ADJUSTMENT ...................................................................................................49
2.13 DCh MFR_SELECT_TEMPERATURE_SENSOR .......................................................................................49
2.14 E4h FW_CONFIG_DEADTIME_ADJUSMENT_THRESHOLD ...................................................................50
2.15 EAh MFR_IOUT_APC..............................................................................................................................51
2.16 EBh MFR_MIN_PW.................................................................................................................................51
2.17 F0h MFR_DEBUG_BUFF.........................................................................................................................51
2.18 F1h MFR_SETUP_PASSWORD ...............................................................................................................52
2.19 F2h MFR_DISABLE_SECURITY_ONCE ...................................................................................................52
2.20 F4h MFR_SECURITY_BIT_MASK_LOW ..................................................................................................52
2.21 F5h MFR_SECURITY_BIT_MASK_HIGH .................................................................................................52
2.22 FDh MFR_FIRMWARE_COMMAND_DATA ..............................................................................................53

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XDPP1100 PMBus command set
PMBus commands –standard
2.23 FEh MFR_FIRMWARE_COMMAND..........................................................................................................54
3Patched commands...............................................................................................................56
3.1 3Ah –FAN_CONFIG_1_2........................................................................................................................56
3.2 3Bh –FAN_COMMAND_1.......................................................................................................................56
3.3 3Ch –FAN_COMMAND_2.......................................................................................................................57
3.4 81h –STATUS_FANS_1_2......................................................................................................................57
3.5 C7h –MFR_FREQUENCY_DITHER..........................................................................................................57
3.6 CCh –MFR_BOARD_TRIM......................................................................................................................58
3.7 D0h –MFR_SNAPSHOT_DATA...............................................................................................................58
3.8 D2h –MFR_VDD_SCALE.........................................................................................................................58
3.9 D3h –MFR_VIN_SCALE..........................................................................................................................58
3.10 D4h –MFR_FW_CONFIG_UART .............................................................................................................58
3.11 D5h –MFR_SS_RAMP_FSW ...................................................................................................................59
3.12 DAh –MFR_ISHARE_THRESHOLD.........................................................................................................59
3.13 FCh –MFR_ADDED_DROOP_DURING_RAMP........................................................................................59
Revision history.............................................................................................................................60

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XDPP1100 PMBus command set
PMBus commands –standard
1PMBus commands – standard
1.1 00h – PAGE
The page command provides the ability to configure, control and monitor through only one physical address
either:
- multiple outputs on one unit, or
- multiple non-PMBus devices through a PMBus device to non-PMBus device adapter or bridge.
Table 1 PAGE
Command code
Command name
Write Tx
Read Tx
Bytes
Range/Res
00h
PAGE
Write byte
Read byte
1
0x00, 0x01, 0xFF
1.2 01h – OPERATION
The OPERATION command is used to configure the operational state of the converter, in conjunction with input
from the CONTROL pin. The OPERATION command is used to:
- turn the PMBus device output on and off with commands sent over the PMBus
- select the margin state of the device (margin off, margin high, margin low)
- select whether fault conditions caused by margining are ignored or acted upon
- select whether the output voltage is set by commands over the PMBus or AVSBus
- select whether the converter powers down immediately or follows the programmed TOFF_DELAY and
TOFF_FALL commands when commanded to turn off the output.
Table 2 OPERATION command data byte
7
6
5:4
3:2
1:0
On-/Off-state
0: Off
1: On
Turn-off behavior
1x: Ignore
00: Immediate off
01: Soft off
Voltage command source
00: VOUT_COMMAND
01: VOUT_MARGIN_LOW
10: VOUT_MARGIN_HIGH
Margin fault response
01: Ignore margin fault
10: Act on margin fault
Reserved
Table 3 OPERATION
Command code
Command name
Write Tx
Read Tx
Bytes
01h
OPERATION
Write byte
Read byte
1
1.3 02h – ON_OFF_CONFIG
The ON_OFF_CONFIG command configures the combination of CONTROL pin input and serial bus commands
needed to turn the unit on and off. This includes how the unit responds when power is applied.
Table 4 ON_OFF_CONFIG command data byte
Bit number
Purpose
Value and meaning
[7:5]
Reserved
4
Sets the default to either operate any time
power is present or for the on/off to be
0: Unit powers up any time power is present
regardless of state of the CONTROL pin
1: Unit does not power up until commanded

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XDPP1100 PMBus command set
PMBus commands –standard
Bit number
Purpose
Value and meaning
controlled by CONTROL pin and serial bus
commands
by the CONTROL pin and OPERATION
command (as programmed in bits [3:0])
3
Controls how the unit responds to
commands received via the serial bus
0: Ignore the ON/OFF portion bit [7] of
OPERATION command
1: To start, the unit requires that the ON/OFF
portion of the OPERATION command is
instructing the unit to run
2
Controls how the unit responds to the
CONTROL pin
0: Unit ignores the CONTROL pin (on/off
controlled only the OPERATION command)
1: Unit requires the CONTROL pin to be
asserted to start the unit
1
Polarity of the CONTROL pin
0: Active low
1: Active high
0
CONTROL pin action when commanding
the unit to turn off
0: Soft turn-off, use the programmed
TOFF_DELAY and TOFF_FALL
1: Turn-off immediately (hard stop)
Table 5 ON_OFF_CONFIG
Command code
Command name
Write Tx
Read Tx
Bytes
02h
ON_OFF_CONFIG
Write byte
Read byte
1
1.4 03h – CLEAR_FAULTS
The CLEAR_FAULTS command is used to clear any fault bits that have been set. This command clears all bits in
all status registers simultaneously. At the same time, the device negates (clears, releases) its SMBALERT# signal
output if the device is asserting the SMBALERT# signal.
Table 6 CLEAR_FAULTS
Command code
Command name
Write Tx
Read Tx
Bytes
03h
CLEAR_FAULTS
Send byte
0
1.5 10h – WRITE_PROTECT
The WRITE_PROTECT command is used to control writing to the PMBus device. The intention of this command
is to provide protection against accidental changes. This command is not intended to provide protection
against deliberate or malicious changes to a device’s configuration or operation.
Table 7 WRITE_PROTECT command data byte
Data byte value
Meaning
0x00
Enable writes to all commands
0x20
Disable all writes except to the WRITE_PROTECT, OPERATION, PAGE,
ON_OFF_CONFIG and VOUT_COMMAND commands

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XDPP1100 PMBus command set
PMBus commands –standard
Data byte value
Meaning
0x40
Disable all writes except to the WRITE_PROTECT, OPERATION and PAGE commands
0x80
Disable all writes except to the WRITE_PROTECT command
Table 8 WRITE_PROTECT
Command code
Command name
Write Tx
Read Tx
Bytes
10h
WRITE_PROTECT
Write byte
Read byte
1
1.6 11h – STORE_DEFAULT_ALL
The STORE_DEFAULT_ALL command instructs the PMBus device to copy the entire contents of the operating
memory to the matching locations in the non-volatile default store memory. Any items in operating memory
that do not have matching locations in the default store are ignored.
Table 9 STORE_DEFAULT_ALL
Command code
Command name
Write Tx
Read Tx
Bytes
11h
STORE_DEFAULT_ALL
Send byte
0
1.7 12h – RESTORE_DEFAULT_ALL
The RESTORE_DEFAULT_ALL command instructs the PMBus device to copy the entire contents of the non-
volatile default store memory to the matching locations in the operating memory. The values in the operating
memory are overwritten by the value retrieved from the default store. Any items in the default store that do not
have matching locations in the operating memory are ignored.
Table 10 RESTORE_DEFAULT_ALL
Command code
Command name
Write Tx
Read Tx
Bytes
12h
RESTORE_DEFAULT_ALL
Send byte
0
1.8 15h – STORE_USER_ALL
The STORE_USER_ALL command instructs the PMBus device to copy the entire contents of the operating
memory to the matching locations in the non-volatile user store memory. Any items in operating memory that
do not have matching locations in the user store are ignored.
Table 11 STORE_USER_ALL
Command code
Command name
Write Tx
Read Tx
Bytes
15h
STORE_USER_ALL
Send byte
0
1.9 16h – RESTORE_USER_ALL
The RESTORE_USER_ALL command instructs the PMBus device to copy the entire contents of the non-volatile
user store memory to the matching locations in the operating memory. The values in the operating memory are
overwritten by the value retrieved from the user store. Any items in the user store that do not have matching
locations in the operating memory are ignored.

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XDPP1100 PMBus command set
PMBus commands –standard
Table 12 RESTORE_USER_ALL
Command code
Command name
Write Tx
Read Tx
Bytes
16h
RESTORE_USER_ALL
Send byte
0
1.10 17h – STORE_USER_CODE
The STORE_USER_CODE command instructs the PMBus device to copy the parameter whose command code
matches value in the data byte from the operating memory to the matching location in the non-volatile user
store memory.
Table 13 STORE_USER_CODE
Command code
Command name
Write Tx
Read Tx
Bytes
17h
STORE_USER_CODE
Write byte
1
1.11 18h – RESTORE_USER_CODE
The RESTORE_USER_CODE command instructs the PMBus device to copy the parameter whose command code
matches the value in the data byte from the non-volatile user store memory to the matching location in the
operating memory. The value in the operating memory is overwritten by the value retrieved from the user
store.
Table 14 RESTORE_USER_CODE
Command code
Command name
Write Tx
Read Tx
Bytes
18h
RESTORE_USER_CODE
Write byte
1
1.12 19h – CAPABILITY
This command provides a way for a host system to determine some key capabilities of a PMBus device. This is a
read-only command.
Table 15 CAPABILITY
Command code
Command name
Write Tx
Read Tx
Bytes
19h
CAPABILITY
Read byte
1
1.13 1Bh – SMBALERT_MASK
The SMBALERT_MASK command may be used to prevent a warning or fault condition from asserting the
SMBALERT# signal.
Table 16 SMBALERT_MASK
Command code
Command name
Write Tx
Read Tx
Bytes
1Bh
SMBALERT_MASK
Write word
Block write/Block
read proc. call
2

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XDPP1100 PMBus command set
PMBus commands –standard
1.14 20h – VOUT_MODE
The data byte for the VOUT_MODE command is one byte that consists of a three-bit mode and a 5-bit
parameter, as shown in Figure 1. The three-bit mode sets whether the device uses the ULINEAR16, half-
precision IEEE 754 floating point, VID or DIRECT modes for output voltage related commands. The XDPP1100
only supports ULINEAR16 mode, bit [7:5] = 000. The five-bit parameter N is a 5-bit two’s complement binary
integer, and defines the exponent of the output voltage (Figure 2).
Figure 1 VOUT_MODE command data byte
The setting of VOUT_MODE determines the mode and exponent of the following commands:
VOUT_COMMAND
VOUT_TRIM
VOUT_CAL_OFFSET
VOUT_MAX
VOUT_MIN
VOUT_MARGIN_HIGH
VOUT_MARGIN_LOW
VOUT_OV_WARN_LIMIT
VOUT_OV_FAULT_LIMIT
VOUT_UV_WARN_LIMIT
VOUT_UV_FAULT_LIMIT
IOUT_OC_LV_FAULT_LIMIT
READ_VOUT
POWER_GOOD_ON
POWER_GOOD_OFF
MFR_VOUT_MAX
MFR_VOUT_MIN
Table 17 VOUT_MODE
Command code
Command name
Write Tx
Read Tx
Bytes
Range/Resolution
20h
VOUT_MODE
Write byte
Read byte
1
0x14 –0x18
1.15 21h – VOUT_COMMAND
VOUT_COMMAND sets the output voltage of the device when selected by the OPERATION command.

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XDPP1100 PMBus command set
PMBus commands –standard
Figure 2 VOUT_MODE and VOUT_COMMAND data byte format
Table 18 VOUT_COMMAND
Command code
Command name
Write Tx
Read Tx
Bytes
Format
21h
VOUT_COMMAND
Write word
Read word
2
vout_mode
1.16 22h – VOUT_TRIM
The VOUT_TRIM command is used to apply a fixed offset voltage to the output voltage command value. It is
most typically used by the end user to trim the output voltage at the time the PMBus device is assembled into
the end user’s system.
Table 19 VOUT_TRIM
Command code
Command name
Write Tx
Read Tx
Bytes
Format
22h
VOUT_TRIM
Write word
Read word
2
vout_mode_signed
1.17 23h – VOUT_CAL_OFFSET
The VOUT_CAL_OFFSET command is used to apply a fixed offset voltage to the output voltage command value.
It is most typically used by the PMBus device manufacturer to calibrate a device in the factory.
Table 20 VOUT_CAL_OFFSET
Command code
Command name
Write Tx
Read Tx
Bytes
Format
23h
VOUT_CAL_OFFSET
Write word
Read word
2
vout_mode_signed
1.18 24h – VOUT_MAX
The VOUT_ MAX command sets an upper limit on the output voltage the unit can command regardless of any
other commands or combinations. The intention of this command is to provide a safeguard against a user
accidentally setting the output voltage to a possibly destructive level rather than to be the primary output
overvoltage protection.

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XDPP1100 PMBus command set
PMBus commands –standard
Table 21 VOUT_MAX
Command code
Command name
Write Tx
Read Tx
Bytes
Format
24h
VOUT_MAX
Write word
Read word
2
vout_mode
1.19 25h – VOUT_MARGIN_HIGH
This VOUT_MARGIN_HIGH command loads the unit with the voltage to which the output is to be changed when
the OPERATION command is set to margin high.
Table 22 VOUT_MARGIN_HIGH
Command code
Command name
Write Tx
Read Tx
Bytes
Format
25h
VOUT_MARGIN_HIGH
Write word
Read word
2
vout_mode
1.20 26h – VOUT_MARGIN_LOW
This VOUT_MARGIN_LOW command loads the unit with the voltage to which the output is to be changed when
the OPERATION command is set to margin low.
Table 23 VOUT_MARGIN_LOW
Command code
Command name
Write Tx
Read Tx
Bytes
Format
26h
VOUT_MARGIN_LOW
Write word
Read word
2
vout_mode
1.21 27h – VOUT_TRANSITION_RATE
When a PMBus device receives either a VOUT_COMMAND or OPERATION (margin high, margin low, margin off)
that causes the output voltage to change, this command sets the rate in mV/µs at which the output should
change voltage. This commanded rate of change does not apply when the unit is commanded to turn on or to
turn off. This command has two data bytes in the LINEAR11 data format. An exponent of -3 is supported. The
resolution is 0.125 mV/µs and the range is 0 to 63.875 mV/µs.
Table 24 VOUT_TRANSITION_RATE
Command code
Command name
Write Tx
Read Tx
Bytes
Format
27h
VOUT_TRANSITION_RATE
Write word
Read word
2
U6.3
1.22 28h – VOUT_DROOP
The VOUT_DROOP sets the rate, in mV/A (mΩ), at which the output voltage decreases (or increases) with
increasing (or decreasing) output current for use with adaptive voltage positioning requirements and passive
current sharing schemes. This command has two data bytes in LINEAR11 data format. The maximum droop
resistance is limited by 15.9922 mΩ/VOUT_SCALE_LOOP.
Table 25 VOUT_DROOP
Command code
Command name
Write Tx
Read Tx
Bytes
28h
VOUT_DROOP
Write word
Read word
2

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XDPP1100 PMBus command set
PMBus commands –standard
1.23 29h – VOUT_SCALE_LOOP
The VOUT_SCALE_LOOP command scales VOUT_COMMAND, etc. for the external resistor divider on the voltage
sense input to the device. The vout_scale register has LSB 2^-16, range 0.0 to 0.99998.
For example, for resistor divider ratio 0.1, set VOUT_SCALE_LOOP = 0.1 * 2^16 = 6554 (D) = 199 A (H). Write
VOUT_SCALE_LOOP = 0x199 A would set the scale to 0.1.
D: Data in decimal
H: Data in hex
Table 26 VOUT_SCALE_LOOP
Command code
Command name
Write Tx
Read Tx
Bytes
Format
29h
VOUT_SCALE_LOOP
Write word
Read word
2
U0.16
1.24 2Bh – VOUT_MIN
The VOUT_ MIN command sets a lower limit on the output voltage the unit can command regardless of any
other commands or combinations. The intention of this command is to provide a safeguard against a user
accidentally setting the output voltage to a possibly destructive level rather than to be the primary output
undervoltage protection.
Table 27 VOUT_MIN
Command code
Command name
Write Tx
Read Tx
Bytes
Format
2Bh
VOUT_MIN
Write word
Read word
2
vout_mode
1.25 32h – MAX_DUTY
The MAX_DUTY command sets the maximum duty cycle, in percent, of the unit’s power conversion stage. This
command has two data bytes in the LINEAR11 data format.
Table 28 MAX_DUTY
Command code
Command name
Write Tx
Read Tx
Bytes
Format
32h
MAX_DUTY
Write word
Read word
2
U7.2
1.26 33h – FREQUENCY_SWITCH
The FREQUENCY_SWITCH command sets the switching frequency in kHz. This command has two data bytes in
the LINEAR11 data format.
Table 29 FREQUENCY_SWITCH
Command code
Command name
Write Tx
Read Tx
Bytes
Format
33h
FREQUENCY_SWITCH
Write word
Read word
2
U11.0, U11.-1
1.27 34h – POWER_MODE
The POWER_MODE command is used to set or read the PMBus device power conversion mode of operation.

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XDPP1100 PMBus command set
PMBus commands –standard
Table 30 POWER_MODE
Command code
Command name
Write Tx
Read Tx
Bytes
Value/Meaning
34h
POWER_MODE
Write byte
Read byte
1
0x00: Max. efficiency
0x03: Max. power
1.28 35h – VIN_ON
The VIN_ON command sets the value of the input voltage, in volts, at which the unit should start power
conversion. This command has two data bytes in the LINEAR11 data format.
Table 31 VIN_ON
Command code
Command name
Write Tx
Read Tx
Bytes
Format
35h
VIN_ON
Write word
Read word
2
U6.2, U7.1
1.29 36h – VIN_OFF
The VIN_OFF command sets the value of the input voltage, in volts, at which the unit, once operation has
started, should stop power conversion. This command has two data bytes in the LINEAR11 data format.
Table 32 VIN_OFF
Command code
Command name
Write Tx
Read Tx
Bytes
Format
36h
VIN_OFF
Write word
Read word
2
U6.2, U7.1
1.30 37h – INTERLEAVE
The INTERLEAVE command is used to arrange multiple units so that their switching periods can be distributed
in time. This may be used to facilitate paralleling of multiple units or to reduce AC currents injected into the
power bus.
Table 33 INTERLEAVE command data byte
Byte
High byte
Low byte
Bit number
7:4
3:0
7:4
3:0
Contents
Not used
Group ID number
Number in group
Interleave order
Default value
00
00
00
00
If the Group ID number is zero, then Number in group and Interleave order number are zeroes and the
programming of these numbers is disabled. If the Group ID number is non-zero, the user can set Number in
group and Interleave order.
The phase shift (lag) is defined by: 360˚ × 𝐼𝑛𝑡𝑒𝑟𝑙𝑒𝑎𝑣𝑒_𝑜𝑟𝑑𝑒𝑟
𝑁𝑢𝑚𝑏𝑒𝑟_𝑖𝑛_𝑔𝑟𝑜𝑢𝑝
Table 34 INTERLEAVE
Command code
Command name
Write Tx
Read Tx
Bytes
37h
INTERLEAVE
Write word
Read word
2

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XDPP1100 PMBus command set
PMBus commands –standard
1.31 39h – IOUT_CAL_OFFSET
The IOUT_CAL_OFFSET is used to null out any offsets in the output current sensing circuit. This command is
used to minimize the offset error of the current sensing circuit. This command has two data bytes in the
LINEAR11 data format.
Table 35 IOUT_CAL_OFFSET
Command code
Command name
Write Tx
Read Tx
Bytes
Format
39h
IOUT_CAL_OFFSET
Write word
Read word
2
S5.3
1.32 40h – VOUT_OV_FAULT_LIMIT
The VOUT_OV_FAULT_LIMIT command sets the value of the output voltage measured at the sense or output
pins that causes an output overvoltage fault.
Table 36 VOUT_OV_FAULT_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
40h
VOUT_OV_FAULT_LIMIT
Write word
Read word
2
vout_mode
1.33 41h – VOUT_OV_FAULT_RESPONSE
The VOUT_OV_FAULT_RESPONSE command instructs the device on what action to take in response to an
output overvoltage fault. This command returns one data byte with contents as follows:
Table 37 VOUT_OV_FAULT_RESPONSE data format
Bit
Meaning
7:6
Response:
00: Ignore
01: Operate for delay time then shut down if fault condition is still present
10: Disable and retry
11: Disable and resume when OK
5:3
Retry setting:
000: No retry
001 to 110: Retry 1 to 6 times based on number
111: Retry continuously
2:0
Delay time in ms.
Delay time, ms = (2^delay time) * Vout_Delay_Unit (configured by FW_CONFIG_FAULTS)
Table 38 VOUT_OV_FAULT_RESPONSE
Command code
Command name
Write Tx
Read Tx
Bytes
Format
41h
VOUT_OV_FAULT_RESPONSE
Write byte
Read byte
1
See Table 37

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XDPP1100 PMBus command set
PMBus commands –standard
1.34 42h – VOUT_OV_WARN_LIMIT
The VOUT_OV_WARN_LIMIT command sets the value of the output voltage at the sense or output pins that
causes an output voltage high warning. This value is typically less than the output overvoltage threshold. The
warning limit is used by firmware (FW) as the hysteresis of the VOUT_OV fault.
Table 39 VOUT_OV_WARN_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
42h
VOUT_OV_WARN_LIMIT
Write word
Read word
2
vout_mode
1.35 43h – VOUT_UV_WARN_LIMIT
The VOUT_UV_WARN_LIMIT command sets the value of the output voltage at the sense or output pins that
causes an output voltage low warning. This value is typically greater than the output undervoltage fault
threshold. The warning threshold is used by FW as the hysteresis of the VOUT_UV fault.
Table 40 VOUT_UV_WARN_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
43h
VOUT_UV_WARN_LIMIT
Write word
Read word
2
vout_mode
1.36 44h – VOUT_UV_FAULT_LIMIT
The VOUT_UV_FAULT_LIMIT command sets the value of the output voltage at the sense or output pins that
causes an output undervoltage fault.
Table 41 VOUT_UV_FAULT_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
44h
VOUT_UV_FAULT_LIMIT
Write word
Read word
2
vout_mode
1.37 45h – VOUT_UV_FAULT_RESPONSE
The VOUT_UV_FAULT_RESPONSE command instructs the device on what action to take in response to an
output undervoltage fault. This command returns one data byte with contents as follows:
Table 42 VOUT_UV_FAULT_RESPONSE data format
Bit
Meaning
7:6
Response:
00: Ignore
01: Operate for delay time then shut down if fault condition is still present
10: Disable and retry
11: Disable and resume when OK
5:3
Retry setting:
000: No retry
001 to 110: Retry 1 to 6 times based on retry number
111: Retry continuously

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XDPP1100 PMBus command set
PMBus commands –standard
Bit
Meaning
2:0
Delay time in ms.
Delay time, ms = (2^delay time) * Vout_Delay_Unit (configured by FW_CONFIG_FAULTS)
Table 43 VOUT_UV_FAULT_RESPONSE
Command code
Command name
Write Tx
Read Tx
Bytes
Format
45h
VOUT_UV_FAULT_RESPONSE
Write byte
Read byte
1
See Table 42
1.38 46h – IOUT_OC_FAULT_LIMIT
The IOUT_OC_FAULT_LIMIT command sets the value of the output current, in amperes, that causes the
overcurrent detector to indicate an overcurrent fault condition. This command has two data bytes in the
LINEAR11 data format.
Table 44 IOUT_OC_FAULT_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
46h
IOUT_OC_FAULT_LIMIT
Write word
Read word
2
U8.0
1.39 47h – IOUT_OC_FAULT_RESPONSE
The IOUT_OC_FAULT_RESPONSE command instructs the device on what action to take in response to an
output overcurrent fault. This command returns one data byte with contents as follows:
Table 45 IOUT_OC_FAULT_RESPONSE data format
Bit
Meaning
7:6
Response:
00: Continues to operate while maintaining the output current (CC)
01: Continues to operate while maintaining the output current, with overcurrent low
voltage protection
10: Continues to operate while maintaining the output current for delay time
11: Shut down and retry
5:3
Retry setting:
000: No retry
001 to 110: Retry 1 to 6 times based on retry number
111: Retry continuously
2:0
Delay time in ms.
Delay time, ms = (2^delay time) * Vout_Delay_Unit (configured by FW_CONFIG_FAULTS)
Table 46 IOUT_OC_FAULT_RESPONSE
Command code
Command name
Write Tx
Read Tx
Bytes
Format
47h
IOUT_OC_FAULT_RESPONSE
Write byte
Read byte
1
See Table 45

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XDPP1100 PMBus command set
PMBus commands –standard
1.40 48h – IOUT_OC_LV_FAULT_LIMIT
In the case where the response to an overcurrent condition is to operate in a constant current mode unless the
output voltage is pulled below the specified value, the IOUT_OC_LV_FAULT_LIMIT specifies that voltage
threshold.
Table 47 IOUT_OC_LV_FAULT_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
48h
IOUT_OC_LV_FAULT_LIMIT
Write word
Read word
2
vout_mode
1.41 4Ah – IOUT_OC_WARN_LIMIT
The IOUT_OV_WARN_LIMIT command sets the value of the output current that causes an output overcurrent
warning. The IOUT_OC warning threshold is used by FW as the fault hysteresis. This command has two data
bytes in the LINEAR11 data format.
Table 48 IOUT_OC_WARN_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
4Ah
IOUT_OC_WARN_LIMIT
Write word
Read word
2
U8.0
1.42 4Bh – IOUT_UC_FAULT_LIMIT
For units with a synchronous rectifier in the output, current can flow from the unit to the load or from the load
into the output. When current is flowing from the unit to the load the unit is said to be sourcing current and the
output current is declared to be positive. When current is flowing into the unit from the load, the unit is said to
be sinking current and the current is declared to be negative.
Table 49 IOUT_UC_FAULT_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
4Bh
IOUT_UC_FAULT_LIMIT
Write word
Read word
2
S8.0
1.43 4Ch – IOUT_UC_FAULT_RESPONSE
The IOUT_UC_FAULT_RESPONSE command instructs the device on what action to take in response to an
output undercurrent fault. This command returns one data byte with contents as follows:
Table 50 IOUT_UC_FAULT_RESPONSE data format
Bit
Meaning
7:6
Response:
00: Ignore
01: Operate for delay time then shut down if fault condition is still present
10: Disable SR and retry
11: Disable SR and resume when OK
5:3
Retry setting:
000: No retry
001 to 110: Retry 1 to 6 times based on retry number

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XDPP1100 PMBus command set
PMBus commands –standard
Bit
Meaning
111: Retry continuously
2:0
Delay time in ms.
Delay time, ms = (2^delay time) * Vout_Delay_Unit (configured by FW_CONFIG_FAULTS)
Table 51 IOUT_UC_FAULT_RESPONSE
Command code
Command name
Write Tx
Read Tx
Bytes
Format
4Ch
IOUT_UC_FAULT_RESPONSE
Write byte
Read byte
1
See Table 50
1.44 4Fh – OT_FAULT_LIMIT
The OT_FAULT_LIMIT command sets the temperature of the unit, in degrees Celsius, at which it should indicate
an overtemperature fault. This command has two data bytes in the LINEAR11 data format.
Table 52 OT_FAULT_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
4Fh
OT_FAULT_LIMIT
Write word
Read word
2
U8.0
1.45 50h – OT_FAULT_RESPONSE
The OT_FAULT_RESPONSE command instructs the device on what action to take in response to an
overtemperature fault. This command returns one data byte with contents as follows:
Table 53 OT_FAULT_RESPONSE data format
Bit
Meaning
7:6
Response:
00: Ignore
01: Operate for delay time then shut down if fault condition is still present
10: Disable and retry
11: Disable and resume when OK
5:3
Retry setting:
000: No retry
001 to 110: Retry 1 to 6 times based on retry number
111: Retry continuously
2:0
Delay time in ms.
Delay time, ms = (2^delay time) * Vout_Delay_Unit (configured by FW_CONFIG_FAULTS)
Table 54 OT_FAULT_RESPONSE
Command code
Command name
Write Tx
Read Tx
Bytes
Format
50h
OT_FAULT_RESPONSE
Write byte
Read byte
1
See Table 53

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XDPP1100 PMBus command set
PMBus commands –standard
1.46 51h – OT_WARN_LIMIT
The OT_WARN_LIMIT command sets the temperature of the unit, in degrees Celsius, at which it should indicate
an overtemperature (OT) warning alarm. The OT warning threshold is used by FW as hysteresis of the OT fault.
This command has two data bytes in the LINEAR11 data format.
Table 55 OT_WARN_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
51h
OT_WARN_LIMIT
Write word
Read word
2
U8.0
1.47 52h – UT_WARN_LIMIT
The UT_WARN_LIMIT command sets the temperature of the unit, in degrees Celsius, at which it should indicate
an undertemperature (UT) warning alarm. The UT warning threshold is used by FW as hysteresis of the UT fault.
This command has two data bytes in the LINEAR11 data format.
Table 56 UT_WARN_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
52h
UT_WARN_LIMIT
Write word
Read word
2
S9.-1
1.48 53h – UT_FAULT_LIMIT
The UT_FAULT_LIMIT command sets the temperature of the unit, in degrees Celsius, at which it should indicate
an UT fault. This command has two data bytes in the LINEAR11 data format.
Table 57 UT_FAULT_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
53h
UT_FAULT_LIMIT
Write word
Read word
2
S9.-1
1.49 54h – UT_FAULT_RESPONSE
The UT_FAULT_RESPONSE command instructs the device on what action to take in response to an UT fault.
This command returns one data byte with contents as follows:
Table 58 UT_FAULT_RESPONSE data format
Bit
Meaning
7:6
Response:
00: Ignore
01: Operate for delay time then shut down if fault condition is still present
10: Disable and retry
11: Disable and resume when OK
5:3
Retry setting:
000: No retry
001 to 110: Retry 1 to 6 times based on retry number
111: Retry continuously

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XDPP1100 PMBus command set
PMBus commands –standard
Bit
Meaning
2:0
Delay time in ms.
Delay time, ms = (2^delay time) * Vout_Delay_Unit (configured by FW_CONFIG_FAULTS)
Table 59 UT_FAULT_RESPONSE
Command code
Command name
Write Tx
Read Tx
Bytes
Format
54h
UT_FAULT_RESPONSE
Write byte
Read byte
1
See Table 58
1.50 55h – VIN_OV_FAULT_LIMIT
The VIN_OV_FAULT_LIMIT command sets the value of the input voltage that causes an input overvoltage fault.
This command has two data bytes in the LINEAR11 data format.
Table 60 VIN_OV_FAULT_LIMIT
Command code
Command name
Write Tx
Read Tx
Bytes
Format
55h
VIN_OV_FAULT_LIMIT
Write word
Read word
2
U7.2
1.51 56h – VIN_OV_FAULT_RESPONSE
The VIN_OV_FAULT_RESPONSE command instructs the device on what action to take in response to an input
overvoltage fault. This command returns one data byte with contents as follows:
Table 61 VIN_OV_FAULT_RESPONSE data format
Bit
Meaning
7:6
Response:
00: Ignore
01: Operate for delay time then shut down if fault condition is still present
10: Disable and retry
11: Disable and resume when OK
5:3
Retry setting:
000: No retry
001 to 110: Retry 1 to 6 times based on retry number
111: Retry continuously
2:0
Delay time in ms.
Delay time, ms = (2^delay time) * Vout_Delay_Unit (configured by FW_CONFIG_FAULTS)
Table 62 VIN_OV_FAULT_RESPONSE
Command code
Command name
Write Tx
Read Tx
Bytes
Format
56h
VIN_OV_FAULT_RESPONSE
Write byte
Read byte
1
See Table 61
1.52 57h – VIN_OV_WARN_LIMIT
The VIN_OV_WARN_LIMIT command sets the value of the input voltage that causes an input voltage high
warning. This value is typically less than the input overvoltage fault threshold. The VIN_OV warning threshold is