Cosel CHS series Use and care manual

PMBus communication manual
© 2016 COSEL CO.,LTD. ver4.0. 6/15 2016
CHS300/400/500-I
PMBus communication manual

Applications Manual
1. PMBus interface cable&connection
Terminal function
Terminal function on CHS300-I
Terminal function on CHS400/500-I
How to connect communication
Example of cabling pattern on PMBus communication
PMBus communication pull-up resistor value
Address setting
2. PMBus communication control
Overview of control block
RAM (Random Access Memory)
ROM (Random Access Read Only Memory)
Retain the number of abnormal power supply stopping
3. Data format
Data format for output voltage
Data format for another parameter
4. C2 terminal function
Power_Good function
Secondary side remote control function
5. SMBAlert function
SMBAlert terminal connecting
Checking salve for SMBAlert signal
In case multiple slave devices issue SMB Alert signal
How to do when SMB alert is issued repeatedly
6. Explain several functions
ON/OFF operation
Start-stop voltage
Start-up sequence (start-up delay / rising up)
Setting output voltage
Protective operation for output overvoltage
Protective operation for output undervoltage
Protective operation for overtemperature
Protective operation for undertemperature
Protecting operation for over start-up time
Prohibit re-writing parameter
7. Packet error checking
（
（（
（
PEC
）
））
）
8. PMBus Hardware specifications
Ultimate maximum rate on communication terminal
Electrical characters specification on communication terminal
9. PMBus software Specifications
List of PMBus command
PMBus command setting / reading value
10. PMBus Commands set
CHS300/400/500-I series
Page
2
6
2.1
6
1.3
4
1.4
5
8
1.1
2
3.2
8
2.3
7
2.4
7
5.2
1.5
5
9
4.1
9
4.2
9
2.2
6
23
8.1
18
3.1
8
6.2
12
6.3
13
5.1
6.5
6.6
10
19
10
13
14
14
15
10
15
9.2
25
20
9.1
6.9
17
20
8.2
6.4
12
6.1
12
1.1.1
1.1.2
2
3
1.2
4
11
11
19
19
5.3
5.4
6.10
17
6.7
6.8
- 1 -

The PMBus can be used to control and monitor the CHS300/400/500 converter.
For detail, refer to PMBus standard spec manual : PMBus Power System Management Protocol Specification
Part I (Revision1.2) and Part II (Revision1.2).
1.1 Terminal function
1.1.1 Terminal function on CHS300-I
The figure and the table below show terminal function and name of pins on CHS300-I.
Table 1-1.1. Pin Descriptions on CHS300-I Notefunction
Power_Good or remote control (secondary side ）
PMBus communication signal ground
PMBus communication data input&output
PMBus communication clock input
Not connected
Alarm output
Address setting
C2
DC output (-)
Remote sensing (-)
Output voltage adjustment
Remote sensing (+)
DC output (+)
DC input(-)
Remote control (first side ）
DC input(+)
Input
terminal
Output
terminal
PMBus
communication
terminal
-S
SMBAlert
Data
Sig_GND14
5
6
7
8
Figure 1-1.1. pin assignment in CHS300-I (top view)
13
Addr0
NC
#
1
2
3
4
15
9
10
11
12
RC
-VIN
Clock
-VOUT
+VOUT
+S
name
+VIN
TRM
2.1
Pin configuration
1. PMBus communication cabling and connection
Applications manual
For CHS300/400/500-Iseries
- 2 -

1.1.2 Terminal function on CHS400/500-I
The figure and the table below show terminal function and name of pins on CHS400/500-I.
Table 1-1.2. Pin Descriptions on CHS400/500-I
*1:
Do not use when adjusting output voltage with PMBus communication.
Remote control (first side ）
function
Input
terminal
+VIN
Figure 1-1.2. pin assignment in CHS400/500-I (top view)
DC output (-)
Remote sensing (+)
6 TRM
10
5
Alarm output
PMBus communication clock input
Address setting
Address setting
DC output (+)
DC input(-)
DC input(+)
2
Remote sensing (-)
Output voltage adjustment
4
Output
terminal
# name
1
8
RC
3 -VIN
7 -S
-VOUT
Clock
12 SMBAlert
9
PMBus
communication
terminal
Addr0
Power_Good or remote control (secondary side ）
Addr1
14 Sig_GND
PMBus communication signal ground
Note
*1
15 C2
PMBus communication data input&output
13 Data
+VOUT
+S
11
Applications manual
For CHS300/400/500-Iseries
- 3 -

1.2 PMBus Communication connections method
The figure and table below show recommended resistors value for hard wiring PMBus addresses.
#
1
2
3
4
5
6
*1 ： Connecting C2 as Power-Good function
*2 ： Refer to clause 1.4 PMBus communication
pull-up resistor
*3 ： refer to clause 1.5 address setting
1.3 PMBus communication cable pattern example
When connecting the PMBus communication cable, please make sure design to minimize
noise from outside and crosstalk by positioning Sig_GND between Data bus and Clock bus
as shown figure 1-3.
Also, do the right setting for pull-up resistor as parasitic capacitance is happened by way of
shielding and length of cabling. (refer to clause 1.4)
R4
R5,R7
Figure 1-3 Pattern example
*
3
Figure 1-2 PMBus interface cable chart
R2
*
3
component
Setting value
R6,R8
R1
10k Ω (recommend)
*
2
10k Ω (recommend)
*
1
*
2
*
2
R3
Sig_GND
Data Bus
Clock Bus
R1 R2 R3 R4
R5 R6
R7 R8
●
●
Sig_GND
Sig_GND
C2
SMBAlert
Clock
Data Addr0
C2
SMBAlert
Clock
Data
Addr1
Addr0
Addr1
スレーブデバイス2
(CHS)
スレーブデバイス1
(CHS)
マスター
デバイス
●
●●
● ●
●
●●
●
●
●
●
プ アップ電圧
●
●
●
●
●
●
●
●
Position Sig_GND pattern
between clock bus and Data bus
Slave device 1
(CHS)
Master
device
pull-up
Slave device 2
(CHS)
Applications manual
For CHS300/400/500-Iseries
- 4 -

1.4 PMBus communication pull-up resistor value
It is necessary to connect pull-up resistor on Data bus and Clock bus terminal of PMBus .
Recommended value of resistor(maximum value) is shown at figure 1-4.
Note1: Do not exceed the rated output current of converter's terminal (clause 8-1).
Note2: Total of parasitic capacitance and input capacitance should be less 400pF.
1.5 address setting
The figure and table below show recommended resistors value for hard wiring PMBus addresses.
Resistors with 1% tolerance are recommended.
*
1
*
2
Take 0-7 on Addr0, Addr1 per value of resistor and address could be assigned 0-63 per
below formula. when calculation result in 0-12,40,44,45,55 setting, address 127 will be return.
*1: Address setting could not be changed after input voltage is applied .
Be sure to make setting before input voltage is applied.
*2: Addr1 is only CHS400/500-I.
The formula for CHS300-I
The formula for CHS400/500-I
10 01
24
Table 1-2 Resistor value
Figure 1-4 Recommended value of pull-up resistor
7
5
6
8 220
36
7
3
5
4
1
2
2
ValueResistor value [k Ω ]#
15
82
130
3
56
6
4
Figure 1-5 Address setting
Address = 16 + Value(Addr0)
Address = Value(Addr1) × 8 + Value(Addr0)
Applications manual
For CHS300/400/500-Iseries
- 5 -

2.1 Overview for Control block
This product has built-in RAM and ROM.
Based on the memory parameter, controlling power supply and PMBus communication
are implemented. Conceptual diagram shown in figure 2-1.
2.2 RAM
2.2.1 Operating memory
When power supply is being operated, it refers to setting value of operating memory
with RAM and control it. Since setting change by PMBus communication command is
preserved in operating memory, the setting will be lost after a reset unless they are stored
to data flash.
2.2.2 STATUS memory
You can check status of power supply by reading status memory(command [ 78h ]-[ 7Eh ]).
Corresponding bit on Status memory is set to 1 when power supply has something abnormal.
It will be clear by implementing command of CLEAR_FAULTS [ 03h ], blocking input voltage,
stopping ON/OFF operation (refer to clause 6.1).
Figure 2-1 Conceptual diagram of communication control
2.1
Pin configuration
2. PMBus communication control
CHS (Slave device)
Microcontroller
RAM ROM
Master device
Control
User store
Memory
(EEPROM)
Operating
Memory
ClearRead
STATUS
Memory
Read operating status
PMBus communication with master evice
Converter circuit
Sense operating information
Control Signal
Parameter change
PMBus Interface
PMBus
Capture
Refer
parameter
Operating information Update
Status
Update
Data check
Default store
Memory
(Data ROM)
Recover
Recover
Applications manual
For CHS300/400/500-Iseries
- 6 -

2.3 ROM
2.3.1 DEFAULT STORE MEMORY
Default store memory preserves initial parameter in factory shipment.
Restored information to operating memory is being done by implementing
RESTORE_DEFAULT_ALL [ 12h ] command. *1
2.3.2 USER STORE MEMORY
It is memory to preserve the content of operating memory rewritten by master device after input
voltage after input voltage is insulated. Information is restored by implementing
RESTORE_USER_ALL [ 16h ] command and when power supply is started-up. *1
Information within operating memory is preserved in user store memory by implementing
STORE_USER_ALL [ 15h ] command. *2
*1: Valid only for power supply operation is stopped.
Cannot receive command when power supply is operated. SMBAlert is operated.
*2:
Please do not insulate input voltage over 3 seconds when command is being implemented.
2.4 Retaining the number of protecting operation
When each protective function are operated, the number of information(0-255times) is
preserved in ROM. Command shown in table 2-1 can read the number of protective
operation and delete the number of counts.
Table 2-1 Reading command for the number of stopping abnormal power supply
Note: In case response of protective operation is auto recovery, it is counted every time
this function is operated after recovery.
8
MFR_CLEAR_FAULT_CNT
F5h
Reset the number of operation at F0h ～ F7h to "00h".
Figure 2-2 Restore and preserving operation for command and parameter
MFR_READ_VIN_OV_FAULT_COUNT
F8h
Read the number of over input voltage protective operation
7
MFR_READ_VIN_UV_FAULT_COUNT
F9h
Read the number of low input voltage protective operation
F2h
Command Code Note
F4h
Read the number of over star-up time protective operation
MFR_READ_TON_MAX_FAULT_COUNT
1
MFR_READ_VOUT_OV_FAULT_COUNT
F0h
Read the number of overvoltage protective operation
#
2
MFR_READ_VOUT_UV_FAULT_COUNT
F1h
Read the number of low output voltage protective operation
3
MFR_READ_OT_FAULT_COUNT
Read the number of overheating protective operation
6
4
MFR_READ_UT_FAULT_COUNT
F3h
Read the number of low temperature protective operation
5
_RAM ROM_
Operating memory
Store
STORE_USER_ALL [15h]
Restore
RESTORE_USER_ALL [16h] User store memory
(EEPROM)
Default store memory
(Data ROM)
Restore
RESTORE_DEFAULT_ALL [12h]
Applications manual
For CHS300/400/500-Iseries
- 7 -

3.1 Data format for output voltage
Please set output voltage and read per shown linear format below.
Data byte Low 5 bit of VOUT MODE [ 20h ] is complement notation by 2 and represents
index part N with code and is fixed -12.
Mantissa part Y is represented 16 bit data without code.
3.2 Other
（
except output voltage
）
data format
In compliance with below linear format, please make setting and reading.
Date dyte High 5 bit is complement notation by 2 and represents index part N with code
and varies with data. Mantissa part Y is complement notation by 2 with code and
represents 11 bit data. *1
Table 3-1 Index part N value
*1: Index part N value is fixed.
2 Input voltage
UnitData format
1 Output voltage 10100 -12
# Item
WLinear(Pin)
11101 -3 VLinear(Vin)
N(5bit) Characteristics N (*1)
 C
Linear(Temp)
times
ms
VLinear(Vo)
0
-1
3 Output current 11101 -3 ALinear(Iout)
Starting-up time 11111
5 Input wattage 00000
00000 0Linear(Count)
Linear(Time)
6 Temperature 11110 -2
8 Count
7
2.1
Pin configuration
3. Data format
VALUE = Y ・ 2
N
N Y
Data Byte High Data Byte Low
3210765432107654
VOUT_MODE [ 20h ]
Data Byte Low
10 04 3 2 17 67 6
Data Byte High
03 25 45 4 3 2
V LUE = Y ・ 2
N
N Y
51
000
Data Byte
7 6
Applications manual
For CHS300/400/500-Iseries
- 8 -

C2 terminal can select Power_Good function and remote control （ secondary side ） function.
Please select function by MFR_C2_ARA_CONFIG [ E0h ] Initial setting is Power_Good function.
4.1 Power_Good function
Power_Good terminal output is open drain. When you use Power_Good function, please
connect C2 terminal with pull-up resistor. Initial setting of Power_Good signal is negative.
(Please make logic setting by MFR_PGOOD_POLARITY [ E2h ])
If output voltage is beyond setting value of POWER_GOOD_ON [ 5Eh ] , C2 terminal
will be low.
If output voltage is lower than the setting value of POWER_GOOD_OFF [ 5Fh ] ,
C2 terminal will be high.
Also, during 10ms in charging input voltage, voltage level on C2 terminal is unstable.
4.2 Remote control (Secondary side) function
Initial setting of Remote control (secondary side) function is negative and is invalid
when you select function.
Selecting logic and setting for invalid or valid function can be made by MFR_C2_LOGIC [ E1h ].
2.1
Pin configuration
4. C2 Terminal function
Applications manual
For CHS300/400/500-Iseries
- 9 -