Texas Instruments TPS658 EVM Series User manual

User's Guide
SLVU154B–March 2006–Revised October 2013
TPS658xxEVM Integrated Single-Cell, Lithium-Ion
Battery- and Power-Management IC With I2C, LED Drives,
Two Synchronous Buck, Boost, and Multiple LDOs
This user’s guide is an easy-to-use document that describes the equipment, hardware, software, setup,
and a step-by-step procedure to evaluate the features of the TPS65800/810/820/825. The power IC is
designed to handle 2 A of input current from the adaptor and up to a 3.5-A discharge from the battery. The
charger algorithm is designed to charge a single-cell, Li-ion or Li-polymer battery. The buck, boost, and
LDO supplies typically run off of the OUT (system) pin which is available on the IC and is powered from
the AC, USB, or battery.
Contents
1 TPS65800/810/820/825 Charger and Power-Management Evaluation Module .................................... 2
2 Test Summary ............................................................................................................... 4
3 Getting Started With Evaluation ........................................................................................... 7
4 Software Feature Description ............................................................................................. 7
5 Interrupts Software LEDs ................................................................................................. 17
6 Physical Layouts ........................................................................................................... 18
List of Figures
1 TPS65810EVM Assembly (Similar to Other Versions) ................................................................ 5
2 Equipment and EVM Setup................................................................................................ 6
3 Charger Section............................................................................................................. 8
4 Buck and Boost Converters Section .................................................................................... 10
5 LDO Section................................................................................................................ 11
6 Analog to Digital Converter Section..................................................................................... 12
7 PWM Drivers and RGB Drivers Section................................................................................ 14
8 Register Map Section..................................................................................................... 15
9 GPIO and Mask Control Section ........................................................................................ 16
10 Board Layout Top Layer.................................................................................................. 18
11 Board Layout Layer 2..................................................................................................... 18
12 Board Layout Layer 3..................................................................................................... 19
13 Board Layout Bottom Layer ............................................................................................. 19
14 Board Layout Top Assembly Layer ..................................................................................... 20
15 TPS65800/810EVM Schematic.......................................................................................... 27
List of Tables
1 TPS65800/810/820/825 Outputs and Operational Range ............................................................ 3
2 Performance Specification Summary..................................................................................... 4
3 HPA129A BOM – TPS65800/810....................................................................................... 21
4 HPA184A BOM – TPS65820/825....................................................................................... 24
Windows is a registered trademark of Texas Instruments.
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TPS65800/810/820/825 Charger and Power-Management Evaluation Module www.ti.com
1 TPS65800/810/820/825 Charger and Power-Management Evaluation Module
1.1 Background
The TPS65800/810/820/825 is designed to provide, in a single monolithic IC, flexible charge and system
power-path management for a USB-port and AC-adapter supply; as well as multiple power supply outputs,
and a number of value-added circuit options to supply an integrated solution for applications powered by
one Li-ion or Li-polymer cell, and requiring multiple voltage rails. The TPS65800/810/820/825 features two
highly efficient, step-down converters targeted at providing the core voltage, and peripheral I/O rails in a
processor-based system. Both converters enter a low-power mode at light load for maximum efficiency
across the widest possible range of load currents. The TPS65800/810/820/825 also integrates a boost-
type LED driver, six LDO regulators (five programmable and one fixed), one programmable SIM interface
LDO, and an integrated backup block for a battery/rechargeable capacitor. The TPS65800/810/820/825
powers the system while independently charging the battery. This feature reduces the charge and
discharge cycles on the battery and allows for proper charge termination and system operation with an
absent or defective battery pack. The system can instantaneously turn on using an external power source
in the case of a deeply discharged battery pack. The TPS65800/810/820/825 automatically selects the
USB port or the AC adapter as the power source for the system. In the USB configuration, the host can
select from the two preset charge rates of 100 mA and 500 mA. The TPS65800/810/820/825 dynamically
adjusts the USB charge rate based on system load to stay within the 100-mA or 500-mA charge rates. In
the AC-adapter configuration, an external resistor sets the magnitude of the charge current. The
TPS65800/810/820/825 charges the battery in three phases: conditioning, constant current, and constant
voltage. Charge is terminated based on minimum current. An internal charge timer provides a backup
safety for charge termination. The TPS65800/810/820/825 automatically re-starts the charge if the battery
voltage falls below an internal threshold.
The TPS65800/810/820/825 also features an 8-channel (2 external), 10-bit, successive-approximation A/D
converter with external trigger capabilities performing single, multiple, and continuous readings; and,
returning maximum, minimum, or continuous average values. It also has three programmable general-
purpose input output (GPIO) ports . GPIO3 is programmed by default as a trigger for the A/D converter.
Two general-purpose PWM drivers and an RGB driver, with programmable current, are also included to
provide a highly integrated solution suitable for hand-held and other portable applications.
The TPS65810 is similar to the TPS65800, but has a few changes as follows:
1. The switcher and LDO outputs may have different default values and may be enabled or disabled
differently. See Table 1 for differences.
2. The USB boot up is disabled, and ISET2 defaults to high (500-mA current limit level).
3. The charger defaults to off.
4. The TS current bias is turned off, so external biasing is required to create a battery temperature
feedback voltage.
5. I2C and read state of GPIO1/2/3.
6. Hot Reset reloads register defaults values and internal pullup resistor on HOT_RESET removed
(external resistor is on EVM).
7. I2C machine reads interrupt fix.
8. SM1/2 default enable control changed from GPIO1 and I2C to GPIO1 or I2C.
The TPS65820 is based on the TPS65800 with a few changes. See the application report SLVA248 for
the differences among the TPS65800/810/820. The most noticeable difference is on power up, the
CE bit is set for battery-only operation. To operate off the AC adapter input, the AC, USB, or the 2.75-A
maximium option has to be selected.
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www.ti.com TPS65800/810/820/825 Charger and Power-Management Evaluation Module
Table 1. TPS65800/810/820/825 Outputs and Operational Range(1)
Supply Pin Type VOUT TPS65800/810/820/825 TPS65810 IOMAX Acc % Steps Eff %
(V) (mA)
VOUT Default VOUT Default
(V) EN/DISabled (V) EN/DISabled
SM1 44 Buck converter 0.6–1.8 1.24 Enabled 1.24 Enabled 600 3 32 90
SM2 49 Buck converter 1.0–3.4 1.8 Enabled 3.32 Enabled 600 3 32 90
SM3 42 Boost output 5–25 Current Disabled Current Disabled 25 10 256 80
driven driven
SIM 5 General-purpose LDO 1.8 or 3.0 1.8(2) Disabled 2.5 Enabled 8 5 2 –
LDO_PM 10 General-purpose LDO (only active if AC or 3.3 3.3 Enabled 3.3 Enabled 20 5 Fixed –
USB present)
LDO0 32 General-purpose LDO disabled by default 3.3 3.3 Disabled 3.3 Disabled 150 3 Fixed –
LDO1 37 General-purpose LDO 1.25–3.3 2.85 Enabled 1.25 Disabled 150 3 8 –
LDO2 33 General-purpose LDO 1.25–3.3 3.3 Enabled 3.3 Disabled 150 3 8 –
LDO3 28 High PSRR LDO 1.224–4.4 1.25(3) Enabled 1.5 Disabled 100 3 128 –
LDO4 27 High PSRR LDO 1.224–4.4 2.8 Enabled 1.8 Disabled 100 3 128 –
LDO5 26 High PSRR LDO 1.224–4.4 2.75 Enabled 3.1 Enabled 100 3 128 –
RTC_OUT 4 Linear regulator and charger 3.1 3.1(4) Enabled 1.5 Enabled 8 5 Fixed –
PWM 34 PWM (adjustable frequency and duty cycle) 150 mA
(1) All output can be controlled and programmed by an I2C-compatible interface. Temperature range is –40°C to 85°C.
(2) TPS65825 SIM has two selections, 1.8 and 2.8 VDC. The IC defaults to 2.8 VDC.
(3) TPS65825 LDO3 defaults to 1.5 VDC.
(4) TPS65820/825 RTC_OUT defaults to 2.6 VDC but 3.1 VDC can be selected.
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Test Summary www.ti.com
1.2 Performance Specification Summary
This section summarizes the performance specifications of the EVM.Table 2 gives the performance
specifications of the EVM.
Table 2. Performance Specification Summary
Specification Test Conditions Min Typ Max Units
Input DC Voltage, VI(DC) VREG +0.5 5.0 6(1) Volts
Battery Charge Current, IO(CHG) 1.5(1) Amps
Power Dissipation Pin-Pout 5 Watts
(1) The AC and USB FETs are rated for 18 VDC (all other pens are <6.5 V, see data sheet) but typically this high rating is for
transients protection and not for normal operation. The thermal layout on this PCB is optimal and can dissipate up to 5 W with an
ambient of 35°C, before the internal junction temperature reaches 125°C. If it is desired to apply DC voltages above 6 V, the
charging and load currents may have to be reduced to stay below the 125°C junction temperature. The IC automatically reduces
the charging current, with its thermal loop, once the temperature reaches ~12°C. Any further load reduction (on switchers or
LDOs) has to be done manually to reduce the junction temperatures. The 125°C threshold is somewhat hard to reach unless the
input voltage is high along with high load current, which is not typical.
2 Test Summary
This section shows the test setups used and the features available in evaluating the EVM.
2.1 EQUIPMENT – SM1/SM2, LDO, and Battery Load Boards not Provided
1. Computer running Windows®XP and the attached software.
2. EV2300 HPA002 I2C communication box, USB cable and I2C 4-lead cable (all purchased separately).
3. SM1/2 load board; 10-Ω, 1-W resistor load for each output TB1-1/2 and TB2-1/2. See Figure 2.
4. LDO load board: 33-Ω, 1-W each for J4-LDO0 to A1 GND, J5-LDO1 to A1 GND, J7-LDO2 to A1 GND;
511-Ω, 0.5-W pullup resistors J10-LED_PWM to TP29-SYS_OUT and PWM to TP29-SYS_OUT; 51-Ω,
1-W load resistors for J19-LDO3 to A2 GND, J18-LDO4 to A2 GND, J16-LDO5 to A2 GND. See
Figure 2.
5. Battery-simulated load board: Two 5.6-Ω, 20-W and one 10-Ω, 5-W resistors in parallel and connected
TB7-1/2 (~2.19 Ω). See Figure 2.
6. Dual power supply, 0-V to 5-V adjustable range, 0-A to 3-A adjustable current limit
7. Scope
8. DMM meter(s).
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www.ti.com Test Summary
Figure 1. TPS65810EVM Assembly (Similar to Other Versions)
2.2 Equipment Setup
(a) Verify that the jumpers are in the correct location. JP5/4/3/8/15/12/11/13/6/16 are to be set to SYS-
OUT, JP7 to +5V, JP14 to RES, JP15 to LDO1, and JP1/2/17/18/9; apply jumper across the two pins.
See Figure 1.
(b) Adjust POT R19 until TP16/A1gnd reads 37K, using DMM.
(c) Adjust POT R12 fully clockwise.
(d) Connect the loads shown in Figure 2. These are suggested loads, but the user can substitute any load
that is within the specification of the IC. The PWM and LED_PWM are open-drain outputs and require
a external pullup resistor to OUT (System Power). TB6-1 or TP29 can be used as a source for
SYS_OUT.
(e) Connect the battery-simulated load board shown in Figure 2 below UUT; leave bias supply off. A
single-cell Li-ion battery can be used in place of the simulated battery if quick battery voltage
adjustment is not needed for evaluation. The battery supply should be the first supply on and the last
supply off to avoid putting the BAT output on an unpowered external supply. A power Schottky diode
can be placed in series with the positive lead (anode to P/S+) of the battery supply to protect the
supply, if necessary.
(f) Connect USB cable to computer’s USB port and the other end to the EV2300 box. Connect the I2C
cable between the EV2300 box and the UUT to TB3
(g) Preset P/S#1 to 5.1 VDC+/-0.1VDC, Current Limit to 2.5A, P/S#2 to 3.5VDC+/-0.1VDC, Current Limit
to 2.5A, turn off supplies, connect P/S#1 to TB5-1&2 (+ to AC), and connect P/S#2 to TB7-1&2 (+ to
BAT_OUT). See Figure 2.
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(h) See the following Software Installation description for directions on installing drivers and application
software.
Figure 2. Equipment and EVM Setup
2.3 Software Installation
The following steps install the TPS65800/810 orTPS65820/825 evaluation software:
1. Insert CD ROM into a CD ROM drive.
2. Select the CD ROM drive using My Computer or File Manager.
3. Select the ReadMeFirst.txt file.
4. Follow the instructions to install USB drivers for EV2300.
5. After installing the USB drivers for EV2300, double-click on the Setup.exe icon that is under the
Software/TPS65800, TPS65810, TPS65820, and/or TPS65825 folder.
6. The setup program installs a Windows application group. Follow the on-screen instructions until
completion.
2.4 Starting the Program
If the EV2300 is connected to the USB port and the EV2300 drivers installed correctly, then the evaluation
software is ready to use. Go to the Getting Started with Evaluation section that follows before starting the
application. Close the application if it is open. If the program was installed at its default location, it can be
found at Start | Texas Instruments | TPS658xx, where xx is 00, 10, 20, or 25 folder.
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www.ti.com Getting Started With Evaluation
3 Getting Started With Evaluation
The evaluation of the TPS65800/810/820/825 is reasonably intuitive when using the software application
and the EVM hardware. The user guide is not a step-by-step procedure but an explanation of the result of
each software feature. It is highly recommended to read through the data sheet to become familiar with
the IC to aid in the evaluation of this EVM. The software code performs several steps per task/feature;
reading the data sheet is the best way to understand how to execute these features in the proposed
product.
This user's guide was written primarily for the TPS65800 but all versions are similar. For a explanation of
the differences among the IC versions, see the TI application report Differences Between the
TPS65800/810/820 PMIC Devices (SLVA248). The TPS65800/820/825 are similar with few changes. The
TPS65810 is similar to the TPS65800 but has different defaults, sequencing, and enable/disable settings.
3.1 Start-Up
1. Verify that the EVM is set up correctly with the jumpers, loads, and supplies connected as described in
the setup procedure.
2. Turn on the P/S #2 (preset to 3.5 VDC across BAT pins, 2.5-A current ).
3. Turn on P/S #1 (preset to 5 V, 2.5-A current limit).
4. Launch software under Start | Texas Instruments | TPS65800/810/820/825 EVSW. The application
should come up communicating with the EVM.
5. The software is organized under 7 TABs. Click through the tabs to see what features the software
controls. Although there is no preferred order to the Evaluation, it may be best to evaluate all the
features under one TAB at a time. The ADC tab should be left to last because this section may take
longer to evaluate.
6. If a communication error occurs, check setup for any connection problems. Also check J14 (SYS_IN)
for a low voltage (<1 V). Close the software and relaunch the application. If the software continues to
have a problem with the communication, close the application, turn off P/S#1, then P/S #2, and
disconnect the USB cable to the USB connection on the EV2300. Reconnect the USB cable, turn on
P/S#2, Turn on P/S#1, and launch the software.
7. When the evaluation is finished, close the application; turn off P/S#1, and then P/S#2.
4 Software Feature Description
4.1 Software Description
Top Menu Description:
File
Start Data Log – Allows the opening of a file so that the logging of a registers’ contents can be
done in a text file. A Close Data Log option appears in its place when logging is occurring.
Exit – Closes the evaluation software.
I2CRead and Write Addresses – Permits reading to any desired register. If a register allows it, then it
can be written.
Options
Refresh – Updates the screen with valid data obtained from the TPS65800/810/820/825. It is useful
for when recovering from a loss of I2C communication.
Logging Options – Allows selecting which registers to log and the time interval between each log
line.
Help
About – Gives information of version release of software.
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4.2 Charger
The charger section allows the user to monitor and control the charger functions of the
TPS65800/810/820/825 (see Figure 3). The TPS65820/825 IC has a unique feature on power up. After
the 150-ms USB boot-up, the PMIC defaults to battery power unless the CE pin is written high prior to the
boot-up expiring. The CE pin is at address 9_B0 and is changed via I2C. If the battery is not present and
CE is not written high prior to the end of the boot-up, then the system crashes because the BAT pin
cannot supply the power. The following controls are available.
• Set Battery Charge Voltage (pulldown window): Default set to 4.2 VDC. To set to 4.36 VDC, select and
then confirm yes.
• Set Charge Rate as a percentage of maximum programmed by ISET1 (pulldown window): Select one
of four choices 25%, 50%, 75%, or 100% of ISET1 programmed level.
• USB pin input current limit (pulldown window): Select the maximum allowed USB input current level,
100 mA, 500 mA, or 2.75 A (soft internal limit).
• System Power Source (pulldown window): Select AC,USB or Battery or Battery Only (AC/USB disable
mode).
• Charge Suspend (box): The user can suspend charge by checking the box.
Charger status indications are:
• Power Good – Indicates if voltages at AC or USB inputs are greater than the battery voltage.
• Status – Indicates if the charger is in Pre-charge, Fast Charge, Charge Done or Charge Suspend
mode.
• Overvoltage – Indicates if the AC or USB source are within voltage range.
• Dynamic Power Path Management (DPPM) – Powers the system via AC, USB, and/or BAT (see the
diagram in Figure 3).
The information windows are data collected and reported by the ADC such as the battery voltage, the
system voltage, the IC temperature, and detection of BATT ID resistor.
Figure 3. Charger Section
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4.3 SM1/SM2/SM3
For the following descriptions of the buck (SM1 and SM2) and boost (SM3) converters, see Figure 4.
SM1 – Synchronous Buck Converter with programmable output: 0.6 VDC-1.8 VDC:
• SM1 Settings: The buck converter can be set in three modes: Normal, Standby and Disabled.
• SM1 Voltage: The voltage can be set by writing the desired voltage value into the text field and then
pressing ENTER. The value is then adjusted to the closest value permitted based on the resolution.
• Stby1 Set: The voltage can be set by writing the desired voltage value into the text field and then
pressing ENTER. The value is then adjusted to the closest value permitted based on the resolution.
• Slew Rate: The slew rate when going from standby set voltage to normal set voltage can be selected
ranging from 0.15 mV/μs up to the maximum slew rate.
• SM1 Mode: The converter can be programmed for PWM ONLY mode or an AUTO mode that switches
between PFM and PWM based on the load.
• The PFM mode can be programmed for low ripple or high efficiency.
• SM1 Discharge Switch Enable: When enabled, applies a resistor to the SM1 output when the output is
disabled for discharging the output capacitor.
• GPIO Control Enable (box): When enabled, allows the GPIO1 input to enable or disable the SM1/2
Settings. GPIO1 can be selected to be an active at high- or low-logic level.
SM2 – Synchronous Buck Converter with programmable output: 1 VDC and 3.4 VDC
The SM2 descriptions are the same as SM1 (i.e., Replace SM1 with SM2).
SM1/SM2 Common Controls
• GPIO1 Control SM1/SM2 Standby (box): The GPIO1 input signal can control Standby on the SM1/SM2
buck converters if the box is checked, when not using GPIO1 for the enable function.
• Phase Shifting (pulldown window): The buck converters can be phase shifted with respect to each
other, in increments of 90°.
• SM1-SM2 Standby: If checked, the SM1/SM2 converters are placed in Standby (does not change SM1
setting selection).
SM3 - Boost Converter
The boost converter is used to drive six white LEDs on the EVM board. To control the intensity of the
light emitted, simply enter a value between 0 and 100 and click the Set button. The value is adjusted to
the nearest available resolution.
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Figure 4. Buck and Boost Converters Section
4.4 LDOs — TPS65800 (See Table 1 for Corresponding Outputs for TPS65810/820/825)
For the following descriptions of the LDO settings, see Figure 5
LDO 0: Fixed at 3.3 VDC, the output is disabled on power up and can be enabled by checking the box.
RTC: Fixed at 3.1 VDC, the output is enabled on power up and can be disabled by unchecking the box.
SIM: Set to 1.8 VDC, and can be changed to 3 VDC; output is disabled on power up and can be enabled
by checking the box.
LDO 1: Default set to 2.85 VDC, and the output can be changed, after power up, via I2C by selecting 1 of
8 settings between 1.25 VDC to 3.3 VDC.
LDO 2: Default set to 3.3 VDC, and the output can be changed, after power up, via I2C by selecting 1 of 8
settings between 1.25 VDC to 3.3 VDC.
LDO 3: Default set to 1.2495 VDC, and the output can be set, after power up, via I2C within the range of
1.22 VDC to 4.46 VDC (128 setting steps).
LDO 4: Default set to 2.754 VDC, and the output can be set, after power up, via I2C within the range of
1.22 VDC to 4.46 VDC (128 setting steps).
LDO 5: Default set to 2.805 VDC, and the output can be set, after power up, via I2C within the range of
1.22 VDC to 4.46 VDC (128 setting steps).
LDO 1–5:
• Output is enabled on power up and comes up to default setting for TPS65800. For TPS65810, outputs
are disabled on power up and have to be enabled by I2C for use.
• LDO x Discharge, where x=1-5: If box is checked, a resistor is applied when the output is disabled to
discharge the capacitor.
• Enable LDO x, where x=1-5: The output can be disabled by unchecking the box.
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Figure 5. LDO Section
4.5 ADC
This section is used to control the functions of the ADC (see Figure 6).
MODE:
• Repeat/Non-Repeat (bullet): Continuous conversions or a single conversion
• Start Conversion: Click on button to start single or continuous conversions.
• Stop Conversion (shown when Repeat is selected): Stops continuous conversions
• Delay (Pulldown window): Select 1 of 4 delays between conversions.
External Signal Trigger (GPIO3 Input Trigger for Data Conversion)
• External Trigger Enable (box): Check box to use the GPIO3 input as a trigger to initiate
conversions; otherwise, initiation can be done manually.
• GPIO3 Input (drop-down window): Select Falling or Rising trigger edge.
• Hold Off Enable (Box): If box is checked, then when GPIO3 input signal goes inactive (opposite of
what is selected), the data collection is put on hold and then continues once the GPIO3 input signal
goes active again. This allows a certain sample size to be collected over a controlled time frame.
Reference
• Internal Reference of 2.535 VDC, which is maximum scale for Analog 1 through 5. Analog 6
through 8 are scaled up by a factor of 1.854 because the input to the ADC was divided down by
this factor. Analog 1 and 2 are the only user-defined external inputs.
• External: Maximum value of 3.5 V; the resolution is based on the external value instead of the
internal value and is otherwise similar to the operation previously described.
Analog ½ Current Set (pulldown window): Select 1 of 4 current sources.
Data Conversions/Control Block/ADC Reading– Continuous and Single
There is a Repeat Mode and a Non-Repeat mode. For best results, use the following steps:
Non-Repeat mode
1. Select Non-Repeat mode.
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2. Select Input Channel – eight choices from pulldown window.
3. Select ADC_LO and ADC_HI alarm thresholds – Default settings programmed in EVM software
are used unless updated in window.
4. Select Sampling mode – eight choices in pulldown window between 1 and 256.
5. Select Wait between conversions time – 16 choices in pulldown window between 0 ms and
20.48 ms.
6. Click on Start Conversions button.
Once the ADC is done, it displays the four types of ADC readings available.
Repeat mode
1. Select Repeat mode.
2. Select Delay time.
3. Select Input Channel – eight choices from pulldown window.
4. Select ADC_LO and ADC_HI alarm thresholds – Default settings programmed in EVM software
are used unless updated in window.
5. Select Sampling mode – eight choices in pulldown window between 1 and 256.
6. Select Wait between conversions time – 16 choices in pulldown window between 0 ms and
20.48 ms.
7. Click on Start Conversions button. When the conversion is stopped after a single conversion or
an alarm fault, there is an LED Acknowledgment for either the ADC Done, the ADC_HI, or
ADC_LO.
8. Allow the ADC to perform conversions for the time desired, and then click on the Stop
Conversions button or if an ADC_HI or ADC_LO alarms is detected, the conversion stops
automatically, indicating a High or Low Alarm and will display the ADC readings. Note that if the
data collection is interrupted by an alarm fault, the average value is likely wrong, on multiple
data samples, because the unread data points are zero.
9. Click on Stop Conversions button when you are ready to read from the ADC. Once the ADC is
done with is current conversion, it displays the four ADC readings.
Figure 6. Analog to Digital Converter Section
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4.6 PWM/RGB
This section is used to control the PWM and the RGB drivers (see Figure 7).
PWM Drivers
• Frequency (pulldown window): Select from eight frequencies between 500 Hz and 15,600 Hz
• Duty Cycle (pulldown window): Select from 16 duty cycles between 6.25% and 100%. The PWM is
an open drain and requires an external pullup resistor. A 10% duty cycle pulls the signal low 10% of
the period T (t=1/f).
• Enable (box): Check box to enable signal.
LED PWM Drivers
• Pattern Repeat Frequency: To understand the repeat frequency, set the duty cycle to 0.4% and
look at with scope. You should see one pulse per period (122/183 Hz). If the duty cycle is set to
0.8%, there will be two pulses per period and so on, so the repeat pattern is within the selected
period (1/122=8.2 ms or 1/183=5.5 ms).
• Duty Cycle (window): You can enter a duty cycle from 0% to 100%. The number entered is updated
to the closest value from a list of 256 equal step values.
RGB Driver
• Common Flash Period (pulldown window): Select from 15 values from 1- to 8-second flash period
or continuous.
• Common on time (pulldown window): Select from eight values from 0.1-to-0.6 second for LED(s) on
time.
• Phase Delay (pulldown window): During the common on time, the color selected is in phase with
red; the other color is out of phase with red. You must observe with the scope because this is not
typically visible with the eye.
• Open Loop Current (pulldown window): Select from four constant-current levels from 0 mA to 12
mA. You can visualize the change but is hard to see with the scope because the change in voltage
drop across the LED due to the change in current, from 4 mA to 12 mA, is small.
• Red/Green/Blue Intensity (windows): You can enter a duty cycle from 0% to 100%. The number
entered is updated to the closest value from a list of 32 equal step values.
• RGB Enable (box): Check this box to enable RGB LEDs. Note that the Open Loop Current level
and Red/Green/Blue Intensity values have to be something other than zero for the LEDs to light.
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Figure 7. PWM Drivers and RGB Drivers Section
4.7 Register Map
This section contains the full register map of the TPS65800/810/820/825 (see Figure 8). The scan reads
through all the registers. Registers that permit writes can be written by selecting the corresponding Data
(HEX) grid and writing the desired data in hexadecimal format (i.e., 5F).
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Figure 8. Register Map Section
4.8 GPIOs/Mask CTRL
For the following GPIO/Mask CTRL descriptions, see Figure 9.
GPIO1
Function (pulldown window): Defines if the GPIO1 is an input or output.
If set as an input, the GPIO1 input signal can be set to control the:
1. Enable of SM1 Buck Converter (see SM1/SM2/SM3 tab),
2. Enable Standby of SM1/SM2 Buck Converters (see SM1/SM2/SM3 tab), or
3. The INT output pin and the GPIO1 LED.
If set as an output, the Output Level pulldown window appears, and GPIO1 is set according to the
Output Level pulldown window.
Output Level (pulldown window): Select High or Low to set the level of the GPIO1 output pin (only
available if GPIO1 is set as an output).
GPIO1 Interrupt Source (box): Check box if you want a GPIO1 input signal to toggle the INT pin and
turn on the Acknowledge LED (stays on momentarily until it is read). Only available if GPIO1 is set as
an input.
Interrupt Edge (pulldown window): Choose Rising or Falling Edge for triggering GPIO1 input interrupt
(only available if GPIO1 is set as an input).
GPIO2
Function (pulldown window): Defines if the GPIO2 is an input or output
If set as an input, the GPIO2 input signal can be set to control the:
1. Enable of SM2 Buck Converter (see SM1/SM2/SM3 tab), or
2. The INT output pin and the GPIO2 LED.
If set as an output, the Output Level pulldown window appears and GPIO2 is set according to the
Output Level pulldown window.
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Output Level (pulldown window): Select High or Low to set the level of the GPIO2 output pin (only
available if GPIO2 is set as an output).
GPIO2 Interrupt Source (box): Check box if you want a GPIO2 input signal to toggle the INT pin and
turn on the Acknowledge LED (stays on momentarily until it is read). Only available if GPIO2 is set as
an input.
Interrupt Edge (pulldown window): Choose Rising or Falling Edge for triggering GPIO2 input interrupt
(only available if GPIO2 is set as an input).
GPIO3
Function (pulldown window): Defines if the GPIO3 is an input or output.
If set as an input, the GPIO3 input signal triggers the data conversion routine (see SM1/SM2/SM3 tab).
If set as an output, the Output Level pulldown window appears and GPIO3 is set according to the
Output Level pulldown window.
Output Level (pulldown window): Select High or Low to set the level of the GPIO3 output pin (Only
available if GPIO3 is set as an output).
Mask INT Interrupts
Sixteen signals are monitored by the ADC for fault conditions, and on detection of a fault, the ADC
toggles the INT pin. If the box of a particular signal is checked (masked), the reporting of that fault via
the INT pin is disabled.
Sleep Mode Settings
The ADC can be put in sleep mode by a fault (voltage out of range) of any one of the eight power
output signals. Check the box(s) for the signal(s) that should put the ADC in sleep mode when in fault
status.
Figure 9. GPIO and Mask Control Section
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5 Interrupts Software LEDs
This section describes the values of the bits contained in INT_ACK1 and INT_ACK2 registers. The
INT_ACK1 contains the Power Good interrupts and INT_ACK2 contains acknowledgment of interrupts due
to events or change of status. Given that the acknowledgments are cleared in the IC once read, the
evaluation software manipulates the acknowledgments so that the user can be aware of events that have
occurred. So, if an acknowledgment is set in the software, it may not represent the true time value of the
corresponding bit.
Power Good – These are set if a power-good interrupt occurs caused by any of the following being out of
range:
• SM1, SM2, SM3
• LDO1, LDO2, LDO3, LDO4, and LDO5
Acknowledge – These are set if any of the following events occur:
• ADC DONE – It is set whenever the ADC has completed conversion without violating the ADC_HI or
ADC_LO thresholds. To clear the lit LED, click on LED. When operating the software from the ADC
section, the software clears the lit LED automatically whenever a conversion is initiated. Given that the
event that sets this bit is instantaneous, the software clears the corresponding LED after a user’s
acknowledgment (click on LED) or to initialize a conversion.
• BAT_ID_DET – It is set if an external ID resistor that is in battery pack is detected at ANALOG 1 input.
• GPIO_1 – If GPIO1 is set as an input, and the GPIO1 INT SOURCE bit is set, then the GPIO_1
Acknowledgment LED toggles for each time that the GPIO1 pin detects a falling edge (in the case that
the GPIO is set for falling edge) or a rising edge (in the case that the GPIO is set for rising edge).
• GPIO_2– If GPIO2 is set as an input, and the GPIO2 INT SOURCE bit is set, then the GPIO_2
Acknowledgment LED toggles for each time that the GPIO2 pin detects a falling edge (in the case that
the GPIO is set for falling edge) or a rising edge (in the case that the GPIO is set for rising edge).
• Thermal_Fault – If the IC internal temperature reaches ~155°C, the thermal Fault LED turns on.
• Charge Status Change – This bit indicates that the status of the charging has change from one of the
following states to another state: precharge, fastcharge, charge pending, and charge done.
• ADC_HI – It is set whenever the ADC conversions are terminated due to exceeding ADC_HI
thresholds. To clear the lit LED, click on LED. When operating the software from the ADC section, the
software clears the LED automatically whenever a conversion is initiated. Given that the event that
sets this bit is instantaneous, the software clears the corresponding LED after a user’s
acknowledgment (click on LED) or to initialize a conversion.
• ADC_LO – It is set whenever the ADC conversions are terminated due to measurements captured by
the ADC being lower than the ADC_LO threshold. To clear the lit LED, click on LED. When operating
the software from the ADC section, the software clears the LED automatically whenever a conversion
is initiated. Given that the event that sets this bit is instantaneous, the software clears the
corresponding LED after a user’s acknowledgment (click on LED) or to initialize a conversion.
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6 Physical Layouts
This section contains the board layout, assembly drawings for the EVM, bill of materials, and the
schematics. Only the TPS65800/810EVM layout is shown. The TPS65820/825 is identical except for the
reduced package size of the TPS65820/825 IC.
6.1 Board Layouts
Figure 10. Board Layout Top Layer
Figure 11. Board Layout Layer 2
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Figure 12. Board Layout Layer 3
Figure 13. Board Layout Bottom Layer
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Figure 14. Board Layout Top Assembly Layer
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