Texas Instruments BQ25710EVM-017, BQ25713EVM-017 User Manual
User's Guide
SLUUBT8A–June 2018–Revised July 2018
BQ2571x Evaluation Module
The BQ25710EVM-017 and BQ25713EVM-017 evaluation modules (EVM) are SMBus or I2C-controlled
NVDC-1 buck boost charger. The input voltage range is between 3.5 V and 24 V, with a programmable
output of 1–4 cells and a charge output current range of 64 mA to 8.128 A. This EVM does not include the
EV2400 interface device; the EV2400 must be ordered separately to evaluate the BQ2571x EVM.
Contents
1 Introduction ................................................................................................................... 2
1.1 EVM Features....................................................................................................... 2
1.2 General Description ................................................................................................ 2
2 Test Summary................................................................................................................ 5
2.1 Definitions............................................................................................................ 5
2.2 Equipment ........................................................................................................... 5
2.3 Equipment Setup.................................................................................................... 6
2.4 Procedure............................................................................................................ 9
3 Bill of Materials, Board Layout, and Schematics....................................................................... 10
3.1 Bill of Materials .................................................................................................... 10
3.2 Board Assembly Layout .......................................................................................... 13
3.3 Schematic .......................................................................................................... 15
1 EV2400 Connections........................................................................................................ 6
2 Original Test Setup for BMS017 (BQ2571x EVM) ...................................................................... 7
3 Main Window of the BQ2571x Evaluation Software .................................................................... 8
4 EN_OTG ...................................................................................................................... 9
5 Top Assembly............................................................................................................... 13
6 Bottom Assembly........................................................................................................... 14
7 BQ2571x EVM Schematic ................................................................................................ 15
1 I/O Description ............................................................................................................... 3
2 Controls and Key Parameters Setting .................................................................................... 3
3 Recommended Operating Conditions..................................................................................... 4
4 BQ2571x EVM Bill of Materials........................................................................................... 10
Trademarks
USB Type-C is a trademark of USB Implementer's Forum, Inc..
All other trademarks are the property of their respective owners.
List of Figures
List of Tables
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Introduction
1 Introduction
1.1 EVM Features
This EVM supports the following features:
• Evaluation module for the BQ2571x devices
• Supports 3.5- to 24-V input source
– 3.5- to 24-V, 0- to 6-A input operating range and 1–4 cell battery configuration
– Supports USB2.0, USB 3.0, USB 3.1 (USB Type-C™) and USB_PD
– Supports USB OTG with 3- to 20.8-V adjustable output
– Maximum Power Tracking by Input Voltage and Current Regulation
• Narrow VDC (NVDC) power path management
– Instant-on works with no battery or deeply discharged battery (PG1.0 needs charge-enable
command)
– Battery supplements system when adapter is fully-loaded
• 800-kHz or 1.2-MHz switching frequency for low profile inductor
• SMBus (BQ25710) or I2C (BQ25713) port for optimal system performance and status reporting
• Power and Current Monitor for CPU Throttling
• Safety
– Thermal shutdown
– Input and system overvoltage protection
– MOSFET overcurrent protection
• Accelerate charge time by battery path impedance compensation
• Charge status outputs for LED or host processor
• Maximum power tracking capability by input voltage regulation
• Test points for key signals available for testing purposes. Easy probe hook-up.
• Jumpers available. Easy-to-change connections.
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1.2 General Description
The BQ2571x evaluation modules are complete charger modules for evaluating an SMBUS or I2Ccontrolled buck boost charge using the BQ2571x devices.
The BQ2571x EVM does not include the EV2400 interface board. To evaluate the BQ2571x EVM, order
an EV2400 interface board separately.
The BQ2571x is a synchronous NVDC-1 battery buck boost charge controller, offering a low component
count, high efficiency solution for space-constrained, multi-chemistry battery charging applications.
The NVDC-1 configuration allows the system to be regulated at the battery voltage, but not drop below the
system minimum voltage. The system keeps operating even when the battery is completely discharged or
removed. When load power exceeds the input source rating, the battery supplement mode prevents the
input source from being overloaded.
The BQ2571x charges the battery from a wide range of input sources including a 5-V USB adapter to a
high-voltage USB PD source and traditional adapters.
During power up, the charger sets the converter to buck, boost, or buck-boost configuration based on the
input source and battery conditions. During the charging cycle, the charger automatically transits among
buck, boost, and buck-boost configuration without host control.
The BQ2571x monitors adapter current, battery current, and system power. The flexibly programmed
PROCHOT output goes directly to the CPU for throttle back, when needed.
For more details on register functions, see the data sheets – BQ25710 (SLUSD20) and BQ25713
(SLUSD83).
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Table 1 lists the I/O descriptions.
Introduction
Table 1. I/O Description
Jack Description
J1–VIN Input: positive terminal
J1–GND Input: negative terminal (ground terminal)
J2-ILIM_control External converter disable; logic high to pull the ILIM pin down
J2-CHRG_OK CHRG_OK output
J2-ENZ_OTG External OTG disable pin
J2-CELL_control External battery removal control; logic high to pull the CELL pin down
J3–3V3 Onboard 3.3-V output
J3–SDA SMBUS or I2C SDA
J3-SCL SMBUS or I2C SCL
J3-GND Ground
J4-CMPOUT CMPOUT pin output
J4-GND Ground
J4-CMPIN External CMPIN pin input
J5-BAT Connected to battery pack output
J5-GND Ground
J6-SYS Connected to system output
J6-GND Ground
Table 2 displays the controls and key parameters settings.
Table 2. Controls and Key Parameters Setting
Jack Description Factory Setting
JP1
JP7
JP2
JP3
JP4
JP5 Jumper on: Pre-bias ILIM_HIZ
JP6 For input current setting:
JP8 Jumper on: On-board LDO to drive the EVM 3V3
Inrush control setting:
spa1. Bypass inrush control circuit
spa1. JP1 on: bypasses input FETs Q9 and Q10 external selector spa1.
spa1. JP7 top two connection (pin 2 is connected to pin 3): VBUS pin on ACP
spa2. Enable inrush control circuit
spa2. JP1 off: CHRG_OK controls Q9 and Q10 external selector
spa2. JP7 bottom two connection: VBUS pin on V
CELL setting:
spa1S: JP2, JP3, JP4 all open, measure CELL pin voltage 1.2 V
spa2S: JP2 closed, JP3 and JP4 open, measure CELL pin voltage 2.7 V
spa3S: JP3 closed, JP2 and JP4 open, measure CELL pin voltage 3.5 V
spa4S: JP2, JP3 closed, JP4 open, measure CELL pin voltage 4.2 V Bat
sparemoval, short JP4
Jumper off: Ground ILIM_HIZ
spa Jumper on: ILIM_HIZ LOW.
spa Jumper off: Allow pre-bias ILIM_HIZ
Jumper off: disconnect on-board LDO to drive the EVM 3V3
IN
Bypass inrush control circuit:
spaJP1 installed
spaJP7 top two position installed
spa(pin2 is connected pin3)
2S setting: JP2 installed JP3, JP4 all
open
Installed
Not installed
Installed
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Introduction
Table 3 lists the recommended operating conditions.
Symbol Description MIN TYP MAX Unit
Supply voltage, V
Battery voltage, V
Supply current, I
Output current, I
Operating junction temperature
range, T
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Table 3. Recommended Operating Conditions
IN
BAT
AC
out
J
Input voltage from ac adapter input 3.5 5/12/19 24 V
Voltage applied at VBAT terminal 0 19.2 V
Maximum input current from ac adapter
0 3 A
input
Output current 0 8 A
0 125 °C
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2 Test Summary
2.1 Definitions
This procedure details how to configure the BMS017 evaluation board. For the test procedure, the
following naming conventions are followed. Refer to the PWR732 schematic for details.
VXXX: External voltage supply name (VADP, VBT, VSBT)
LOADW: External load name (LOADR, LOADI)
V(TPyyy): Voltage at internal test point TPyyy. For example, V(TP12) means the
V(Jxx): Voltage at jack terminal Jxx.
V(TP(XXX)): Voltage at test point “XXX”. For example, V(ACDET) means the voltage at
V(XXX, YYY): Voltage across point XXX and YYY.
I(JXX(YYY)): Current going out from the YYY terminal of jack XX.
Jxx(BBB): Terminal or pin BBB of jack xx
Jxx ON : Internal jumper Jxx terminals are shorted
Jxx OFF: Internal jumper Jxx terminals are open
Jxx (-YY-) ON: Internal jumper Jxx adjacent terminals marked as “YY” are shorted
Measure: → A,B Check specified parameters A, B. If measured values are not within
Observe → A,B Observe if A, B occurs. If they do not occur, the unit under test has failed.
Test Summary
voltage at TP12.
the test point which is marked as “ACDET”.
specified limits, the unit under test has failed.
Assembly drawings have locations for jumpers, test points, and individual components.
2.2 Equipment
The following list of equipment is required for fully testing the EVM:
1. Power Supplies
A power supply capable of supplying 24 V at 6 A is required. While this part can handle larger voltage
and current, it is not necessary for this procedure.
2. Load #1
A 0- to 20-V/0- to 6-A, system DC electronic load and setting as constant voltage load mode.
3. Load #2
A Kepco load: BOP36-6M, DC 0 to ±36 V, 0 to ±6 A (or higher), or equivalent.
4. Meters
Six Fluke 75 multimeters, (equivalent or better) or: Four equivalent voltage meters and two equivalent
current meters.
5. Computer
A computer with at least one USB port and a USB cable.
6. EV2400 Communication Kit
7. Software
Download and properly install BQstudio (Version: 1.3.85 or newer) from
http://www.ti.com/tool/BQstudio.
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Test Summary
2.3 Equipment Setup
Use the following guidelines to set up the equipment:
1. Set power supply #1 for 10-V DC, 5-A current limit and then turn off the supply.
2. Connect the output of power supply #1 in series with a current meter to J1 (VIN and GND).
3. Connect a voltage meter across J1 (VIN) and J1 (GND).
4. Connect load #1 in series with a current meter to J6 (VSYS and GND). Connect a voltage meter
across J6 (VSYS and GND). Set 1 A at the constant current mode. Turn off load #1.
5. Connect Load #2 in series with a current meter to J5 (VBAT and GND). Connect a voltage meter
across J5 (VBAT and GND). Set 7 V at KEPCO load output. Turn off Load #2.
NOTE: Add a 47-µF capacitor on the BAT pin when testing without real battery.
6. Connect J3 to the EV2400. Connect J3 to the SMBus PORT 1 (BQ25710) or I2C PORT 2 (BQ25713)
on the EV2400. The connections are shown in Figure 1.
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The picture shows the SMBus version EVM connection. If using the BQ25713EVM-017, move the connector to the
I2C port.
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BQ2571x Evaluation Module
Figure 1. EV2400 Connections
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7. Install jumpers as “JUMPER SET UP”.
Test Summary
After completing these steps , the test setup for BMS017 is as shown in Figure 2.
Figure 2. Original Test Setup for BMS017 (BQ2571x EVM)
8. Turn on the computer and power supply #1. Open the BQstudio software.
a. Select Charger and click the Next button.
b. For SMBus BQ25710, select “Charger_1_00-BQ25710SMB.BQz” on the Select a Target Page. For
I2C BQ25713, select “Charger_1_00-BQ25713I2C.BQz” on the Select a Target Page.
c. After selecting the target device, change “update mode” from “immediate” to “manual”, click “Read
Register” and the following interface is presented.
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