Texas Instruments bq27531EVM, User Manual, Page: 4 / 27

bq27531-Based Circuit Module
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4 SLUUA90A – April 2013 – Revised July 2016
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bq27531EVM With bq27531 Battery Management Unit Impedance Track™ Fuel
Gauge and bq24192 4.5-A, Switch-Mode Battery Charger for Single-Cell
Applications
2.1 Circuit Module Connections
Contacts on the circuit module provide the following connections:
• Direct connection to the battery pack (J12): PACK+, PACK–, and TS
• To the serial communications port (J10): SDA, SCL, and VSS
• Connection to system load (J5)
• Connection to charger (J2)
• Access to signal output (J13): SOC_INT
2.2 I/O Description
Header/Terminal Block Description
J1–VIN Adapter positive terminal
J2–VIN Adapter positive terminal
J2–GND Adapter negative terminal
J3-GND Adapter negative terminal
J4-SYS System positive terminal
J5-SYS System positive terminal
J5-GND System negative terminal
J6-GND System negative terminal
J7-TEST Test terminal
J8 USB Miniconnector
J9 USBTOGPIO 10-pin connector (not installed)
J10 EV2300 connector for using bq27531 software to communicate with bq27531 IC
J11 Allows SOC_INT to be tied to external pullup rather than VCC
J12-PACK+ Battery positive terminal
J12-T Pack thermistor input that leads to IC TS pin
J12-PACK- Battery negative terminal
J12-SOC_INT SOC_INT output from gauge
2.3 Test Points
Test Point Description
TP1 bq24192 IN voltage
TP2 bq24192 PSEL pin
TP3 bq24192 PG/D- pin
TP4 bq24192 STAT pin
TP5 bq24192 SCL = bq27531 BSCL - I2C communication clock line
TP6 bq24192 SDA = bq27531 BSDA - I2C communication data line
TP7 bq24192 INT pin
TP8 bq24192 OTG pin
TP9 bq24192 CE pin
TP10 PGND
TP11 bq24192 TS1 pin
TP12 bq24192 TS2 pin
TP13 bq24192 BAT pin
TP14 PGND
TP15 bq24192 SYS pin
TP16 PGND
TP17 PGND