BQ25708 datasheet(8/94 Pages) TI2

8 / 94 page

Table 7-1. Pin Functions (continued)

I/O

DESCRIPTION

NAME

NO.

SDA

I/O

I2C open-drain data I/O. Connect to data line from the host controller or smart battery.

Connect a 10-kΩ pullup resistor according to I2C specifications.

SRN

PWR

Charge current sense resistor negative input. SRN pin is for battery voltage sensing as well.

Connect SRN pin with optional 0.1-μF ceramic capacitor to GND for common-mode filtering.

Connect a 0.1-μF ceramic capacitor from SRP to SRN to provide differential mode filtering.

The leakage current on SRP and SRN are matched.

SRP

PWR

Charge current sense resistor positive input. Connect SRP pin with optional 0.1-uF ceramic

capacitor to GND for common-mode filtering. Connect a 0.1-μF ceramic capacitor from SRP

to SRN to provide differential mode filtering. The leakage current on SRP and SRN are

matched.

SW1

PWR

Buck mode high side power MOSFET driver source. Connect to the source of the high side

n-channel MOSFET.

SW2

PWR

Boost mode high side power MOSFET driver source. Connect to the source of the high side

n-channel MOSFET.

VBUS

PWR

Charger input voltage. An input low pass filter of 1Ω and 0.47 µF (minimum) is

recommended.

VDDA

PWR

Internal reference bias pin. Connect a 10-Ω resistor from REGN to VDDA and a 1-μF

ceramic capacitor from VDDA to power ground.

VSYS

PWR

Charger system voltage sensing. The system voltage regulation limit is programmed in

REG0x05/04() and REG0X0D/0C().

Thermal pad

–

Exposed pad beneath the IC. Always solder thermal pad to the board, and have vias on

the thermal pad plane connecting to power ground planes. It serves as a thermal pad to

dissipate the heat.

BQ25713, BQ25713B

SLUSD83C – JUNE 2018 – REVISED MAY 2023

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