Datasheet

Introduction

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1.6 Control and Key Parameters Setting

Jumper Description Default Factory Setting

JP1 bq24272 only 2-3 (FET GATE = BGATE)

1-2 (FET GATE = SYS): External PFET's gate tied to SYS and therefore disabled.

2-3 (FET GATE = BGATE): External PFET's gate tied to BGATE pin and therefore

controlled by IC.

JP2 1-2 (CD = HI): Charge disable high to disable charge and enter Hi-Z mode 2-3 (CD = LO)

2-3 (CD = LO): Charge disable low for normal operation

JP4 1-2 (TS = DIS): Connects TS high to DRV and disables the temperature sense function 2-3 (TS = SIM)

on the IC

2 (JP4 Open): Connects a potentiometer to the TS so that the potentiometer can

emulate a thermistor. The potentiometer has been preset to approximately 3.4 kΩ so

that the TS voltage is 0.5 x V (DRV).

2-3 (TS = SIM): Connects the TS pin to an external thermistor. The resistor divider

formed by R1 and R3 has been sized to accommodate a 10-kΩ thermistor. If a different

thermistor is used, R1 and R3 must be resized.

1.7 Recommended Operating Conditions

Min Typ Max Unit

Supply voltage, V

Input voltage from ac adapter 4.2 10 V

System voltage, V

SYS

Voltage output at SYS terminal (bq24272 only; depends on 3.4 VBATR V

VBAT voltage and status of V

INDPM

) EG+4.17

Battery voltage, V

BAT

Voltage output at VBAT terminal (registers set via I2C 3.4 4.2 4.44 V

communication)

Supply current, I

IN(MAX)

Maximum input current from ac adapter input (registers set 1.5 2.5 A

via I2C communication)

Fast charge current, Battery charge current (registers set via I2C communication) 0.550 2.5 A

CHRG(MAX)

Operating junction temperature range, T

-40 125 °C

WCSP-Packaged bq24272/273 Evaluation Modules SLUU916–April 2012

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