BQ21088数据手册TI中文资料规格书

描述 Description

The BQ21088 is a linear battery charger IC focusing on small solution size and low quiescent current for extending battery life. The device is available in an 8-ball chipscale package which does not need HDI PCB process for fabrication thereby reducing the PCB cost. The device can support up to 1A charging and system loads of up to 3A.

The battery is charged using a standard Li-ion or LiFePO4 charge profile with three phases: precharge, constant current and constant voltage. Thermal regulation provides the maximum charge current while managing the device temperature. The charger is also optimized for battery to battery charging with 3V minimum input voltage operation and can withstand 25V absolute maximum line transients. The device integrates a single push-button input to reduce the total solution footprint.

特性 Features

1A linear battery charger

3.0V to 5.5V input voltage operating range for battery-to-battery charging and USB adapters

Configurable battery regulation voltage with 0.5% accuracy from 3.6V to 4.65V in 10mV steps

Li-ion, Li-Poly, and LiFePO4 chemistries support

5mA to 1A configurable fast charge current

55mΩ battery FET ON resistance

Up to 3A discharge current to support high system loads

Configurable NTC charging profile thresholds including JEITA support



Power path management for powering the system and charging the battery

Regulated system voltage (SYS) ranging from 4.4V to 4.9V addition to battery voltage tracking and input pass-though options

Battery Tracking input voltage dynamic power management (VINDPM) for high impedance input sources





Ultra low quiescent current

4µA in Battery Only mode

30µA Input adapter Iq in sleep mode



One push-button wake-up and reset input

Integrated fault protection

Input overvoltage protection (VIN_OVP)

Battery short protection (BATSC)

Battery overcurrent protection (BATOCP)

Input current limit protection (ILIM)

Thermal regulation (TREG) and thermal shutdown (TSHUT)

Battery thermal fault protection (TS)

Watchdog and safety timer fault