BQ25155YFPR

1 Features 

· Linear battery charger with 1.25-mA to 500-mA fast charge current range

 -0.5% Accurate 12C programmable battery regulation voltage ranging from 3.6V to 4.6V in 10-mV steps

 -Configurable termination current supporting down to 0.5mA

 -20-VTolerant input with typical 3.4-V to 5.5-V input voltage operating range 

 -Programmable thermal charging profile, fuly configurable hot, warm, cool and cold thresholds 

· PowerPath management for powering system and charging battery

 -I2C Programmable regulated system voltage (PMID) ranging from 4.4V to 4.9V in addition tobattery voltage tracking and Input pass-though options

 -Dynamic power path management optimizes charging from weak adapters

 -Advanced IC control allows host to disconnect the battery or adapter as needed

· I2C Configurable load switch or up to 150-mA LDO output

 -Programmable range from 0.6 V to 3.7 Vin 100-mV steps

· Utra low lddq for extended battery life

 -10-nA Ship mode battery lq

 -400-nA lq While powering the system(PMID and VDD on)

· One push-button wake-up and reset input with adjustable timers

 -Supports system power cycle and HW reset

· 16-Bit ADC

 -Monitoring of charge current, battery thermistor and battery, input and system(PMID) voltages

 -General purpose ADC input

· Always on 1.8-V VDD LDO supporting loads up to 10mA

· 20-Pin 2-mm×1.6-mm CSP package

· 12-mm2Total solution size

2 Applications

· Headsets, earbuds and hearing aids

· Smart watches and smart trackers

· Wearable fitness & activity monitors

· Blood glucose monitors

3 Description 

The BQ25155 is a highly integrated battery charge management IC that integrates the most common functions for wearable and portable devices, namely a charger,a regulated output voltage rail for system power, ADC for battery and system monitoring,a LDO, and push-button controller.

The BQ25155 IC integrates a linear charger with PowerPath that enables quick and accurate charging for small batteries while providing a regulated voltage to the system. The regulated system voltage(PMID) output may be configured through IC based on the recommended operating condition of downstream IC's and system loads for optimal system operation.

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