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Data Sheet
BQ25756E: Standalone/I2C Controlled, 1- to 7-Cell
Bidirectional Buck-Boost Battery Charge Controller
1 Features
- Wide input voltage operating range: 4.2 V to 36 V
- Wide battery voltage operating range: up-to 36 V with multi-chemistry support:
- 1- to 7-cell Li-ion charge profile
- 1- to 9-cell LiFePO4
charge profile
- Synchronous buck-boost charge controller with
NFET drivers
- Adjustable switching frequency from
200 kHz to 600 kHz
- Optional synchronization to external
clock
- Integrated loop compensation with
soft start
- Optional gate driver supply input for
optimized efficiency
- Automatic maximum power point tracking
(MPPT) for solar charging
- Bidirectional converter operation (Reverse Mode)
supporting USB-PD Extended Power Range (EPR)
- Adjustable input voltage (VAC) regulation from 3.3 V to 36 V with 20-mV/step
- Adjustable input current regulation (RAC_SNS) from 400 mA to 20 A with
50-mA/step using 5-mΩ resistor
- High accuracy
- ±0.5% charge
voltage
regulation
- ±3% charge current regulation
- ±3% input current regulation
- I2C controlled for optimal system performance with resistor-programmable
option
- Hardware adjustable input and output
current limits
- Integrated 16-bit ADC for
voltage, current, and temperature monitoring
- High safety integration
- Adjustable input overvoltage and
undervoltage protection
- Battery
overvoltage and overcurrent protection
- Charging safety timer
- Battery short protection
- Thermal shutdown
- Status outputs
- Adapter present status
(PG)
- Charger
operation status (STAT1,
STAT2)
- Package