BQ25756E系列介绍资料

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BQ25756E

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Standalone or I2C contrStand-alone or I²C-controlled bidirectional buck-boost charge controller f

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The BQ25756E is a wide input voltage, switched-mode buck-boost Li-Ion, Li-polymer, or LiFePO 4 battery charge controller with bidirectional power flow support. The device offers high-efficiency battery charging over a wide voltage range with accurate charge current and charge voltage regulation, in addition to automatic charge preconditioning, termination, and charge status indication. The device integrates all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use. In reverse mode, the device draws power from the battery and regulates the input terminal voltage with an added constant current limit for protection, supporting USB-PD EPR power profile.

Besides the I 2C host-controlled charging mode, the device also supports standalone charging mode via resistor programmable limits. Input current, charge current and charge voltage regulation targets can be set via the ILIM_HIZ, ICHG and FB pins, respectively.

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 LiFePO 4 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 (R AC_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
I 2C 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
- 36-pin 5 mm × 6 mm QFN

Number of series cells	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16
Charge current (max) (A)	20
Vin (max) (V)	60
Cell chemistry	Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiMH, SuperCap
Battery charge voltage (min) (V)	0
Battery charge voltage (max) (V)	36
Absolute max Vin (max) (V)	60
Control topology	Switch-Mode Buck-boost
Control interface	I2C
Features	Adjustable switching frequency, BAT temp thermistor monitoring (JEITA profile), Bidirectional, IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Integrated LDO, SYNC Pin, Solar input/MPPT, USB C/PD compatible, VINDPM (Input voltage threshold to maximize adaptor power)
Vin (min) (V)	0
Rating	Catalog
Operating temperature range (°C)	-40 to 85

VQFN (RRV)

30 mm² 6 x 5

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BQ25756E

Standalone or I2C contrStand-alone or I²C-controlled bidirectional buck-boost charge controller f

4000-306-326