BQ25756E Series
Stand-alone or I²C-controlled bidirectional buck-boost charge controller for up to 7S batteries
Manufacturer: Texas Instruments
Link to Manufacturer Page: https://www.ti.com/
Catalog
Stand-alone or I²C-controlled bidirectional buck-boost charge controller for up to 7S batteries
| Part | Package / Case | Fault Protection | Current - Charging | Charge Current - Max [Max] | Battery Chemistry | Interface | Mounting Type | Battery Pack Voltage [Max] | Programmable Features | Voltage - Supply (Max) [Max] | Number of Cells [Min] | Number of Cells [Max] | Operating Temperature [Min] | Operating Temperature [Max] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ25756ERRVR | 36-VFQFN Exposed Pad | Over Current, Over Temperature, Over-Under Voltage, Short Circuit | Constant - Programmable | 20 A | Multi-Chemistry | I2C | Surface Mount | 36 V | Current, Timer, Voltage | 36 V | 1 | 7 | -40 °C | 85 °C |
Key Features
• Wide input voltage operating range: 4.2 V to 36 VWide battery voltage operating range: up-to 36 V with multi-chemistry support:1- to 7-cell Li-ion charge profile1- to 9-cell LiFePO 4 charge profileSynchronous buck-boost charge controller with NFET driversAdjustable switching frequency from 200 kHz to 600 kHzOptional synchronization to external clockIntegrated loop compensation with soft startOptional gate driver supply input for optimized efficiencyAutomatic maximum power point tracking (MPPT) for solar chargingBidirectional 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/stepAdjustable input current regulation (R AC_SNS) from 400 mA to 20 A with 50-mA/step using 5-mΩ resistorHigh accuracy±0.5% charge voltage regulation±3% charge current regulation±3% input current regulationI 2C controlled for optimal system performance with resistor-programmable optionHardware adjustable input and output current limitsIntegrated 16-bit ADC for voltage, current, and temperature monitoringHigh safety integrationAdjustable input overvoltage and undervoltage protectionBattery overvoltage and overcurrent protectionCharging safety timerBattery short protectionThermal shutdownStatus outputsAdapter present status ( PG)Charger operation status (STAT1, STAT2)Package36-pin 5 mm × 6 mm QFNWide input voltage operating range: 4.2 V to 36 VWide battery voltage operating range: up-to 36 V with multi-chemistry support:1- to 7-cell Li-ion charge profile1- to 9-cell LiFePO 4 charge profileSynchronous buck-boost charge controller with NFET driversAdjustable switching frequency from 200 kHz to 600 kHzOptional synchronization to external clockIntegrated loop compensation with soft startOptional gate driver supply input for optimized efficiencyAutomatic maximum power point tracking (MPPT) for solar chargingBidirectional 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/stepAdjustable input current regulation (R AC_SNS) from 400 mA to 20 A with 50-mA/step using 5-mΩ resistorHigh accuracy±0.5% charge voltage regulation±3% charge current regulation±3% input current regulationI 2C controlled for optimal system performance with resistor-programmable optionHardware adjustable input and output current limitsIntegrated 16-bit ADC for voltage, current, and temperature monitoringHigh safety integrationAdjustable input overvoltage and undervoltage protectionBattery overvoltage and overcurrent protectionCharging safety timerBattery short protectionThermal shutdownStatus outputsAdapter present status ( PG)Charger operation status (STAT1, STAT2)Package36-pin 5 mm × 6 mm QFN
Description
AI
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.
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.