BQ25756RRVR
Battery Chargers
Technical Specifications
| Type | Description |
|---|---|
| Working Voltage V | 37.1 V |
| Iq A | 1.7e-05 |
| End-Off Voltage | - |
| Number of Cells | 1~14 |
| Battery Temperature Detection | Support |
| 0V Battery Charge | - |
| Type of Battery | Lithium Battery;LiFePO4 Battery |
| The Chip Type | Charging IC |
| Type | Description |
|---|---|
| Balance Current | - |
| Charge Current - Max | 20A |
| Charging Saturation Voltage | - |
| Operating Temp | -40°C ~ +125°C |
| Interface | I2C |
| Features | Constant current charging;Constant voltage charging;Trickle charging;Automatic recharge;Charge termination;Programmable charging current;Overcurrent Protection;Overvoltage protection;Soft-start |
| Package / Case | VQFN-36 |
Product Introduction
The BQ25756 is a wide-input-voltage, switch-mode buck/boost lithium-ion, lithium-polymer, or lithium-iron-phosphate battery charging controller with bidirectional power flow support. This device not only provides precise charging current and charging voltage regulation but also offers automatic pre-charging regulation, charging termination, and charging status indication, enabling efficient battery charging over a wide voltage range. The device integrates all loop compensation functions of the buck/boost converter, thus providing an easy-to-use, high-density solution. In reverse mode, the device draws power from the battery and regulates the input terminal voltage through an added constant current loop to achieve protection, thereby supporting USB-PD EPR power profiles. In addition to the I2C host-controlled charging mode, the device also supports an independent charging mode through resistor-programmable limits. The input current, charging current, and charging voltage regulation targets can be set via the ILIM_HIZ, ICHG, and FB pins respectively.
Features
- Wide battery voltage operating range: up to 70V, supporting multi-chemistry batteries: 1-cell to 14-cell Li-ion charging profile, 1-cell to 16-cell LiFePO₄ charging profile
- Synchronous buck/boost charging controller with NFET drivers
- Adjustable switching frequency: 200kHz to 600kHz
- Optional external clock synchronization
- Integrated loop compensation with soft-start
- Optional gate driver supply input for improved efficiency
- Automatic MPPT for solar charging
- Buck-only mode
- Bidirectional converter operation (reverse mode) supporting USB-PD EPR
- Adjustable input voltage (VAC) regulation range: 3.3V to 65V in 20mV steps
- Adjustable input current regulation (RAC_SNS) using 5mΩ resistor: 400mA to 20A in 50mA steps
- ±0.5% charge voltage regulation
- ±3% charge current regulation
- ±3% input current regulation
- I2C control for superior system performance with per-battery programmable options
- Hardware-adjustable input and output current limits
- Integrated 16-bit ADC for voltage, current, and temperature monitoring
- Adjustable input overvoltage and undervoltage protection
- Battery overvoltage and overcurrent protection
- Charge safety timer
- Battery short-circuit protection
- Thermal shutdown
- Status outputs: adapter present status (PG), charger operating status (STAT1, STAT2)
- 36-pin 5mm × 6mm QFN package
Applications
- - E-kick scooters, e-bikes - Cordless power tools, garden tools - Robotic lawn mowers - Portable power stations - Cordless vacuum cleaners, robotic vacuum cleaners - Solar chargers - USB-PD EPR (Extended Power Range)
Datasheet
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | ROHS3 |
| ECCN | EAR99 |
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| Type | Details |
|---|---|
| CAHTS | 8542390000 |
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Sourcing Information
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