| Number of series cells | 1, 2, 3, 4, 5 |
| Charge current (Max) (A) | 16.2 |
| Operating Vin (Max) (V) | 26 |
| Cell chemistry | Lead Acid, Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH, SuperCap |
| Battery charge voltage (Min) (V) | 1.024 |
| Battery charge voltage (Max) (V) | 23 |
| Absolute Vin (safety rating) (Max) ((V)) | 32 |
| Control interface | I2C |
| Features | IC thermal regulation, ICO (Input Current Optimization), IINDPM (Input current limit), Input OVP, Integrated ADC, Power Path, USB C/PD compatible, USB OTG integrated, VINDPM (Input voltage threshold to maximize adaptor power) |
| Operating Vin (Min) (V) | 3.5 |
| Rating | Catalog |
- Power path control through battery MOSFET implementing independent system voltage instant-on with no battery or depleted battery
- 400-kHz/800-kHz programmable switching frequency for high efficiency/high power density
- Buck-boost narrow voltage DC (NVDC) charger for USB-C Power Delivery (PD) interface platform
- 3.5-V to 26-V input range to charge 1- to 5-cell battery
- Charge current up to 16.2 A/8.1 A with 128-mA/64-mA resolution based on 5-mΩ/10-mΩ sensing resistor
- Input current limit up to 10 A/6.35 A with 100-mA/50-mA resolution based on 5-mΩ/10-mΩ sensing resistor
- Support USB 2.0, USB 3.0, USB 3.1 and USB Power Delivery (PD)
- Input Current Optimizer (ICO) to extract max input power without overloading the adapter
- Seamless transition between buck, buck-boost, and boost operations
- Input current and voltage regulation (IINDPM and VINDPM) against source overload
- TI patented switching frequency dithering pattern for EMI noise reduction
- TI patented Pass Through Mode (PTM) for system power efficiency improvement and battery fast charging achieving 99% efficiency.
- Input and battery current monitor through dedicated pins
- Integrated 8-bit ADC to monitor voltage, current and power
- Battery MOSFET ideal diode operation in supplement mode to support system when adapter is fully loaded
- Power up USB port from battery (USB OTG)
- 3-V to 24-V OTG with 8-mV resolution
- Output current limit up to 12.7 A/6.35 A with 100-mA/50-mA resolution based on 5-mΩ/10-mΩ sensing resistor
- I2C host control interface for flexible system configuration
- High accuracy for the regulation and monitor
- ±0.5% Charge voltage regulation
- ±3% Charge current regulation
- ±2.5% Input current regulation
- ±2% Input/charge current monitor
- Safety
- Thermal shutdown
- Input, system, battery overvoltage protection
- Input, MOSFET, inductor overcurrent protection
- Package: 32-Pin 4.0 mm × 4.0 mm WQFN
The BQ25730 is a synchronous NVDC buck-boost battery charge controller to charge a 1- to 5-cell battery from a wide range of input sources including USB adapter, high voltage USB-C Power Delivery (PD) sources, and traditional adapters. It offers a low component count, high efficiency solution for space constrained, 1- to 5-cell battery charging applications. The Narrow VDC buck-boost architecture avoid direct power path from input source to system voltage which implements wide input voltage range and narrow system voltage range at same time. Narrow system voltage range is valuable for faster battery supplement and lower MOSFET rating for next stage converter.