Overview
The BQ25700ARSNR, produced by Texas Instruments, is a synchronous Narrow-VDC (NVDC) battery buck-boost charge controller. This device is designed to provide a low component count and high efficiency solution for multi-chemistry battery charging applications. It supports charging 1- to 4-cell batteries from a wide range of input sources, including USB adapters, high voltage USB PD sources, and traditional adapters. The BQ25700A features seamless transition between buck and boost operation, input current and voltage regulation, and comprehensive power and current monitoring. It also includes system power monitoring and processor hot monitoring, making it suitable for various portable and industrial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Operating Voltage | 3.5 - 24 | V |
| Output Voltage Range (OTG Mode) | 4.48 - 20.8 | V |
| Output Current Limit (OTG Mode) | Up to 6.35 | A |
| Switching Frequency | 800 kHz or 1.2 MHz | |
| Inductor Range | 1 µH to 3.3 µH | |
| Charge Current Regulation Accuracy | ±2% | |
| Charge Voltage Regulation Accuracy | ±0.5% | |
| Power Monitor Accuracy | ±5% | |
| Package Type | 32-Pin 4 × 4 WQFN | |
| Operating Temperature Range | -40 to 85 | °C |
Key Features
- Charge 1- to 4-cell batteries from a wide range of input sources, including USB2.0, USB 3.0, USB 3.1 (Type C), and USB_PD.
- Seamless transition between buck and boost operation.
- Input current and voltage regulation (IDPM and VDPM) against source overload.
- Power/current monitor for CPU throttling with comprehensive PROCHOT profile, IMVP8 compliant.
- Narrow-VDC (NVDC) power path management with instant-on capability even without a battery or with a deeply discharged battery.
- Power up USB port from battery (USB OTG) with output voltage compatible with USB PD.
- Programmable switching frequency (800 kHz or 1.2 MHz) for 1 µH to 3.3 µH inductor.
- Host control interface via SMBus for flexible system configuration and status reporting.
- Integrated ADC to monitor voltage, current, and power.
- High accuracy regulation and monitoring.
- Safety features including thermal shutdown, input, system, and battery overvoltage protection, and MOSFET inductor overcurrent protection.
- Low battery quiescent current and input current optimizer (ICO) to extract maximum input power.
- Supports charging various battery chemistries: Li+, LiFePO4, NiCd, NiMH, Lead Acid.
Applications
- Ultra-books, notebooks, detachable, tablet PCs, and power banks.
- Industrial and medical equipment.
- Portable equipment with rechargeable batteries.
Q & A
- What is the input operating voltage range of the BQ25700A?
The input operating voltage range is 3.5 V to 24 V. - What types of USB inputs does the BQ25700A support?
The BQ25700A supports USB2.0, USB 3.0, USB 3.1 (Type C), and USB_PD input current settings. - What is the output voltage range in OTG mode?
The output voltage range in OTG mode is 4.48 V to 20.8 V. - What is the maximum output current limit in OTG mode?
The maximum output current limit in OTG mode is up to 6.35 A. - What are the programmable switching frequencies for the BQ25700A?
The programmable switching frequencies are 800 kHz or 1.2 MHz. - What is the range of inductors supported by the BQ25700A?
The BQ25700A supports inductors ranging from 1 µH to 3.3 µH. - What is the accuracy of charge current regulation?
The charge current regulation accuracy is ±2%. - What safety features does the BQ25700A include?
The BQ25700A includes thermal shutdown, input, system, and battery overvoltage protection, and MOSFET inductor overcurrent protection. - What types of battery chemistries does the BQ25700A support?
The BQ25700A supports Li+, LiFePO4, NiCd, NiMH, and Lead Acid battery chemistries. - What is the package type of the BQ25700A?
The package type is a 32-Pin 4 × 4 WQFN.
