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.

• 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

• 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

BQ25730的完整型号有：BQ25730RSNR，以下是这些产品的关键参数及官网采购报价：

BQ25730RSNR，工作温度：-40 to 85，封装：QFN (RSN)-32，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ25730RSNR的批量USD价格：1.47（1000+）

BQ25730EVM — I2C NVDC 1 至 5 节电池 16A 降压/升压电池充电控制器评估模块

BQ25730EVM 评估模块 (EVM) 是一款具有 N 沟道 MOSFET 选择器和电流监控功能的 I2C 控制型 NVDC（窄电压直流）降压/升压充电控制器。降压转换器的输入电压范围为 3.5V 至 26V，并具有 1-5 节电池的可编程输出以及 128mA 至 15A 的充电输出电流范围。此 EVM 不含 EV2400 接口器件；如需评估 BQ25730EVM，则须单独订购此器件。

TI-CHARGER-GUI — 用于 USB2ANY 和电池充电评估模块的 GUI 软件

TI-CHARGER-GUI 提供基于网络的或独立的图形用户界面，可辅助评估、设计、配置或测试电池充电器产品。该软件可实现对寄存器的全面访问，并提供一个简单接口用于发送时序命令。