BQ25620中文资料具有 18V 最大输入、集成 ADC 和 OTG 输出的 I²C 控制型单芯 3.5A 降压电池充电器数据手册TI规格书

描述 Description

BQ25620 and BQ25622 are a highly-integrated 3.5-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer batteries. The solution is highly integrated with built-in current sensing, loop compensation, input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and battery FET (BATFET, Q4) between system and battery. It uses narrow VDC power path management, regulating the system slightly above the battery voltage without dropping below a configurable minimum system voltage. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time, extends battery life during discharging phase, and the ultra-low 0.15-µA ship mode current extends battery shelf life. The I2C serial interface with charging and system settings makes BQ25620 and BQ25622 truly flexible solutions.

特性 Features

• High-efficiency, 1.5-MHz, synchronous switching mode buck charger for single cell battery
• Charge termination from 10 mA to 620 mA, 10-mA steps
• BATFET control to support shutdown, ship mode and full system reset
• 0.15-µA battery leakage current in ship mode
• Supports USB On-The-Go (OTG)
• >90% boost efficiency down to 100-mA OTG current for 5-V VBUS
• Supports a wide range of input sources
• Maximizes source power with input voltage regulation (VINDPM) and input current regulation (IINDPM)
• Efficient battery operation with 15-mΩ BATFET
• System instant-on with depleted or no battery
• Flexible autonomous or I2C-controlled modes
• High accuracy
• ±5% charge current regulation
• Safety
• Input, system, battery overvoltage protection
• Charging safety timer