BQ24031RHLRG4

单片充电和系统电源路径管理IC （ bqTINY ） SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC bqTINY

Description

The bqNY™ III-series of devices are highly integrated Li-ion linear chargers and system power-path management devices targeted at space-limited portable applications. The bqTINY III-series offer integrated USB-port and DC supply AC adapter, power-path management with autonomous power source selection, power FETs and current sensors, high accuracy current and voltage regulation, charge status, and charge termination, in a single monolithic device.

Features

• Small 3.5-mm × 4.5-mm QFN Package

• Designed for Single-Cell Li-Ion- or Li-Polymer Based Portable Applications

• Integrated Dynamic Power-Path Management DPPM Feature Allowing the AC Adapter or the USB Port to Simultaneously Power the System and Charge the Battery

• Power Supplement Mode Allows Battery to Supplement the USB or AC Input Current

• Autonomous Power Source Selection AC Adapter or USB

• Integrated USB Charge Control With Selectable

   100-mA and 500-mA Maximum Input Current Regulation Limits

• Dynamic Total Current Management for USB

• Supports Up to 2-A Total Current

• 3.3-V Integrated LDO Output

• Thermal Regulation for Charge Control

• Charge Status Outputs for LED or System Interface Indicates Charge and Fault Conditions

• Reverse Current, Short-Circuit, and Thermal Protection

• Power Good AC Adapter and USB Port Present Status Outputs

• Charge Voltage Options: 4.1 V, 4.2 V, or 4.36 V

Applications

• Smart Phones and PDAs

• MP3 Players

• Digital Cameras Handheld Devices

• Internet Appliances