BQ24704中文资料具有低输入电源检测功能和低 Iq 的主机控制型多化合物电池充电器数据手册TI规格书

描述 Description

The bq24704 is a high-efficiency, synchronous battery charger with integrated compensation offering low component count for space-limited Li-Ion and Li-Polymer battery charging applications. Charge current and voltage programming allows high regulation accuracies, and can be either hardwired with resistors, or programmed by the system power-management microcontroller using a DAC or GPIOs.The bq24704 charges two, three, or four series Li+ cells, supporting up to 8 A of charge current, and is available in a 24-pin, 4x4-mm thin QFN package. The bq24704 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. A highly-accurate current-sense amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power.

特性 Features

• NMOS-NMOS Synchronous Buck Converter with 300 kHz Frequency and >95% Efficiency
• High-Accuracy Voltage and Current Regulation
• ±3% Charge Current Accuracy
• ±2% Input Current Sense Amp Accuracy
• Integration
• Internal Soft-Start
• Safety
• Charger Overcurrent Protection
• Thermal Shutdown
• Supports Two, Three, or Four Li+ Cells
• Analog Inputs with Ratiometric Programming via Resistors or DAC/GPIO Host Control
• Charge Current (up to 8 A, with 10-m Sense Resistor)
• Status and Monitoring Outputs
• DPM Loop Active (DPMDET)
• Charge Enable
• Energy Star Low Iq
• APPLICATIONS
• Portable Data-Capture Terminals
• Medical Diagnostics Equipment
• Battery Back-Up Systems

PowerPad is a trademark of Texas Instruments.