BQ24650RVAR

同步开关模式电池充电控制器用于太阳能电源的最大功率点跟踪 Synchronous Switch-Mode Battery Charge Controller for Solar Power With Maximum Power Point Tracking

Description

The bq24650 device is a highly integrated switch mode battery charge controller. It provides input voltage regulation, which reduces charge current when input voltage falls below a programmed level. When the input is powered by a solar panel, the input regulation loop lowers the charge current so that the solar panel can provide maximum power output.

Features

• Maximum Power Point Tracking MPPT Capability by Input Voltage Regulation

• Programmable MPPT Setting

• 5-V to 28-V Input Solar Panel

• 600-kHz NMOS-NMOS Synchronous Buck Controller

• Resistor Programmable Float Voltage

• Accommodates Li-Ion/Polymer, LiFePO4, Lead Acid Chemistries

• Accuracy

   – ±0.5% Charge Voltage Regulation

   – ±3% Charge Current Regulation

   – ±0.6% Input Voltage Regulation

• High Integration

   – Internal Loop Compensation

   – Internal Digital Soft Start

• Safety

   – Input Overvoltage Protection

   – Battery Temperature-Sensing

   – Battery Absent Detection

   – Thermal Shutdown

• Charge Status Outputs for LED or Host Processor

• Charge Enable on MPPSET Pin

• Automatic Sleep Mode for Low Power Consumption

   – < 15-μA OFF-State Battery Discharge Current

• Small 3.5 × 3.5 mm2 16-Pin QFN Package

Applications

• Solar-Powered Applications

• Remote Monitoring Stations

• Portable Handheld Instruments

• 12-V to 24-V Automotive Systems

• Current-Limited Power Source