ADI LT8491高压降压－升压电池充电控制方案

ADI公司的LT8491是具有最大功率点 跟踪(MPPT)和 I2C的高压降压-升压电池充电控制器.具有自动MPPT用于太阳能充电,自动温度补偿与I2C 遥测和配置. VIN 范围为6V 至 80V,VBAT 范围为1.3V 至 80V.器件内部 EEPROM 用于配置​存储, 可同步的固定频率为100kHz 至 400kHz.器件集成了四个反馈环路,能实现恒流恒压(CCCV)充电,适合于大多数电池包括密封铅酸(SLA)电池,富液式电池,凝胶和锂电池. 64 引脚 (7mm × 11mm × 0.75mm) QFN 封装.主要应用在太阳能电池充电器,多种类型铅酸电池充电,锂电池充电器和电池供电的工业设备或手持军用设备.本文介绍了LT8 491主要特性,框图,简化太阳能电池充电电路图和锂聚合物电池充电电路图, 56.8V铅酸电池充电器电路图以及演示板DC2703A-A-KIT主要特性,电路图,材料清单.

The LT®8491 is a buck-boost switching regulator battery charger that implements a constant-current constant voltage (CCCV) charging profile used for most battery types, including sealed lead-acid (SLA), flooded, gel and lithium-ion.

The device operates from input voltages above, below or equal to the output voltage and can be powered by a solar panel or a DC power supply. On-chip logic provides automatic

maximum power point tracking (MPPT) for solar powered applications. The LT8491 can perform automatic temperature compensation by sensing an external thermistor thermally coupled to the battery. The STATUS pin can be used to drive an LED indicator lamp. The device is available in a low profile (0.75mm) 7mm × 11mm 64-lead QFN package

LT8 491主要特性:

n VIN Range: 6V to 80V

n VBAT Range: 1.3V to 80V

n Single Inductor Allows VIN Above, Below, or Equal to VBAT

n Automatic MPPT for Solar Powered Charging

n Automatic Temperature Compensation

n I2C Telemetry and Configuration

n Internal EEPROM for Configuration Storage

n Operation from Solar P...