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MAX1772：低成本、多种化学类型电池充电器电路

精度为0.7%的输入限流、多化学类型电池充电器，提供完备的解决方案

The MAX1772 is a highly-integrated, multichemistry battery-charger control IC that simplifies the construction of accurate and efficient chargers. The MAX1772 uses analog inputs to control charge current and voltage and can be programmed by the host or hardwired. High efficiency is achieved by a buck topology with synchronous rectification. Maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, battery-charging current, and the presence of an AC adapter. The MAX1772 can charge two to four lithium-ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage. It is available in a space-saving 28-pin QSOP package.

关键特性 Input Current Limiting ±0.5% Output Voltage Accuracy Using Internal Reference (0°C to +85°C) Programmable Battery Charge Current >4A Analog Inputs Control Charge Current and Charge Voltage Monitor Outputs for: Current Drawn from AC Input Source Charging Current AC Adapter Present Up to 18.2V (max) Battery Voltage 8V to 28V Input Voltage >95% Efficiency 99.99% (max) Duty Cycle for Low-Dropout Operation Charges Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.

功能框图 产品应用 手持式终端 笔记本电脑和亚笔记本电脑 PDA及其它手持设备

关键参数

数据手册DataSheet

开发工具

• MAX1772EVKIT

技术资料

• Smart Battery-Charging Schemes for Level 2 Chargers are Accurate and Efficient
• Battery Chargers Fulfill System Power Requirements and Charge Batteries

质量和环境数据

• MAX1772.pdf

订购型号