Maxim MAX77962 3.2A USB－C降－升压充电器解决方案

Maxim公司的MAX77962是具有智能电源选择器(Smart Power Selector™)高性能宽输入3.2A降压-升压充电器,不需要另外电感就能工作在反向降压模式,是得器件能对USB OTG附件进行供电.器件集成了低损耗功率开关,提供小尺寸解决方案,高效率,低热量和快报速充电.反向降压真负载断开,受到可调整输出电流限制所保护.器件具有高度灵活性,通过I2C配置或通过电阻配置自主可编程.输入工作电压3.5V到23V,经受电压30VDC,反向漏电保护,可编输入电流限制50mA到3.15A,可编恒定电流充电50mA到3.15A,遥控差分电压检测,充电安全计时器,具有热回馈回路的芯片温度调整,具有适配输入电流限制(AICL)和输入电压调整的输入功率管理, 10mΩ BATT 到 SYS开关,高达10A过流阈值.反向降压模式5.1V/1.5A支持USB OTG,JEITA和NTC热敏电阻监视器兼容, 3.458mm x 3.458mm 49-Bump WLP封装,主要用在USB Type-C供电宽输入充电和2个电池供电设备.本文介绍了MAX77962主要优势和特性,简化框图,充电状态图,宽输入I2C可编充电器等多种应用电路,以及评估板MAX77962 EVK主要特性,电路图,材料清单和PCB设计图.

 The MAX77962 is a high-performance wide-input 3.2A buck-boost charger with a Smart Power Selector™ and operates as a reverse buck without an additional inductor, allowing the IC to power USB On-the-Go (OTG) acces­sories. The device integrates low-loss power switches, and provides small solution size, high-efficiency, low heat, and fast battery charging. The reverse buck has true-load disconnect and is protected by an adjustable output cur­rent limit. The device is highly flexible and programmable through I2C configuration or autonomously through resis­tor configuration.

The battery charger includes a Smart Power Selector to accommodate a wide range of battery sizes and system loads. The Smart Power Selector allows the system to start up gracefully when an input source is available even when the battery is deeply discharged (dead battery) or missing. For battery safety/authentication reasons, the IC can be configured to keep charging disabled, and allow the DC-DC to switch and regulate the...