[原创]Maxim MAX25610B同步降压和降－升压LED驱动方案

Maxim公司的MAX25610A/MAX25610B是全同步LED驱动器,提供恒定输出电流来驱动大功率LED. MAX25610A/MAX25610B集成了两个60mΩ功率MOSFET,用于同步操作以最少化外接元件.器件的灵活配置支持降压,反向降压-升压和升压转换.器件采用电流模式控制,提供快速瞬态响应和容易实现回路稳定.器件还包括逐个周期的电流限制,输出过压保护(OVP),LED串开路保护,输出短路保护(SCP)和热关断.器件满足汽车AEC-Q100规范,在降压-升压应用输入电压从5V到36V,开关频率2.2MHz降低了电感尺寸,内部电流检测降低成本,集成了高边和低边开关MOSFET,带模拟控制电压的PWM调光,从而最少化调光所需要元件数量.工作温度-40°C 到 +125°C,主要用在汽车照明和工业照明.本文介绍了MAX25610A/B主要优势和特性,功能框图和多种应用电路,以及评估板MAX25610B EVK主要特性,电路图,材料清单和PCB设计图.



 The MAX25610A/MAX25610B are fully synchronous LED drivers that provide constant output current to drive high-power LEDs. The MAX25610A/MAX25610B integrate two 60mΩ power MOSFETs for synchronous operation, minimizing external components. Flexible configuration supports buck, inverting buck-boost, and boost conversion. The devices incorporate current-mode control that provides fast transient response and eases loop stabilization. The MAX25610A/MAX25610B include cycle by cycle current limiting, output overvoltage protection (OVP), open-string protection, output short-circuit protection (SCP), and thermal shutdown.

In LED driver applications, the MAX25610A/MAX25610B provide analog dimming of the LED current through th..

查看全文