MAX25610A / MAX25610B是完全同步的LED驱动器,可提供恒定输出电流以驱动大功率LED。MAX25610A / MAX25610B集成了两个60MΩ功率MOSFET以进行同步操作,最大限度地减少外部组件。灵活配置支持降压,反相降压 - 升压和升压转换。该设备采用电流模式控制,提供快速瞬态响应并简化环路稳定化。MAX25610A / MAX25610B包括循环电流限制,输出过压保护(OVP),开弦保护,输出短路保护(SCP)和热关断。在LED驱动器应用中,MAX25610A / MAX25610B通过REFI引脚提供LED电流的模拟调光,并通过PWMDIM引脚进行PWM调光。当PWMDIM高时,启用切换,并且当PWMDIM低时,带有MOSFET的两个MOSFET禁用。PWMDIM引脚的模拟编程使内置的数字调光功能能够通过PWMFRQ引脚选择调光频率。MAX25610A / MAX25610B包括两个5V稳压器。VCC和AGND之间的调节5V用于IC偏置,REFI和PWMFRQ编程。 Another low current regulated 5V between VEE and INN is used for analog PWMDIM and FLT pullup. Both PWMDIM and FLT reference INN for easy system interface. Switching frequency is internally set at 400kHz for the MAX25610A and 2.2MHz for the MAX25610B. The devices have built-in spread spectrum to reduce EMI noise. External and internal current sense are supported, with ±3% and ±6% respective LED current accuracy.