EV0062

Active
1.3MHz Low Power, LED Torch/Flash Driver


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Product Description

The EV0062 is an evaluation board designed to drive up to four (4) white LEDs in series. The board is based on MPS’ MP1541 SOT23 current mode step up converter. The MP1541 is intended for small, low power applications. The MP1541 switches at 1.3MHz and allows the use of tiny, low cost capacitors and inductors 2mm or less in height. Internal soft start results in small inrush current and extends the battery life. The MP1541 operates from an input voltage as low as 2.5V and can generate 12V at up to 200mA from a 5V supply.

The MP1541 includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload. The MP1541 is available in a small 5­lead TSOT23 package.

Product Features

  • On Board Power MOSFET
  • Uses Tiny Capacitors and Inductors
  • 1.3MHz Fixed Switching Frequency
  • Internally Compensated
  • Internal Soft Start
  • Operates with Input Voltage as Low as 2.5V and Output Voltage as High as 22V
  • 12V at 200mA from 5V Input
  • UVLO, Thermal Shutdown
  • Internal Current Limit
  • Available in a TSOT23-5 Package

Parametrics

  • IC Supported 1MP1541

Monolithic IC

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IC Details

MP1541 是一款用于小功率、低功耗应用的电流控制模式升压转换器,采用 5 引脚薄款 SOT23 封装。MP1541 的开关频率为 1.3MHz,可使用小体积低成本的电容及 2mm 或更薄的电感。内部软启动使其具有较小的浪涌电流,从而可延长电池寿命。MP1541 输入电压可低至2.5V,可从 5V电源转换得到 12V,200mA 输出电流。MP1541 包含欠压锁定保护、限流保护和热过载保护,可防止输出过载时损坏芯片。MP1541 采用 5 引脚 TSOT23 封装或 QFN-8(2mmX2mm) 封装。