LM3405XEVAL
为 LED 供电的 1.6MHz 1A 恒流降压稳压器
LM3405XEVAL
概述
The LM3405 demo board is configured to drive a series string of high power, high brightness LEDs at a forward current of 1A using the LM3405 constant current buck regulator. The board can accept a full input operating range of 3V to 15V. The converter output voltage adjusts as needed to maintain a constant current through the LED array. The LM3405 is a step-down regulator with an output voltage range extending from a VO(MIN) of 205mV (the reference voltage) to a VO(MAX) determined by the maximum duty cycle (typically 94%). It can drive up to 3 LEDs in series at 1A forward current, with the single LED forward voltage of approximately 3.7V (Typical of white, blue, and green LEDs using InGaN technology).
特性
- VIN operating range of 3V to 15V
- Thin SOT23-6 package
- 1.6MHz switching frequency
- 300mΩ NMOS switch
- 40nA shutdown current at VIN = 5V
- EN/DIM input for enabling and PWM dimming of LEDs
- Internally compensated current-mode control
- Cycle-by-cycle current limit
- Input voltage UVLO
- Over-current protection
- Thermal shutdown
Applications:
- LED Driver
- Constant Current Source
- Industrial Lighting
- LED Flashlights
照明 LED 驱动器
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LM3405XEVAL/NOPB — 1.6MHz, 1A Constant Current Buck Regulator for Powering LEDs
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| 类型 | 标题 | 下载最新的英文版本 | 日期 | |||
|---|---|---|---|---|---|---|
| * | EVM 用户指南 | AN-1590 LM3405 Demo Board (Rev. A) | 2013年 5月 1日 | |||
| 证书 | LM3405XEVAL/NOPB EU Declaration of Conformity (DoC) | 2019年 1月 2日 | ||||
| 应用手册 | Powering & Dimming High-Brightness LEDs w/ LM3405 Constant-Current Buck Reg (Rev. A) | 2013年 5月 1日 |