Linear LED Drivers | CAT4240

LED 驱动器，升压转换器，6 W

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CAT4240 是一款 DC-DC 步进转换器，提供准确的恒定电流，适用于驱动 LED。该器件在 1 MHz 固定开关频率下运行，因此可结合价格较低的外部陶瓷电容器和电感器使用。串联联接的 LED 使用外部电阻器 R1 设置的调节电流驱动。CAT4240 高电压输出级适用于驱动最多包含十个串联白色 LED 的大中尺寸平板显示器。 LED 调光可以使用直流电压、逻辑信号或脉宽调制 (PWM) 信号进行。关断输入引脚使得该器件能够在“零”静止电流的情况下置于省电模式。 除了高温保护和过载电流限制之外，该器件还会在“开路 LED”故障条件下进入极低功耗运行模式。

  • LED Drive for Portable Electronics
  • GPS Navigation Systems
  • Portable Media Players
  • Digital Still Cameras
  • Switch Current Limit 750 mA
  • Drives High Voltage LED strings (38 V)
  • Up to 94% Efficiency
  • Low Quiescent Ground Current 0.6 mA
  • 1 MHz Fixed Frequency Low noise Operation
  • Soft start “in-rush” current limiting
  • Shutdown current less than 1 µA
  • Open LED Overvoltage Protection
  • Automatic Shutdown at 1.9 V (UVLO)
  • Thermal overload protection

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CAT4240TD-GT3

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Obsolete

CAD Model

Pb

A

H

P

TSOT-23-5

419AE

1

260

REEL

3000

N

5.5

350

10

1

Price N/A

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