Linear LED Drivers | CAT3606

LED 驱动器，电荷泵，6 沟道

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CAT3606 控制蜂窝电话中主显示屏的最多四个 LED，以及子显示屏的两个 LED。该器件能够以 1x (LDO) 模式或 1.5x 电荷泵模式运行。所有 LED 引脚电流均进行调节，并严格匹配，以实现 LCD 背光灯中的亮度统一性。外部电阻 (RSET) 设置标称输出电流。该器件在低电压运行 (3 V) 时可提供每个沟道 20 mA，在标称运行 (3.3 V) 时可提供每个沟道 30 mA 输出电流。恒定高频率开关方案 (1MHz) 提供低噪声，可使用非常小值的陶瓷电容器。通过芯片启用引脚 EN 可实现“零”静止电流模式。每个主要和次要 LED 均具有自己的专用开/关控制引脚（ENM，ENS）。使用直流电压控制 RSET 引脚电流，或对 ENM 和 ENS 引脚应用 PWM 信号，可以实现调光。

  • Color LCD and keypad Backlighting
  • Portable MP3 Players
  • Digital Cameras
  • Mobile Phones
  • Drives up to 4 main LEDs and 2 sub LEDs
  • Separate control for main and sub LEDs
  • Compatible with supply voltage of 3 V to 5.5 V
  • Power efficiency up to 90%
  • Output current up to 30mA per LED
  • High-frequency Operation at 1 MHz
  • 2 modes of operation 1x and 1.5x
  • White LED detect circuitry on all channels
  • Shutdown current less than 1 µA
  • Small ceramic capacitors
  • Soft start and current limiting
  • Short circuit protection

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VI Max (V)

IO Max (mA)

LEDs in Series, Max #

LEDs in Parallel, Max #

Reference Price

CAT3606HV4-T2

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Obsolete

CAD Model

Pb

A

H

P

TQFN-16

510AE

1

260

REEL

2000

N

5.5

180

6

Price N/A

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