Linear LED Drivers | CAT3643

LED 驱动器，3 沟道

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概览

CAT3643 是一款高能效分数型电荷泵，最多可驱动三个 LED，可通过单线数字接口进行编程。包含的 1.33x 分数型电荷泵模式与传统的 1.5x 电荷泵相比，可将器件能效提高达 10%，且无增加的外部电容器。 通过恒定开关频率运行可实现低噪声输入波纹，允许使用小型外部陶瓷电容器。该多分数型电荷泵支持 2.4 V 至 5.5 V 的宽输入电压范围。EN/DIM 逻辑输入作为芯片启用和数字调光接口，用于所有 LED 的电流设置。通过该接口可提供六个不同的电流比。

  • LCD Display Backlight
  • Mobile Phones
  • Digital Still Cameras
  • High efficiency 1.33x charge pump
  • Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
  • Drives up to 3 LEDs at 32 mA each
  • 1-wire EZDim™ LED current programming
  • Power efficiency up to 92%
  • Low noise input ripple in all modes
  • “Zero” current shutdown mode
  • Soft start and current limiting
  • Short circuit protection
  • Thermal shutdown protection

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VI Max (V)

IO Max (mA)

LEDs in Series, Max #

LEDs in Parallel, Max #

Reference Price

CAT3643HV2-GT2

Contact Sales

Obsolete

CAD Model

Pb

A

H

P

TDFN-12

511AN

1

260

REEL

2000

N

5.5

90

1

3

Price N/A

More Details

CAT3643HV3-GT2

Contact Sales

Obsolete

CAD Model

Pb

A

H

P

TQFN-16

510AD

1

260

REEL

2000

N

5.5

90

1

3

Price N/A

More Details

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