DC-DC LED Drivers | CAT3648

LED 驱动器，4 沟道，带 32 个调光级别

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CAT3648 是一款高能效分数型电荷泵，最多可驱动四个 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，用于设置所有 LED 沟道中的电流。1 线脉冲调光接口支持 32 个线性步进，从全电流到零电流。

  • LCD Display Backlight

  • Mobile Phones
  • Digital Still Camera

  • High efficiency 1.33x charge pump
  • Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
  • Drives up to 4 LEDs at 25 mA each
  • 1-wire EZDim™ 32 linear steps
  • 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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CAT3648HV3-GT2

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CAD Model

Pb

A

H

P

TQFN-16

510AD

1

260

REEL

2000

N

Charge Pump

2.5

5.5

6

100

1000

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可靠性数据

Die Related Summary Data

Device: CAT3648HV3-GT2

Equivalent to wafer fab process: CMOS SUB

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等效器件小时

平均故障间隔时间/平均无故障时间（按小时计算）

FITS

CMOS SUB

2

920154574

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Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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