DC-DC LED Drivers | CAT3626

LED Driver, Charge Pump, 6-Channel, I2C Interface

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The CAT3626 is a high efficiency 1x/1.5x fractional charge pump with programmable dimming current in six LED channels. To ensure uniform brightness in LCD backlight applications, each LED channel delivers an accurate regulated current.

Low noise and input ripple is achieved by operating at a constant switching frequency of 1MHz which allows the use of small external ceramic capacitors. The 1x/1.5x fractional charge pump supports a wide range of input voltages from 3V to 5.5V with efficiency up to 91%, and is ideal for Li-Ion battery powered devices.

The LED channels are configured into three independent pairs, each containing 2 matched channels. Each pair can be separately programmed from zero to 32 mA, in 0.5 mA resolution steps, using the I2C serial interface. Any individual channel can be disabled while others remain active. When the enable input (EN) is low, the device is in shutdown mode drawing zero current.

  • RGB LEDs
  • LCD and keypad Backlighting

  • Mobile Phones
  • Digital Cameras

  • Drives 6 LED channels
  • Independent current on 3 pairs of LEDs
  • I²C serial interface programming
  • Adjustable current to 32 mA in 0.5 mA steps
  • Power efficiency up to 91%
  • Fractional pump 1x/1.5x
  • Low noise input ripple
  • Fixed High Frequency Operation 1MHz
  • “Zero” Current Shutdown Mode
  • Soft start and current limiting
  • Short circuit protection
  • Thermal shutdown protection

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CAT3626HV4-GT2

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CAD Model

Pb

A

H

P

TQFN-16

510AE

1

260

REEL

2000

Y

Charge Pump

3

5.5

6

192

1000

$0.7314

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Die Related Summary Data

Device: CAT3626HV4-GT2

Equivalent to wafer fab process: CMOS SUB

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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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