Linear LED Drivers | CAT4004B

LED Driver, Constant Current Programmable with 32 Dimming Levels

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The CAT4003B and CAT4004B provide respectively three and four matched low dropout current sources to drive LEDs. The CAT400XB requires no external RSET resistor. The LED current is internally set to 25 mA when the device is first enabled. Each LED channel includes an individual control loop allowing the device to handle a wide range of LED forward voltages while still maintaining tight current matching. The EN/DIM logic input supports the device enable and a digital dimming interface for setting the LED channel current with 32 linear dimming levels. LEDs can be powered directly from a Lithium-ion battery due to the low dropout (75 mV at 20 mA) current sinks. Package options are available in the 4-channel tiny 8-pad UDFN 2 mm x 2 mm with a max height of 0.55 mm, and 3- channel in the 6-lead TSOT-23, TSOP and SC-70.

  • LCD Display Backlight

  • Mobile Phones
  • Digital Still Cameras

  • 3, 4 LED Current Sinks with Tight Matching
  • 32 Dimming Levels
  • Low Dropout Driver 75 mV at 20 mA
  • No Switching Noise
  • Shutdown Current less than 1 µA
  • 25 mA Max LED Current per Channel
  • Dimming via 1-wire EZDimTM Interface
  • Thermal Shutdown Protection

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CAT4004BHU2-GT3

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Pb

A

H

P

UDFN-8

517AW

1

260

REEL

3000

Y

5.5

50

1

4

$0.2667

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可靠性数据

Die Related Summary Data

Device: CAT4004BHU2-GT3

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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