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CAT4003B - Constant Current Programmable LED Driver

Download the CAT4003B datasheet PDF. This datasheet also covers the CAT4002B variant, as both devices belong to the same constant current programmable led driver family and are provided as variant models within a single manufacturer datasheet.

General Description

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.

Key Features

  • 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 mA.
  • 25 mA Max LED Current per Channel.
  • Dimming via 1-wire EZDim Interface.
  • Thermal Shutdown Protection.
  • RoHS Compliant.
  • 6-lead TSOT-23, TSOP, SC-70, and 8-pad UDFN 2 mm x 2 mm Packages Typical.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (CAT4002B_ONSemiconductor.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number CAT4003B
Manufacturer onsemi
File Size 378.16 KB
Description Constant Current Programmable LED Driver
Datasheet download datasheet CAT4003B Datasheet

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Other Datasheets by onsemi

Part Number Description
CAT4002A Constant Current LED Driver
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CAT4004A Constant Current LED Driver
CAT4004B Constant Current Programmable LED Driver
CAT4008 8-Channel Constant Current LED Driver

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
Constant Current Programmable LED Driver with 32 Dimming Levels CAT4003B, CAT4004B Description 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.