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CAT4004B: LED Driver, Constant Current Programmable with 32 Dimming Levels

Datasheet: LED Driver, Constant Current Programmable, with 32 Dimming Levels
Rev. 2 (178.0kB)
Product Overview
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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.
Features   Benefits
     
  • Low Dropout Driver 75 mV at 20 mA
 
  • Can drive LEDs at lower VIN
  • Dimming via 1-wire EZDimTM Interface
 
  • higher resolution dimming
  • 3, 4 LED Current Sinks with Tight Matching
   
  • 32 Dimming Levels
   
  • No Switching Noise
   
  • Shutdown Current less than 1 µA
   
  • 25 mA Max LED Current per Channel
   
  • Thermal Shutdown Protection
   
Applications   End Products
  • LCD Display Backlight
 
  • Mobile Phones
  • Digital Still Cameras
Technical Documentation & Design Resources
Data Sheets (1) Package Drawings (1)
Availability & Samples
Specifications
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
CAT4004BHU2-GT3 Active
Pb-free
Halide free
CAT4004B UDFN-8 517AW 1 260 Tape and Reel 3000 $0.2667
Market Leadtime (weeks) : 8 to 12

Product
Description
Pricing ($/Unit)
Compliance
Status
VI Max (V)
IO Max (mA)
LEDs in Series, Max #
LEDs in Parallel, Max #
Package Type
CAT4004BHU2-GT3  
 $0.2667 
Pb
H
 Active   
5.5
50
1
4
UDFN-8
Case Outlines
517AW   
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