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CAT3648: LED Driver, 4-Channel with 32 Dimming Levels

Datasheet: LED Driver, 4-Channel with 32 Dimming Levels
Rev. 3 (203kB)
Product Overview
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The CAT3648 is a high efficiency fractional charge pump that can drive up to four LEDs programmable by a one wire digital interface. The inclusion of a 1.33x fractional charge pump mode increases device efficiency by up to 10% over traditional 1.5x charge pumps with no added external capacitors.

Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external ceramic capacitors. The multi-fractional charge pump supports a wide range of input voltages from 2.4 V to 5.5 V.

The EN/DIM logic input functions as a chip enable and a digital dimming interface for setting the current in all the LED channels. The 1-wire pulse-dimming interface supports 32 linear steps from full-scale down to zero current.
Features
 
  • 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
Applications   End Products
  • LCD Display Backlight
 
  • Mobile Phones
  • Digital Still Camera
Technical Documentation & Design Resources
Data Sheets (1) FAQ (1)
Package Drawings (1)  
Availability & Samples
Specifications
Case Outlines
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
CAT3648HV3-GT2 Active
Pb-free
Halide free
CAT3648 TQFN-16 510AD 1 260 Tape and Reel 2000 $0.3333
Market Leadtime (weeks) : 2 to 4
PandS   (2020-09-14 00:00) : <1K

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
VIN Min (V)
VIN Max (V)
VO Max (V)
IO Max (mA)
fSW Typ (kHz)
Package Type
CAT3648HV3-GT2  
 $0.3333 
Pb
H
 Active   
Charge Pump
2.5
5.5
6
100
1000
TQFN-16
Case Outlines
510AD   
Packages
CAT3648: LED Driver, 4-Channel with 32 Dimming Levels
CAT3648: LED Driver, 4-Channel with 32 Dimming Levels
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