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CAT4139: White LED Driver, High Current Boost, 22 V

Datasheet: White LED Driver, 22 V, High Current Boost
Rev. 2 (128kB)
Product Overview
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» Product Change Notification
The CAT4139 is a DC/DC step-up converter that delivers an accurate constant current ideal for driving LEDs. Operation at a fixed switching frequency of 1MHz allows the device to be used with small value external ceramic capacitors and inductor. LEDs connected in series are driven with a regulated current set by the external resistor R1. The CAT4139 is ideal for driving parallel strings of up to five white LEDs in series or up to 22 V.

LED dimming can be done by using a DC voltage, a logic signal, or a pulse width modulation (PWM) signal. The shutdown input pin allows the device to be placed in power-down mode with 'zero' quiescent current.

In addition to thermal protection and overload current limiting, the device also enters a very low power operating mode during 'Open LED' fault conditions.
Features
 
  • Switch Current Limit 750 mA
  • Drives LED strings up to 22 V
  • Up to 87% Efficiency
  • Low Quiescent Ground Current 0.6 mA
  • 1 MHz Fixed Frequency Low noise Operation
  • Soft start “in-rush” current limiting
  • Shutdown current less than 1 µA
  • Open LED Overvoltage Protection
  • Automatic Shutdown at 1.9 V (UVLO)
  • Thermal overload protection
Applications   End Products
  • LED Drive for Parallel Strings
 
  • GPS Navigation Systems
  • Portable Media Players
Technical Documentation & Design Resources
Application Notes (1) Package Drawings (1)
Data Sheets (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.
CAT4139TD-GT3 Active
Pb-free
Halide free
CAT4139 TSOT-23-5 419AE 1 260 Tape and Reel 3000 $0.4796
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : >1K
FutureElectronics   (2020-08-19 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
CAT4139TD-GT3  
 $0.4796 
Pb
H
 Active   
Step-Up
2.2
5.5
24
350
1000
TSOT-23-5
Case Outlines
419AE   
Packages
CAT4139: White LED Driver, High Current Boost, 22 V
CAT4139: White LED Driver, High Current Boost, 22 V
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