CAT4240: LED Driver, Boost Converter, 6 Watt

Datasheet: LED Driver, 6 Watt, Step-Up Converter
Rev. 3 (180.0kB)
Product Overview
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The CAT4240 is a DC-DC step-up converter that delivers an accurate constant current ideal for driving LEDs. Operation at a fixed switching frequency of 1 MHz 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 CAT4240 high-voltage output stage is perfect for driving mid-size and large panel displays containing up to ten white LEDs in series.

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.
  • Switch Current Limit 750 mA
  • Drives High Voltage LED strings (38 V)
  • Up to 94% 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 Portable Electronics
  • GPS Navigation Systems
  • Portable Media Players
  • Digital Still Cameras
Technical Documentation & Design Resources
Data Sheets (1) FAQ (1)
Package Drawings (1)  
Budgetary Price/Unit
Case Outline
CAT4240TD-GT3 Obsolete
Halide free
CAT4240 TSOT-23-5 419AE 1 260 Tape and Reel 3000  
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14) : >1K
Case Outlines
CAT4240: LED Driver, Boost Converter, 6 Watt
CAT4240: LED Driver, Boost Converter, 6 Watt
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