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CAT4240: LED Driver, Boost Converter, 6 Watt

Datasheet: LED Driver, 6 Watt, Step-Up Converter
Rev. 3 (180.0kB)
»View Material Composition
»Product Change Notification (3)
Product Overview
Product Description
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.
Features
 
  • 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) Evaluation Board Documents (5)
Package Drawings (1)  
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
CAT4240AGEVB Active
Pb-free
DC-DC Step-Up Converter Evaluation Board
Avnet (2015-07-09) : 2
Availability and Samples
Product
Status
Compliance
Description
Package
MSL*
Container
Budgetary Price/Unit
Type
Case Outline
Type
Qty.
CAT4240TD-GT3 Lifetime
Pb-free
Halide free
LED Driver, Boost Converter, 6 Watt TSOT-23-5 419AE 1 Tape and Reel 3000  
Moisture Sensitivity level (MSL) for surface mount devices (lead free measured at 260°C reflow, non lead free at 235°C reflow)
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2015-07-08) : 60,000
PandS   (2015-07-09) : >1K
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