feedback
Rate this webpage
Need
Support?

CAT4238: LED Driver, Boost Converter, High Efficiency

Datasheet: LED Driver, Boost, 10 LED, series
Rev. 5 (127kB)
Product Overview
»View Reliability Data
»View Material Composition
» Product Change Notification
The CAT4238 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. LED currents up to 40 mA can be supported over a wide range of input supply voltages up to 5.5 V, making the device ideal for battery-powered applications. The CAT4238 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
 
  • Drives High Voltage LED strings (38 V)
  • Up to 87% Efficiency
  • Low Quiescent Ground Current 0.6 mA
  • Adjustable Output Current
  • 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
  • Mid-size and Large Panel Displays
Applications   End Products
  • LED Drive in battery Powered Devices
 
  • GPS Navigation Systems
  • Portable Gaming Systems
  • 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
CAT4238AGEVB Active
Pb-free
High Voltage CMOS Constant-Current DC-DC Converter Evaluation Board
Availability & Samples
Specifications
Case Outlines
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
CAT4238TD-GT3 Active
Pb-free
Halide free
CAT4238 TSOT-23-5 419AE 1 260 Tape and Reel 3000 $0.4947
Market Leadtime (weeks) : Contact Factory
FutureElectronics   (2020-08-19 00:00) : >10K
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
CAT4238TD-GT3  
 $0.4947 
Pb
H
 Active   
Step-Up
2
5.5
38
100
1000
TSOT-23-5
Case Outlines
419AE   
Packages
CAT4238: LED Driver, Boost Converter, High Efficiency
CAT4238: LED Driver, Boost Converter, High Efficiency
Previously Viewed Products
Clear List

Your request has been submitted for approval.
Please allow 2-5 business days for a response.
You will receive an email when your request is approved.
Request for this document already exists and is waiting for approval.