DC-DC LED Drivers | CAT4238

LED Driver, Boost Converter, High Efficiency

Availability & Samples

Favorite

Datasheet
CAD Model

CAD Model

Overview

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.

  • LED Drive in battery Powered Devices
  • GPS Navigation Systems
  • Portable Gaming Systems
  • Digital Still Cameras
  • 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

Material Composition

Product Change Notification

Search

Close Search

Products:

1

Share

Sort by

  • Price/Unit

Product Groups:

┗

Orderable Parts:

1

Product

Status

CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Topology

VIN Min (V)

VIN Max (V)

VO Max (V)

IO Max (mA)

fSW Typ (kHz)

Pricing ($/Unit)

CAT4238TD-GT3

Active

CAD Model

Pb

A

H

P

TSOT-23-5

419AE

1

260

REEL

3000

Y

Step-Up

2

5.5

38

100

1000

$0.6113

More Details

Show More

1-25 of 25

Products per page

Jump to :

1
Email Sales
Please provide a first name.
Please provide a last name.
Please provide a company/university name.
Please provide a valid email.
Please choose a country.
Please choose a job title.
Please provide a how could we help you.
You have to agree with the privacy policy.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Hello, your current browser settings are preventing us from processing your submission. You can adjust your browser settings and reload the page or you can submit an email directly to inside.sales@onsemi.com

You might also try the following:

  • Clear your browser cookies
  • Try to open this page in anonymous browser window
  • Try a different browser
  • Make sure you have reliable internet connection