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Linear LED Drivers | CAT4134

LED Driver, Dual Channel Movie / Flash, 500 mA

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Overview

The CAT4134 is a high power, dual channel boost converter which provides two matched LED currents. Output current levels are controlled by one of two resistors RSET or RFLASH. When the FLASH input pin is low (movie mode), RSET sets the current. When FLASH is high (flash mode), the resistor RFLASH sets the LED current. Each channel drives two or three white LEDs in series and provides a regulated current to control their brightness. Input supply down to 3V is supported, making the device ideal for Li-Ion battery applications.

High frequency low noise operation allows the device to be used with small external inductors and ceramic capacitors while still maintaining excellent efficiency. When not in use the device can be placed into a 'zero' quiescent mode via the shutdown pin.

In addition to soft-start control and current limiting, the CAT4134 include thermal shutdown protection. A dedicated overvoltage pin (OVP) allows the user to limit the maximum LED supply voltage.

  • Camera Flash
  • Color LCD Backlighting
  • Digital Still Cameras
  • Flash Lights
  • Dual Mode (Movie or Flash) operation
  • Independent Movie/Flash LED current control
  • Can drive 2, 3, 4 or 6 LEDs
  • High LED Current (250 mA max per channel)
  • Power efficiency up to 85%
  • Dual frequency mode 1.2 MHz and 900 kHz
  • Soft-start inrush current
  • Adjustable overvoltage protection
  • Thermal shutdown protection
  • Operating temperature range -40ºC to +85ºC

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CAT4134HV2-GT2

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Obsolete

CAD Model

Pb

A

H

P

TDFN-12

511AN

1

260

REEL

2000

N

5.5

500

3

2

Price N/A

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