CAT4238TD-GT3 - 

LED Driver, Boost (Step Up), 2-5.5V input, 1 Output, 1 MHz switch-freq., 38V/450 mA out, TSOT-23-5

CAT4238TD-GT3 - LED Driver, Boost (Step Up), 2-5.5V input, 1 Output, 1 MHz switch-freq., 38V/450 mA out, TSOT-23-5

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Product Information

Boost (Step Up)
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Product Overview

The CAT4238TD-GT3 is a DC/DC Step-up Converter delivers an accurate constant current ideal for driving LEDs. Operation at a fixed switching frequency of 1MHz 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 40mA can be supported over a wide range of input supply voltages up to 5.5V, 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.
  • Drives high voltage LED strings (38V)
  • Up to 87% efficiency
  • Low quiescent ground current of 0.6mA
  • Adjustable output current
  • 1MHz Fixed frequency low noise operation
  • Soft start in-rush current limiting
  • Shutdown current less than 1µA
  • Open LED overvoltage protection
  • Automatic shutdown at 1.9V (UVLO)
  • Thermal overload protection


Sensing & Instrumentation, Consumer Electronics, Portable Devices

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