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CAT4240 - 6 Watt Boost LED Driver

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.

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 mA.
  • Open LED Overvoltage Protection.
  • Automatic Shutdown at 1.9 V (UVLO).
  • Thermal Overload Protection.
  • Thin SOT23 5.
  • lead (1 mm Max Height).

📥 Download Datasheet

Datasheet Details

Part number CAT4240
Manufacturer onsemi
File Size 180.89 KB
Description 6 Watt Boost LED Driver
Datasheet download datasheet CAT4240 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
CAT4240 6 Watt Boost LED Driver 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.
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