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LM3433 - Common Anode Capable High Brightness LED Driver

Description

The LM3433 is an adaptive constant on-time DC/DC buck (step-down) constant current controller (a true current source).

The LM3433 provides a constant current for illuminating high power LEDs.

Features

  • include thermal shutdown, VCC under-voltage lockout, and logic level shutdown mode. The LM3433 is available in a low profile LLP-24 package. Features.
  • Operating input voltage range of -9V to -14V w. r. t. LED.
  • anode Control inputs are referenced to the LED anode Output current greater than 6A Greater than 30kHz PWM frequency capable Negative output voltage capability allows LED anode to be tied directly to chassis for maximum heat si.

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LM3433 Common Anode Capable High Brightness LED Driver with High Frequency Dimming www.DataSheet4U.com November 26, 2007 LM3433 Common Anode Capable High Brightness LED Driver with High Frequency Dimming General Description The LM3433 is an adaptive constant on-time DC/DC buck (step-down) constant current controller (a true current source). The LM3433 provides a constant current for illuminating high power LEDs. The output configuration allows the anodes of multiple LEDs to be tied directly to the ground referenced chassis for maximum heat sink efficacy. The high frequency capable architecture allows the use of small external passive components and no output capacitor while maintaining low LED ripple current. Two control inputs are used to modulate LED brightness.
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