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LM3433 Datasheet

Part Number LM3433
Manufacturers National Semiconductor
Logo National Semiconductor
Description Common Anode Capable High Brightness LED Driver
Datasheet LM3433 DatasheetLM3433 Datasheet (PDF)

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 t.

  LM3433   LM3433






Part Number LM3433
Manufacturers Texas Instruments
Logo Texas Instruments
Description Common Anode Capable High Brightness LED Driver
Datasheet LM3433 DatasheetLM3433 Datasheet (PDF)

LM3433 www.ti.com SNVS535C – OCTOBER 2007 – REVISED MAY 2013 LM3433 Common Anode Capable High Brightness LED Driver with High Frequency Dimming Check for Samples: LM3433 FEATURES 1 •2 Operating Input Voltage Range of -9V to -14V w.r.t. LED Anode • Control Inputs 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 Sink Efficacy • No Output C.

  LM3433   LM3433







Common Anode Capable High Brightness LED Driver

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. An analog current control input is provided so the LM3433 can be adjusted to compensate for LED manufacturing variations and/or color temperature correction. The other input is a logic level PWM control of LED current. The PWM functions by shorting out the LED with a parallel switch allowing high PWM dimming frequencies. High frequency PWM dimming allows digital color temperature control, interference blanking, field sequential illumination, and brightness control. Additional 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 ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ano.


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