Common Anode Capable High Brightness LED Driver With High Frequency Dimming

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.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM3433SQX/NOPB Texas Instruments Common Anode Capable High Brightness LED Driver with High Frequency Dimming 24-WQFN -40 to 125
LM3433SQ/NOPB Texas Instruments Common Anode Capable High Brightness LED Driver with High Frequency Dimming 24-WQFN -40 to 125
GA3252-AL Coilcraft Inc Power inductor, for NSC LM3433, toroid, 20% tol, SMT, RoHS
GA3252- Coilcraft Inc Power inductor, for NSC LM3433, toroid, 20% tol, SMT, RoHS
LM3433 's PackagesLM3433 's pdf datasheet
LM3433SQ LLP
LM3433SQX LLP




LM3433 Pinout, Pinouts
LM3433 pinout,Pin out
This is one package pinout of LM3433,If you need more pinouts please download LM3433's pdf datasheet.

LM3433 Application circuits
LM3433 circuits
This is one application circuit of LM3433,If you need more circuits,please download LM3433's pdf datasheet.


Related Electronics Part Number

Related Keywords:

LM3433 Pb-Free LM3433 Cross Reference LM3433 Schematic LM3433 Distributor
LM3433 Application Notes LM3433 RoHS LM3433 Circuits LM3433 footprint