N-Channel Controller For Constant Current LED Drivers

The LM3429 is a versatile high voltage N-Channel MOSFET controller for LED Drivers . It CAN be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75V, makes the LM3429 ideal for illuminating LEDs in a very diverse, large family of applications. Adjustable high-side Current Sense voltage allows for tight regulation of the LED current with the highest efficiency pos- sible. The LM3429 uses Predictive Off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation. The LM3429 includes a High-Voltage startup Regulator that operates over a wide input range of 4.5V to 75V. The internal PWM Controller is designed for adjustable switching frequen- cies of up to 2.0 MHz, thus enabling compact solutions. Additional features include Analog dimming, PWM dimming, over-voltage protection, under-voltage lock-out, cycle-by-cy- cle current limit, and thermal shutdown. The LM3429 comes in a low profile, thermally efficient TSSOP EP 14-lead package. By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM3429MH/NOPB Texas Instruments N-Channel Controller for Constant Current LED Drivers 14-HTSSOP -40 to 125
LM3429MHX/NOPB Texas Instruments N-Channel Controller for Constant Current LED Drivers 14-HTSSOP -40 to 125
LM3429Q1MHX/NOPB Texas Instruments N-Channel Controller for Constant Current LED Drivers 14-HTSSOP -40 to 125
LM3429Q1MH/NOPB Texas Instruments N-Channel Controller for Constant Current LED Drivers 14-HTSSOP -40 to 125
MR16-PAR38LED-REF Texas Instruments MR16 or PAR38 LED Bulb Reference Design w/the LM3429 LED Driver and the Nuventix SynJet Coolers
LM3429 's PackagesLM3429 's pdf datasheet
LM3429MH TSSOP
LM3429MHX TSSOP




LM3429 Pinout, Pinouts
LM3429 pinout,Pin out
This is one package pinout of LM3429,If you need more pinouts please download LM3429's pdf datasheet.

LM3429 Application circuits
LM3429 circuits
This is one application circuit of LM3429,If you need more circuits,please download LM3429's pdf datasheet.


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