LM3429BKBSTEVAL: 1A @ 28V Max, 10 ~ 70V in

Summary

This wide range evaluation board showcases the LM3429 NFET controller used with a buck-boost current regulator. It is designed to drive 4 to 8 LEDs at a maximum average LED current of 1A from a DC input voltage of 10 to 70V.

The evaluation board showcases most features of the LM3429 including PWM dimming, overvoltage protection and input under-voltage lockout. It also has a right angle connector (J7) which can mate with an external LED load board allowing for the LEDs to be mounted close to the driver. Alternatively, the LED+ and LED- banana jacks can be used to connect the LED load.

The buck-boost circuit can be easily redesigned for different specifications by changing only a few components (see the Alternate Designs section found at the end of this application note).

Specifications

Manufacturer	Texas Instruments
Category	Lighting
Sub-Category	LED Drivers - DC In
Eval Board Part Number	296-LM3429BKBSTEVAL/NOPB-ND
Eval Board Supplier	Texas Instruments
Eval Board	Normally In Stock
Voltage In	10 ~ 70 V
Topology	Step Up/Down
Current Out	1 A
Voltage Out (Max)	28 V
Outputs and Type	1 Non-Isolated
Efficiency @ Conditions	>88%, 14 ~ 28V in, 6 LEDs @ 1 A >79%, 10 ~ 70V in, 6 LEDs @ 1 A
Features	Dimming Control Over Voltage Protection Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	700 kHz
Component Count + Extras	34 + 12
Design Author	Texas Instruments
Application / Target Market	Automotive Lighting: LED Home Lighting Lighting: LED Signage
Main I.C. Base Part	LM3429
Date Created By Author
Date Added To Library	2011-03