Design Specifications
| Inputs |
Outputs #1 |
| VinMin = 9V |
Vout1 = 12 LEDs |
| VinMax = 36V |
Iout1 = 700 mA
(IC controls up to 1A) |
Design Description
The demonstration board includes a LM3429 device that converts 9VDC to 36VDC input to a 700mA constant current output designed to operate a load of three to four series LEDs. This reference design is ideal for any LED application that runs off of a 12V or 24V rail. This is a 4-layer board having input voltage and ground as the two internal planes. The design has been made assuming there are analog dimming requirements.
This design works with the Nuventix SynJet module which serves as the cooling element for an LED luminaire or bulb replacement for the standard MR16, PAR20, PAR25, PAR30 or PAR38 form factors
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Design Resources
Additional Product Resources
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LM3429
- N-Channel Controller for Constant Current LED Drivers |
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LM2842
- 300 mA/600 mA up to 42V Input Step-Down DC/DC Regulator in Thin SOT-23 |
- datasheet
- application notes
- Webench Online design tools
- samples
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Board Photo
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Features
- The LM3429 buck-boost LED driver:
- Allows input voltage capability of 9V-36V to accommodate 12V and 24V voltage rails for a variety of applications
- Drives 1-12 series connected LEDs up to 1A
- Enables analog dimming capability of 0 mA to 1A with a potentiometer or 1V to 10V dimming
- The LM2842 voltage regulator provides a regulated 5V power supply to the SynJet actuator
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Nuventix SynJet® High-Brightness LED Ref Design on 