LM3424 Datasheet, PDF (34/50 Pages) National Semiconductor (TI) – Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs

Applications Information
The following designs are provided as reference circuits. For a specific design, the steps in the Design Procedure section should
be performed. In all designs, an RC filter (0.1 µF, 10Ω) is recommended at VIN placed as close as possible to the LM3424 device.
This filter is not shown in the following designs.
DESIGN #2 - BOOST Application
Features
• Input: 8V to 28V
• Output: 9 LEDs at 1A
• 65°C - 100°C Thermal Foldback
• PWM Dimming up to 30kHz
• 700 kHz Switching Frequency
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