LM3424

Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design LM3424 SNVS603D – AUGUST 2009 – REVISED JULY 2019 LM3424 Constant Current N-channel Controller with Thermal Foldback For Driving LEDs 1 Features 1 VIN range from 4.5 V to 75 V High-side adjustable current sense 2-Ω, 1-A peak MOSFET gate driver Input undervoltage and output overvoltage protection PWM and analog dimming Cycle-by-cycle current limit Programmable soft-start and slope compensation Programmable, synchronizable switching frequency Programmable thermal foldback Precision voltage reference Low-power shutdown and thermal shutdown 2 Applications LED Drivers (buck, boost, buck-boost, and SEPIC) Indoor and outdoor area SSL General illumination Constant-current regulators 3 Description The LM3424 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. In addition, the LM3424 includes a thermal foldback feature for temperature management of the LEDs. This flexibility, along with an input voltage rating of 75 V, makes the LM3424 ideal for illuminating LEDs in a large family of applications. Adjustable high-side current sense allows for tight regulation of the LED current with the highest efficiency possible. The LM3424 uses standard peak current-mode control providing inherent input voltage feed-forward compensation for better noise immunity. It is ...