LM3424 Datasheet | Texas Instruments

Product Folder Order Now Technical Documents Tools & Software Support & munity Reference Design 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 pensation - 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 pensation for better noise immunity. It is designed to provide accurate thermal foldback with a programmable foldback breakpoint and slope. In addition, a 2.45V reference is...