LM3421-Q1

Product Folder Order Now Technical Documents Tools & Software Support & Community LM3421-Q1, LM3423-Q1 SNVSB95 – JULY 2019 LM342x-Q1 N -Channel Controllers for Constant-Current LED Drivers 1 Features 1 AEC Qualified for Automotive Applications – Device Temperature Grade 1: −40°C ≤ TA ≤ 125°C (LM3421-Q1 and LM3423-Q1) – Device Temperature Grade 0: −40°C ≤ TA ≤ 150°C (LM3421-Q0 and LM3423-Q0) 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 Switching Frequency Zero Current Shutdown and Thermal Shutdown LED Output Status Flag (LM3423-Q1 and LM3423-Q0 Only) Fault Status Flag and Timer(LM3423-Q1 and LM3423-Q0 Only) 2 Applications LED Drivers: Buck, Boost, Buck-Boost, and SEPIC Indoor and Outdoor Area SSL Automotive General Illumination Constant-Current Regulators 3 Description The LM3421-Q1 and LM3423-Q1 family of devices are versatile high voltage N-channel MOSFET controllers for LED drivers. They can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75 V, makes the these controllers ideal for illuminating LEDs in a large family of applications. Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3421-Q1 and LM3423-Q1 device...