LT8374-1 Datasheet | Analog Devices

FEATURES n Low ponent Count and Simple Solution n Wide Input Voltage Range: 6.5V to 60V n 0V to 59V LED String Voltage n ±3% LED Current Regulation n Spread-Spectrum Frequency Modulation n Internal pensation Capacitor n 20:1 Analog, Duty Cycle or PWM LED Current Control n 330k Hz/2MHz Fixed Internal Frequency (LT8374/ LT8374-1) n External Frequency Synchronization n 4mm × 4mm 16-Pin Side Solderable QFN Package n AEC-Q100 Qualified for Automotive Applications APPLICATIONS n Automotive Lighting n Matrix LED Lighting n General Purpose LED Driver n Current Sources DESCRIPTION The LT®8374/LT8374-1 is a high efficiency, monolithic, synchronous step-down DC/DC converter with fixedfrequency and peak current control. The LED current is programmed by a resistor from the CTRL pin to ground or by applying a PWM signal to the CTRL pin. The current sense amplifier has a wide mon mode range from 0V to VIN, making the LT8374 ideal for matrix applications. An output voltage limit can be set with a resistor from ISP pin to FB pin. The switching frequency is set at 330k Hz/2MHz and can be synchronized to an external clock applied to the SYNC/ SPRD pin. With the optional spread-spectrum frequency modulation enabled, the frequency varies from 100% to 125% to reduce EMI. Additional features include an optional 0.2n F/0.9n F internal pensation capacitor and thermal shutdown. All registered trademarks and trademarks are the property of their respective owners. TYPICAL APPLICATION 1A Matrix LED Driver AVIN VIN 48V 47µF 10µF BST 22n F 68µH SW 768k 100mΩ MATRIX LED DRIVER 36VLED 1A MAX LED1 GND LT8374 22n F CTRL SYNC/SPRD INTVCC VC LED2 83741 TA01 10k 2.2µF 47p F LED11 LED12 LT8374 plus LT3967 Matrix Sequential Turn On/Off, 12 LEDs ILED 500m A/DIV VOUT 10V/DIV LT8374...