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Analog Devices LT8374 Synchronous Step-Down LED Drivers have fixed-frequency 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 common mode range from 0V to VIN, making the LT8374 ideal for matrix applications. An output voltage limit can be set with a resistor from the ISP pin to the FB pin.
The switching frequency for the Analog Devices LT8374 is set at 330kHz/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 0.2nF/0.9nF internal compensation capacitor and thermal shutdown.
