Analog Devices Inc. LT8374 Synchronous Step-Down LED Drivers

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.

Features

  • Low component count and simple solution
  • 6.5V to 60V wide input voltage range
  • 0V to 59V LED string voltage
  • ±3% LED current regulation
  • Spread-spectrum frequency modulation
  • Internal compensation capacitor
  • 20:1 analog, duty cycle, or PWM LED current control
  • 330kHz/2MHz fixed internal frequency (LT8374/LT8374-1)
  • External frequency synchronization
  • 4mm × 4mm 16-pin side solderable QFN package
  • AEC-Q100 qualified for automotive applications

Applications

  • Automotive lighting
  • Matrix LED lighting
  • General purpose LED driver
  • Current sources

Typical Appication

Application Circuit Diagram - Analog Devices Inc. LT8374 Synchronous Step-Down LED Drivers
Publicerad: 2023-04-12 | Uppdaterad: 2023-05-12