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
Videos
Related Development Tool
Analog Devices Inc. EVAL-LT8374-AZ LED Driver Evaluation Board
A complete evaluation board for the LT8374, a synchronous step-down LED driver.