Analog DevicesLT8374RUFM-1#WPBFControlador LED

The LT8374/LT8374-1 devices feature fixed-frequency and peak current control. The LED current is programmed by a resistor from 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 ISP pin to FB pin.

The switching frequency 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.

Key Features and Benefits

• •  Low Component Count and Simple Solution
• •  Wide Input Voltage Range: 6.5V to 60V
• •  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

Evaluation Board

The LT8374/LT8374-1 can be evaluated with the EVAL-LT8374-AZ.