LT3754EUH#PBF

LT3754 is a 16-channel LED driver with a step-up DC/DC controller capable of driving upto 45V of LEDs. Each channel contains an accurate current sink with ±2.8% current matching. Channels follow a host programmable current to allow between 10mA to 50mA of LED current per string. Channels can be paralleled for higher LED current. Output voltage adapts to variations in LED VF for optimum efficiency and open LED faults do not affect the operation of connected LED strings. This device allows a PWM dimming range up to 3000:1 and an analogue dimming range upto 25:1. Operating frequency can be programmed from 100KHz upto 1MHz using a single resistor or synchronized to an external clock. Additional features include programmable maximum VOUT for open LED protection, a fault flag for open LED, programmable LED current derating vs temperature, micropower shutdown and internal soft-start. It is used in application such as automotive, notebook and TV monitor backlighting etc.

• Operating voltage range is 4.5V to 13V
• LED current regulated even for PVIN <gt/> VOUT
• Output adapts to LED VF for optimum efficiency
• Protection for LED pin to VOUT short
• Parallel channels for higher LED current
• Programmable LED current derating vs temperature
• Accurate undervoltage lockout threshold with programmable hysteresis
• Programmable frequency is 100KHz to 1MHz
• Operating junction temperature is -40°C to 125°C
• Package style is 32-lead plastic QFN

附註

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party