LT3756EMSE-2#PBF

LT3756-2 is DC/DC controller, designed to operate as a constant-current source for driving high current LEDs. It drives a low side external N-channel power MOSFET from an internal regulated 7.15V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. A ground referenced voltage FB pin serves as the input for several LED protection features, and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100KHz to 1MHz to optimize efficiency, performance or external component size. The device sense output current at the high side of the LED string. High side current sensing is the most flexible scheme for driving LEDs, allowing boost, buck mode or buck-boost mode configuration. Applications include high power LED applications, current limited constant voltage applications and battery charging.

• 3000:1 true colour PWM™ dimming
• Wide input voltage range from 6V to 100V, output voltage up to 100V
• Constant-current and constant-voltage regulation
• 100mV high side current sense
• Drives LEDs in boost, buck mode, buck-boost mode, SEPIC or flyback topology
• Adjustable frequency range from 100KHz to 1MHz, open LED protection
• Programmable undervoltage lockout with hysteresis
• Improved open LED status pin, PWM disconnect switch driver, CTRL pin provides analogue dimming
• Low shutdown current of <lt/>1µA, programmable soft-start
• 16-lead plastic MSOP package, -40°C to 125°C temperature range

Notes

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