LT3795HFE#PBF

LT®3795 is a DC/DC controller designed to regulate a constant-current or constant-voltage and is ideal for driving LEDs. It drives a low side external N-channel power MOSFET from an internal regulated 7.7V supply. The fixed frequency and current mode architecture result in stable operation over a wide range of supply and output voltages. Spread spectrum frequency modulation (SSFM) can be activated for improved electromagnetic compatibility (EMC) performance. The ground referred voltage FB pin serves as the input for several LED protection features, and also allows the converter to operate as a constant-voltage source. The maximum output current is set by an external resistor, and the output current amplifier has a rail-to-rail common mode range. The TG pin inverts and level shifts the PWM signal to drive the gate of the external PMOS. Typical applications are high power LED, high voltage LED, battery chargers, accurate current limited voltage regulators.

• Includes a separate input current sensing amplifier that is used to limit input current
• 3000:1 true colour PWM™ dimming, input and output current reporting
• PMOS switch driver for PWM and output disconnect, CTRL inputs linearly adjust LED current
• Internal spread spectrum frequency modulation, programmable input current limit
• ±2% constant voltage regulation, ±3% constant current regulation: 0V ≤ VOUT ≤ 110V
• Programmable open LED protection with active-low OPENLED flag
• Short-circuit protection and active-low SHORTLED flag, C/10 detection for battery charging
• Programmable undervoltage lockout with hysteresis, soft-start with programmable fault restart timer
• 28-lead plastic TSSOP package
• Temperature rating range from –40°C to 150°C

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