The LT3795EFE#PBF 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 can be activated for improved electromagnetic compatibility 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 LT3795 also includes a separate input current sensing amplifier that is used to limit input current. The TG pin inverts and level shifts the PWM signal to drive the gate of the external PMOS.
3000:1 True colour PWM? dimming
Input and output current reporting
PMOS switch driver for PWM and output disconnect
Internal spread spectrum frequency modulation
Programmable input current limit
CTRL inputs linearly adjust LED current
Programmable open LED protection with OPENLED flag
Short-circuit protection and SHORTLED flag
Programmable under-voltage lockout with hysteresis
(EN)
