LT3752MPFE-1

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The LT3752MPFE-1 is a wide input voltage range, active clamp forward controller with an integrated high side MOSFET designed for high power, high frequency DC-DC conversion. It is one of the most efficient and powerful controllers in the market, with both output voltage and current are adjustable through a control circuit. To further accelerate design effort, the device itself is highly integrated, featuring high-voltage start up circuitry, current sense amplifier, and additional goodies such as a power good indication and softstart features.

The LT3752MPFE-1 belongs to the PMIC (Power Management Integrated Circuit) family of DC-DC switching controllers, specifically to the Voltage Regulators and DC-DC Switching Controllers category. It is designed to produce high current power conversion, able to deliver up to 15A with a limited junction temperature of 125℃. It offers a wide 4.5V to 38V input voltage range and programmable 250kHz to 1MHz operating frequency, a fully integrated MOSFET and low-side RDS(ON) sensing for current sharing in multi-phase applications, allowing loss optimized solutions. The device also features a maximum switching frequency of 750kHz for higher frequency, medical and automotive applications.

The LT3752MPFE-1 adopts an active clamp forward topology, it carries a sensing resistor connected from the drain pin of the MOSFET to the output, so when the output voltage goes down, the sensored voltage will be increased, forcing the voltage divider made up of boot-strap capacitor and compensation resistor to lower the gate voltage at the same time, turning on the high-side MOSFET and boosts the output voltage.

The device also comes with a few extra options such as power good indication, frequency synchronization pins, power limit comparator, thermal shutdown and under voltage lockout. These options give the circuit designer more flexibility and control over the system design, and make LT3752MPFE-1 a robust, efficient and reliable solution for high power DC-DC conversion.

To sum up, the LT3752MPFE-1 is a high power, wide input voltage range, active clamp forward controller with an integrated high side MOSFET, applicable for high power, high frequency DC-DC conversion. It is one of the most efficient and powerful controllers in the market, featuring its low-side RDS(ON) sensing for current sharing as well as several additional protection features. With its fully integrated MOSFET, wide input voltage range, programmable operating frequency and adjustable current and voltage, the LT3752MPFE-1 belongs to the PMIC family of DC-DC switching controllers, specifically to the Voltage Regulators and DC-DC Switching Controllers category.

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