High-Voltage Power Conversion with the Microchip HV7802MG-G

In the realm of power electronics, the demand for efficient and compact high-voltage conversion solutions continues to grow across industries such as industrial automation, automotive systems, and consumer appliances. Addressing this need, the Microchip HV7802MG-G stands out as a high-voltage, switched-mode power supply (SMPS) controller that enables robust and flexible AC-DC or DC-DC power conversion.

This integrated circuit is engineered to operate with input voltages up to 700V, making it exceptionally suitable for applications directly offlined from high-voltage sources like AC mains or rectified DC buses. Its ability to function in such environments reduces the need for bulky and expensive pre-regulator circuits, thereby simplifying design and lowering overall system cost. The device incorporates a pulse-width modulation (PWM) controller with a fixed switching frequency, which ensures stable and predictable performance essential for noise-sensitive applications.

A key advantage of the HV7802MG-G is its high level of integration. It includes an internal high-voltage startup regulator, eliminating the requirement for an external low-voltage supply to initiate operation. This feature not only streamlines the bill of materials but also enhances reliability by reducing component count. Furthermore, the controller supports both flyback and forward converter topologies, providing designers with the flexibility to choose the most appropriate architecture for their specific power level and isolation requirements.

The device also emphasizes protection and safety. It integrates critical features such as cycle-by-cycle current limiting, which safeguards the power switch and load during overload conditions, and an undervoltage lockout (UVLO) that ensures proper operation only when the supply voltage is within a safe range. These built-in mechanisms contribute to the creation of robust power systems that adhere to stringent industry standards.

For implementation, the HV7802MG-G is offered in an 8-pin SOIC package, facilitating easy PCB layout and thermal management. Designers can leverage Microchip’s application notes and reference designs to accelerate development cycles, ensuring optimized performance for targets like low standby power or high efficiency across load variations.

ICGOODFIND: The Microchip HV7802MG-G is a highly integrated, high-voltage SMPS controller that offers design flexibility, reduced external component count, and robust protection features, making it an excellent choice for efficient and reliable power conversion systems.

Keywords:

High-Voltage Conversion, PWM Controller, Switched-Mode Power Supply, Flyback Converter, Integrated Circuit Protection