onsemi NCP1910B65DWR2G: A High-Performance Combo Controller for Advanced SMPS Designs

The relentless pursuit of higher efficiency, greater power density, and enhanced reliability in Switch-Mode Power Supplies (SMPS) drives continuous innovation in semiconductor control ICs. Addressing these complex demands, onsemi introduces the NCP1910B65DWR2G, a highly integrated combo controller engineered to streamline the development of advanced AC-DC power converters. This device stands out by seamlessly combining a critical conduction mode (CrM) PFC controller with a quasi-resonant (QR) current-mode PWM controller on a single monolithic chip.

This integration is a significant architectural advantage. The CrM boost PFC front-end ensures near-unity power factor, minimizing reactive power and complying with stringent global energy regulations like EU CoC v5 and DoE Level VI. It operates at a fixed frequency in heavy-load conditions and transitions smoothly into frequency folding at light loads, thereby optimizing efficiency across the entire load range. The downstream QR flyback PWM controller leverages valley-switching technology to significantly reduce switching losses. By turning the MOSFET on when the drain voltage is at its minimum (a valley), it minimizes electromagnetic interference (EMI) and enhances overall system efficiency, making it ideal for high-output power adapters and auxiliary power supplies.

A key feature of the NCP1910B65DWR2G is its robust suite of protection features, which safeguards the power supply and the end-equipment. This includes comprehensive over-voltage protection (OVP), over-load protection (OLP), brown-out detection, and over-temperature protection. Furthermore, its proprietary soft-skips mode ensures low audible noise operation during light-load conditions, a critical requirement for consumer electronics.

The controller is designed for flexibility and ease of implementation. It supports a wide operating voltage range and provides precise control loops for both power stages. By reducing the external component count and simplifying the PCB layout, the NCP1910B65DWR2G enables designers to achieve a higher power density and accelerate time-to-market for products requiring power levels up to 250W.

ICGOODFIND: The onsemi NCP1910B65DWR2G is a superior combo controller solution that masterfully integrates PFC and QR flyback control. Its high level of integration, exceptional multi-mode efficiency, and comprehensive protective functions make it an outstanding choice for designers aiming to build compact, reliable, and high-performance SMPS for a wide array of modern electronic applications.

Keywords: Combo Controller, Critical Conduction Mode (CrM), Quasi-Resonant (QR) Operation, Power Factor Correction (PFC), High Power Density.