onsemi offers a range of tested solutions to design compact and efficient battery charger solutions from 65W to 600W and beyond. USB is used in battery chargers for power levels up to 240W making use of the extended power range and adjustable voltage supply options, in addition to the programmable power supply options available up to 100W. onsemi’s USB PD controllers combined with our medium voltage MOSFETs and load switches ensure good control of the output voltage and current requested by the device connected to the USB power supply.

From 240W up to 3kW, the combination of innovative totem-pole technology combined with multi-mode PFC control of EliteSiC MOSFETs/ GaN HEMTs enables a compact PFC stage with excellent efficiency from low to high load conditions.

Current mode high speed resonant LLC controllers and quasi-resonant controllers working with Elite SiC MOSFETs /GaN HEMTs enable compact conversion of the output of the PFC stage into the required output voltage, supported by the secondary side synchronous rectification controllers driving our best-in-class medium voltage MOSFETs. A third stage is sometimes used to provide a wider constant current voltage range.



650 V EliteSiC SiC MOSFETs are optimized for fast-switching high-efficiency topologies: Totem-pole PFC and LLC.

Multi-mode Totem-pole PFC

Multi-mode Totem-pole PFC

Multi-mode operation improves efficiency for different load conditions. Totem-pole PFC removes diode bridge improving efficiency.

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Evaluation/Development Kits


65 W, USB PD type-C PD3.0/ PPS charger solution evaluation board


100 W, USB Type-C PD3.0 / PPS charger solution


500W evaluation board with multimode power factor controller


High Performance 800 V Off-line Switcher with HV Startup and SenseFET Evaluation Board

Gate Drivers Plug-and-play Ecosystem

The gate driver plug-and-play ecosystem, which allows for the comparison of the dynamic performance and capabilities of different gate drivers and technologies, as for example NCP51705, FOD8334 or NCV57000.

NCP51561 Evaluation Board

Application daughter-card for NCP51561 5 kV isolated half-bridge gate driver

NCP1680 - Totem-pole CrM Controller Evaluation Board User's Manual

The NCP1680 Evaluation Board (EVB) user guide demonstrates a universal line, 300 W Totem-pole PFC built using NCP1680.

NCP1680 Design Calculator

This spreadsheet helps to compute main external components when designing a totel pole CrM PFC stage based on the NCP1680

NCP1681 Totem-pole Multi-Mode Controller Design Excel Calculator

This spreadsheet helps to compute main external components when designing a multimode PFC stage based on the NCP1681

NCP1681 Totem-pole CCM Controller Design Excel Calculator

This spreadsheet helps to compute main external components when designing a continuous conduction mode (CCM) based on the NCP1681

NCP1399x Design Tool

LLC resonant half-bridge converter design tools for NCP1399x

NCP1618 Design Worksheet

This spreadsheet helps to compute main external components when designing a multimode PFC stage based on the NCP1618

NCP134x Design Tool

This spreadsheet provides basic operating conditions and aid in component selection.

Technical Documents

Power Supply Solutions

In this paper, we will cover power supply basics and onsemi's solutions...

NCP1680 – CrM Totem-pole PFC IC Tips and Tricks

In this paper, we will go over basic Totem-pole PFC basic and power stage component selection criteria.

Totem-pole PFC Layout Considerations

This whitepaper will review layout challenges within a Totem-pole power factor converter (TPFC) and illustrate a way to overcome some of those challenges. Since TPFC is typically paired up with WBG devices such as GaN, this whitepaper will pay particular attention to its idiosyncrasies.

Meeting Challenging Efficiency Standards with Bridgeless Totem-pole Power Factor Correction

The input bridge rectifier found in almost all AC−DC power supplies contributes losses that present a challenge in achieving the highest possible efficiency figures. However, removing the traditional diode bridge, PFC FET and boost diode in favor of a bridgeless Totem-pole PFC arrangement enhances efficiency through the use of active switches.

3 kW Totem-pole PFC and Secondary-Side Regulated LLC Power Supply Using SiC MOSFETs

This paper will cover a solution using a SiC-based Totem-pole PFC followed by a secondary-side controlled LLC power supply, which is possible to achieve even higher power density and efficiency by using SiC MOSFETs in a Totem-pole PFC configuration.

Meeting Ultra-High-Density Design Challenges with GaN-Based 300 W Totem-pole PFC and LLC Power Supply

We will review an ultra-high-density 300 W power supply solution that replaces the input diode bridge using a Totem-pole PFC circuit. It uses an LLC converter with synchronous rectification and integrated driver GaN devices to enable 500 kHz switching on the LLC, dramatically reducing the inductor size.

SiC Simulator

We will explain the SiC simulation by leveraging the Physical and Scalable modeling technique, which take your simulation to the next level of accuracy.

Key Steps to Design A Compact, High-Efficiency PFC Stage Using NCP1623A

This paper describes the key steps to rapidly design a CrM/DCM PFC stage driven by the NCP1623, Critical Conduction Mode (CrM) Power Factor Correction Controller.

NCP1618 Tips and Tricks

This document addresses questions that can be raised when developing a NCP1618−driven PFC stage.

Half-Bridge LLC Resonant Converter Design Using NCP4390/NCV4390

IAmong many resonant converters, LLC resonant converter has been the most popular topology for high power density applications. This topology has many advantages over other resonant topologies

Key Steps to Design a Multimode PFC Stage Using the NCP1618A

This paper describes the key steps and provides the main equations useful to rapidly design a multimode PFC stage driven by the NCP1618A.