Understanding AC-DC Power Supplies
AC-DC switch mode power supplies are designed to provide DC power from AC line voltages. The reference designs below include information on Power Factor Correction (PFC), high-voltage-compatible bias generation and primary/secondary isolation. Our dsPIC® Digital Signal Controllers (DSCs) are designed to support power flow control of advanced topologies and the implementation of adaptive nonlinear algorithms for front-end power factor control converters and isolated DC-DC converters. You can use the same dsPIC DSC or an additional microcontroller (MCU) to perform the power management, monitoring, protection and internal and external communication functions in your AC-DC conversion design. These reference designs also include a microcontroller for control, monitoring, communications and intelligent automated functions.
AC-DC Conversion with Complete Digital Control
OCP Power Supply – SPDM Solution Demonstration Application
This demo application utilizes a dsPIC33C MPT secure DSC or dsPIC33C DSC in conjunction with the TA100 CryptoAutomotive™ security IC to implement the Security Protocol and Data Model (SPDM) specification. This enables a digital power solution that satisfies the security requirements for an OCP-compliant power supply.
750W AC/DC Reference Design
This design demonstrates a semi-bridgeless PFC topology followed by a peak current controlled Zero-Voltage Switching Full-Bridge (ZVS FB) converter with digital slope compensation to achieve very high conversion efficiencies. This design showcases live update capability for high-availability systems
Vienna 3-Phase Power Factor Correction (PFC) Reference Design
This design based on our 1200V Silicon Carbide (SiC) IC diodes, 700V SiC MOSFETs and dsPIC33CH DSC for digital control is suitable for applications like Hybrid Electric Vehicle (HEV)/Electric Vehicle (EV) chargers and high-power switch mode power supplies. It can achieve 98.6% efficiency at 30-kW output power.
Low-Voltage PFC Development Kit
The kit offers safe voltage levels at moderate power for designing algorithms on a boost power factor correction topology. These algorithms can be applied on real systems with minimal changes. This board utilizes the dsPIC33 DSC, supporting full digital and advanced power control algorithms.
PFC GaN Evaluation Board from Transphorm
Developed by Transphorm, the dsPIC33 DSC-based 4 kW bridgeless totem pole Power Factor Correction (PFC) evaluation board showcases AC-DC converter design using GaN FETs in the fast-switching leg and low-resistance MOSFETs in the slow-switching leg of a circuit for improved efficiency.
Platinum-Rated 720W AC/DC Reference Design
This ENERGY STAR® CSCI Platinum rated design demonstrates the flexibility and power of dsPIC33 DSC in SMPS designs, offering peak efficiency of 94.1%. It features a two-phase interleaved PFC boost converter followed by a two-phase interleaved two-switch forward converter with synchronous rectification.
Digital Power Interleaved PFC Reference Design
High-performance power supplies are used in applications including telecommunication and industrial equipment, televisions, air conditioners and other home appliances. These designs need PFC to improve efficiency, input power factor, voltage regulation and Total Harmonic Distortion (THD) of the input current.
dsPIC SMPS AC-DC Reference Design
This reference design provides an easy method to evaluate the power, and features of SMPS dsPIC Digital Signal Controllers for high-wattage AC-DC conversion application. Discover the many benefits of digital power control implementation in this reference design. The SMPS AC-DC Reference Design unit works with a universal input voltage range and produces multiple DC an input stage, intermediate stage and a Point of Load stage.
Would you like to learn more about the advantages of switching to digital power supplies? Click on the link below to download our Features, Value and Benefits of Digital Control for Power Supplies white paper.
AC-DC Converter Designs Made Easy
MPLAB® PowerSmart™ Development Suite
Accelerate the development of your AC-DC converter designs with the MPLAB PowerSmart Development Suite, a user-friendly design ecosystem that eliminates the need to manually write DSP-specific code for dsPIC33 DSCs.
Legend:
IC = Input Capture, OC = Output Compare, MCCP = Multiple Capture/Compare/PWM, SCCP = Single Capture/Compare/PWM, SMPS PWM = Power Supply Pulse Width Modulation