onsemi
Webinar Date: August 7, 2024
Easy-to-use Switch Mode Power Supply Matrix
This post covers Key Takeaways and Frequently Asked Questions from the onsemi Easy-to-use Switch Mode Power Supply Matrix webinar regarding SMPS design & product selection. Whether you’re a seasoned professional or a curious newcomer, you’ll find plenty of valuable information watching the webinar. Links to the Webinar, Resources, and Related Content are provided within the post. A copy of the PowerPoint presentation will be provided for customers that register to watch the recorded webinar. All Snippets and Content Compliments of onsemi.
Many things plug in to a wall, from a coffee pot to a power tool, from a television to a blade server, and so forth. These all need a Switch Mode Power Supply (SMPS) designed to the application’s power requirements. These power requirements can range from a 10’s of watts to kWs. Where do you start?
Start with onsemi intelligent power.
A great general starting point for SMPS designs is onsemi’s SMPS matrix. It is organized by application power and includes controllers, gate drivers, and MOSFETs. This easy-to-use guide will help make product selection fast and easy based on customer application specifics. This matrix assumes typical VOUTs for the applications identified in this webinar.
Frequently Asked Questions
Why is a Power Factor Correction Controller needed?
- When the Switch Mode Power Supply is >75W, depending on the load, the current can be out of phase with the voltage resulting in unwanted harmonics traveling the AC mains which can degrade performance of other power supplies. For example, a vacuum cleaner without PFC can cause interference or visible noise on a television. PFC is basically a boost converter which helps align the voltage and current phases.
How does a Totem Pole Power Factor Correction (PFC) Controller differ from a regular Power Factor Correction (PFC) Controller?
- A regular PFC controller comes after a full wave rectifier circuit and acts as a boost to align the phases of voltage and current, reducing unwanted harmonics. A Totem Pole PFC does the exact same thing except you can jettison the full wave rectifier, saving space and improving efficiency. At any one time, for a regular PCF, there are always 3 devices in the conduction path. And at any one time for a totem Pole PFC, there are always 2 devices in the conduction path. 2 vs 3 devices mean less conduction losses and therefore higher efficiency.
Webinar Links and Resources
Webinar Registration Link:
DigiKey Webinar Center:
DigiKey TechForum Webinar Posts:
Supplier Center:
DigiKey onsemi Product Offerings:
Resources:
- All Content
- SMPS Matrix Chart & Block Diagram Usage Guide
- How to calculate Switch Mode Power Supply Design AC losses
- The Golden Rule of Board Layout for Switch-Mode Power Supplies
- Using a Switching Power Supply for Battery Charging
Example Webinar Slides
-Much more in-depth slides and a copy of the PowerPoint presentation will be provided for customers that register to watch the recorded webinar.
