AC-DC Power Conversion and Controller ICs

Intended for use in secondary MCU-based systems, these ICs can be coupled with an MCU or a Digitally Enhanced Power Analog (DEPA) controller to enable an offline power conversion function without requiring a dedicated primary side supply.

Inde-Flux™ Technology
Würth Elektronik has licensed our Inde-Flux technology to create a power transformer combined with an isolated signal winding that can be used to implement isolated feedback in this type of system. When you combine this solution with the architectural capabilities of our AC-DC auxiliary controllers, you can create an array of unique and powerful systems controlled by secondary MCUs.

How Can Our Auxiliary Controllers Solve Your Design Challenges?

• Enable AC power without a dedicated primary supply
• Enable control of primary power with tight coupling to a secondary MCU
• Simplify AC power access with tighter functional integration using the Simplified Feedback Implementation

These controllers are designed for applications like battery chargers, proximity switches, television stand-by supplies and internal supplies for Switched-Mode Power Supplies (SMPSs) that call for a non-isolated, low-current DC power supply operating directly from the AC line. These types of systems do not require safety isolation because the internal electronics are not accessible by the end user. In these applications, an SMPS is far too complex and expensive, while a simple 60 Hz step-down transformer is cost effective but too large. Our inductor-less offline controllers provide a very cost-effective and compact solution for designs where line isolation is not necessary.

How Can Our Inductor-less Offline Controllers Solve Your Design Challenges?

• Enable small, non-isolated offline power supply design with no magnetics
• Ideal for single voltage range input with small load current (< 1W)
• Can power MCU directly from AC line without transformer stepdown

A unique input circuit allows these devices to self-start directly from a high-voltage input and  take the power to operate from one of the outputs of the converter it is controlling. This enables very efficient operation while maintaining input-to-output galvanic isolation that is only limited in voltage by the insulation system of the associated magnetic assembly.

This high-voltage, low-output current, adjustable linear regulator has a wide operating input voltage range of 13.2–450V. The output voltage can be adjusted from 1.20–440V provided that the input voltage is at least 12V greater than the output voltage.

High side current monitor ICs transfer a high side current measurement voltage to its ground-referenced output with an accurate voltage gain of one. The measurement voltage typically originates at a current sense resistor which is located in a “high side” circuit, such as the positive supply line.

Provides design suggestions for common circuit needs, estimates performance for common modifications, and can export to MPLAB^® Mindi™ Analog Simulator for verification.

Uses a SIMetrix / SIMPLIS environment to model circuit behavior, reducing design time with software debugging for initial design verification.

Provides advice on your exact physical circuit layout, sharing best practices from an experienced power supply designer, so that physical hardware will match simulations.