EDN

Power Tips #137: Implementing LLC current-mode control on the secondary side with a digital controller

Inductor-inductor-capacitor (LLC) serial resonant circuits, as shown in Figure 1, can achieve both zero voltage switching on the primary side and zero current switching on the secondary side in order ...
Electronic Design

High-Density AC-DC Power Supply is All-In on Digital Control

Dealing with power density through modularity. The value of a fully digital power supply relates to the data. Interpreting the data: The role of the power supply’s user interface. A fully digital and ...
EDN

Power Tips #138: 3 ways to close the control loop for totem-pole bridgeless PFC

Among all power factor correction (PFC) topologies, totem-pole bridgeless PFC provides the best efficiency; therefore, it is widely used in servers and data centers. However, closing the current ...
Electronic Design

Power Supply Controls AC-DC and DC-DC Conversion with Single MCU

A new reference design developed by ROHM Semiconductor uses a single microcontroller (MCU) to control both sides of the AC-DC power supply — the power-factor-correction (PFC) AC-DC converter stage and ...