A Fully Integrated Switched-Capacitor-Based AC–DC Converter for a 120 V_RMS Mains Interface

Abstract

A fully integrated AC-DC power converter that faces a mains voltage of 120 V RMS , 60 Hz is presented. The converter achieves an increased operating range and efficiency due to a switching capacitor which relies on the principles of charge redistribution and the memory effect. As such, the converter mimics a variable voltage division to bridge the voltage gap between the high mains and low DC-output. Customized ACswitches and a high-voltage capacitor ensure the high voltage capability. The AC-DC power converter is designed in a 0.35 µm-CMOS technology and achieves an output power of 15.16 µW at peak efficiency of 80.7 % on an active area of 9.8 mm 2 .

A Fully Integrated AC-DC Converter in 1 V CMOS for Electrostatic Vibration Energy Transducer with an Open Circuit Voltage of 10 V

“…A high power efficiency of 85% was realized by the buck converter. In [10], another AC-DC converter was presented, which was composed of capacitor divider, switched capacitor converter, and FBR to convert power from 120 V mains. Wiring capacitors were used to manage a high voltage of 168 V without adding extra process steps or devices.…”

A 110/230 V AC and 15–400 V DC 0.3 W Power-Supply IC With Integrated Active Zero-Crossing Buffer

“…Fig. 2 shows the peak efficiency at ac input versus the power density of the stateof-the-art publications [1], [2], [3], [4], [5] and commercially available power modules [6], [7], [8] in comparison to the converter presented in this work. Prior art publications suffer from a poor power density <50 mW/cm 3 or a low efficiency ≤30%.…”

“…Prior art publications suffer from a poor power density <50 mW/cm 3 or a low efficiency ≤30%. They use capacitive [1], [2], [3], resistive [4], or direct coupling [5] in the ac interface.…”

Improved “K” type seven‐level switched capacitor inverter topology with Self‐voltage balancing

“…In recent years, the various topologies for switched‐capacitor converters have received special attention from the researchers because they have a lower number of power components (see other studies 4–25 ). Generally, the switched capacitor‐based power converters are classified into four categories: (a) AC/direct current (DC) power converters, 9,10 (b) AC/AC power converters, 11,12 (c) DC/DC power converters, 13,14 and (d) DC/AC power converters. Furthermore, the voltage balancing of flying or floating capacitor of the switched capacitor MLI (SCMLI) topologies are also classified into two categories: (a) active voltage balancing and (b) natural voltage balancing.…”