A 110/230 V AC and 15–400 V DC 0.3 W Power-Supply IC With Integrated Active Zero-Crossing Buffer
- authored by
- Christoph Rindfleisch, Bernhard Wicht
- Abstract
This work presents an offline power supply with fully integrated power stage in 0.18 <inline-formula> <tex-math notation="LaTeX">$\mu$</tex-math> </inline-formula>m high-voltage (HV) CMOS silicon on insulator (SOI). It supports both ac–dc and dc–dc conversion from 15–400 V input down to 3.3–10 V output and is optimized for applications below 300 mW such as the Internet of Things (IoT), smart home, and e-mobility. An active zero-crossing buffer enables on-chip integration of the HV buffer capacitor. Below 150 V, constant on-time control is based on voltage intervals, sensed by ten HV threshold-detection circuits. Above 150 V, the converter operates in the resonant mode. It achieves a superior power density of 458 mW/cm<inline-formula> <tex-math notation="LaTeX">$^{3}$</tex-math> </inline-formula> and 84% peak efficiency.
- Organisation(s)
-
Mixed-Signal Circuits Section
- Type
- Article
- Journal
- IEEE Journal of Solid-State Circuits
- Volume
- 57
- Pages
- 3816-3824
- No. of pages
- 9
- ISSN
- 0018-9200
- Publication date
- 08.09.2022
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic version(s)
-
https://doi.org/10.1109/JSSC.2022.3199653 (Access:
Open)
