Journal
IEEE JOURNAL OF SOLID-STATE CIRCUITS
Volume 57, Issue 12, Pages 3816-3824Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSSC.2022.3199653
Keywords
ac-dc converter; dc-dc converter; high voltage (HV); light-load efficient; power density; silicon on insulator (SOI)
Categories
Funding
- X-FAB
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This work presents an offline power supply with fully integrated power stage in 0.18 Am 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(3) and 84% peak efficiency.
This work presents an offline power supply with fully integrated power stage in 0.18 Am 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(3) and 84% peak efficiency.
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