Title:
SEMICONDUCTOR INTEGRATED CIRCUIT FOR POWER SUPPLY, AND POWER SUPPLY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/166389
Kind Code:
A1
Abstract:
A power supply IC (10[i]) in each of power supply devices is provided with a target transistor (32[i]) having an open drain configuration, and a constant current circuit (33[i]) for drawing a constant current via a power good terminal (PG[i]), and turns the target transistor off or on when the output voltage is normal or abnormal. The power good terminal of each power supply IC is commonly connected to a pulled-up target wire (WRpg). A power supply managing device (2) compares the voltage of the target wire with a plurality of determination voltages (Vth1, Vth2) to sense abnormality in each output voltage and connection failure of each power good terminal.
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Inventors:
MURAKAMI KAZUHIRO (JP)
Application Number:
PCT/JP2020/046324
Publication Date:
August 26, 2021
Filing Date:
December 11, 2020
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
H03K17/00; H02M1/00; H02M3/00
Foreign References:
| JP2014003786A | 2014-01-09 | |||
| JP2000321334A | 2000-11-24 | |||
| JP2011142554A | 2011-07-21 | |||
| JPH08152925A | 1996-06-11 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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