Title:
SWITCHING POWER SUPPLY, AND CONTROL CIRCUIT AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/176525
Kind Code:
A1
Abstract:
A control circuit 200 controls a switching power supply 100 that includes a switching transistor M1. A first switching detection pin TD1N is connected to a first node N1 in the switching power supply 100, and a second switching detection pin TD1P is connected to a second node N2 in the switching power supply 100. A time digital converter 210 generates a digital value Dtd indicating a time interval td between an observed edge of a first switching voltage Vs1 generated in the first switching detection pin TD1N and an observed edge of a second switching voltage Vs2 generated in the second switching detection pin TD1P. A DSP 220 generates a control pulse PWM instructing ON and OFF of the switching transistor M1 on the basis of at least the digital value Dtd.
Inventors:
SATO KOSUKE (JP)
KARASAWA SHINYA (JP)
KARASAWA SHINYA (JP)
Application Number:
PCT/JP2023/008153
Publication Date:
September 21, 2023
Filing Date:
March 03, 2023
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
H02M3/28
Foreign References:
| JP2021108522A | 2021-07-29 | |||
| JP2002369516A | 2002-12-20 | |||
| JP2011067042A | 2011-03-31 |
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
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