Semiconductor device for switching power supply control and AC-DC converter
US10978945B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2019 |
| Grant date | Apr 13, 2021 |
| Priority date | — |
| Expiry date | Nov 6, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a semiconductor device for switching power supply control including: a power supply terminal; a current inflow terminal; a starting circuit; and a brownout detection circuit, wherein a control signal of a switching element is generated, the starting circuit includes: a first comparator; a starting control circuit which controls on and off of the switch; and an operation start circuit which detects that the voltage of the power supply terminal becomes equal to or more than a predetermined voltage, and generates a signal for operating an internal circuit, and the brownout detection circuit includes: a voltage divider; a second comparator which has a hysteresis characteristic for detecting generation of a brownout state; a timer circuit which measures a predetermined time during which the generation of the brownout state continues; and an output stop circuit which stops outputting of a switching control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.