Switching regulator control circuit avoiding break-down of the switching element
US6300751A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 2000 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Aug 11, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
When an output impedance of an input power supply for a switching regulator is high, damages caused by a large current are suppressed which are given to switch elements employed in a power supply circuit and the switching regulator. In a step-up type switching regulator control circuit comprising at least an error amplifying circuit and a drive circuit of a switch element and producing an output voltage higher than an input voltage, the error amplifying circuit is operated by the input voltage; the drive circuit of the switch element is operated by the output voltage; the step-up type switching regulator control circuit is further comprised of a voltage detecting circuit operated by the output voltage; the voltage detecting circuit detects the input voltage, and when the input voltage is decreased lower than an arbitrary voltage, the voltage detecting circuit causes the drive circuit of the switch element to produce such a signal capable of firmly turning OFF the switch element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.