Device and method for controlling a power switch
US5770967A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1996 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Jan 31, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/063
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to a charge-pump control circuit for a power transistor including a driver circuit connected to a first supply voltage through a diode and to a second voltage through a switch and a first load. The driver circuit is connected to the power transistor, and the power transistor is linked to a pump capacitor. The power transistor is connected between a further supply voltage and a second load. The control circuit of the invention further includes a control logic circuit connected between the first supply voltage and the second voltage. The control logic circuit is connected to the driver circuit and to the switch, and the switch is connected between the power transistor and the first load. The switch is also connected to the driver circuit, and to a circuit for checking the charged state of the pump capacitor which is connected between the switch and the control logic circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.