Power MOSFET switching dead time control method and apparatus
US6198263A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Oct 26, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/08122
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A dead time regulating apparatus is used in a switch mode power system. The apparatus, comprises a power MOSFET circuit with PMOS and NMOS devices. Driving means is connected for driving and for turning-on a delay in the MOSFETs. A time delay detecting means is connected for detecting dead time during MOSFET turn on and a pulse width comparing means is connected for receiving dead time signals and synchronous pulses for generating control signals. The control signals are directed to the driver means respectively for adjusting turn-on delays. The method of the invention provides precise dead time control in the MOSFET devices. The circuit drives the two MOSFET devices such that there is precise control of the dead time during on-off switching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.