Power MOSFET driver with cross-conduction current reduction
US5281862A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1992 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Oct 13, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/001
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An output circuit includes a totem-pole output circuit for driving a power MOSFET. A pull-up circuit and a pull-down circuit drive the output node low or high as required. The circuit prevents the pull-up and pull-down circuits from simultaneously conducting current. The pull-up circuit has a pull-up threshold voltage and the pull-down circuit has a pull-down threshold voltage such that the pull-up circuit is turned off before the pull-down circuit is activated when the output node is switched from a high state to a low state and further wherein the pull-down circuit is turned off before the pull-up circuit is activated when the output node switches from a low state to a high state. The pull-up circuit is held off when the output node is switched from a high state to a low state by two diodes from the output node to an input of the pull-up circuit. The diodes are connected in series, one diode having its anode coupled to the output node and the cathode of the other diode coupled to the input of pull-up circuit. The pull-down circuit is cut off before the pull-up Darlington drives the output from low to high by having the pull-down threshold higher than the pull-up threshold. A resi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.