Power MOSFET with integrated drivers in a common package
View Patent ↗A driver stage consisting of an N channel FET and a P channel FET are mounted in the same package as the main power FET. The power FET is mounted on a lead frame and the driver FETs are mounted variously on a separate pad of the lead frame or on the main FET or on the lead frame terminals. All electrodes are interconnected within the package by mounting on common conductive surfaces or by wire bonding. The drivers are connected to define either an inverting or non-inverting drive.
1. A power MOSFET with an integrated P channel driver FET and an N channel driver FET in a common package; said common package comprising a lead frame that includes a plurality of terminals and a conductive support having extending terminals; said power MOSFET having a drain electrode fixed to said conductive support; said P channel and N channel driver FETs having respective gate, source and drain electrodes, one of said source or drain electrodes of each of said driver FETs connected at a node to define a series totem pole arrangement with the others of said source or drain electrodes of each of said driver FETS at the outer ends of said totem pole; the outer ends of said totem pole circuit connected to a V cc terminal and a ground terminal respectively; and a driver input control terminal connected to said gate electrodes of said P and N channel driver FETs; said power MOSFET having a source electrode connected to said ground terminal; said node between said N and P channel drivers driver FETs connected to the gate electrode of said power MOSFET; and a single, common insulation housing enclosing said power MOSFET, said conductive support and said N and P channel driver FETs; said extending terminals including a drain terminal which is connected to said power MOSFET drain electrode, and said plurality of terminals including said ground terminal, said V cc terminal and said driver input control terminal.
2. The device of claim 1 , wherein said conductive support comprises a lead frame.
3. The device of claim 1 , wherein the total area of said N and P channel driver FETs is about ¼ that of said power MOSFET.
4. The device of claim 2 , wherein the total area of said N and P channel driver FETs is about ¼ that of said power MOSFET.
5. The device of claim 1 , wherein one of said P and N channel driver FETs is mounted on the source electrode of said power FET.
6. The device of claim 2 , wherein one of said P and N channel driver FETs is mounted on the source electrode of said power FET.
7. The device of claim 2 1 , wherein one of said P and N channel driver FETs is mounted on one of said plurality of terminals.
8. The device of claim 1 , wherein said N and P channel driver FETs are integrated into a common chip.
9. The device of claim 2 , wherein said N and P channel driver FETs are integrated into a common chip.
10. The device of claim 2 1 , wherein said lead frame has first and second insulated pads; said power MOSFET supported on said first pad; at least one of said P and N channel driver FETs mounted on said second pad.
11. The device of claim 10 , wherein the total area of said N and P channel driver FETs is about ¼ that of said power MOSFET.
12. The device of claim 1 , wherein said source electrodes of said P and N channel driver FETs are connected at said node.
13. The device of claim 2 , wherein said source of said P and N channel driver FETs are connected at said node.
14. The device of claim 3 , wherein said source terminals of said P and N channel driver FETs are connected at said node.
15. The device of claim 1 , wherein said drain terminals of said P and N channel driver FETs are connected at said node.
16. The device of claim 2 , wherein said drain terminals of said P and N channel driver FETs are connected at said node.
17. The device of claim 3 , wherein said drain terminals of said P and N channel driver FETs are connected at said node.
18. A power MOSFET with an integrated P channel driver FET and an N channel driver FET in a common package; said common package comprising
a lead frame that includes a plurality of terminals and a conductive support having extending terminals; said power MOSFET having a drain electrode fixed to said conductive support; said P channel and N channel driver FETs having respective gate, source and drain electrodes, one of said source or drain electrodes of each of said driver FETs connected at a node to define a series totem pole arrangement with the others of said source or drain electrodes of each of said driver FETS at the outer ends of said totem pole; the outer ends of said totem pole circuit connected to a V cc terminal and a ground terminal respectively; and
a driver input control terminal coupled to said gate electrodes of said P and N channel driver FETs; said power MOSFET having a source electrode connected to said ground terminal; said node between said N and P channel driver FETs connected to the gate electrode of said power MOSFET; and a single, common insulation housing enclosing said power MOSFET, said conductive support and said N and P channel driver FETs; said extending terminals including a drain terminal which is connected to said power MOSFET drain electrode, and said plurality of terminals including said ground terminal and said V cc terminal.