Patent ID: 6054738
Filing Date: 2000-04-25
Classification: H01L

Abstract:
An integrated circuit configuration for driving a field-effect-controllable power semiconductor component with a source, a gate, a drain, and a load connected to the source, comprising:a semiconductor body of a first conductivity type;a zone formed in said semiconductor body, said zone being connected to a drain terminal of a power semiconductor component;a well of a second conductivity type embedded in said zone;a control circuit connected between a gate terminal and a source terminal of the power semiconductor component and integrated in said well;said control circuit driving the gate terminal of the power semiconductor component with a gate potential higher than a drain potential thereof;a parasitic diode in said control circuit formed by a p-n junction between said well and said zone and disposed between the drain terminal and the source terminal of the power semiconductor component;a further diode connected in antiseries with said parasitic diode, said further diode including an additional zone of the first conductivity type embedded in said well and connected to the source terminal of the power semiconductor component; anda controllable switch having a load path connected in parallel with said further diode, said controllable switch conducting if the drain potential of the power semiconductor component is higher than a source potential thereof, and blocking if the source potential of the power semiconductor component is higher than the drain potential thereof.