Control circuit of P-type power transistor
AssigneeWinbond Electronics Corp.
InventorsChen-Fan Tang, Jong-Ping Lee
Life of this patent
Estimating the term…
Abstract
A control circuit for P-type power transistor. The P-type power transistor includes a gate coupled between an input voltage and an output voltage. A first switch is coupled between a first voltage and the gate. A current source provides a first current, and is coupled to a second voltage. A second switch is coupled between the first switch, the gate and the current source. The voltage level of the gate is determined according to the first current when the first switch is turned off and the second switch is turned on.
Claims20
A control circuit for P-type power transistor, comprising:
- a P-type power transistor coupled between an input voltage and an output voltage, having a first gate;
- a first switch coupled between a first voltage and the first gate;
- a current source coupled to a second voltage for providing a first current;
- and
- a second switch coupled between the current source and a connection point of the first switch and the first gate, wherein a voltage level of the first gate is determined according to the first current when the first switch is turned off and the second switch is turned on.
A control circuit for P-type power transistor, comprising:
- a P-type power transistor coupled between an input voltage and an output voltage, having a first gate;
- a first switch coupled between a first voltage and the first gate;
- a current source coupled to a second voltage for providing a first current;
- and
- a second switch coupled between the current source and a connection point of the first switch and the first gate, wherein a voltage level of the first gate is determined according to a turn-on or turn-off of the second switch.
Dependencies are inferred from the claim text.