초록 ▼

Remote power controllers for controlling power between an external power supply and a load include output stages including MOSFETs and a drive circuit connected to supply gate voltage of a preselected magnitude to each of the MOSFETs in response to a control signal. The magnitude of the gate voltage

Remote power controllers for controlling power between an external power supply and a load include output stages including MOSFETs and a drive circuit connected to supply gate voltage of a preselected magnitude to each of the MOSFETs in response to a control signal. The magnitude of the gate voltage corresponds to a predetermined maximum drain current for each of the MOSFETs, with the maximum drain current being substantially constant over the expected operating temperature range of the power controller. An overload signal representative of excessive power dissipation in the MOSFETs is sensed and a trip signal is produced when that overload signal exceeds a threshold limit. The drive circuit responds to the trip signal to remove the gate voltage signal from the MOSFETs.

대표청구항 ▼

A direct current power controller comprising' a first terminal for connection to an external power supply; a second terminal for connection to an external load; a first MOSFET, having a drain connected to said first terminal, a source connected to said second terminal and a gate; a drive circuit con

A direct current power controller comprising' a first terminal for connection to an external power supply; a second terminal for connection to an external load; a first MOSFET, having a drain connected to said first terminal, a source connected to said second terminal and a gate; a drive circuit connected to supply a gate voltage signal having a preselected magnitude to said gate in response to a control signal, thereby turning on said first MOSFET, wherein said preselected magnitude of gate voltage signal corresponds to a predetermined maximum drain current for said MOSFET, said maximum drain current being substantially constant over an expected operating temperature range of the power controller; means for producing an overload indicating signal representative of excessive power dissipation in said MOSFET; and means for producing a trip signal when said overload indicating signal exceeds a predetermined magnitude, said drive circuit being responsive to said trip signal to remove said gate voltage signal from said gate.