Solid state power controller

Details Solid state power controller Solid state power controller

1988-07-06

1989-09-05

Salce, Patrick R.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323284, 323274, 307300, G05F 156

Patent

active

048642142

ABSTRACT:
A solid state power controller is provided with an output circuit having a transistor which is connected between a pair of output terminals. Base current to the transistor is provided by a drive circuit which includes a pair of series connected diodes that provide biasing to offset the drive circuit and output transistor base voltage drops. Load current is sensed and a DC bias current is supplied to the diode pair, with the DC bias current being proportional to the load current. For bi-directional operation, a second output transistor is connected in series with the first output transistor and a pair of reverse series connected diode are connected in a circuit branch which parallels the two output transistors. Junction points between the output transistors and the reverse series connected diode circuit branch are connected together to provide for bidirectional load current flow.

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patent: 4564769 (1986-01-01), Melamed
patent: 4569011 (1986-02-01), Bailey
patent: 4585986 (1986-04-01), Dyer
patent: 4588904 (1986-05-01), Glogolja

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