DC to DC converter with a single-fault tolerant clamp

Details DC to DC converter with a single-fault tolerant clamp DC to DC converter with a single-fault tolerant clamp

1997-11-13

1999-01-19

Hecker, Stuart N.

Electricity: power supply or regulation systems

Output level responsive

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

323223, 363 56, G05F 140

Patent

active

058617388

ABSTRACT:
A single-fault tolerant DC-to-DC converter having an output voltage clamp is capable of sourcing current to and sinking current from a load while maintaining a well regulated secondary bus voltage V.sub.bus. The clamp is disabled when the DC-to-DC converter is sourcing current so that all of the current is delivered to the load and is enabled when V.sub.bus exceeds a clamp set point voltage V.sub.clamp to sink the excess current and clamp V.sub.bus at V.sub.clamp. To provide single fault tolerance, the clamp includes a fault detection clamp element that is controlled by the DC-to-DC converter so that they operate mutually exclusively and a regulator clamp element whose resistance is set in a negative feedback control loop so that, when the fault protection clamp element is activated, both clamp elements sink the excess current and control the secondary bus voltage.

REFERENCES:
patent: 4420700 (1983-12-01), Fay et al.
patent: 4928200 (1990-05-01), Redl et al.
patent: 5365420 (1994-11-01), Cadman
patent: 5532626 (1996-07-01), Khayat
patent: 5594325 (1997-01-01), Manner
patent: 5691627 (1997-11-01), Shum

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