Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1984-11-23
1986-03-25
Salce, Patrick R.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323282, 323284, 323350, 323351, 363101, G05F 146
Patent
active
045786305
ABSTRACT:
In a buck-boost, switching regulator, separate signals are developed to control duty cycles of regulator switches. Control exercised by a pair of feedback-determined reference signal voltages through which a ramp signal is swept at inputs of separate comparators, comparator outputs control respective switches. A predetermined maximum voltage difference is permitted between the reference signal voltages. The reference used to control switching of one end of the regulator inductance is limited to a minimum voltage corresponding to a minimum duty cycle greater than 0% while the other reference is used to control the other end of that inductance and is limited to a maximum voltage corresponding to a minimum duty cycle less than 100%. A current limiting feedback from one of the switches is operated in response to current in excess of a predetermined level to force the ramp signal to a level corresponding to 0% duty cycle for both switches at the same time.
REFERENCES:
patent: 4245286 (1981-01-01), Paulkovich et al.
patent: 4395675 (1983-07-01), Toumani
AT&T Bell Laboratories
Ault Anita M.
Phelan Charles Scott
Salce Patrick R.
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