Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1994-03-18
1995-04-04
Dougherty, Thomas M.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
361 91, G05F 140
Patent
active
054040949
ABSTRACT:
A method and system of converting a wide range of DC input voltages from a DC power source to a substantially lower regulated DC output voltage is disclosed. A pulse width modulated (PWM) signal is generated from an applied DC input voltage to obtain a desired regulated DC output voltage. The PWM signal has a fixed frequency and a variable duty cycle. The PWM signal is filtered to provide a DC output voltage proportional to the amount of time the PWM signal spent in the ON or HIGH state. The duty cycle of the PWM signal is controlled based on an error signal generated by comparing an error voltage level that is proportional to the output voltage to a voltage reference. High voltage protection is provided to the controller during the period the PWM signal is in the OFF or LOW state.
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Green John D.
Hissong John B.
Thompson Michael L.
Dougherty Thomas M.
Holophane Lighting, Inc.
Nguyen Matthew V.
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