Flyback converter control with feed forward

Details Flyback converter control with feed forward Flyback converter control with feed forward

H - Electricity

02

M

321/26

H02M 3/335 (2006.01) G05F 5/00 (2006.01)

Patent

CA 1158716

Flyback Converter Control With Feed Forward Abstract A constant loop gain is achieved in a flyback type DC to DC converter by use of feedback to correct for load variations and feed forward to correct for line voltage variations. The feedback signal and a reference voltage are compared by an error amplifier. An output of the error amplifier is multiplied by a constant and is added to a signal proportional to line voltage. The resulting sum causes modification of the slope of a ramp voltage which is compared to the voltage at the output of the error amplifier to control the "on" times of the con- verter switching devices. AT9-80-009

376931

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