H - Electricity – 02 – M
Patent
H - Electricity
02
M
30/21, 321/27, 3
H02M 3/335 (2006.01) H02J 7/02 (2006.01)
Patent
CA 1287105
ABSTRACT: Power-suuply arrangement. A flyback converter comprises the series arrangement of a primary winding (n1), a transistor switch (S1) and a resistor (R1) between two input terminals (1, 2) for receiving an input voltage. The series arrangement of a secondary winding (n2) and a diode (D1) is arranged between the output terminals (3, 4) for connecting a load (M). The transistor switch (S1) is controlled by pulses from a pulse-width modulator (10), a sawtooth voltage generated by an oscillator (20) being applied to a first input (11) and a first feedback voltage being applied to a second input (12) via a control amplifier (40), which feedback voltage is proportional to the difference between a referen- ce voltage from a reference source (30) and a fraction of the output voltage, and a second feedback voltage equal to the voltage across the resistor (R1) being applied to said second input via a capacitor (C1). (Fig. 1)
556893
Fetherstonhaugh & Co.
Koninklijke Philips Electronics N.v.
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