Patent ID: 9595875
Date: 2017-03-14
CPC Classifications: H02M

Claim:
1. A voltage drop compensation apparatus associated with voltage regulation in a flyback voltage converter, comprising: an output voltage sense circuit to couple to an output of the flyback voltage converter to generate an output voltage sense signal proportional to an output voltage generated by the flyback voltage converter; a regulation feedback controller coupled to the output voltage sense circuit to determine a voltage difference between the output voltage sense signal and a reference voltage and to generate a negative feedback control signal to send to a pulse width modulation (“PWM”) regulation controller, the negative feedback control signal to cause the PWM regulation controller to drive the flyback converter output voltage closer to a set-point determined by the reference voltage; and an output current proportional voltage divider to couple to a secondary winding of a flyback transformer associated with the flyback voltage converter for receiving an unrectified for converting the unrectified pulse waveform into a DC offset voltage to increase the reference voltage in proportion to a magnitude of current flow at the output of the flyback voltage converter and to increase a converter output voltage set-point to compensate for a voltage drop between the flyback voltage converter and a device powered by the flyback voltage converter without direct measurement of the output current.