METHOD AND APPARATUS FOR INTEGRATED CABLE DROP COMPENSATION OF A POWER CONVERTER

摘要

A controller for a power converter includes a switching control circuit to output a drive signal to control switching of a switch to regulate the output power of the power converter, and output a switching signal representative of the drive signal. A cable drop compensator receives the switching signal, and outputs a compensated reference voltage signal to the switching control circuit. The cable drop compensator further includes a switching coefficient calculator to output a switching coefficient signal in response to the switching signal. The switching coefficient signal is representative of a ratio of a load current to a maximum deliverable load current. A voltage compensation calculator outputs the compensated reference voltage signal in response to the switching coefficient signal. The switching control circuit outputs the drive signal in response to the compensated reference voltage signal.

主权项

1. A controller for a power converter, the controller comprising:
a switching control circuit coupled to output a drive signal to control switching of a switch to regulate the output power of the power converter, and further coupled to output a switching signal representative of the drive signal; and a cable drop compensator coupled to receive the switching signal, and coupled to output a compensated reference voltage signal to the switching control circuit, wherein the cable drop compensator further comprises:
a switching coefficient calculator coupled to output a switching coefficient signal in response to the switching signal, wherein the switching coefficient signal is representative of a ratio of a load current to a maximum deliverable load current; anda voltage compensation calculator coupled to output the compensated reference voltage signal in response to the switching coefficient signal, wherein the switching control circuit is coupled to output the drive signal in response to the compensated reference voltage signal.