Dual output power supply

摘要

A single power supply provides at least one constant voltage output and at least one constant current output. The single power supply includes two or more switching power converters, such as flyback converters, that are independently controllable based on an error signal corresponding to the associated output. Further, one or more of the switching power converters can implement such control using primary-side feedback. The switching power converters can be flyback converters. Any switching power converters included the in the single power supply can both be part of a single PCB assembly, part of a single IC package, or part of a single monolith semiconductor die.

主权项

1. A power supply circuit, comprising:
a first power converter configured to produce a constant voltage output based on an input signal, the first power converter comprises a first switch and a first switch control circuit, wherein the first switch control circuit controls the first power converter in response to a first error signal for driving the first switch; and a second power converter configured to produce a constant current output based on the input signal, the second power converter comprises a second switch and a second switch control circuit, wherein the second switch control circuit controls the second power converter in response to a second error signal for driving the second switch, the second switch control circuit operated independent from the first switch control circuit.