Primary-side controlled programmable power converter

A circuit for controlling a programmable power converter, comprising:

• a control circuit, generating a programmable voltage-reference signal for regulating an output voltage of said programmable power converter, wherein the control circuit comprises:
• a feedback circuit, coupled to detect said output voltage for generating a feedback signal in response to said programmable voltage-reference signal and said output voltage;
• a switching controller, coupled to detect a switching current of a transformer for generating a switching signal coupled to switch said transformer for generating said output voltage and an output current in response to said feedback signal and said switching current of said transformer;
• and
• a first opto-coupler, coupled to transfer said feedback signal from said control circuit to said switching controller;
• wherein said control circuit is at the secondary side of said transformer, and said switching controller is at the primary side of said transformer;
• and
• wherein said control circuit has a communication interface for communicating with external devices.