Power Supplies and Control Methods Suitable for Sequentially Transmitting Command Bits from Secondary Side

摘要

A control circuit suitable for a power supply. The power supply has a transformer with a primary winding and a secondary winding magnetically coupled to each other. The transformer is configured to transfer electric energy from a primary side to a secondary side and to build an output power source in the secondary side. The control circuit has a primary-side controller and a secondary-side controller. The primary-side controller is in the primary side, configured to control a current through the primary winding. In the secondary side, the secondary-side controller is powered by the output power source and configured to provide a command code with several command bits sequentially transmitted to the primary-side controller, so as to set an operation mode that the primary-side controller operates in.

主权项

1. A control circuit suitable for a power supply with a primary side and a secondary side galvanically isolated from each other, wherein the power supply comprises a transformer with a primary winding and a secondary winding magnetically coupled to each other, the primary winding and the secondary winding are located in the primary side and the secondary side respectively, and the transformer is configured to transfer electric energy from the primary side to the secondary side and to build an output power source in the secondary side, the control circuit comprising:
a primary-side controller in the primary side, configured to control a current through the primary winding; a secondary-side controller in the secondary side, powered by the output power source, configured to provide a command code with several command bits sequentially transmitted to the primary-side controller so as to set an operation mode that the primary-side controller operates in.