# US 2014/0192566 A1 · Primary-side controlled programmable power converter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192566 A1 - Document ID: US20140192566A1 - Status: Published application - Kind: A1 - Application number: 14/046,085 - Filed: 2013-10-04 - Published: 2014-07-10 - Earliest claimed: 2013-01-08 - Assignees: System General Corp. - Applicants: System General Corporation - Inventors: Ta-Yung YANG - Web page: https://patentgrep.com/patent/US20140192566A1 ## CPC - H02M 3/33523: {with galvanic isolation between input and output of both the power stage and the feedback loop} - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) ## Abstract A circuit for controlling a programmable power converter is provided. The circuit comprises a control circuit, a switching controller, and a first opto-coupler. The control circuit generates a programmable voltage-reference signal for regulating an output voltage of the programmable power converter. A feedback circuit of the control circuit detects the output voltage for generating a feedback signal in response to the programmable voltage-reference signal and the output voltage. The switching controller detects a switching current of a transformer for generating a switching signal coupled to switch the transformer for generating the output voltage and an output current in response to the feedback signal and the switching current of the transformer. The first opto-coupler transfers the feedback signal from the control circuit to the switching controller. The control circuit is at the secondary side of the transformer and the switching controller is at the primary side of the transformer. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The circuit as claimed in claim 1, wherein said switching controller is coupled to detect a reflected signal of said transformer for regulating said output current of said programmable power converter in response to a demagnetizing time of said transformer. ### Claim 3 (depends on 1) The circuit as claimed in claim 1, wherein said switching controller is coupled to detect a reflected signal for performing an over-voltage protection in said switching controller. ### Claim 4 (depends on 3) The circuit as claimed in claim 3, further comprising a second opto-coupler for transferring a control signal of said control circuit to said switching controller. ### Claim 5 (depends on 4) The circuit as claimed in claim 4, wherein said control circuit further comprises: a digital-to-analog converter, generating a programmable over-voltage threshold for performing an over-voltage protection in said control circuit; wherein said feedback circuit comprises: an over-voltage protection circuit, coupled to generate said control signal by comparing said output voltage and said programmable over-voltage threshold; wherein said programmable over-voltage threshold will be reset to a minimum value whenever said programmable power converter is powered on, and said control signal is coupled to generate an over-voltage signal for disabling said switching signal. ### Claim 6 (depends on 4) The circuit as claimed in claim 4, wherein said control circuit further comprises: a micro-controller for programming said programmable voltage-reference signal and said control signal; wherein said control signal is coupled to control said switching controller via said second opto-coupler. ### Claim 7 (depends on 6) The circuit as claimed in claim 6, wherein said feedback circuit comprises: a watch-dog timer, coupled to receive a controlling signal from said micro-controller; wherein said watch-dog timer will generate an expired signal if said controlling signal is not generated in time periodically; and wherein said programmable over-voltage threshold will be reset to a minimum value in response to said expired signal. ### Claim 8 (depends on 6) The circuit as claimed in claim 6, wherein said control circuit further comprises: an analog-to-digital converter, coupled to detect said output voltage of said programmable power converter; wherein an output of said analog-to-digital converter is coupled to said micro-controller. ### Claim 9 (depends on 6) The circuit as claimed in claim 6, wherein said micro-controller has a memory circuit including a program memory and a data memory. ### Claim 10 (depends on 4) The circuit as claimed in claim 4, wherein said control circuit generates said control signal coupled to program an over-voltage threshold in said switching controller for an over-voltage protection of said output voltage of said programmable power converter. ### Claim 11 (depends on 10) The circuit as claimed in claim 10, wherein said control circuit generates said control signal coupled to control a current limit threshold in said switching controller for regulating said output current of said programmable power converter. ### Claim 12 (depends on 11) The circuit as claimed in claim 11, wherein said current limit threshold and said over-voltage threshold will be reset to respective minimum values whenever said programmable power converter is powered on. ### Claim 13 (depends on 11) The circuit as claimed in claim 11, wherein said current limit threshold and said over-voltage threshold will be reset to respective minimum values if said control signal is not generated in time. ### Claim 14 (depends on 4) The circuit as claimed in claim 4, wherein said control signal is modulated by pulse position modulation. ### Claim 15 (depends on 1) The circuit as claimed in claim 1, wherein said programmable voltage-reference signal will be reset to an initial value whenever said programmable power converter is powered on.