# US 9,007,041 B2 · Controller for protectively reducing an output of a converting circuit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,007,041 B2 - Document ID: US9007041B2 - Status: Granted - Kind: B2 - Application number: 13/693,990 - Filed: 2012-12-04 - Published: 2014-06-05 - Granted: 2015-04-14 - Earliest claimed: 2012-12-04 - Assignees: Green Solution Technology Co., Ltd. - Applicants: Green Solution Technology Co., Ltd. - Inventors: Li-Min Lee; Chung-Che Yu; Shian-Sung Shiu; Quan Gan - Web page: https://patentgrep.com/patent/US9007041B2 ## CPC - G05F 1/595: semiconductor devices connected in series - H02M 1/32: Means for protecting converters other than automatic disconnection - H02M 3/156: with automatic control of output voltage or current, e.g. switching regulators - G05F: SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES - 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 controller for protectively reducing an output of a converting circuit includes a feedback circuit, a logic control circuit, an over-state judgment circuit, and a protection control circuit, is disclosed. The feedback circuit generates a modulation signal according to an output of a converting circuit. The logic control circuit is coupled to the feedback circuit and controls the converting circuit according to the modulation signal for stabilizing the output of the converting circuit. The over-state judgment circuit receives an over-state reference signal and a detecting signal, and generates a protection signal in response to levels of the detecting signal and the over-state reference signal. The protection control circuit is coupled to the logic control circuit and the over-state judgment circuit and controls the logic control circuit to lower the output of the converting circuit when receiving the protection signal. ## Claims ### Claim 1 A controller for protectively reducing an output of a converting circuit, the controller comprising: a feedback circuit, generating a modulation signal in response to an output of a converting circuit; a logic control circuit, coupled to the feedback circuit and controlling the converting circuit according to the modulation signal for stabilizing the output of the converting circuit; an over-state judgment circuit, receiving a detecting signal, and generating a protection signal when a level of the detecting signal is higher than a first predetermined value, and stopping generating the protection signal when the level of the detecting signal is lower than a second predetermined value, wherein the first predetermined value is larger than the second predetermined value; and a protection control circuit, coupled to the logic control circuit and the over-state judgment circuit and controlling the logic control circuit to reduce the output of the converting circuit when receiving the protection signal. ### Claim 2 (depends on 1) The controller according to claim 1, further comprising an energy discharging circuit which is coupled to the over-state judgment circuit, wherein the converting circuit has an output capacitance configured to store an electric energy for providing the output, and the energy discharging circuit is directly coupled to the output capacitance and provides an energy discharging path for discharging the electric energy stored by the output capacitance when receiving the protection signal. ### Claim 3 (depends on 2) The controller according to claim 2, wherein the over-state judgment circuit is an over-voltage judgment circuit, and the detecting signal is an output voltage of the converting circuit, and the first predetermined value is a first predetermined over-voltage value, and the second predetermined value is a second predetermined over-voltage value. ### Claim 4 (depends on 2) The controller according to claim 2, wherein the over-state judgment circuit is an over-temperature judgment circuit, and the detecting circuit is an operating temperature, and the first predetermined value is a first predetermined over-temperature value, and the second predetermined value is a second predetermined over-temperature value. ### Claim 5 (depends on 2) The controller according to claim 2, wherein the over-state judgment circuit is an over-current judgment circuit, and the detecting signal is a current of the converting circuit, and the first predetermined value is a first predetermined over-current value, and the second predetermined value is a second predetermined over-current value. ### Claim 6 (depends on 5) The controller according to claim 5, further comprising an over-temperature judgment circuit, which reduces the first predetermined over-current value and the second predetermined over-current value when an operating temperature of the controller is higher than a first predetermined over-temperature value, and stops reducing the first predetermined over-current value and the second predetermined over-current value when the operating temperature of the controller is lower than a first predetermined over-temperature value. ### Claim 7 (depends on 1) The controller according to claim 1, wherein the over-state judgment circuit is an over-voltage judgment circuit, and the detecting signal an output voltage of the converting circuit, and the first predetermined value is a first predetermined over-voltage value, and the second predetermined value is a second predetermined over-voltage value. ### Claim 8 (depends on 1) The controller according to claim 1, wherein the over-state judgment circuit is an over-temperature judgment circuit, and the detecting signal is an operating temperature, and the first predetermined value is a first predetermined over-temperature value, and the second predetermined value is a second predetermined over-temperature value. ### Claim 9 (depends on 1) The controller according to claim 1, wherein the over-state judgment circuit is an over-current judgment circuit, and the detecting circuit is a current of the converting circuit, and the first predetermined value is a first predetermined over-current value, and the second predetermined value is a second predetermined over-current value. ### Claim 10 (depends on 9) The controller with according to claim 9, further comprising an over-temperature judgment circuit, which reduces the first predetermined over-current value and the second predetermined over-current value when an operating temperature of the controller is higher than a first predetermined over-temperature value, and then stops reducing the first predetermined over-current value and the second predetermined over-current value when the operating temperature of the controller is lower than a second predetermined over-temperature value, wherein the first predetermined over-temperature value is greater than the second predetermined over-temperature value. ### Claim 11 A controller for protectively reducing an output of a converting circuit, the controller comprising: a feedback circuit, generating a modulation signal in response to an output of a converting circuit; a logic control circuit, coupled to the feedback circuit and controlling the converting circuit according to the modulation signal for stabilizing the output of the converting circuit; an under-state judgment circuit, receiving an under-state reference signal and a detecting signal, executing a time-counting process when a level of the detecting signal is lower than a level of the under-state reference signal, and generating a protection signal when the counted time reaches a predetermined time period; and a protection control circuit, coupled to the logic control circuit and the under-state judgment circuit, and controlling the logic control circuit to stop the converting circuit when receiving the protection signal. ### Claim 12 (depends on 11) The controller according to claim 11, wherein the under-state judgment circuit is an under voltage judgment circuit, which generates the protection signal when an output voltage of the converting circuit is lower than a predetermined under voltage value. ### Claim 13 (depends on 12) The controller according to claim 12, wherein the under-state judgment circuit further comprises a blanking circuit which stops the under-state judgment circuit to generate the protection signal during a soft-start period time of the controller. ### Claim 14 (depends on 11) The controller according to claim 11, wherein the under-state judgment circuit further comprises a blanking circuit which stops the under-state judgment circuit to generate the protection signal during a soft-start period time of the controller.