# US 8,787,041 B2 · Power converter integrated with flyback converter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,041 B2 - Document ID: US8787041B2 - Status: Granted - Kind: B2 - Application number: 13/327,299 - Filed: 2011-12-15 - Published: 2012-06-21 - Granted: 2014-07-22 - Earliest claimed: 2010-12-16 - Assignees: Samsung Electro-Mechanics Co., Ltd.; Korea Advanced Institute of Science and Technology - Applicants: Chong Eun Kim; Don Sik Kim; Jae Kuk Kim; Gun Woo Moon; Shin Young Cho - Inventors: Chong Eun Kim; Don Sik Kim; Jae Kuk Kim; Gun Woo Moon; Shin Young Cho - Web page: https://patentgrep.com/patent/US8787041B2 ## CPC - H02M 3/33561: {having more than one ouput with independent control} - H02M 3/33592: {having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer} - H02M 1/0032: {Control circuits allowing low power mode operation, e.g. in standby mode} - Y02B 70/10: Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes - 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) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract There is provided a power converter integrated with an auxiliary converter. The power converter includes: a flyback converter converting an input power of a power supply input terminal into a standby power through a primary side circuit connected to the power supply input terminal and a secondary side circuit magnetically coupled to the primary side circuit to supply the standby power; and a main converter converting the input power of the power supply input terminal into a main power to supply the main power, and converting the input power of the power supply input terminal into the standby power through the secondary side circuit of the flyback converter to supply the standby power, whereby the efficiency of the power converter may be improved. ## Claims ### Claim 1 A power converter comprising: a flyback converter converting an input power of a power supply input terminal into a standby power through a primary side circuit connected to the power supply input terminal and a secondary side circuit magnetically coupled to the primary side circuit to supply the standby power; and a main converter converting the input power of the power supply input terminal into a main power to supply the main power, and converting the input power of the power supply input terminal into the standby power through the secondary side circuit of the flyback converter to supply the standby power, wherein the secondary side circuit of the flyback converter is integrated in the main converter, and wherein the main power and the standby power are respectively supplied through the main converter during a normal mode, and the standby power is supplied using the primary side circuit and the secondary side circuit of the flyback converter during a standby mode. ### Claim 2 (depends on 1) The power converter of claim 1, wherein the main converter includes: a bridge circuit in which both terminals of a first switching device and a second switching device connected in series are connected in parallel with the power supply input terminal and both terminals of a third switching device and a fourth switching device connected in series are connected in parallel with the power supply input terminal; a transformer having a primary side winding connected between a first node, which is a connection point between the first switching device and the second switching device, and a second node, which is a connection point between the third switching device and the fourth switching device and at least one secondary side winding magnetically coupled to the primary side winding; and an LC filter connected to the secondary side winding of the transformer. ### Claim 3 (depends on 2) The power converter of claim 2, further comprising a switching module for turning a current flowing in the secondary side winding of the transformer on/off. ### Claim 4 (depends on 2) The power converter of claim 2, wherein the secondary side circuit of the flyback converter is installed between both terminals of the secondary side winding of the transformer and both terminals of the LC filter. ### Claim 5 (depends on 4) The power converter of claim 4, further comprising an auxiliary switching device for turning a current flowing in the secondary side circuit of the flyback converter on/off. ### Claim 6 (depends on 5) The power converter of claim 5, wherein each of the first to fourth switching devices includes a parasitic capacitor and a body diode connected in parallel with each other. ### Claim 7 (depends on 6) The power converter of claim 6, wherein each of the first to fourth switching device is turned on after a voltage charged in the parasitic capacitor, included in each of the switching devices is completely discharged. ### Claim 8 (depends on 5) The power converter of claim 5, wherein the auxiliary switching device is turned on at the time at which the first switching device or the second switching device is turned on.