# US 12,015,332 B2 · Power supply and power saving method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,015,332 B2 - Document ID: US12015332B2 - Status: Granted - Kind: B2 - Application number: 17/580,603 - Filed: 2022-01-20 - Published: 2022-09-15 - Granted: 2024-06-18 - Earliest claimed: 2021-03-09 - Assignees: Fsp Technology Inc. - Applicants: Fsp Technology Inc. - Inventors: Chang-Hsun Chiang; Yung-Hsiang Shih - Web page: https://patentgrep.com/patent/US12015332B2 ## CPC - H02M 1/0035: {using burst mode control} - G01K 7/22: the element being a non-linear resistance, e.g. thermistor (G01K7/26 takes precedence) - G06F 1/26: Power supply means, e.g. regulation thereof (for memories G11C) - G06F 1/3206: Monitoring of events, devices or parameters that trigger a change in power modality - G06F 1/3296: by lowering the supply or operating voltage - H02M 1/0006: {Arrangements for supplying an adequate voltage to the control circuit of converters} - H02M 1/0032: {Control circuits allowing low power mode operation, e.g. in standby mode} - H02M 1/0054: {Transistor switching losses (periodically suspending operation of switching converter in low power mode H02M1/0035)} - H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters - H02M 1/42: Circuits or arrangements for compensating for or adjusting power factor in converters or inverters - H02M 1/4208: {Arrangements for improving power factor of AC input} - 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) - G01K: MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (radiation pyrometry G01J5/00) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A power supply and a power saving method thereof are provided. The power saving method includes: utilizing a monitoring circuit within the power supply to generate a monitoring signal according to operating loading of the power supply; and utilizing a control signal generating circuit within the power supply to generate a control signal according to the monitoring signal, to drive at least two switch transistors within a circuitry within the power supply, wherein the switch transistors are connected in parallel. ## Claims ### Claim 1 A power saving method of a power supply, comprising: utilizing a monitoring circuit within the power supply to generate a monitoring signal according to operating loading of the power supply; and utilizing a control signal generating circuit within the power supply to generate a control signal according to the monitoring signal, to drive at least two switch transistors within a circuitry within the power supply, wherein the switch transistors are connected in parallel; wherein the step of generating the control signal according to the monitoring signal to drive the switch transistors within the circuitry within the power supply comprises controlling a voltage level of the control signal according to the monitoring signal; wherein the step of controlling the voltage level of the control signal according to the monitoring signal comprises when the monitoring signal indicates that the power supply enters a light loading status, lowering the voltage level of the control signal which is configured to conduct the switch transistors by at least one-third. ### Claim 2 (depends on 1) The power saving method of claim 1, wherein the monitoring circuit is a temperature control circuit, and the monitoring signal is configured to indicate an operating temperature of the power supply. ### Claim 3 (depends on 1) The power saving method of claim 1, wherein the step of generating the control signal according to the monitoring signal to drive the switch transistors within the circuitry within the power supply comprises: controlling a number of conductive switch transistors among the switch transistors according to the monitoring signal. ### Claim 4 (depends on 3) The power saving method of claim 3, wherein the step of controlling the number of conductive switch transistors according to the monitoring signal comprises: when the monitoring signal indicates that the power supply enters a light loading status, conducting only one of the switch transistors. ### Claim 5 (depends on 1) The power saving method of claim 1, wherein the circuitry is a power factor correction circuit, a pulse-width modulation circuit or a synchronization rectification circuit. ### Claim 6 A power supply, comprising: a circuitry configured to execute a partial operation of the power supply, wherein the circuitry comprises at least two switch transistors, and the switch transistors are connected in parallel; a monitoring circuit configured to generate a monitoring signal according to operating loading of the power supply; and a control signal generating circuit coupled between the circuitry and the monitoring circuit, and configured to generate a control signal, according to the monitoring signal, to drive the switch transistors; wherein the control signal generating circuit controls a voltage level of the control signal according to the monitoring signal; wherein when the monitoring signal indicates that the power supply enters a light loading status, the control signal generating circuit lowers the voltage level of the control signal which is configured to conduct the switch transistors by at least one-third. ### Claim 7 (depends on 6) The power supply of claim 6, wherein the monitoring circuit is a temperature control circuit, and the monitoring signal is configured to indicate an operating temperature of the power supply. ### Claim 8 (depends on 6) The power supply of claim 6, wherein the control signal generating circuit controls a number of conductive switch transistors among the switch transistors according to the monitoring signal. ### Claim 9 (depends on 8) The power supply of claim 8, wherein when the monitoring signal indicates that the power supply enters an extremely light loading status, the control signal generating circuit conducts only one of the switch transistors. ### Claim 10 (depends on 6) The power supply of claim 6, wherein the circuitry is a power factor correction circuit, a pulse-width modulation circuit or a synchronization rectification circuit.