# US 11,309,797 B2 · Voltage regulation system and method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,797 B2 - Document ID: US11309797B2 - Status: Granted - Kind: B2 - Application number: 17/006,241 - Filed: 2020-08-28 - Published: 2021-10-14 - Granted: 2022-04-19 - Earliest claimed: 2020-04-09 - Assignees: Nuvoton Technology Corporation - Applicants: Nuvoton Technology Corporation - Inventors: Chung-Ming Hsieh - Web page: https://patentgrep.com/patent/US11309797B2 ## CPC - H02M 3/158: including plural semiconductor devices as final control devices for a single load - H02M 1/0035: {using burst mode control} - H02M 3/156: with automatic control of output voltage or current, e.g. switching regulators - 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 A voltage regulation system utilizes a controller to select one of a continuous comparator and a discrete comparator to operate, making one of the continuous comparator and the discrete comparator output a pulse signal to the controller. The controller controls a switched power stage circuit to supply power to a load element. Through the aforementioned configuration, the switched power stage circuit adjusts the power supply based on the condition of the load element, thus decreasing the power loss of the switched power stage circuit. ## Claims ### Claim 1 A voltage regulation system, comprising: a switched power stage circuit configured to supply power to a load element, wherein a voltage on an output end of the switched power stage circuit is defined as an output voltage; a continuous comparator connected to the switched power stage circuit and configured to compare the output voltage and a reference voltage to output a pulse signal; a discrete comparator connected to the switched power stage circuit and configured to compare the output voltage and the reference voltage to output the pulse signal; a clock generator configured to output a clock signal to the discrete comparator, wherein the discrete comparator is operated based on the clock signal; and a controller connected between the discrete comparator and the switched power stage circuit and connected between the continuous comparator and the switched power stage circuit, wherein the controller controls the switched power stage circuit to supply power to the load element based on the pulse signal and selectively dynamically turns on one of the continuous comparator and the discrete comparator and turns off the other of the continuous comparator and the discrete comparator. ### Claim 2 (depends on 1) The voltage regulation system according to claim 1, wherein the controller comprises a counter, and when the continuous comparator is turned on and the discrete comparator is turned off, the counter counts a count value for an interval between the two continuous pulse signals, and when the count value is greater than a first threshold value, the controller turns off the continuous comparator and turns on the discrete comparator. ### Claim 3 (depends on 2) The voltage regulation system according to claim 2, wherein when the continuous comparator is turned off and the discrete comparator is turned on, the counter counts the count value for the interval between the two continuous pulse signals, and when the count value is smaller than a second threshold value, the controller turns on the continuous comparator and turns off the discrete comparator. ### Claim 4 (depends on 3) The voltage regulation system according to claim 3, wherein the second threshold value is smaller than the first threshold value. ### Claim 5 (depends on 3) The voltage regulation system according to claim 3, wherein the counter is configured to count based on the clock signal. ### Claim 6 (depends on 1) The voltage regulation system according to claim 1, wherein the continuous comparator and the discrete comparator are disposed independently of each other. ### Claim 7 A voltage regulation method, comprising: providing a switched power stage circuit to supply power to a load element, wherein a voltage on an output end of the switched power stage circuit is defined as an output voltage; selectively turning on one of a continuous comparator and a discrete comparator by using a controller, to compare the output voltage and a reference voltage to output a pulse signal, wherein the discrete comparator is operated based on a clock signal; and controlling the switched power stage circuit to supply power to the load element based on the pulse signal. ### Claim 8 (depends on 7) The voltage regulation method according to claim 7, wherein the controller comprises a counter, and the step of selectively turning on one of the continuous comparator and the discrete comparator by using the controller further comprises: when the continuous comparator is turned on and the discrete comparator is turned off, using the counter to count a count value for an interval between the two continuous pulse signals, and when the count value is greater than a first threshold value, using the controller to turn off the continuous comparator and turn on the discrete comparator. ### Claim 9 (depends on 8) The voltage regulation method according to claim 8, wherein the step of selectively turning on one of the continuous comparator and the discrete comparator by using the controller further comprises: when the continuous comparator is turned off and the discrete comparator is turned on, using the counter to count the count value for the interval between the two continuous pulse signals, and when the count value is smaller than a second threshold value, using the controller to turn on the continuous comparator and turn off the discrete comparator. ### Claim 10 (depends on 9) The voltage regulation method according to claim 9, wherein the second threshold value is smaller than the first threshold value. ### Claim 11 (depends on 9) The voltage regulation method according to claim 9, wherein the counter is configured to count based on the clock signal. ### Claim 12 (depends on 7) The voltage regulation method according to claim 7, wherein the continuous comparator and the discrete comparator are disposed independently of each other.