# US 2017/0288540 A1 · Digital voltage compensation for power supply integrated circuits > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0288540 A1 - Document ID: US20170288540A1 - Status: Published application - Kind: A1 - Application number: 15/620,509 - Filed: 2017-06-12 - Published: 2017-10-05 - Earliest claimed: 2013-03-15 - Assignees: Intersil Americas Inc. - Applicants: Intersil Americas LLC - Inventors: Robert H. ISHAM - Web page: https://patentgrep.com/patent/US20170288540A1 ## CPC - H02M 3/157: with digital control - G06F 1/26: Power supply means, e.g. regulation thereof (for memories G11C) - 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) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Systems and methods for digital voltage compensation in a power supply integrated circuit are provided. In at least one embodiment, a method comprises receiving a digital voltage code, the digital voltage code corresponding to an output voltage value; setting an output count on a first counter to change from a present first digital count corresponding to a present voltage code value toward a target first digital count corresponding to a new voltage code value; and setting a second count to an offset count value on a second counter when the new voltage code value is received. The method also comprises combining the second count with the output count to form a combined count value; and decrementing the second count value from the offset count value to zero when the first counter reaches the target first digital count. ## Claims ### Claim 1 A power supply providing an output voltage, the power supply comprising: an error amplifier controlling the power supply based on comparing a reference voltage with a feedback voltage representative of the output voltage; and a control circuit that receives a requested target for the output voltage and calculates an offset based on the requested target and a present target, the offset being used to modify the reference voltage such that the output voltage reaches the requested target within a specified time. ### Claim 2 (depends on 1) The power supply of claim 1, further comprising: a digital to analog converter (DAC) coupled to the error amplifier, the DAC providing the reference voltage to the error amplifier, wherein the control circuit provides a digital voltage code to the DAC, the DAC converting the digital voltage code into the reference voltage, wherein in response to the received requested target, the control circuit adds the offset to a normal code corresponding to the present target to obtain the digital voltage code that is provided to the DAC. ### Claim 3 (depends on 2) The power supply of claim 2, wherein the control circuit comprises a first counter, wherein in response to the received requested target, the first counter begins counting from a first count corresponding to the present target to a second count corresponding to the requested target. ### Claim 4 (depends on 3) The power supply of claim 3, wherein the control circuit comprises a second counter representative of the offset, wherein the second counter is combined with the first counter to obtain the digital voltage code. ### Claim 5 (depends on 4) The power supply of claim 4, wherein the second counter begins to decrement to zero when the first counter reaches the second count. ### Claim 6 (depends on 5) The power supply of claim 5, wherein the second counter decrements linearly with respect to time. ### Claim 7 (depends on 5) The power supply of claim 5, wherein the second counter decrements exponentially with respect to time. ### Claim 8 (depends on 1) The power supply of claim 1, wherein the offset is a function of a difference between the requested target and the present target. ### Claim 9 (depends on 8) The power supply of claim 8, wherein the function causes the offset to increase in response to an increased amount of the difference. ### Claim 10 A method for providing an output voltage, comprising: controlling a power supply based on comparing a reference voltage with a feedback voltage representative of the output voltage; receiving a requested target for the output voltage; calculating an offset based on the requested target and a present target; and using the offset to modify the reference voltage such that the output voltage reaches the requested target within a specified time. ### Claim 11 (depends on 10) The method of claim 10, further comprising: converting a digital voltage code into the reference voltage; in response to receiving the requested target, adding the offset to a normal code corresponding to the present target to obtain the digital voltage code that is converted into the reference voltage. ### Claim 12 (depends on 11) The method of claim 11, further comprising: in response to receiving the requested target, begin counting a first counter from a first count corresponding to the present target to a second count corresponding to the requested target. ### Claim 13 (depends on 12) The method of claim 12, further comprising: combining a second counter representative of the offset with the first counter to obtain the digital voltage code. ### Claim 14 (depends on 13) The method of claim 13, further comprising: begin decrementing the second counter to zero when the first counter reaches the second count. ### Claim 15 (depends on 14) The method of claim 14, wherein decrementing the second counter is performed linearly with respect to time. ### Claim 16 (depends on 14) The method of claim 14, wherein decrementing is performed exponentially with respect to time. ### Claim 17 (depends on 10) The method of claim 10, wherein the offset is a function of a difference between the requested target and the present target. ### Claim 18 (depends on 17) The method of claim 17, wherein the function causes the offset to increase in response to an increased amount of the difference.