CN-115149566-B - Power supply, filter control and dynamic adaptive voltage positioning

Abstract

The present disclosure relates to power supply, filter control, and dynamic adaptive voltage positioning. An apparatus includes a filter to receive a signal indicative of a current provided by an output voltage to power a dynamic load. The filter generates a filtered signal from the received signal. The reference voltage generator generates a target set point voltage based on the filtered signal. The target set point voltage is used to control (e.g., regulate) the magnitude of the output voltage. The apparatus further includes a filter controller for dynamically changing the operational settings of the filter. For example, the filter controller reduces the bandwidth of filtering the signal in response to detecting that i) the magnitude of the output voltage falls below an output voltage threshold and ii) the magnitude of the received VID value is greater than the VID threshold.

Inventors

• YOU ZHIQING
• 5. Srinivas

Assignees

• 英飞凌科技奥地利有限公司

Dates

Publication Date

20260505

Application Date

20220328

Priority Date

20210329

Claims (20)

1. 1. An electronic device, comprising: a filter for receiving a signal indicative of a magnitude of a current provided by the output voltage to power the dynamic load, the filter producing a filtered signal from the received signal; a reference voltage generator for generating a target set point voltage based on the filtered signal, the target set point voltage being used to control the magnitude of the output voltage, and A filter controller for dynamically changing an operational setting of the filter; wherein the controller comprises a first comparator and a second comparator; Wherein the first comparator is operative to compare the magnitude of the output voltage with an output voltage threshold, and Wherein the second comparator is operative to compare the magnitude of the voltage identification value received from the dynamic load with a preset voltage identification threshold.
2. 2. The apparatus of claim 1, wherein the target set point voltage is selected by an adaptive voltage positioning function.
3. 3. The apparatus of claim 1, wherein the reference voltage generator is operative to control the operational setting of the filter based on a magnitude of the output voltage and a magnitude of a voltage identification value received from the dynamic load.
4. 4. The device of claim 1, wherein the controller is operative to adjust the operational setting of the filter based on a magnitude of the output voltage.
5. 5. The apparatus of claim 1, wherein the controller is operative to adjust the operational setting of the filter based on a change in a magnitude of a voltage identification value received from the dynamic load.
6. 6. The apparatus of claim 1, wherein the operational setting of the filter comprises a bandwidth for filtering the signal, and Wherein the controller is operative to reduce the bandwidth of filtering the signal in response to detecting i) the magnitude of the output voltage crossing the output voltage threshold and ii) the magnitude of the voltage identification value crossing the preset voltage identification threshold.
7. 7. The apparatus of claim 1, wherein the filter is a low pass filter, and Wherein the operational settings modified by the controller include a time constant of the low pass filter, and Wherein the controller is operative to increase the magnitude of the time constant of the low pass filter in response to a change in the current consumption by the dynamic load.
8. 8. The apparatus of claim 1, wherein the filter controller operates to reduce a rate of change of the filtered signal over time.
9. 9. The apparatus of claim 1, wherein the reference voltage generator is operative to generate the target set point voltage based on a voltage identification value provided by the dynamic load, the voltage identification value being generated via implementation of an adaptive voltage positioning function.
10. 10. The apparatus of claim 8, wherein the target set point voltage generated by the reference voltage generator is equal to: VID–(IoutF × LL), Where VID = the voltage identification value, IoutF = size of the filtered signal, and LL = load line function associated with a voltage converter that operates to convert an input voltage to the output voltage.
11. 11. A method of controlling a filter, comprising: Implementing a filter to filter a received signal to produce a filtered signal, the received signal being indicative of a magnitude of current provided by an output voltage to power a dynamic load; Generating a target set point voltage based on the filtered signal, the target set point voltage being used to control the magnitude of the output voltage, and Dynamically changing an operational setting of the filter that filters the received signal; wherein dynamically changing the operational setting for filtering the received signal comprises: Comparing the magnitude of the output voltage with an output voltage threshold via a first comparator, and The magnitude of the voltage identification value received from the dynamic load is compared with a preset voltage identification threshold via a second comparator.
12. 12. The method of claim 11, further comprising: An adaptive voltage positioning function is implemented to generate a target set point voltage.
13. 13. The method of claim 11, wherein dynamically changing an operational setting for filtering the received signal comprises: The operational setting of the filter is controlled based on the magnitude of the output voltage and the magnitude of a voltage identification value received from the dynamic load.
14. 14. The method of claim 11, wherein dynamically changing an operational setting for filtering the received signal comprises: the operational setting of the filter is adjusted based on the magnitude of the output voltage.
15. 15. The method of claim 11, wherein dynamically changing an operational setting for filtering the received signal comprises: The operating setting of the filter is adjusted based on a change in the magnitude of a voltage identification value received from the dynamic load.
16. 16. The method of claim 11, wherein the operational setting of the filter comprises a bandwidth to filter the signal, the method further comprising: in response to detecting that i) the magnitude of the output voltage crosses the output voltage threshold and ii) the magnitude of the voltage identification value crosses the preset voltage identification threshold, reducing a bandwidth of filtering the signal.
17. 17. The method of claim 11, wherein the operational setting comprises a time constant of a low pass filter, the method further comprising: the magnitude of the time constant of the low pass filter is increased in response to a change in the magnitude of the current provided to the dynamic load.
18. 18. The method of claim 11, further comprising: Reducing the rate at which the filtered signal changes over time.
19. 19. The method of claim 11, further comprising: The target set point voltage is generated based on a voltage identification value provided by the dynamic load, the voltage identification value being generated via implementation of an adaptive voltage positioning function.
20. 20. The method of claim 19, further comprising: generating the target set point voltage to be equal to: VID–(IoutF × LL), Where VID = the voltage identification value, IoutF = size of the filtered signal, and LL = load line function associated with a voltage converter that operates to convert an input voltage to the output voltage.

Description

Power supply, filter control and dynamic adaptive voltage positioning Technical Field The present disclosure relates to power supplies and filters, and more particularly to power supplies, filter control, and dynamic adaptive voltage positioning. Background One type of conventional power converter is a buck converter. Typically, to maintain the output voltage within a desired range, a controller in the buck converter compares the magnitude of the generated output voltage to a set point reference voltage. Based on the respective error voltages, the controller modifies the respective switching frequencies and/or pulse width modulations associated with activating the high-side or low-side switching circuits in the buck converter. In some cases, the controller controls operation of the buck converter and generation of the output voltage based on an amount of output current provided to the load by the generated output voltage. For example, conventional techniques include receiving a so-called VID (voltage identification) from a load such as a processor powered by an output voltage. The VID indicates a voltage setting associated with the regulation of the output voltage. The controller of the buck converter adjusts the target set point voltage (Vtarget) based on the VID voltage setting, the load line function of the power supply, and the output current Iout provided to the dynamic load (processor) such that: Vtarget=vid-iout×load line (loadline) (equation 1) The controller of the power supply adjusts the magnitude of the output voltage provided to the load based on the target set point voltage Vtarget. By Active Voltage Positioning (AVP), it is meant that the power supply output voltage is set at a set point reference voltage that depends on the magnitude of the load current. For example, at a minimum load, the output voltage setting is set higher than the nominal voltage level. At full load, when the load consumes maximum current, the output voltage is set below the nominal voltage level. The dc load regulation is effectively reduced but the load transient voltage deviation will be significantly improved. Disclosure of Invention Implementing clean energy (or green technology) is very important to reduce human impact on the environment. Generally, clean energy includes any of a number of methods and materials that are continually developed to reduce the overall toxicity of energy consumption to the environment. The present disclosure includes the observation that raw energy, such as received from green or non-green energy sources, typically needs to be converted into an appropriate form (such as a desired AC voltage, DC voltage, etc.) before being used to power terminal devices, such as servers, computers, mobile communication devices, wireless base stations, etc. In some cases, energy is stored in a respective one or more battery resources. Optionally, energy is received from a voltage generator or voltage source. Whether the energy source is from a green energy source or a non-green energy source, it is desirable to most effectively utilize the primary energy source (e.g., storage and subsequent distribution) provided by these energy sources to reduce our environmental impact. This disclosure helps reduce our carbon footprint and provides better energy utilization through more efficient energy conversion. The present disclosure also includes the observation that conventional techniques include setting the AVP bandwidth and applying it to any of the load step events previously discussed. The implementation of low AVP bandwidth facilitates fast Vmode load transients, but can compromise conventional load transients with small duty cycles. Under the condition, more output capacitors are needed to be added in the power supply so as to meet the requirements of fast Vmode load transient and conventional load transient under different load frequencies (300 Hz-1 MHz) and load duty ratios (10% -90%). Adding more output capacitors to the power supply is undesirable because it increases the size of the power supply and increases the overall cost of manufacturing the power supply. Embodiments herein include novel methods to provide improved performance of power conversion by implementing filter control and adaptive voltage positioning. More specifically, embodiments herein include an apparatus comprising a filter (e.g., a controllable filter), a reference voltage generator, and a filter controller. During operation, the filter receives a signal indicative of the magnitude of current provided by the output voltage to power the dynamic load. The filter generates a filtered signal from the received signal. The reference voltage generator generates a target set point voltage based on the filtered signal. The target set point voltage is used as a basis for controlling (regulating) the magnitude of the output voltage that powers the dynamic load. As discussed herein, the filter controller dynamically adjusts the operational setti