Method of generating reference voltage signals, voltage regulator control circuit and control method thereof
A technology of reference voltage and control circuit, which is applied in the direction of high-efficiency power electronic conversion, electrical components, data processing power supply, etc., to achieve the effect of good accuracy
Active Publication Date: 2017-09-05
CHENGDU MONOLITHIC POWER SYST
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- Application Information
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Problems solved by technology
However, how to obtain a reference voltage with fast response and high precision according to the pulse width modulation voltage identification code is a problem
Method used
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[0023] Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described here are only for illustration, not for limiting the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the present invention. In other instances, well-known circuits, materials or methods have not been described in detail in order to avoid obscuring the present invention.
[0024] Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present invention. In at least one embodiment. Thus, appearances of the phrases "in on...
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The invention discloses a method of generating reference voltage signals, a voltage regulator control circuit and a control method thereof. The method of generating the reference voltage signals comprises steps: a pulse width modulation voltage identification code is received; the duty ratio of the pulse width modulation voltage identification code is recognized and duty ratio signals are provided; according to the duty ratio signals, target signals corresponding to the pulse width modulation voltage identification code are calculated; when the reference voltage signals are judged to be in need of dynamic adjustment, the duty ratio signals are filtered through a first function to obtain the reference voltage signals; and when the reference voltage signals enter a range decided by the target signals, the duty ratio signals are filtered through a second function to obtain reference voltage signals, wherein the bandwidth of the first function is larger than that of the second function. Thus, while the reference voltage signals quickly respond to changes of the pulse width modulation voltage identification code, high precision is realized.
Description
technical field [0001] Embodiments of the present invention relate to an electronic circuit, and more specifically, to a control circuit of a voltage regulator. Background technique [0002] In a computer system, the operating voltage of a processor, such as a central processing unit (CPU) or a graphics processing unit (GPU), needs to change as its operating mode changes, and a voltage regulator is usually used to provide an operating voltage for the CPU or GPU. The voltage regulator adjusts the working voltage provided by it according to the voltage identification code (voltage identification code) sent by the CPU or the GPU. [0003] An existing processor power supply system generates and adjusts a reference voltage according to a voltage identification code, and a voltage regulator converts an input voltage into an output voltage according to the reference voltage. The output voltage of the voltage regulator is the operating voltage of the processor. Generally, the volt...
Claims
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CPCH02M1/0025H02M3/1588G06F1/26Y02B70/10G06F1/28H02M3/04H02M3/157H02M1/44
Inventor 许彬慈姜礼节刘超赵涛
Owner CHENGDU MONOLITHIC POWER SYST