A power supply voltage self-adaptive regulation circuit

Abstract

The invention provides a power supply voltage self-adaptive adjustment circuit, including a voltage adjustment unit, the voltage adjustment unit is connected with a voltage input unit, a current sampling unit and a feedback adjustment unit, the current sampling unit is connected with an amplification unit, and the feedback adjustment unit is connected with a power output unit , the feedback adjustment unit is also connected with the current sampling unit and the amplification unit. The present invention can realize the current detection through the DC impedance of the inductor or the sampling resistor with a small resistance value, and the loss is low; the current detection signal is amplified by the amplifier to control the working state of the triode, and the voltage feedback signal is directly controlled, so that the current can be quickly tracked Real-time changes, fast response. The invention has the advantages of simple design, low cost and small loss, and can automatically and quickly adjust the output voltage with the change of the load current.

Description

technical field [0001] The invention belongs to the field of voltage adjustment, and in particular relates to a power supply voltage self-adaptive adjustment circuit. Background technique [0002] Adaptive Voltage Scaling (AVS) is a commonly used power management technology for computer system power supply. It can adjust the power supply voltage in real time according to the load condition. Generally, the power supply voltage decreases with the increase of the load current, which can not only reduce the power consumption of the system , can also improve the dynamic response performance of the power supply. At present, all major system chips support AVS functions, such as Intel's processor chip, Microsemi's PCIE Switch chip, etc. [0003] At present, there are two main ways to implement AVS in the industry: the first one is to use a dedicated power control chip, such as intersil's nuclear power supply chip, with built-in AVS function, by configuring the bias R DROOP Resisto...

AI Technical Summary

Problems solved by technology

[0003] At present, there are two main ways to realize AVS in the industry: the first one is to use a dedicated power control chip, such as intersil's nuclear power supply chip, with built-in AVS function, by configuring the bias R DROOP Resistors can obtain a dropped load line (Load Line), which is more complex and costly in design; the second method is a passive method, that is, a fixed resistance resistor is connected in series at the output end of the power supply, so that through the fixed resistance resistor The output voltage after the voltage drop presents a fixed negative slope curve to the load current to realize the decreasing characteristic of the output voltage. This method is simple in design and high in reliability, but because the voltage drop is consumed on a fixed resistance, it cannot reduce system power consumption

At present, there is a lack of a power supply voltage adaptive adjustment method with simple design, low cost and low power consumption

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