CN215120571U - Circuit for rapid discharge of system power supply, server power supply and server - Google Patents
Circuit for rapid discharge of system power supply, server power supply and server Download PDFInfo
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- CN215120571U CN215120571U CN202121242636.9U CN202121242636U CN215120571U CN 215120571 U CN215120571 U CN 215120571U CN 202121242636 U CN202121242636 U CN 202121242636U CN 215120571 U CN215120571 U CN 215120571U
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Abstract
The utility model provides a system power supply circuit that discharges fast, include: the input end of the first switch module is connected with the output end of a standby power supply through a current-limiting resistor on one path, the other path of the input end of the first switch module is connected with the control end of the second switch module, the control end of the first switch module is connected with an enabling signal sending end of a power supply system, and the output end of the first switch module is grounded; the output end of the second switch module is connected with the output end of the power supply system through the discharge resistor, the input end of the second switch module is grounded, the voltage stabilizing module is used for stabilizing the input voltage of the second switch module, the conventional discharge mode is changed, the discharge resistor with the smaller resistance value is used, the discharge time is reduced, the resistor with the larger resistance value is used for limiting the current, the loss of a discharge circuit in the normal working process of the system power supply is reduced, the discharge speed is accelerated, and the discharge time is reduced.
Description
Technical Field
The utility model belongs to the technical field of the power discharge and specifically relates to a circuit, server power and server that system's power discharges fast are related to.
Background
With the development of cloud computing applications, informatization gradually covers various fields of society. People's daily life and daily life are more and more communicated through the network, and the network data volume is also increasing continuously. Along with the improvement of the computing performance of the server, the power consumption of the server is larger and larger, and the electric energy stored on the mainboard is larger and larger. If the power cannot be removed in time or the discharge is too slow, the power-on timing of the system is affected.
As shown in fig. 1, the terminal Voltage on the motherboard is converted by a VRM (Voltage Regulator Module), and the output capacitor can store energy in addition to filtering. In order to meet the instant current demand of the load, an output capacitor is added at the output end of the power supply. The larger the capacity of the output capacitor, the larger the amount of stored power. When the system is turned off, the larger the remaining electric quantity in the output capacitor is, and the electric quantity stored in the capacitor affects the timing when the system is turned on again.
The time required can be very long if the system is self-discharging. In order not to affect the power-up sequence, a discharge line is generally added to the line. Most conventional discharge to a power supply system is connected with a discharge resistor in parallel at a load end, as shown in fig. 2: in order to quickly consume the residual electric quantity in the output capacitor, a discharge resistor is connected in parallel. However, this discharge resistor is always in the working state, and consumes power continuously, and the power consumption of the formula resistor is: p is Vout/R, it can be found that the resistance of the resistor cannot be too small, and if the resistance is too small, the power consumption consumed by the resistor will be increased, which affects the efficiency of the system; but is represented by the formula: q ═ I × t, I ═ Vout/R, then the charge Q ═ Vout × t/R, it follows that when Q and Vout are proportional to R at a certain time t, the larger R, the larger t, and therefore the discharge resistance cannot be too large either; too large a discharge resistance represents a longer discharge time, so that the effect of the discharge line is negligible.
Therefore, the conventional discharging circuit is unreasonable, cannot discharge to the output capacitor quickly, and the resistor is always in a power consumption state, so that the efficiency of the system is affected.
Disclosure of Invention
The utility model discloses a solve the problem that exists among the prior art, the innovation has provided a system power supply circuit that discharges fast, changes the conventional mode of discharging, uses the less resistance that discharges of resistance, reduces the discharge time, uses the resistance of great resistance to be the current limiting action, reduces the loss of discharge circuit at the normal during operation of system power supply for discharge speed reduces the discharge time.
The utility model discloses the first aspect provides a system power supply circuit that discharges fast, include: the input end of the first switch module is connected with the output end of a standby power supply through a current-limiting resistor on one path, the other path of the input end of the first switch module is connected with the control end of the second switch module, the control end of the first switch module is connected with an enabling signal sending end of a power supply system, and the output end of the first switch module is grounded; the output end of the second switch module is connected with the output end of the power supply system through a discharge resistor, and the input end of the second switch module is grounded; one path of the input end of the voltage stabilizing module is connected with the input end of the first switch module, the other path of the input end of the voltage stabilizing module is connected with the power output end of the permanent power supply through a current limiting resistor, and the output end of the voltage stabilizing module is connected with the control end of the second switch module.
Optionally, the voltage stabilizing module comprises a voltage stabilizing tube and a voltage stabilizing capacitor, the anode of the voltage stabilizing tube is grounded, one path of the cathode is connected with the input end of the first switch module, one path of the cathode is connected with the power output end of the standby power supply through a current limiting resistor, and the other path of the cathode is connected with the control end of the second switch module; one end of the voltage stabilizing capacitor is grounded, one path of the other end of the voltage stabilizing capacitor is connected with the input end of the first switch module, one path of the voltage stabilizing capacitor is connected with the power output end of the permanent power supply through the current limiting resistor, and the other path of the voltage stabilizing capacitor is connected with the control end of the second switch module.
Optionally, the first switch module and the second switch module are both MOS transistors.
Furthermore, one path of a drain electrode of the first MOS tube is connected with a power supply output end of the stock power supply through a current-limiting resistor, the other path of the drain electrode of the first MOS tube is connected with a grid electrode of the second MOS tube, a source electrode of the first MOS tube is grounded, and the grid electrode of the first MOS tube is connected with an enabling signal sending end of the power supply system; the drain electrode of the second MOS tube is connected with the power supply output end of the power supply system through a discharge resistor, the source electrode of the second MOS tube is grounded, one path of the grid electrode is connected with the drain electrode of the first MOS tube, and the other path of the grid electrode is connected with the power supply output end of the stock power supply through a current-limiting resistor.
Furthermore, the first MOS tube also comprises a first parasitic diode, the anode of the first parasitic diode is grounded, one path of the cathode is connected with the power output end of the stock power supply through a current-limiting resistor, and the other path of the cathode is connected with the grid electrode of the second MOS tube; the second MOS tube further comprises a second parasitic diode, the anode of the second parasitic diode is grounded, and the cathode of the second parasitic diode is connected with the power supply output end of the power supply system through a discharge resistor.
Furthermore, the first MOS tube and the second MOS tube are both N-type MOS tubes.
The utility model discloses technical scheme second aspect still provides a server power, adopts the utility model discloses the first aspect system power quick discharge's circuit.
The utility model discloses technical scheme third aspect still provides a server, adopts the utility model discloses the second aspect the server power.
The utility model discloses a technical scheme include following technological effect:
the utility model discloses change conventional discharge mode, use the less discharge resistance of resistance, reduce discharge time, use the resistance of great resistance to be the current limiting effect, reduce the loss of discharge circuit at the normal during operation of system power for discharge speed reduces discharge time.
The utility model discloses voltage stabilizing module includes stabilivolt and voltage stabilizing capacitor among the technical scheme, stabilizes the V of second MOS pipe on the one handGSWhen the first MOS tube is turned off, the standby power supply voltage is higher than the regulated output voltage, and the voltage between the grid and the source of the Q2 becomes the output voltage of the regulated tube, so that the voltage is not limited by VGSThe MOS tube is damaged due to too large size; on the other hand, a slow start function is added for opening the second MOS tube, so that the phenomenon that the second MOS tube is damaged due to instantaneous inrush of discharge current is prevented.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
For a clear explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for a person skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art power system circuit;
FIG. 2 is a schematic diagram of a prior art power system discharge circuit;
fig. 3 is a schematic diagram of a circuit according to an embodiment of the present invention.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily limit the invention.
Example one
As shown in fig. 3, the utility model provides a circuit that system power supply discharges fast, include: the circuit comprises a first switch module 1, a second switch module 2, a current limiting resistor R1, a discharge resistor R2 and a voltage stabilizing module 3, wherein one path of an input end of the first switch module 1 passes through the current limiting resistor R1 and a normal power supply (V)SB) Is connected to the other path of the output terminal of the second switch module 2The control end is connected, the control end of the first switch module 1 is connected with an enable signal (EN) sending end of a power supply system, and the output end of the first switch module 1 is grounded; the output terminal of the second switch module 2 is connected to the output terminal (V) of the power supply system through the discharge resistor R2out) The input end of the second switch module 2 is grounded; one path of the input end of the voltage stabilizing module 3 is connected with the input end of the first switch module 1, the other path of the input end of the voltage stabilizing module is connected with the power output end of the permanent power supply through a current limiting resistor R1, and the output end of the voltage stabilizing module 3 is connected with the control end of the second switch module 2.
Specifically, the voltage stabilizing module 3 comprises a voltage stabilizing tube ZD1 and a voltage stabilizing capacitor C1, the anode of the voltage stabilizing tube ZD1 is grounded, one path of the cathode is connected with the input end of the first switch module 1, one path of the cathode is connected with the power output end of the permanent power supply through a current limiting resistor R1, and the other path of the cathode is connected with the control end of the second switch module 2; one end of the voltage-stabilizing capacitor C1 is grounded, one path of the other end is connected with the input end of the first switch module 1, one path of the voltage-stabilizing capacitor C1 is connected with the power output end of the standby power supply through the current-limiting resistor R1, and the other path of the voltage-stabilizing capacitor C1 is connected with the control end of the second switch module 2.
The first switch module 1 and the second switch module 2 are both MOS transistors.
Specifically, one path of a drain electrode of the first MOS tube Q1 is connected with a power output end of a stock power supply through a current-limiting resistor R1, one path of the drain electrode is connected with a cathode of a voltage-stabilizing tube ZD1, one path of the drain electrode is connected with one end of a voltage-stabilizing capacitor C1, the other path of the drain electrode is connected with a grid electrode of the second MOS tube Q2, a source electrode is grounded, and the grid electrode is connected with an enabling signal sending end of a power supply system; the drain electrode of the second MOS tube Q2 is connected with the power supply output end of the power supply system through a discharge resistor R2, the source electrode is grounded, one path of the grid electrode is connected with the drain electrode of the first MOS tube Q1, one path of the grid electrode is connected with the cathode of the voltage-stabilizing tube ZD1, one path of the grid electrode is connected with one end of the voltage-stabilizing capacitor C1, and the other path of the grid electrode is connected with the power supply output end of the stock power supply through a current-limiting resistor R1.
The first MOS transistor Q1 further comprises a first parasitic diode D1, the anode of the first parasitic diode D1 is grounded, one path of the cathode is connected with the power supply output end of the stock power supply through a current-limiting resistor R1, and the other path of the cathode is connected with the grid electrode of the second MOS transistor Q2; the second MOS transistor Q2 further includes a second parasitic diode D2, an anode of the second parasitic diode D2 is grounded, and a cathode thereof is connected to the power output terminal of the power supply system through a discharge resistor R2.
The first MOS transistor Q1 and the second MOS transistor Q2 are both N-type MOS transistors. Specifically, the model of the first MOS transistor Q1 may be 2N7002, the model of the second MOS transistor Q2 may be CPH3462, and the second MOS transistor Q2 is used as a discharge switch, which requires a relatively large current capacity.
When the power system normally works, the enable signal EN is at a high level, and at this time, the first MOS transistor Q1 is in a conducting state and is in a standby power (V)SB) The current-limiting resistor R1 is directly grounded, and the gate voltage of the second MOS transistor Q2 is low, so that the second MOS transistor Q2 is in an off state, the discharge resistor R2 does not function, and the consumption of the power supply system is P ═ VSB/R1 at this time;
the resistance (hundreds of K) of the current limiting resistor R1 is relatively large. Therefore, the power supply system has very small and negligible losses.
When power supply system closes, enable signal EN is low, first MOS pipe Q1 gets into the closed condition, the grid voltage of second MOS pipe Q2 is the steady voltage of stabilivolt ZD1, second MOS pipe Q2 opens, power supply system's output electric capacity (output electric capacity C and discharge resistance R2 parallel connection) is through discharge resistance R2, discharge resistance R2's encapsulation resistance is little (can be less than 1K omega), can be quick discharge for the system, the chooseing for use of discharge resistance R2 resistance can be according to: the voltage of the discharge circuit and the rated power of the resistor are required to be determined, which is obtained from the formula P-V/R, and the power consumed by the discharge resistor R2 cannot exceed the rated power of the discharge resistor R2 itself. For example, when the circuit voltage 12V to be discharged is discharged by using the resistor R1206, the rated power consumption of the resistor R1206 is 1/4W, and R is 576 according to the above formula, that is, the resistance of the discharge resistor R2 is selected to be not lower than 576 ohms. The specific resistance of discharge resistor R2 can be selected according to actual conditions in a flexible way, and the utility model discloses do not do the restriction here.
From the discharge equation: cout Vout ═ I × t, where Cout is the capacitance of the output capacitor, from which it follows that the larger the discharge current I, the smaller t, and the shorter the discharge time t.
A voltage regulator ZD1 and a capacitor C1 are added to the grid end of the second MOS transistor Q2, a slow start function is added for the opening of the second MOS transistor Q2, and the instant inrush of discharge current is prevented from damaging the second MOS transistor Q2.
The utility model discloses change conventional discharge mode, use the less discharge resistance of resistance, reduce discharge time, use the resistance of great resistance to be the current limiting effect, reduce the loss of discharge circuit at the normal during operation of system power for discharge speed reduces discharge time.
The utility model discloses voltage stabilizing module includes stabilivolt and voltage stabilizing capacitor among the technical scheme, stabilizes the V of second MOS pipe on the one handGSWhen the first MOS tube is turned off, the standby power supply voltage is higher than the regulated output voltage, and the voltage between the grid and the source of the Q2 becomes the output voltage of the regulated tube, so that the voltage is not limited by VGSThe MOS tube is damaged due to too large size; on the other hand, a slow start function is added for opening the second MOS tube, so that the phenomenon that the second MOS tube is damaged due to instantaneous inrush of discharge current is prevented.
Example two
The utility model provides a technical scheme still provides a server power, adopts the embodiment of the utility model provides a system power quick discharge's circuit.
EXAMPLE III
The utility model provides a technical scheme still provides a server, adopts the embodiment of the utility model provides a two the server power.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (8)
1. A circuit for fast discharge of a system power supply, comprising: the input end of the first switch module is connected with the output end of a standby power supply through a current-limiting resistor on one path, the other path of the input end of the first switch module is connected with the control end of the second switch module, the control end of the first switch module is connected with an enabling signal sending end of a power supply system, and the output end of the first switch module is grounded; the output end of the second switch module is connected with the output end of the power supply system through a discharge resistor, and the input end of the second switch module is grounded; one path of the input end of the voltage stabilizing module is connected with the input end of the first switch module, the other path of the input end of the voltage stabilizing module is connected with the power output end of the permanent power supply through a current limiting resistor, and the output end of the voltage stabilizing module is connected with the control end of the second switch module.
2. The circuit for fast discharging of the system power supply according to claim 1, wherein the voltage stabilizing module comprises a voltage stabilizing tube and a voltage stabilizing capacitor, the anode of the voltage stabilizing tube is grounded, one path of the cathode is connected with the input end of the first switch module, one path of the cathode is connected with the power supply output end of the stock power supply through a current limiting resistor, and the other path of the cathode is connected with the control end of the second switch module; one end of the voltage stabilizing capacitor is grounded, one path of the other end of the voltage stabilizing capacitor is connected with the input end of the first switch module, one path of the voltage stabilizing capacitor is connected with the power output end of the permanent power supply through the current limiting resistor, and the other path of the voltage stabilizing capacitor is connected with the control end of the second switch module.
3. The circuit for rapid discharge of a system power supply according to claim 1, wherein the first switch module and the second switch module are both MOS transistors.
4. The circuit for fast discharging of a system power supply according to claim 3, wherein one path of a drain electrode of the first MOS transistor is connected with a power supply output end of the stock power supply through a current-limiting resistor, the other path of the drain electrode of the first MOS transistor is connected with a grid electrode of the second MOS transistor, a source electrode of the first MOS transistor is grounded, and the grid electrode of the first MOS transistor is connected with an enabling signal sending end of the power supply system; the drain electrode of the second MOS tube is connected with the power supply output end of the power supply system through a discharge resistor, the source electrode of the second MOS tube is grounded, one path of the grid electrode is connected with the drain electrode of the first MOS tube, and the other path of the grid electrode is connected with the power supply output end of the stock power supply through a current-limiting resistor.
5. The circuit for fast discharging of a system power supply according to claim 4, wherein the first MOS transistor further comprises a first parasitic diode, an anode of the first parasitic diode is grounded, one path of a cathode of the first parasitic diode is connected with a power supply output end of the stock power supply through a current-limiting resistor, and the other path of the cathode of the first parasitic diode is connected with a grid electrode of the second MOS transistor; the second MOS tube further comprises a second parasitic diode, the anode of the second parasitic diode is grounded, and the cathode of the second parasitic diode is connected with the power supply output end of the power supply system through a discharge resistor.
6. The circuit for rapid discharge of a system power supply as claimed in claim 5, wherein the first MOS transistor and the second MOS transistor are both N-type MOS transistors.
7. A server power supply, characterised by the use of a circuit for rapid discharge of a system power supply as claimed in any one of claims 1 to 6.
8. A server having integrated therein the server power supply of claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121242636.9U CN215120571U (en) | 2021-06-04 | 2021-06-04 | Circuit for rapid discharge of system power supply, server power supply and server |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121242636.9U CN215120571U (en) | 2021-06-04 | 2021-06-04 | Circuit for rapid discharge of system power supply, server power supply and server |
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| Publication Number | Publication Date |
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| CN215120571U true CN215120571U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121242636.9U Active CN215120571U (en) | 2021-06-04 | 2021-06-04 | Circuit for rapid discharge of system power supply, server power supply and server |
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- 2021-06-04 CN CN202121242636.9U patent/CN215120571U/en active Active
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