CN113655838B - Voltage-adjustable redundancy control circuit - Google Patents
Voltage-adjustable redundancy control circuit Download PDFInfo
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- CN113655838B CN113655838B CN202110943720.1A CN202110943720A CN113655838B CN 113655838 B CN113655838 B CN 113655838B CN 202110943720 A CN202110943720 A CN 202110943720A CN 113655838 B CN113655838 B CN 113655838B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
Abstract
The invention relates to a voltage-adjustable redundancy control circuit, and belongs to the technical field of power supplies. The redundancy control circuit comprises a detection circuit, a booster circuit and a redundancy MOS tube, wherein the input end of the detection circuit is connected with the S pole and the D pole of the redundancy MOS tube, namely the V1 end and the V2 end, the output end of the detection circuit is connected with the enabling end of the booster circuit, and the output end of the booster circuit is connected with the G pole of the redundancy MOS tube; when power is supplied by input, the detection circuit can detect the voltage at two ends of the redundant MOS tube, when the voltage at the V1 point is higher than the voltage at the V2 point, the detection circuit outputs low level, the booster circuit does not work, and the redundant MOS tube does not work when no driving signal exists; on the contrary, when the V2 point is higher than the V1 point, the detection circuit outputs a high level, the booster circuit outputs an adjustable voltage, and the redundant MOS tube starts to work. The invention realizes the adjustability of the driving voltage, ensures that any output voltage can carry out redundancy work, does not cause back-flow between power supplies and can also support large-current output redundancy.
Description
Technical Field
The invention belongs to the technical field of power supplies, and particularly relates to a voltage-adjustable redundancy control circuit.
Background
In a computer, two power supply slot positions are usually designed in a case, each slot position is provided with one power supply board card, the two power supply board cards carry out redundancy work, the normal work of a system cannot be influenced by plugging and unplugging any power supply board card, and the phenomenon of reverse current flowing between two power supplies cannot occur. According to the conventional common design, a diode is added at the output end of a power supply to carry out redundancy work, although the circuit is simple and easy to implement, the method has certain limitation, the diode mode is suitable for the power supply with small output current, if the output current is large, large voltage drop can be generated on a diode body, the precision of the output voltage is influenced, the loss is increased, the efficiency is reduced, and when the heat dissipation treatment is not good, the thermal damage of the diode can be caused.
Therefore, it is necessary to design a circuit for controlling the fet to implement the function of output redundancy. At present, a plurality of commonly used control chips, such as the TPS2412 of TI, can be judged by detecting the voltage at the two ends of the MOS transistor, thereby controlling the on/off of the MOS transistor. However, the chip has certain limitation, the working voltage range only supports 3 to 16.5V, and the chip is not suitable for outputting 24V, 48V and other voltages, and is obviously not suitable for national production circuit design. Therefore, a domestic discrete device is necessary to be adopted to design a redundancy control circuit with adjustable working voltage.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem of how to provide a voltage-adjustable redundancy control circuit so as to solve the problem of controlling the on-off of MOS (metal oxide semiconductor) tubes in a nationwide production circuit.
(II) technical scheme
In order to solve the technical problem, the invention provides a voltage-adjustable redundancy control circuit, which comprises a detection circuit, a booster circuit and a redundancy MOS (metal oxide semiconductor) tube, wherein the input end of the detection circuit is connected with the S pole and the D pole of the redundancy MOS tube, namely the V1 end and the V2 end, the output end of the detection circuit is connected with the enabling end of the booster circuit, and the output end of the booster circuit is connected with the G pole of the redundancy MOS tube; when power is supplied by input, the detection circuit can detect the voltage at two ends of the redundant MOS tube, when the voltage at the V1 point is higher than the voltage at the V2 point, the detection circuit outputs low level, the booster circuit does not work, and the redundant MOS tube does not work when no driving signal exists; on the contrary, when the V2 point is higher than the V1 point, the detection circuit outputs a high level, the booster circuit outputs an adjustable voltage, and the redundant MOS tube starts to work.
Further, the voltage detection circuit comprises a comparator U1, a resistor R2 and a resistor R3, wherein in the voltage detection circuit, 5 pins of a U1 device are power supply ends and are connected with a power supply voltage V1 end, meanwhile, the 5 pins are grounded through a filter capacitor C1, 2 pins are grounded, 1 pin is an output end, 3 pins of the U1 are connected with an S pole of a redundant MOS tube U3 through the resistor R1, and 4 pins are connected with a D pole of the redundant MOS tube U3 through the resistor R3.
Further, the S pole of the U3 is connected with the end of the power supply voltage V1.
Further, when the voltage V2 is higher than the voltage V1, the pin 1 of the comparator U1 outputs a low level. When the voltage of V2 is lower than the voltage of V1, pin 1 of the comparator U1 outputs high level.
Further, the boost circuit comprises a boost controller U2, an energy storage inductor L1, a freewheeling diode D1, a sampling resistor R4 and a sampling resistor R6, wherein a pin 2 of the boost controller U2 is an EN enabling end, when the boost controller U is in a high-resistance state or in a suspension state, the boost controller works, the low level does not work, and the pin 2 is connected with a pin 1 of the U1 through the resistor R2; the pin 3 is grounded; 1 foot meets supply end V1, also be boost circuit's input simultaneously, L1 is the energy storage inductance, receive between U2's 1 foot and 4 feet, D1 is freewheeling diode, the 4 feet of U1 are received to the positive pole, boost circuit's output is received to the negative pole, vg end promptly, this Vg end is through sampling resistor R4 and R6 ground connection, U2's 5 feet are connected between sampling resistor R4 and R6, through adjusting the resistance size, the voltage of Vg end is adjusted.
Furthermore, the boost circuit further comprises a resistor R5 and a capacitor C2, and the pin 3 of the boost controller U2 is grounded through the resistor R5 and the capacitor C2, so that the loop compensation function is achieved.
Further, the output terminal of the voltage boost circuit, i.e., the Vg terminal, is connected to the G pole of U3.
Further, U1 is SGM8210-1AXN5G/TR.
Further, U2 is SGM6607AYTN6G/TR.
Further, voltage regulation is carried out through voltage division of two resistors R4 and R6, vg > (V1 + 10V) is guaranteed, and the redundant MOS tube starts to work.
(III) advantageous effects
The invention provides a voltage-adjustable redundancy control circuit, which aims at the problem that a computer power supply can realize adjustable driving voltage in equipment with redundancy requirements in different units, ensures that any output voltage can carry out redundancy work, does not cause back-filling between power supplies, can support large-current output redundancy, can realize the redundancy work of the power supply voltage output in a wide range, and can reduce the loss of the power supply. The reliable operation of the computer equipment is ensured, and the adaptability of the computer power supply and the flexibility of the configuration of the computer equipment are improved.
Drawings
FIG. 1 is a working block diagram of the present invention;
FIG. 2 is a schematic diagram of the redundancy control of the present invention.
Detailed Description
In order to make the objects, contents and advantages of the present invention more apparent, the following detailed description of the present invention will be made in conjunction with the accompanying drawings and examples.
The invention aims to realize the enabling control of the booster circuit by adopting domestic discrete devices and detecting the voltage at two ends of the redundant MOS tube through the detection circuit, thereby outputting adjustable driving voltage and controlling the on-off of the redundant MOS tube.
Fig. 1 shows a working block diagram of the whole device, which mainly includes a detection circuit, a boost circuit and a redundant MOS transistor, wherein an input terminal of the detection circuit is connected to an S pole, i.e., a V1 terminal and a D pole, i.e., a V1 terminal and a V2 terminal, of the redundant MOS transistor, an output terminal of the detection circuit is connected to an enable terminal of the boost circuit, and an output terminal of the boost circuit is connected to a G pole of the redundant MOS transistor. When the input supplies power, detection circuitry can detect redundant MOS pipe both ends voltage, and when V1 point voltage was higher than V2 point voltage, detection circuitry output low level, and boost circuit is out of work, and redundant MOS pipe does not have drive signal and does not carry out work, and the electric current is not outwards exported, does not have in addition to flow backward the electric current and gets into self integrated circuit board. On the contrary, when the V2 point is higher than the V1 point, the detection circuit outputs a high level, the booster circuit outputs an adjustable voltage, the drive is turned on, the redundant MOS tube starts to work, the current is output outwards, and meanwhile, the current cannot flow back to other power panels.
In order to achieve the above object, the present invention provides a redundancy control circuit with adjustable driving voltage, as shown in fig. 2, which is a redundancy control schematic diagram, and mainly includes: voltage detection circuit, voltage regulation circuit. The voltage regulating circuit is a booster circuit.
The voltage detection circuit comprises a comparator U1, a resistor R2 and a resistor R3, wherein in the voltage detection circuit, a U1 device is a comparator, a pin 5 of the comparator is a power supply end and is connected with an S pole V1 end of a power supply voltage/U3, meanwhile, the voltage detection circuit is grounded through a filter capacitor C1, a pin 2 is grounded, and a pin 1 is an output end. The U3 device is a redundant MOS tube, and a pin 3 of the U1 is connected with the S pole of the U3, namely the V1 end, through a resistor R1. The 4 pins are connected with the D pole of U3, namely the V2 end through a resistor R3. When the voltage of V2 is higher than the voltage of V1, pin 1 of the comparator U1 outputs low level. When the voltage of V2 is lower than the voltage of V1, pin 1 of the comparator U1 outputs high level.
The BOOST circuit comprises a BOOST controller U2, an energy storage inductor L1, a freewheeling diode D1, a sampling resistor R4, a resistor R5, a sampling resistor R6 and a capacitor C2, wherein U2 is a BOOST controller. The 2 feet are EN enabling ends, when the high resistance state or the suspension state exists, the boost controller works, the low level does not work, and the 2 feet are connected with the 1 foot of the U1 through the resistor R2. The 3 pins are grounded through a resistor R5 and a capacitor C2, and the function of loop compensation is achieved. Pin 1 is connected to the power supply terminal V1 and is also the input terminal of the voltage boost circuit. L1 is an energy storage inductor and is connected between pin 1 and pin 4 of U2. D1 is a freewheeling diode, the anode is connected to the 4 pin of U1, the cathode is connected to the output end of the booster circuit, namely a Vg end, and the Vg end is connected with the G pole of U3. This Vg end is through sampling resistor R4 and R6 ground connection, and U2's 5 feet are connected between sampling resistor R4 and R6, through adjusting the resistance size, can directly adjust the voltage of Vg end.
Wherein U1 may be SGM8210-1AXN5G/TR.
U2 may be SGM6607AYTN6G/TR.
When the V2 voltage is higher than the V1 voltage, the 1 pin outputs a low level, the EN end is pulled down at the same time, the boost controller does not work, the Vg end does not output voltage, and the U3 does not work. When the voltage of V2 is lower than the voltage of V1, the pin 1 outputs a high-resistance state, meanwhile EN is in a high-resistance state, the boost controller starts to work, voltage regulation is carried out through voltage division of two resistors R4 and R6, vg (V1 + 10V) is guaranteed, and the redundant MOS tube starts to work.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The voltage-adjustable redundancy control circuit is characterized by comprising a detection circuit, a booster circuit and a redundancy MOS tube U3, wherein the input end of the detection circuit is connected with the S pole and the D pole of the redundancy MOS tube U3, namely a power supply voltage V1 end and a power supply voltage V2 end, the output end of the detection circuit is connected with the enabling end of the booster circuit, and the output end of the booster circuit is connected with the G pole of the redundancy MOS tube U3; when power is input and supplied, the detection circuit can detect the voltage at two ends of the redundant MOS tube U3, when the voltage at the V1 point is higher than the voltage at the V2 point, the detection circuit outputs low level, the booster circuit does not work, and the redundant MOS tube U3 does not work when no driving signal exists; on the contrary, when the V2 point is higher than the V1 point, the detection circuit outputs a high level, the booster circuit outputs an adjustable voltage, and the redundant MOS tube U3 starts to work;
the detection circuit comprises a comparator U1, a resistor R2 and a resistor R3, wherein in the detection circuit, a pin 5 of a U1 device is a power supply end and is connected with a power supply voltage V1 end, meanwhile, the pin 2 is grounded through a filter capacitor C1, a pin 1 is an output end, a pin 3 of the U1 is connected with an S pole of a redundant MOS tube U3 through the resistor R1, and a pin 4 is connected with a D pole of the redundant MOS tube U3 through the resistor R3;
the S pole of the U3 is connected with the end of a power supply voltage V1;
the boost circuit comprises a boost controller U2, an energy storage inductor L1, a freewheeling diode D1, a sampling resistor R4 and a sampling resistor R6, wherein a pin 2 of the boost controller U2 is an EN enabling end, when the boost controller U2 is in a high-resistance state or in suspension, the boost controller U2 works, a low level does not work, and the pin 2 is connected with a pin 1 of the U1 through the resistor R2; the pin 3 is grounded; pin 1 is connected with a power supply end V1 and is also an input end of the booster circuit, L1 is an energy storage inductor and is connected between pin 1 and pin 4 of U2, D1 is a freewheeling diode, the anode is connected with pin 4 of U1, the cathode is connected with the output end of the booster circuit, namely, a Vg end, the Vg end is grounded through sampling resistors R4 and R6, pin 5 of U2 is connected between the sampling resistors R4 and R6, and the voltage of the Vg end is adjusted by adjusting the resistance value; the output end of the booster circuit, namely the Vg end, is connected with the G pole of the U3.
2. The voltage tunable redundancy control circuit of claim 1, wherein when the V2 voltage is higher than the V1 voltage, pin 1 of the comparator U1 outputs a low level; when the voltage of V2 is lower than the voltage of V1, pin 1 of the comparator U1 outputs high level.
3. The voltage adjustable redundancy control circuit of claim 1, wherein the boost circuit further comprises a resistor R5 and a capacitor C2, and pin 3 of the boost controller U2 is grounded through the resistor R5 and the capacitor C2 to perform a loop compensation function.
4. The voltage tunable redundancy control circuit of claim 1, wherein U1 is SGM8210-1AXN5G/TR.
5. The voltage tunable redundancy control circuit of claim 1, wherein U2 is SGM6607AYTN6G/TR.
6. The voltage-tunable redundancy control circuit of claim 1, wherein the voltage is tuned by dividing the voltage by two resistors R4 and R6, so that Vg > (V1 + 10V) is ensured and the redundancy MOS transistor U3 starts to operate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110943720.1A CN113655838B (en) | 2021-08-17 | 2021-08-17 | Voltage-adjustable redundancy control circuit |
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| CN202110943720.1A CN113655838B (en) | 2021-08-17 | 2021-08-17 | Voltage-adjustable redundancy control circuit |
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| CN113655838B true CN113655838B (en) | 2022-10-28 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6253330B1 (en) * | 1999-02-17 | 2001-06-26 | Lucent Technologies Inc. | Redundant regulated power supply system with monitoring of the backup power supply |
| US6407899B1 (en) * | 2000-03-07 | 2002-06-18 | International Business Machines Corporation | Fault detection in a redundant power converter |
| KR101110794B1 (en) * | 2009-05-13 | 2012-02-24 | 주식회사 하이닉스반도체 | Fuse circuit and redundancy circuit |
| CN101958576B (en) * | 2010-05-20 | 2013-03-13 | 福建星网锐捷网络有限公司 | Power supply redundancy parallel circuit and working method thereof |
| CN104199531A (en) * | 2014-08-22 | 2014-12-10 | 山东超越数控电子有限公司 | Method for decoupling short-circuit current of CPCI redundant power source |
| CN105703615A (en) * | 2016-04-13 | 2016-06-22 | 浪潮集团有限公司 | Anti-flow-backward design method for DC power supply redundant circuit |
| CN106300642B (en) * | 2016-08-31 | 2019-01-29 | 合肥赛为智能有限公司 | A kind of dual power supply redundancy cold standby circuit with power supply status output |
| CN106410959B (en) * | 2016-11-28 | 2019-01-01 | 上汽大众汽车有限公司 | Vehicle-mounted start and stop voltage regulator circuit |
| US10374421B2 (en) * | 2017-03-24 | 2019-08-06 | Abb Schweiz Ag | Systems and methods for line voltage drop compensation |
| CN112440803B (en) * | 2020-11-10 | 2022-04-26 | 青岛鼎信通讯股份有限公司 | Redundancy monitoring method for series modules of medium-high voltage electric vehicle charging station |
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