DE202017104725U1 - ATX power supply with dual output, which is able to detect and compensate for the voltage drop - Google Patents

Abstract

A dual output ATX power supply capable of detecting and compensating for the voltage drop, having a voltage compensation unit and connected to a first mainboard and a second mainboard, comprising: a unit for detecting the voltage drop A line voltage drop comprising a pin array of the first detection end, a pin array of the second detection end and a first output terminal, wherein the pin array of the first detection end detects the voltage loss in the line between the power supply and the first mainboard, the pin array of the second detection end detecting the voltage loss in the line Detected line between the power supply and the second mainboard, wherein the first output terminal outputs a line loss signal; a switch voltage drop detection unit including a third detection end pin group, a fourth detection end pin group, and a second output terminal, the third end detection pin group detecting the switch voltage loss between the power supply and the first mainboard, the fourth pin end pin group containing the switch voltage loss detected between the power supply and the second mainboard, the second output terminal outputting a switch loss signal; a summing unit having a first end, a second end and a third end, the first end of the summing unit being coupled to the first output terminal of the line voltage drop detecting unit, the second end of the summing unit being connected to the second output terminal of the detecting unit the switch voltage drop is coupled, the summing unit summing the line loss signal and the switch loss signal to produce a total voltage drop loss signal, the total voltage drop loss signal being output via the third end; and a gain and hysteresis comparator unit having a first end and a second end, the first end of the comparator unit being coupled to the third end of the summing unit for amplification and hysteresis, the second end of the comparator unit for amplification and hysteresis with the voltage compensation unit is connected to cause them to perform a voltage compensation.

Description

Field of the invention

The present invention relates to a dual output ATX power supply, and more particularly to a dual output ATX power supply capable of detecting and compensating for the voltage drop.

State of the art

The PC Power Supply Unit (PC Power Supply Unit, often abbreviated as PSU) is used to convert normal AC power into stable, low-voltage DC power for the other components in the computer. Current conventional PC power supplies are all switching power supplies. The input voltage is automatically adjusted to the mains voltage parameters of the main position. For some low-end products, the user must set the voltage switch himself. The input voltage of the currently widely used PC power supplies in ATX format is usually in the range of 100 VAC to 250 VAC, their frequency is 50 Hz or 60 Hz and they give a total of three stable DC voltages, namely 12 V, 5 V and 3 , 3 V, off.

Please refer 1 , which shows a schematic representation of the use of a conventional single output ATX power supply. This will be a motherboard and other components, such. As graphics card, hard disk, processor and CD-ROM drive, powered by a power supply, the output voltage of the power supply a total of four groups, namely 5 VSB, 3.3 V, 5 V and 12 V, has.

If a home computer has two motherboards, each independent power supply motherboard must be connected to a power supply so that the user needs two power supplies. This leads to high costs and a high space requirement.

How the above problem can be solved is of great importance for the related industry and represents an important research direction.

Object of the invention

To improve the above problem, the present invention provides a dual output ATX power supply that can automatically detect and compensate for voltage losses.

To achieve the above object, the present invention provides a dual-output ATX power supply capable of detecting and compensating the voltage drop having a voltage compensation unit and connected to a first mainboard and a second mainboard. wherein it comprises: a line voltage drop detecting unit having a first pin end pin group, a second pin end pin group, and a first output pin, the first pin end pin group detecting voltage loss in the line between the power supply and the first main board; wherein the pin array of the second detection end detects the voltage loss in the line between the power supply and the second mainboard, the first output terminal outputting a line loss signal; a switch voltage drop detection unit including a third detection end pin group, a fourth detection end pin group, and a second output terminal, the third end detection pin group detecting the switch voltage loss between the power supply and the first mainboard, the fourth pin end pin group containing the switch voltage loss detected between the power supply and the second mainboard, the second output terminal outputting a switch loss signal; a summing unit having a first end, a second end and a third end, the first end of the summing unit being coupled to the first output terminal of the line voltage drop detecting unit, the second end of the summing unit being connected to the second output terminal of the detecting unit the switch voltage drop is coupled, the summing unit summing the line loss signal and the switch loss signal to produce a total voltage drop loss signal, the total voltage drop loss signal being output via the third end; and a gain and hysteresis comparator unit having a first end and a second end, the first end of the comparator unit being coupled to the third end of the summing unit for amplification and hysteresis, the second end of the comparator unit for amplification and hysteresis with the voltage compensation unit is connected to cause them to perform a voltage compensation.

By the structure of the present invention, the line voltage drop detecting unit detects the voltage loss in the line of the first motherboard and the second mainboard, then the higher voltage loss is output in the form of a line loss signal, the switch voltage drop detecting unit the switch voltage loss of the first main board and the second board Motherboards detected, then the higher voltage loss in the form of a switch loss signal the summing unit sums the line loss signal and the switch loss signal to produce a total voltage drop loss signal, then outputs the total voltage drop loss signal to the comparator unit for amplification and hysteresis, whereby the gain and hysteresis comparator unit causes the voltage compensation unit to perform voltage compensation.

The above object and the structural and functional characteristics of the invention will become apparent from the following description of the preferred embodiments and from the drawing; this shows in:

1 a schematic representation of the use of a conventional ATX power supply with single output;

2A a schematic representation of the use of the ATX power supply with dual output according to the invention;

2 B a schematic block diagram of a first embodiment according to the present invention;

2C a schematic circuit diagram of the first embodiment according to the present invention;

2D a schematic circuit diagram of the voltage compensation unit of the first embodiment according to the present invention;

3A a schematic block diagram of a second embodiment according to the present invention;

3B a schematic circuit diagram of the voltage compensation unit of the second embodiment according to the present invention.

Detailed description of the embodiments

The above object and the structural and functional characteristics of the invention will become apparent from the following description of the preferred embodiments and from the drawing.

See the 2A . 2 B . 2C and 2D , in which 2A a schematic representation of the use of the ATX power supply with dual output according to the invention, 2 B a schematic block diagram of the first embodiment according to the present invention, 2C a schematic circuit diagram of the first embodiment according to the present invention and 2D shows a schematic circuit diagram of the voltage compensation unit of the first embodiment according to the present invention. The ATX power supply with dual output according to the invention comprises a unit for detecting the line voltage drop 1 , a unit for detecting the switch voltage drop 2 , a summation unit 3 , a comparator unit for amplification and hysteresis 4 and a voltage compensation unit 5 wherein the first output terminal of the line voltage drop detection unit 1 with the first end 31 the summation unit 3 is coupled, wherein the second output terminal of the unit for detecting the switch voltage drop 2 with the second end 32 the summation unit 3 coupled, the third end 33 the summation unit 3 with the first end of the comparator unit for amplification and hysteresis 4 coupled to the second end of the comparator unit for amplification and hysteresis 4 with the voltage compensation unit 5 All of the above units are located in the ATX power supply with dual output, with the ATX power supply with dual output connected to a first motherboard and a second motherboard.

For clarification, it is first defined that the measuring point Vol is the original output, SW1 is the first switch, SW2 is the second switch, W1 is the first line, W2 is the second line, the voltage loss between the measuring point Vol and the measuring point VolA Switch voltage loss between the power supply and the first mainboard (hereinafter referred to as the first switch voltage loss), the voltage loss between the measuring point Vol and the measuring point VolB, the switch voltage loss between the power supply and the second mainboard (hereinafter referred to as the second switch voltage loss) is Voltage loss between the measuring point VolA and the measuring point VolA + the voltage loss in the line between the power supply and the first mainboard (hereinafter referred to as the first voltage loss in the line) and the voltage loss between the measuring point VolB and the measuring point VolB + the voltage loss in the line between the power supply and the second motherboard (hereinafter this is referred to as the second voltage loss in the line) is.

The unit for detecting the line voltage drop 1 includes a first amplifier 11 , a second amplifier 12 , a first comparator 13 and a first selector 14 , where the first end 111 and the second end 112 of the first amplifier 11 form the contact pin group of the first detection end, wherein the first end 111 is connected to the measuring point VolA, wherein the second end 112 connected to the measuring point VolA +, with the first amplifier 11 detects the first loss of voltage in the line and this via a third end 113 outputs; being the first end 121 and the second end 122 of the second amplifier 12 form the contact pin group of the second detection end, wherein the first end 121 connected to the measuring point VolB, the second end 122 connected to the measuring point VolB +, with the second amplifier 12 detects the second voltage loss in the line and this via a third end 123 outputs; being the first end 131 of the first comparator 13 and the first end 141 of the first selector 14 with the third end 113 coupled; the second end 132 of the first comparator 13 and the second end 142 of the first selector 14 with the third end 123 coupled; being the first comparator 13 compare the voltage loss between the first and second voltage losses in the line to determine which voltage loss is greater; the third end 133 of the first comparator 13 with the fourth end 144 of the first selector 14 coupled and outputs a line loss comparison signal; where the first selector 14 determines the amplifier with the greater voltage loss in the line and passes it, then a line loss signal on the third end 143 of the first selector 14 to the summation unit 3 output.

The unit for detecting the switch voltage drop 2 includes a third amplifier 21 , a fourth amplifier 22 , a second comparator 23 and a second selector 24 , where the first end 211 and the second end 212 of the third amplifier 21 form the contact pin group of the third detection end, wherein the first end 211 connected to the measuring point Vol, with the second end 212 connected to the measuring point VolA, the third amplifier 21 detects the first switch voltage loss and this via a third end 213 outputs; being the first end 221 and the second end 222 of the fourth amplifier 22 form the contact pin group of the fourth detection end, wherein the first end 221 connected to the measuring point Vol, with the second end 222 connected to the measuring point VolB, the fourth amplifier 22 detects the second switch voltage loss and this via a third end 223 outputs; being the first end 231 of the second comparator 23 and the first end 241 of the second selector 24 with the third end 213 coupled; the second end 232 of the second comparator 23 and the second end 242 of the second selector 24 with the third end 223 coupled; the second comparator 23 comparing the voltage loss between the first and second switch voltage losses to determine which voltage loss is greater; the third end 233 of the second comparator 23 with the fourth end 244 of the second selector 24 coupled and outputs a switch loss comparison signal; wherein the second selector 24 determines the amplifier with the larger switch voltage loss and passes this, then a switch loss signal on the third end 243 of the second selector 24 to the summation unit 3 output.

The first end 31 the summation unit 3 is with the third end 143 of the first selector 14 coupled to receive the line loss signal, wherein the second end 32 the summation unit 3 for receiving the switch loss signal at the third end 243 of the second selector 24 is coupled, wherein the summation unit 3 sums the line loss signal and the switch loss signal to produce a total voltage drop loss signal, the total voltage drop loss signal across the third end 33 to the comparator unit for amplification and hysteresis 4 is issued.

The comparator unit for amplification and hysteresis 4 includes an operational amplifier 41 and a first hysteresis trigger loop 42 , where the first end 411 of the operational amplifier 41 with the third end 33 the summation unit 3 coupled, the second end 412 of the operational amplifier 41 with the first end 421 the first hysteresis trip loop 42 is coupled, wherein the operational amplifier 41 amplifies the overall voltage drop loss signal to avoid noise interference between the lines, the first hysteresis trip loop 42 by delaying the occurrence of interference prevented, the second end 422 the first hysteresis trip loop 42 with the voltage compensation unit 5 coupled to cause them to perform a voltage compensation.

The voltage compensation unit 5 includes a voltage feedback loop 51 and a constant current source 52 wherein the voltage feedback loop 51 has a reference potential terminal FB, wherein the constant current source 52 a first end, a second end, and a third end, the second end of the constant current source 52 is coupled to the reference potential terminal FB, wherein the first end of the constant current source 52 with the second end 422 the first hysteresis trip loop 42 coupled, wherein the third end of the constant current source 52 is coupled to a ground terminal.

By the above-described structure, the unit for detecting the line voltage drop 1 and the switch voltage drop detection unit 2 when one or both of the first switch SW1 and the second switch SW2 are turned on, respectively a line loss signal and a switch loss signal to the summing unit 3 to generate an overall voltage drop loss signal, the comparator unit for amplification and hysteresis 4 the voltage compensation unit 5 to perform a voltage compensation. Specifically, when the constant current source 52 the signal of the comparator unit for amplification and hysteresis 4 causes it to cause a portion of the current of the voltage feedback loop 51 is removed from the reference potential terminal FB, which is the voltage feedback loop 51 forces the voltage output of Vol to increase to compensate for switch voltage loss and line voltage loss.

See the 3A and 3B , which respectively show a schematic block diagram of the second embodiment according to the present invention and a schematic circuit diagram of the voltage compensation unit of the second embodiment according to the present invention. See also at the same time 2 B , A part of the structure is identical to the structure of the first embodiment and will not be described again here. The difference between the present embodiment and the first embodiment resides in the comparator unit for amplification and hysteresis 4 and in the voltage compensation unit 5 , The comparator unit for amplification and hysteresis 4 further comprises a second hysteresis triggering loop 43 , where the first end 431 the second hysteresis trip loop 43 with the second end 412 of the operational amplifier 41 coupled, the second end 432 the second hysteresis trip loop 43 with the voltage compensation unit 5 coupled to cause them to perform a voltage compensation. The voltage compensation unit 5 includes a voltage feedback loop 51 and a compensation loop 53 wherein the voltage feedback loop 51 a reference potential terminal FB, wherein the compensation loop 53 a first end, a second end and a third end, wherein the second end of the compensation loop is coupled to the reference potential terminal FB.

The compensation loop 53 has a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a first transistor Q1 and a second transistor Q2, wherein the first end of the first resistor R1 is coupled to the reference potential terminal FB, the first one , second and third resistors R1, R2, R3 are commonly coupled to the second ends R12, R22, R32, C12 of the first capacitor C1, the first end C11 of the first capacitor C1 being coupled to a ground terminal, the drain terminal Q13 of the first transistor Q1 is coupled to the first end R21 of the second resistor R2, the gate terminal Q11 of the first transistor Q1 being coupled to the second end 422 the first hysteresis trip loop 42 is coupled, wherein the source terminal Q12 of the first transistor Q1 is coupled to the ground terminal, wherein the drain terminal Q23 of the second transistor Q2 is coupled to the first end R31 of the third resistor R3, wherein the gate terminal Q21 of the second transistor Q2 with the second end 432 the second hysteresis trip loop 43 coupled, wherein the source terminal Q22 of the second transistor Q2 is coupled to the ground terminal, wherein the first transistor Q1 and the second transistor Q2 are n-channel depletion-type transistors, wherein the trigger voltage level of the first hysteresis triggering loop 42 and the trip voltage level of the second hysteresis trip loop 43 are not the same.

In the present embodiment, the first hysteresis trip loop is 42 when the total voltage drop loss signal gradually approaches a high voltage level of the first hysteresis trip loop 42 is high, a high potential, whereby the gate terminal Q11 of the first transistor Q1 passes. At this time, the first capacity C1 fails. With the reference potential terminal FB is achieved that after the in-series switching of the first and second resistors R1, R2, the two further with the resistor R4 of the voltage feedback loop 51 be switched in parallel. Lowering the equivalent resistance value from the reference potential terminal FB to the ground terminal increases the current and forces the voltage feedback loop 51 to increase the voltage output of Vol, thus compensating for the switch voltage loss and line voltage drop.

There is also the second hysteresis trip loop 43 when the total voltage drop loss signal is at a high voltage level of the second hysteresis trip loop 43 is further increased, a high potential, whereby the gate terminal Q21 of the second transistor Q2 passes. At this time, the first capacity C1 fails. With the reference potential terminal FB is achieved that after the parallel connection of the second and third resistors R2, R3, the two further connected in series with the first resistor R1 and then on to the resistor R4 of the voltage feedback loop 51 be switched in parallel. By decreasing the equivalent resistance value from the reference potential terminal FB to the ground terminal more, the current is increased even more and this forces the voltage feedback loop 51 to increase the voltage output of Vol, thus compensating for the switch voltage loss and line voltage drop.

Then there is the second hysteresis trip loop 43 when the total voltage drop loss signal gradually drops to a low voltage level of the second hysteresis trip loop 43 is pulled, a low potential, whereby the gate terminal Q21 of the second transistor Q2 is closed. At this time, the equivalent resistance value from the reference potential terminal FB to the ground terminal is slightly increased, whereby the current of the compensation loop 53 is slightly reduced what the voltage feedback loop 51 forces the voltage output of Vol to be reduced, thus reducing the compensation of the switch voltage loss and the voltage loss in the line.

Finally, there is the first hysteresis trigger loop 42 when the total voltage drop loss signal gradually drops to a low voltage level of the first hysteresis trip loop 42 is pulled, a low potential, whereby the gate terminal Q11 of the first transistor Q1 is closed. At this time, the equivalent resistance value from the reference potential terminal FB to the ground terminal is increased more, whereby the current of the compensation loop 53 is reduced, thus stopping the compensation of the switch voltage loss and the voltage loss in the line.

The above description represents only preferred embodiments of the invention and is not intended to limit the claims. All equivalent changes and modifications that can be made according to the description and the drawings of the invention by a person skilled in the art fall within the scope of the present invention. The scope of the invention is determined by the appended claims.

LIST OF REFERENCE NUMBERS

1

 Unit for detecting the line voltage drop

11

 first amplifier

12

 second amplifier

13

 first comparator

14

 first selector

111, 121, 131, 141

 first end

112, 122, 132, 142

 second end

113, 123, 133, 143

 third end

144

 fourth end

2

 Unit for detecting the switch voltage drop

21

 third amplifier

22

 fourth amplifier

23

 second comparator

24

 second selector

211, 221, 231, 241

 first end

212, 222, 232, 242

 second end

213, 223, 233

 third end

244

 fourth end

3

 summing

31

 first end

32

 second end

33

 third end

4

 Comparator unit for amplification and hysteresis

41

 operational amplifiers

42

 first hysteresis triggering loop

43

 second hysteresis trip loop

411, 421, 431

 first end

412, 422, 432

 second end

5

 Voltage compensation unit

51

 Voltage feedback loop

FB

 Reference potential terminal

52

 Constant current source

53

 compensation loop

R1

 first resistance

R2

 second resistance

R3

 third resistance

C1

 first capacity

R11, R21, R31, C11

 first end

R21, R22, R32, C12

 second end

Q1

 first transistor

Q2

 second transistor

Q11, Q21

 Gate terminal

Q12, Q22

 Source terminal

Q13, Q23

 Drain

SW1

 first switch

SW2

 second switch

Claims (10)

A dual output ATX power supply capable of detecting and compensating for the voltage drop, comprising a voltage compensation unit and connected to a first mainboard and a second mainboard, comprising: a unit for detecting the voltage drop A line voltage drop, which is a contact pin group of the first detection end, a contact pin group of the second detection end and a first Output terminal, wherein the pin of the first detection end detects the voltage loss in the line between the power supply and the first mainboard, wherein the pin group of the second detection end detects the voltage loss in the line between the power supply and the second mainboard, the first output terminal outputs a line loss signal ; a switch voltage drop detection unit including a third detection end pin group, a fourth detection end pin group, and a second output terminal, the third end detection pin group detecting the switch voltage loss between the power supply and the first mainboard, the fourth pin end pin group containing the switch voltage loss detected between the power supply and the second mainboard, the second output terminal outputting a switch loss signal; a summing unit having a first end, a second end and a third end, the first end of the summing unit being coupled to the first output terminal of the line voltage drop detecting unit, the second end of the summing unit being connected to the second output terminal of the detecting unit the switch voltage drop is coupled, the summing unit summing the line loss signal and the switch loss signal to produce a total voltage drop loss signal, the total voltage drop loss signal being output via the third end; and a gain and hysteresis comparator unit having a first end and a second end, the first end of the comparator unit being coupled to the third end of the summing unit for amplification and hysteresis, the second end of the comparator unit for amplification and hysteresis with the voltage compensation unit is connected to cause them to perform a voltage compensation. The dual output ATX power supply capable of detecting and compensating for the voltage drop of claim 1, wherein the line voltage drop detection unit comprises: a first amplifier having a first end, a second end, and a third end, the first end and the second end of the first amplifier forming the pin array of the first detection end; a second amplifier having a first end, a second end and a third end, the first end and the second end of the second amplifier forming the pin array of the second detection end; a first comparator having a first end, a second end and a third end; and a first selector having a first end, a second end, a third end, and a fourth end, wherein the third end of the first amplifier is coupled to the first end of the first comparator and to the first end of the first selector, the third one End of the second amplifier is coupled to the second end of the first comparator and to the second end of the first selector, the third end of the first comparator being coupled to the fourth end of the first selector, the third end of the first selector being connected to the first selector Output terminal is connected. The dual output ATX power supply capable of detecting and compensating for the voltage drop of claim 1, wherein the switch voltage drop detection unit comprises: a third amplifier having a first end, a second end, and a third end, the first end and the second end of the third amplifier forming the pin array of the third detection end; a fourth amplifier having a first end, a second end, and a third end, the first end and the second end of the fourth amplifier forming the contact pin group of the fourth detection end; a second comparator having a first end, a second end and a third end; and a second selector having a first end, a second end, a third end and a fourth end, the third end of the third amplifier being coupled to the first end of the second comparator and to the first end of the second selector, the third one End of the fourth amplifier is coupled to the second end of the second comparator and to the second end of the second selector, wherein the third end of the second comparator is coupled to the fourth end of the second selector, wherein the third end of the second selector to the second output terminal connected is. A dual output ATX power supply capable of detecting and compensating for the voltage drop of claim 1, wherein the gain and hysteresis comparator unit comprises: an operational amplifier having a first end and a second end, the first end of the operational amplifier coupled to the third end of the summing unit; and a first hysteresis triggering loop having a first end and a second end, the first end of the hysteresis triggering loop being coupled to the second end of the operational amplifier. A dual-output ATX power supply capable of detecting and compensating for the voltage drop of claim 4, wherein the A comparator unit for amplification and hysteresis comprises a second hysteresis trigger loop having a first end and a second end, the first end of the second hysteresis trigger loop being coupled to the second end of the operational amplifier. A dual output ATX power supply capable of detecting and compensating for the voltage drop of claim 1, wherein the voltage compensation unit comprises: a voltage feedback loop having a reference potential terminal; and a constant current source having a first end, a second end and a third end, the second end of the constant current source being coupled to the reference potential terminal. A dual output ATX power supply capable of detecting and compensating for the voltage drop of claim 1, wherein the voltage compensation unit comprises: a voltage feedback loop having a reference potential terminal; and a compensation loop having a first end, a second end and a third end, the second end of the compensation loop being coupled to the reference potential terminal. A dual output ATX power supply capable of detecting and compensating for the voltage drop of claim 7, wherein the compensation loop comprises: a first resistor having a first end and a second end, the first end of the first resistor coupled to the reference potential terminal; a second resistor having a first end and a second end; a third resistor having a first end and a second end; a first capacitor having a first end and a second end, the first end of the first capacitor being coupled to a ground terminal, the second end of the first capacitor, the second end of the first resistor, the second end of the second resistor, and the second end second ends of the third resistor are coupled together; a first transistor having a gate terminal, a source terminal and a drain terminal, wherein the gate terminal of the first transistor is coupled to the first mainboard, wherein the source terminal of the first transistor is coupled to the ground terminal, wherein the drain terminal of the first transistor is coupled to the first end of the second resistor; and a second transistor having a gate terminal, a source terminal and a drain terminal, wherein the gate terminal of the second transistor is coupled to the second mainboard, wherein the source terminal of the second transistor is coupled to the ground terminal, wherein the drain terminal of the second transistor is coupled to the first end of the third resistor. The dual output ATX power supply capable of detecting and compensating for the voltage drop of claim 8, wherein the first transistor is an n-channel depletion type transistor. The dual-output ATX power supply capable of detecting and compensating for the voltage drop of claim 8, wherein the second transistor is an n-channel depletion type transistor.

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