CN206894499U - Power Supplier - Google Patents

Abstract

A power supply comprises a first power conversion module, a second power conversion module, a switch and a control module. The first power conversion module provides at least one working power and generates a good power signal. The second power conversion module has a lower power conversion efficiency than the first power conversion module and normally provides backup power. The control module comprises a switch control unit connected to the switch and a voltage reduction adjustment unit connected to the second power conversion module. The control module has a first state in which the backup power is continuously output without receiving the good power signal, and a second state in which the switch is turned on and the backup power is reduced in voltage to allow the working power transmitted through the switch to replace the backup power output.

Description

Power Supplier

technical field

The utility model relates to a power supply device, in particular to a power supply device which replaces the output of the standing power with the working power during the normal power supply time.

Background technique

In addition to improving the power density of the power supply, the current research and development direction of the power supply is more focused on reducing the power consumption of the power supply. As disclosed in Taiwan Patent No. I400603, this patent discloses a power configuration device for a plurality of power supply modules, and the plurality of power supply modules are respectively coupled to the relative loads through a plurality of power supply lines, The power configuration device includes: a first switch element, with a first connection end and a second connection end respectively coupled to the output end of the power supply module with relatively high conversion efficiency and the output end of the power supply module with relatively low conversion efficiency among the plurality of power supply modules. The output end of the power supply module, and selectively configure the power output by the power supply module with high conversion efficiency to a predetermined number of loads at the same time according to the on or off state; the second switching element is coupled to the relatively low conversion efficiency Between the output terminal of the power module and the second connection terminal of the first switching element, wherein when the first switching element is conducting, the second switching element is not conducting; and the control device is coupled to the The first switch element is used to generate the control signal to control the on or off state of the first switch element.

From the brief description and diagram of the patent, it can be known that the patent uses a diode as a switching element, but there must be a significant voltage difference between the positive and negative poles of the diode before it can be turned on (because the forward bias voltage of the diode is 0.7V), but due to The output voltage of the power supply module with relatively high conversion efficiency used to replace the power supply module with low conversion efficiency is the same, that is to say, the output voltage of the power supply module with relatively high conversion efficiency is 5V instead of the power supply module with relatively low conversion efficiency. 5V _SB , therefore, the technology proposed in this patent cannot guarantee that the power supply module with relatively high conversion efficiency can replace the output of the power supply module with relatively low conversion efficiency.

Utility model content

The main purpose of the utility model is to solve the problems produced by common implementation.

In order to achieve the above purpose, the utility model provides a power supply, which is connected to an external power source to obtain external power. The power supply includes a first power conversion module, a second power conversion module, a switch and a control module. The first power conversion module has at least one first output terminal. After being enabled, the first power conversion module converts the external power and provides at least one working power through the first output terminal, and generates a power good signal. The power conversion efficiency of the second power conversion module is lower than that of the first power conversion module, and has a second output terminal. After the power supply obtains the external power, the second power conversion module normally converts the external power through the second power conversion module. The output provides backup power. The switching switch is connected between the first output terminal and the second output terminal, and the control module includes a switch control unit connected to the switching switch and a step-down adjustment unit connected to the second power conversion module. When the switch control unit does not receive the good power signal, the switch is not turned on so that the backup power is continuously output in the first state, and when the switch control unit receives the good power signal, the switch is turned on At the same time, the step-down adjustment unit is activated and the backup power output by the second power conversion module is stepped down so that the working power input through the switch can replace the second state of the backup power output.

In one embodiment, the second power conversion module includes a feedback control unit, the step-down adjustment unit is connected to the feedback control unit, and the step-down adjustment unit receives the power good signal in the second state to change the feedback control unit The feedback control signal of the second power conversion module lowers the power level of the backup power outputted by the second power conversion module.

In one embodiment, the first power conversion module has a first auxiliary power unit, the second power conversion has a second auxiliary power unit connected to the first auxiliary power unit, and the second auxiliary power unit is connected to the second auxiliary power unit. There will be no output in the state, and the first auxiliary power unit will output power to the power supply load of the second auxiliary power unit in the second state to replace the output of the second auxiliary power unit.

In one embodiment, the first power conversion module includes a plurality of the first output terminals respectively used to output the working power of different power levels, and the switching switch is connected to the power level and the power level of the first output terminals. One of the same power levels as the backup power. Further, the power level of the backup power is 5V or 12V or 3.3V.

Compared with the conventional ones, the disclosed embodiments of the present utility model have the following characteristics:

In the utility model, when the control module enters the second state, the step-down adjustment unit is used to change the working parameters of the second power conversion module, so that the backup power output by the second power conversion module in the second state The power level of the backup power is lower than the power level of the backup power output in the first state, so as to ensure that the working power output by the first power conversion module can be transmitted to the second power through the switch The output end replaces the backup power, so that the second power conversion module has no output at the moment, so as to reduce the overall loss of the power supply.

Description of drawings

FIG. 1 is a schematic diagram of a power supply unit according to an embodiment of the present invention.

Fig. 2 is a partial circuit schematic diagram of an embodiment of the present invention.

Fig. 3 is a schematic circuit diagram of a switch control unit according to an embodiment of the present invention.

Fig. 4 is a schematic view of an embodiment of the present invention in a first state.

Fig. 5 is a schematic diagram of an embodiment of the present invention in a second state.

FIG. 6 is a schematic diagram of a partial circuit including a step-down adjustment unit according to an embodiment of the present invention.

detailed description

The utility model is described in detail and technical content, now with regard to coordinating drawing description as follows:

Please refer to FIG. 1 , the present invention provides a power supply 100 . During implementation, the power supply 100 will be connected to an external power source 200 to obtain an external power. Furthermore, the power supply 100 can be developed based on the ATX (Advanced Technology Extended) standard formulated by Intel Corporation, and the power supply 100 includes a first power conversion module 11, a second power conversion module 12, a switch 13 and a control module 14 . Wherein, the first power conversion module 11 is composed of a plurality of electronic components, and the first power conversion module 11 may be designed based on an existing switching power conversion circuit. Further, the first power conversion module 11 has a first power switching unit 111, connected to the first transformer 112 of the first power switching unit 111, connected to the first modulation unit 113 of the first transformer 112, respectively connected to the first A power switching unit 111, a first feedback control unit 114 of the first modulation unit 113, and a first auxiliary power module 115, wherein the first power switching unit 111 and the first auxiliary power module 115 are arranged on the second A primary side of a transformer 112, and the first modulation unit is disposed on the secondary side. The first transformer 112 is converted to the power input by the first power switching unit according to the designed turns ratio of the winding, and the first modulation unit 113 performs power leveling on the power output by the first transformer 112. After accurate modulation, rectification and filtering, it is output. Moreover, the first feedback control unit 114 converts the working state of the first modulation unit 113 into a feedback control signal and sends it to the first power switching unit 111, so that the first power switching unit 111 can follow the first power switching unit 111. A working state of the modulation unit 113 is moderately adjusted. In addition, the first auxiliary power module 115 is used to provide power to the first power switching unit 111 and the relevant circuits to which the primary side of the first power conversion module 11 belongs, so that those receiving power from the first auxiliary power module 115 can The obtained power is used for the initial startup or to maintain the normal operation of the circuit after startup.

Furthermore, the first power conversion module 11 has at least one first output terminal 116, and the first power conversion module 11 is enabled to receive the start signal ( commonly known as Ps_on signal), the first power conversion module 11 will convert the external power into at least one working power (V _OUT ) after being enabled, and the working power (V _OUT ) will be output to the first output terminal 116 load. Moreover, the first power conversion module 11 will generate a power good signal (P_G) after normal startup, and the power good signal (P_G) can be transmitted to the load by the power supply 100 through the information transmission line, so that the load can The power good signal (P_G) determines the power supply status of the power supply 100 . In one embodiment, the first power conversion module 11 is designed based on the ATX standard, and generates a plurality of the working power after being enabled, and the working power (V _OUT) includes at least 12V, -12V, 5V and 3.3V power level. Moreover, in this embodiment, the first power conversion module 11 includes a plurality of the first output terminals 116 , and each of the first output terminals 116 transmits one of the operating power (V _OUT ) independently.

On the other hand, the second power conversion module 12 can also be designed based on the current switching power conversion circuit, the power conversion efficiency of the second power conversion module 12 is lower than that of the first power conversion module 11, the second power conversion After the power supply 100 obtains the external power, the module 12 normally converts the external power to the backup power (V _SB ), and the backup power (V _SB ) provides the resident circuit of the load and can still operate when the load is not started. working. The second power conversion module 12 has a second power switching unit 121, a second transformer 122 connected to the second power switching unit 121, a second modulation unit 123 connected to the second transformer 122, respectively connected to the second power switching unit 122. The unit 121 and the second feedback control unit 124 of the second modulation unit 123 , the second auxiliary power unit 125 and the second output terminal 126 . Wherein, the working concept of the second power switching unit 121 , the second transformer 122 , the second modulation unit 123 and the second feedback control unit 124 is the same as that of the first power switching unit 111 owned by the first power conversion module 11 , the first transformer 112 , the first modulation unit 113 , and the first feedback control unit 114 are the same, and will not be repeated here. Moreover, the second auxiliary power unit 125 is used to maintain the normal operation of the circuit when the second power switching unit 121 and other electronic components belonging to the second power conversion module 12 are initially started and after the start. , the second auxiliary power unit 125 is further connected to the first auxiliary power unit 115 . Thus, when the second auxiliary power unit 125 outputs the backup power (V _SB ) in the normal state of the second power conversion module 12, the second auxiliary power unit 125 will simultaneously provide power to the first auxiliary power unit 115 , so that the first auxiliary power unit 115 can provide the first power switching unit 111 with the power required for startup. Furthermore, the present invention defines the power supply object of the second auxiliary power unit 125 as the power supply load of the second auxiliary power unit 125 , and the specific components of the power supply load can be referred to above, and will not be repeated here.

In addition, the power level of the backup power (V _SB ) referred to in the present invention is 5V or 12V or 3.3V.

And please refer to FIG. 2 , as above, the switch 13 is connected between the first output terminal 116 and the second output terminal 126, and the switch 13 can be a bipolar transistor (BJT) or a metal oxide semiconductor field effect transistors (MOSFETs). Furthermore, when the first power conversion module 11 has a plurality of the first output terminals 116, the switching switch 13 will set the operating power (V _OUT ) output from the plurality of first output terminals 116 to the power level of the One of the same power levels of the backup power (V _SB ), for example, the power level of the backup power (V _SB ) is 5V, so the switch 13 is set at the plurality of the first output terminals One of 116 is used to output the operating power (V _OUT ) of 5V. Furthermore, the control module 14 includes a switch control unit 15 connected to the switching switch 13 and a step-down regulation unit 16 connected to the second power conversion module 12 . Furthermore, the switch control unit 15 can be composed of a plurality of switch elements 151, 152. The switch control unit 15 has a signal output terminal 153 connected to the switch 13, as shown in FIG. 3 , the signal The change of the output terminal 153 will control the opening and closing of the switch 13 . Further, the switching elements of the switch control unit 15 are continuously turned on and off after receiving the power good signal P_G, and finally the voltage source 154 connected to the switch control unit 15 can change the voltage of the signal output terminal 153 , so that the switch 13 is turned on.

Please also refer to FIG. 4 to FIG. 6 , the control module 14 has the function of making the switching switch 13 not turned on when the switch control unit 15 does not receive the power good signal (P_G), so that the backup power (V _SB ) continues to output The first state of the first state, and the switching control unit 15 receives the power good signal (P_G) to make the switch 13 turn on and at the same time make the step-down regulation unit 16 start and make the second power conversion module 12 output The backup power (V _SB ) is stepped down so that the working power input via the switch 13 can replace the second state of the backup power output (V _SB ). To further illustrate, first assume that when the power supply 100 is only connected to the external power source 200 and is in an inactive state, the first power conversion module 11 is not enabled because the start signal is not obtained, the first power conversion module 11 The power good signal (P_G) is not generated. At this time, the switch control unit 15 makes the switching switch 13 in a non-conductive state because the power good signal (P_G) cannot be obtained, so that the backup power (V _SB ) will remain from the second output Terminal 126 outputs to the load. Furthermore, assuming that the power supply 100 enters the startup state after receiving the startup signal transmitted by the load, the first power conversion module 11 will not provide the working power through the first output terminal 116 after the startup procedure ends. (V _OUT ) to the load, the power good signal (P_G) is also generated, and the control module 14 will enter the control procedure of the second state. At this time, after the switch control unit 15 obtains the power good signal (P_G), the switch 13 is turned on, that is, the first output terminal 116 and the second output terminal 126 of the switch 13 are connected. There is a short circuit between them. At the same time, the step-down regulation unit 16 is also activated due to the power good signal (P_G), and the step-down regulation unit 16 changes the control factor of the second power conversion module 12, so that the second power conversion module 12 The power level of the backup power (V _SB ) output later is lower than the power level of the backup power (V _SB ) output in the first state. For example, when the control module 14 is in the first state, the power level of the backup power (V _SB ) and a feedback control signal generated by the second feedback control unit 124 are both 5V, and in the first state In the second state, the second feedback control unit 124 is interfered by the step-down adjustment unit 16 to generate a different feedback control signal, so that the power level of the backup power (V _SB ) is reduced to 3V. Thereafter, the working power (V _OUT ) will be poured into the second output terminal 126 so that the second power module backup power level is higher than the feedback control signal, forcing the second power switching unit 121 via the second feedback control unit 124 stop working, so that the working power (V _OUT ) replaces the backup power (V _SB ) and outputs to the load. In this way, the second power conversion module 12 will have no output, and after the first power conversion module 11 starts to supply power (that is, when the control module enters the second state), the power supply 100 will lose power due to the second power The conversion module 12 has no output so that the overall efficiency of the power supply 100 can be improved, and unnecessary loss of the power supply 100 can be avoided.

Furthermore, in the previous embodiment, in the second state, when the step-down regulation unit 16 receives the power good signal (P_G) to start, the step-down regulation unit 16 will change the output voltage generated by the second feedback control unit 124 The feedback control signal of the second power conversion module 12 makes the power level of the backup power (V _SB ) output by the second power conversion module 12 decrease thereafter. Furthermore, in the second state, the no output of the second power conversion module 12 causes the second auxiliary power unit 125 to have no output, which compared with the power output of the first power conversion module 11 will make the first auxiliary power Unit 115 replaces the power delivered by the second auxiliary power unit 125 that will output power to the power supply load of the second auxiliary power unit 125 . In this way, besides having no output, the second power conversion module 12 also has no standby consumption generated by the second auxiliary power unit 125 , so that the overall efficiency of the power supply 100 can be improved.

【Description of graphic symbols】

11...........The first power conversion module

111...........The first power switching unit

112...........First Transformer

113...........The first modulation unit

114...........First feedback control unit

115...........The first auxiliary power unit

116...........First output terminal

12...........Second power conversion module

121...........Second power switching unit

122..........Second transformer

123...........Second modulation unit

124..........Second feedback control unit

125...........Second Auxiliary Power Unit

126...........Second output terminal

13...........Toggle switch

14..........Control module

15..........Switch control unit

151, 152.......Switching element

153...........Signal output terminal

154...........Voltage source

16........... Buck adjustment unit

VOUT...........Working power

VSB........... Backup Power

P_G...........Power Good Signal

100...........Power supply

200...........External power source.

Claims (7)

1. a kind of power supply unit, external power source is connected to obtain external power, it is characterised in that the power supply unit bag Contain：

First power switching module, has at least one first output end, and first power switching module changes institute after being enabled State external power and provide an at least power for operation through first output end, and produce electric power good signal；

Second power switching module, power supply conversion efficiency is less than first power switching module, and has the second output end, institute State the second power switching module normality after the power supply unit obtains the external power and change the external power through institute State the second output end and redundancy electric power is provided；

Switching switch, is connected between first output end and second output end；And

Control module, include the control unit for connecting the switching switch and the decompression of connection second power switching module Adjustment unit, the control module, which has, opens the switching when control module does not receive the electric power good signal The first state for being not turned on making the redundancy electric power persistently export is closed, and it is good in the control module receiving electric power Signal and make it is described switching switch switch to conducting and meanwhile make it is described be depressured adjustment unit start and make the second electrical power conversion mould The redundancy electric power of block output, which is depressurized, to be enable to substitute the redundant through the incoming power for operation of the switching switch Second state of electric power output.

2. power supply unit as claimed in claim 1, it is characterised in that second power switching module includes feedback control Unit, the decompression adjustment unit connect the feedback control unit, and the decompression adjustment unit connects in second state The feedback control signal for being changed the feedback control unit by the electric power good signal makes second power switching module Decline in the electric power level of rear the exported redundancy electric power.

3. power supply unit as claimed in claim 1 or 2, it is characterised in that first power switching module has first Auxiliary power unit, second electrical power conversion have the second auxiliary power list being connected with first auxiliary power unit Member, second auxiliary power unit will be without outputs in second state, and first auxiliary power unit is in described The power supply to second auxiliary power unit is loaded into output power to substitute second auxiliary power unit in two-state Output.

4. power supply unit as claimed in claim 3, it is characterised in that first power switching module includes plural number respectively To export first output end of the power for operation of different electric power levels, the switching switch be then connected to it is described extremely One of electric power level and the redundancy electric power same power level in few one first output end.

5. power supply unit as claimed in claim 4, it is characterised in that the electric power level of the redundancy electric power is 5V or 12V Or 3.3V.

6. power supply unit as claimed in claim 1 or 2, it is characterised in that first power switching module includes plural number Respectively to export first output end of the power for operation of different electric power levels, the switching switch is then connected to institute State one of electric power level and the redundancy electric power same power level at least one first output end.

7. power supply unit as claimed in claim 3, it is characterised in that the electric power level of the redundancy electric power is 5V or 12V Or 3.3V.