TWI642249B - Power Supplier - Google Patents

Abstract

A power supply device includes 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 power good signal. The second power conversion module has a lower power conversion efficiency than the first power conversion module, and provides a backup power in a normal state. The group includes a switch control unit connected to the switch and a buck adjustment unit connected to the second power conversion module, the control module having a first one that does not receive the power good signal and continuously outputs the backup power a state, and the receiving of the power good signal causes the switch to be turned on and the backup power to be stepped down so that the working power transmitted through the switch can replace the second state of the backup power output.

Description

Power Supplier

The present invention relates to a power supply, and more particularly to a power supply that replaces the standby power output with normal operating power.

In addition to improving the power density of the power supply, the power supply research and development direction of the current power supply is aimed at reducing the power consumption of the power supply. As disclosed in the Patent No. I400603 of the Republic of China, the patent discloses a power supply configuration device for a plurality of power supply modules, wherein the plurality of power supply modules are respectively coupled to the opposite loads through a plurality of power supply lines. The power supply configuration device includes: a first switching component having a first connection end and a second connection end respectively coupled to the output end of the power supply module having a relatively high conversion efficiency among the plurality of power supply modules; The output end of the power supply module having a relatively low conversion efficiency, and selectively configuring the power output of the power conversion module with high conversion efficiency to a predetermined number of loads according to the conduction or blocking state; a second switching element, And being coupled between the output end of the power module with relatively low conversion efficiency and the second connection end of the first switching element, wherein when the first switching element is turned on, the second switching element is not turned on; The control device is coupled to the first switching component for generating the control signal to control an on or off state of the first switching component.

According to the brief description and the illustration of the patent, the patent uses a diode as the switching element, but the positive and negative poles of the diode need to have a significant voltage difference to be conductive (the reason why the forward bias of the diode is 0.7) V), but because the power supply module with relatively high conversion efficiency is used to replace the low-conversion power supply module, the output voltage is the same, that is, the power supply module with relatively high conversion efficiency replaces the conversion efficiency with 5V. Relatively low power supply module outputs 5VSB, therefore, the patent The proposed technology cannot guarantee that the power supply module with relatively high conversion efficiency replaces the output of the power supply module with relatively low conversion efficiency.

The main object of the present invention is to solve the problems caused by conventional implementation.

To achieve the above object, the present invention provides a power supply that is connected to an external power source to obtain an 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, and the first power conversion module is enabled to convert the external power and provide at least one working power through the first output terminal, and generate 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 end. The second power conversion module normally converts the external power after the power supply obtains the external power. A backup power is provided via the second output. The switch is connected between the first output end and the second output end, the control module includes a switch control unit connected to the switch, and a buck adjustment unit connected to the second power conversion module, the control The module has a first state in which the switch control unit does not receive the power good signal, the switch is not turned on to continuously output the backup power, and the switch control unit accepts the power good signal Turning the switch into conduction, simultaneously causing the step-down adjusting unit to start and causing the backup power output by the second power conversion module to be stepped down, so that the working power transmitted through the switch is replaced by the backup power output. The second state.

In an embodiment, the second power conversion module includes a feedback control unit, and the step-down adjustment unit is connected to the feedback control unit, and the step-down adjustment unit changes the power good signal in the second state. A feedback control signal of the feedback control unit causes the power level of the backup power output by the second power conversion module to decrease.

In an embodiment, the first power conversion module has a first auxiliary power unit, and the second power conversion module has a second auxiliary power unit connected to the first auxiliary power unit, the second auxiliary power The unit will have no output in the second state, and the first auxiliary power unit will output power to a power supply load of the second auxiliary power unit in the second state instead of the output of the second auxiliary power unit.

In an embodiment, the first power conversion module includes a plurality of first output terminals for respectively outputting the working power of different power levels, and the switch is connected to the power levels of the first outputs. 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.

Through the foregoing embodiments of the present invention, the following features are compared with the conventional ones: When the control module enters the second state, the buck adjustment unit changes the operating parameters of the second power conversion module to output 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 outputted in the first state to ensure that the working power output by the first power conversion module can be transmitted to the switch through the switch The second output terminal replaces the backup power, so that the second power conversion module has no output at present, and the overall power consumption of the power supply can be reduced.

11‧‧‧First Power Conversion Module

111‧‧‧First power switching unit

112‧‧‧First transformer

113‧‧‧First Modulation Unit

114‧‧‧First feedback control unit

115‧‧‧First Auxiliary Power Unit

116‧‧‧First output

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

13‧‧‧Toggle switch

14‧‧‧Control Module

15‧‧‧Switch Control Unit

151, 152‧‧‧ switching elements

153‧‧‧ signal output

154‧‧‧voltage source

16‧‧‧Buck adjustment unit

VOUT‧‧‧Working power

VSB‧‧‧Reservation of electricity

P_G‧‧‧Power good signal

100‧‧‧Power supply

200‧‧‧External power source

1 is a schematic diagram of a power supply unit in accordance with an embodiment of the present invention.

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

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

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

Figure 5 is a schematic view showing the implementation of an embodiment of the present invention in a second state.

FIG. 6 is a partial circuit diagram of a buck adjustment unit according to an embodiment of the invention.

The detailed description and technical contents of the present invention are as follows: Referring to FIG. 1, the present invention provides a power supply 100, which is connected to an external power source 200 to obtain a power supply 100. External power. In addition, the power supply 100 can be developed based on the ATX (Advanced Technology Extended) specification developed by Intel Corporation. The power supply 100 includes a first power conversion module 11, a second power conversion module 12, and a switch. 13 and a control module 14. The first power conversion module 11 is composed of a plurality of electronic components, and the first power conversion module 11 can be designed based on a current switching power conversion circuit. Further, the first power conversion module 11 has a first power switching unit 111, a first transformer 112 connected to the first power switching unit 111, and a first modulation unit 113 connected to the first transformer 112. a first feedback control unit 114 and a first auxiliary power module 115 respectively connected to the first power switching unit 111 and the first modulation unit 113, wherein the first power switching unit 111 and the first The auxiliary power module 115 is disposed on the primary side of the first transformer 112, and the first modulation unit is disposed on the secondary side. The first transformer 112 is converted to the incoming power of the first power switching unit according to the turns ratio designed when the winding is performed, and the first modulation unit 113 performs power for the power output by the first transformer 112. The level modulation is rectified and filtered and output. In addition, the first feedback control unit 114 converts the working state on the first modulation unit 113 into a feedback control signal, and sends the signal to the first power switching unit 111, so that the first power switching unit 111 can A modest adjustment is made in accordance with the operating state of the first modulation unit 113. The first auxiliary power module 115 is configured to supply power to the first power conversion unit 111 and the related circuit to which the first power conversion module 11 belongs. The power receiving the first auxiliary power module 115 can use the obtained power for initial operation or to maintain the normal operation of the circuit after starting.

Furthermore, the first power conversion module 11 has at least one first output end 116, and the first power conversion module 11 is enabled to receive the power supply 100 from a load (not shown). When the first power conversion module 11 is enabled, the external power is converted into at least one working power (VOUT), and the working power (VOUT) is further passed through the first output end 116. Output to the load. Moreover, the first power conversion module 11 generates a power good signal (P_G) after the normal startup, and the power good signal (P_G) can be transmitted to the load by the power supply 100 via an information transmission line, so that the load The power supply status of the power supply 100 can be determined based on the power good signal (P_G). In an embodiment, the first power conversion module 11 is designed based on the ATX specification, and after being enabled, generates a plurality of working powers, and the working powers (VOUT) include at least 12V, -12V, 5V, and 3.3V. Power level. Moreover, in the embodiment, the first power conversion module 11 includes a plurality of the first output ends 116, and each of the first output terminals 116 independently transmits one of the working powers (VOUT).

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 . After the power supply 100 obtains the external power, the power conversion module 12 normally converts the external power into a backup power (VSB), and the backup power (VSB) provides the resident circuit of the load when the load is not started. Still work. 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, and a second modulation unit 123 connected to the second transformer 122. The second power switching unit 121 and the second feedback control unit 124 of the second modulation unit 123 are connected to a second auxiliary power unit 125 and a second output terminal 126. The second power switching unit 121 and the second The working concept of the transformer 122, the second modulation unit 123, and the second feedback control unit 124 and the first power switching unit 111, the first transformer 112, and the first of the first power conversion module 11 The modulation unit 113 and the first feedback control unit 114 are the same, and details are not described herein again. In addition, the second auxiliary power unit 125 is used to maintain the power required for the normal operation of the second power switching unit 121 and other electronic components of the second power conversion module 12 during initial startup and after startup. In addition, the second auxiliary power unit 125 is further connected to the first auxiliary power unit 115. Therefore, when the second auxiliary power unit 125 normally outputs the backup power (VSB) in the second power conversion module 12, the second auxiliary power unit 125 will simultaneously provide power to the first auxiliary power unit 115. The first auxiliary power unit 115 is enabled to provide the first power switching unit 111 with power required for startup. Further, the present invention defines that the power supply target of the second auxiliary power unit 125 is a power supply load of the second auxiliary power unit 125, and specific components of the power supply load may be referred to above, and details are not described herein again.

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

Referring to FIG. 2, the switch 13 is connected between the first output end 116 and the second output end 126. The switch 13 can be a bipolar transistor (BJT) or a metal oxide. Semiconductor field effect transistor (MOSFET). Moreover, when the first power conversion module 11 has a plurality of the first output ends 116, the switch 13 outputs the working power (VOUT) power level and is output in the plurality of first output ends 116. One of the same power levels of the backup power (VSB), for example, the power level of the backup power (VSB) is 5V, so the switch 13 is disposed in the plurality of first output ends 116. It is used to output one of the working power (VOUT) of 5V. Moreover, the control module 14 includes a switch control unit 15 connected to the changeover switch 13 and a buck adjustment unit 16 connected to the second power conversion module 12. Furthermore, the switch control unit 15 may be formed by a plurality of switching elements 151, 152, the switch control unit 15 There is a signal output terminal 153 connected to the changeover switch 13, as shown in FIG. 3, the change of the signal output terminal 153 will control the opening and closing of the changeover switch 13. Further, the switching elements of the switch control unit 15 generate a continuous opening and closing after receiving the power good signal P_G, and finally a voltage source 154 connected to the switch control unit 15 can change the signal output end 153. The voltage causes the switch 13 to be turned on.

Referring to FIG. 4 to FIG. 6 , the control module 14 has a switch control unit 15 that does not receive the power good signal (P_G), so that the switch 13 is not turned on to enable the backup power (VSB) to continue. a first state of the output, and the switch control unit 15 accepts the power good signal (P_G) to turn the switch 13 into conduction while the buck adjusting unit 16 is activated and the second power conversion module 12 is enabled. The output of the backup power (VSB) is stepped down so that the operating power introduced via the switch 13 can replace the second state of the backup power output (VSB). It is further explained that, firstly, when the power supply 100 is connected to the external power source 200 and is in an unactivated state, the first power conversion module 11 is not enabled because the activation signal is not obtained, and the first power conversion module is not enabled. Group 11 did not generate this power good signal (P_G). At this time, the switch control unit 15 causes the switch 13 to be in a non-conducting state because the power good signal (P_G) cannot be obtained, and thus the backup power (VSB) is maintained by the second output 126. Output to the load. Furthermore, if the power supply 100 receives the activation signal transmitted by the load and enters the startup state, the first power conversion module 11 will provide the work after the startup process is completed, by the first output 116. In addition to the load (VOUT), the power good signal (P_G) is also generated, and the control module 14 will enter the control routine of the second state. At this time, the switch control unit 15 turns on the switch 13 after the power good signal (P_G) is obtained, that is, the first output 116 and the second output 126 connected to the switch 13 are connected. There is a short circuit between them. At the same time, the buck adjusting unit 16 is also activated by obtaining the power good signal (P_G), and the buck adjusting unit 16 changes the a control factor of the second power conversion module 12, so that the power level of the backup power (VSB) output by the second power conversion module 12 is lower than the backup output in the first state. The power level of electricity (VSB). For example, when the control module 14 is in the first state, the power level of the backup power (VSB) is the same as the feedback control signal generated by the second feedback control unit 124, and is 5V. In the second state, the second feedback control unit 124 is interfered by the buck adjustment unit 16 to generate different feedback control signals, and the power level of the backup power (VSB) is reduced to 3V. Thereafter, the working power (VOUT) will be injected into the second output terminal 126 such that the second power module backup power level is higher than the feedback control signal, and the second power switching is forced by the second feedback control unit 124. The unit 121 stops operating, so that the working power (VOUT) replaces the backup power (VSB) output to the load. In this way, the second power conversion module 12 will have no output, and the power supply 100 will be powered by the first power conversion module 11 (ie, when the control module enters the second state), The second power conversion module 12 has no output and can improve the overall efficiency of the power supply 100, thereby avoiding excessive unnecessary loss of the power supply 100.

Furthermore, in the previous embodiment, in the second state, when the buck adjusting unit 16 receives the power good signal (P_G), the buck adjusting unit 16 will change the second feedback control unit 124. The feedback control signal is generated to cause the power level of the backup power (VSB) output by the second power conversion module 12 to decrease thereafter. Moreover, 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, and the first output power module 11 is compared to the power output of the first power conversion module 11 The auxiliary power unit 115 replaces the power transmitted by the second auxiliary power unit 125, and the first auxiliary power unit 115 outputs power to the power supply load of the second auxiliary power unit 125. In this way, the second power conversion module 12 has no standby output generated by the second auxiliary power unit 125 except for no output, and can improve the overall efficiency of the power supply 100.

The present invention has been described in detail above, but the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the equivalent of the patent application scope of the present invention. Changes and modifications are still covered by the patents of this creation.

Claims (7)

A power supply is connected to an external power source to obtain an external power. The power supply includes: a first power conversion module having at least one first output, the first power conversion module being enabled and converted The external power provides at least one working power through the first output end, and generates a power good signal; a second power conversion module, the power conversion efficiency is lower than the first power conversion module, and has a second output End, the second power conversion module normally converts the external power to provide a backup power via the second output after the power supply obtains the external power; and a switch that connects the first output end and the second power And a control module comprising a control unit connected to the switch and a buck adjustment unit connected to the second power conversion module, the control module having a control module not receiving the The power good signal sometimes causes the switch to be un-conducted to cause the backup power to continue to output the first state, and the control module accepts the power good signal to cause the switch Turning the switch into conduction, simultaneously causing the step-down adjusting unit to start and causing the backup power output by the second power conversion module to be stepped down, so that the working power transmitted through the switching switch can replace the backup power output Two states. The power supply device of claim 1, wherein the second power conversion module includes a feedback control unit, the buck adjustment unit is coupled to the feedback control unit, and the buck adjustment unit is in the second state Receiving the power good signal and changing a feedback control signal of the feedback control unit causes the power level of the backup power output by the second power conversion module to decrease thereafter. The power supply device of claim 1 or 2, wherein the first power conversion module has a first auxiliary power unit, and the second power conversion module has a second connection with the first auxiliary power unit An auxiliary power unit, wherein the second auxiliary power unit will have no output in the second state, and the first auxiliary power unit outputs power to a power supply load of the second auxiliary power unit in the second state instead of the first power unit The output of the secondary auxiliary power unit. The power supply device of claim 3, wherein the first power conversion module includes a plurality of the first output terminals for respectively outputting the working power of different power levels, and the switch is connected to the first One of the power levels in an output is the same as the power level of the backup power. The power supply of claim 4, wherein the backup power has a power level of 5V or 12V or 3.3V. The power supply device of claim 1 or 2, wherein the first power conversion module includes a plurality of the first output terminals for respectively outputting the working power of different power levels, and the switch is connected to the The power level in the first output is one of the same power level as the backup power. The power supply of claim 3, wherein the backup power has a power level of 5V or 12V or 3.3V.