TWM412397U - Power supply - Google Patents

Description

M412397

‘In particular, it can reduce power loss. 5. New description: [New technical field] [0001] This case is about a power supply for a power supply. [Prior Art] [0002] With the advancement of technology, various electronic products, such as computer devices, have become an indispensable part of modern life, and all of these electronic products require a power supply. powered by.

The power supply needs to provide appropriate operating voltages to electronic products, such as various electronic devices in computer devices, such as hard disk drives, optical drives, and motherboards, so that the electronic devices can operate normally. The conventional power supply II will have a main power supply circuit, which is implemented by a circuit architecture with high power conversion efficiency, such as 90%, resonant, push-pull, forward or buck, for use as an electronic The product is in power

When the Power 〇n) state operates, the received power is converted into a complex number

Not? The operating voltage of the level, such as 3.3V, 5V, nl2v, etc., is provided to various electronic devices in the electronic product, so that the device can operate normally. Amazing [0004] Tian Electronics products in the power off (p〇wer 〇ff) shaped bears stop operation _ 泰 ^ m if.,, the power supply is required to provide standby voltage (standby 〇 1 We) to the electronic unit In the middle of the low-power standby source, the basic operation is opened, for example, the power indicator light is turned on, etc., therefore, the Xiyuan supply will have an auxiliary power supply circuit, which will replace the received watch number with the standby voltage. For example, 5V, when the electronic product is on page 3 of 29th page, M412397 [0005] is turned on or off, and is used by the standby circuit of the system. Since the conventional power supply has a standby circuit to provide standby _ the conversion efficiency for the system unit is relatively lower than that of the auxiliary power supply circuit (10) M ^ road ', for example, 7〇%, and the cost is cheap source supply =: :, the road architecture to achieve, and thus reduce the power [0006] Although the conventional power supply of the power supply is indeed reduced by the auxiliary power supply circuit architecture using a flyback circuit architecture, however, due to the auxiliary power supply circuit The power conversion effect is poor, so when the electronic product is turned on, the main power supply circuit and the auxiliary power supply circuit of the conventional power supply respectively supply the operating voltage and the standby voltage to the electronic product. At the same time, the power conversion efficiency of the auxiliary power supply circuit is relatively large, and the current electronic products are moving toward energy saving and reducing the consumption. Therefore, the conventional power supply device cannot meet the actual demand.

[0007] Therefore, how to develop a power supply that can improve the above-mentioned conventional technology and the auxiliary power supply circuit can still be realized by a relatively inexpensive circuit structure is an urgent problem to be solved.

[0008] [New content] The main purpose of the present invention is to provide a power supply device, which can solve the problem that the conventional power supply device can not improve the power conversion efficiency of the power supply at the same time, and thus has a large power loss. Missing. In order to achieve the above objective, a preferred embodiment of the present invention provides a power supply for supplying power to a system unit, comprising: a main power circuit having a first output for selectively responding to a start signal of the system unit Input form number A0101 Page 4 of 29 [0009] The first operation 1 pressure to the first-transmission (four), and according to the first-no reach the rated Μ value and rhyme (10) more output represents the warning signal of the main power circuit operating state Auxiliary power supply circuit with auxiliary output terminal 'and output standby voltage to auxiliary wheel output terminal; first-switch circuit 'connected between the output terminal and the standby circuit of the system unit; second switch circuit connected to the auxiliary wheel And the switch control circuit is connected with the main power circuit, the control end of the first switch circuit and the control end of the second switch circuit for responding to the power state signal and the alarm number (4) the first switch circuit And the second_circuit is alternately turned on or off to enable the first operating voltage to be transmitted to the standby circuit via the first switching circuit, or to cause the standby voltage to be transmitted to the standby circuit via the second switching circuit, The electrical energy required for the standby circuit. [Embodiment] [0010] Some typical implementations that embody this pure sign and advantages are described in detail in the description of the latter paragraph. It is to be understood that the present invention is capable of various modifications in the various aspects of the present invention, and the description and drawings are intended to be illustrative in nature rather than limiting the present invention. [0011] Please refer to FIG. 1 for a schematic diagram of a circuit structure of a power supply applied to an electronic product according to a preferred embodiment of the present invention. As shown in the figure, the power supply 1 of the embodiment receives an AC power source AC, such as an AC voltage Vac provided by the utility, and converts the power of the AC house vac to supply power to the system unit 90 of one of the electronic products. The electronic product can be, for example, a personal computer, and the system unit 9 can be, for example, a motherboard, but not limited thereto, and the system unit 90 has a main circuit 91 and a standby circuit 92 ° when the electronic product is in the power supply. When the startup state is started and the startup is started, the system number of the form number A0101 is the same as that of the main circuit 9]. When the electronic product is turned off, the electronic product is turned off. The wire s _ ^ ”, before entering the standby mode, is operated by the standby circuit 92. In addition, the electronic product is started or turned off, that is, the corresponding system of the system is 90 When it is turned off, the system unit 9 outputs corresponding voltage levels, for example, 5V, or 4疋 voltage low level, for example, 〇V, respectively, by, for example, one of the standby circuits 92.

Ps-〇n signal V. [0012] The power supply 1 includes a pre-stage power supply circuit 1A, a post-stage power supply circuit, a first-switch circuit 13, a second switch circuit 14, and a switch control circuit 15: the pre-stage power supply circuit 1 . The AC voltage vac ’ is received; the electromagnetic noise of the w voltage Vae is considered and the AC voltage Vac is rectified to output a DC voltage transition voltage v . d

[0013]

The post-stage power supply circuit is electrically connected to the output end of the pre-stage power supply circuit i Q to receive the transition voltage vd' and includes - the main power supply circuit - the auxiliary power supply circuit 12, the main power supply circuit 11 is electrically connected to the pre-stage power supply circuit 10 and the main circuit Between the 91' and having a first output terminal 11a and a second output terminal 11b electrically connected to the main circuit 91, the main power supply circuit 11 receives the transition voltage Vd and selects the activation signal V outputted by the system unit 90. Sex

The pS^OH ground transition voltage Vd is respectively outputted as a direct current and has a first operating voltage V and a second operating voltage V of different rated voltage values to the first output terminal 1 la and the second output terminal 11b. In addition, the main power supply circuit 依据 is based on its own respective output, for example, whether the first operating voltage vq1 and the second operating voltage V〇2' reach their respective rated voltage values, and one of the micro-control units 110 correspondingly outputs one by itself. Power status signal PG 'For example, when the electronic product starts to start, the start signal vps Qn is high voltage form number A0101 Page 6 / 29 pages 100 years July 08 correction replacement page level 'main power circuit u The first operating voltage v and the second operating voltage v 01 〇2 are output to the main circuit 91' via the first output terminal iia and the second output k11b, respectively, to provide a circuit or electronic component required for operation of the main circuit 91. When the first operating voltage V and the second operating voltage ο 1 V〇2 reach their respective rated voltage values, the micro control unit U〇 outputs a power state signal pG corresponding to a high voltage level. On the other hand, when the first operating voltage v〇l and the second operating voltage have not reached their respective rated voltage values, that is, less than the respective rated voltage values, the micro control unit 11 〇 outputs the power source at a low voltage level correspondingly. The status signal pG, in addition, when the electronic product is turned off and the startup signal v is at a low voltage level, the main power ps-on source circuit 11 stops outputting the first operating voltage and the second operating voltage V〇2. The micro control unit 11() also outputs a power status signal PG that is at a low voltage level. [0014] In addition, the main power supply circuit 11 outputs an alarm V 1 5 through the internal micro control unit 11 to a signal output according to its own operating state, wherein when the main power circuit 11 is operating normally, The warning signal is a low voltage level, such as 0V. However, once the main power circuit is abnormal, such as due to short circuit, overload or the first operating voltage and the second operating voltage v 2 is abnormal, the warning is given. The signal Vi is converted to a high voltage level 'for example 5 V. [0015] The auxiliary power supply circuit 12 is electrically connected to the output end of the front stage power supply circuit 1〇 and is connected in parallel with the main power supply circuit ' and has an auxiliary output terminal i2a for receiving and converting the transition voltage. v, to output a standby voltage v having a rated voltage value via the d auxiliary output terminal 12a, wherein the rated voltage value of the standby voltage 乂3 is substantially equal to the first operating voltage v Form No. A010I Page 7 of 29 M412397 100 Corrected the replacement rated voltage value on July 08 of the year. [0016] In the above embodiment, the main power circuit 11 can be, but not limited to, a DC/DC converter, and can have a high power conversion efficiency, for example, a power conversion efficiency of 90%, and a resonant, push-pull A DC/DC converter such as a directional, forward or buck. The auxiliary power supply circuit 12 can be, but not limited to, a DC/DC converter, and can be converted by a power supply with a relatively low power conversion efficiency of less than the main power supply circuit 11, but the cost of the DC/DC converter is as low as 70%. A compact DC/DC converter. [0017] The first switch circuit 13 is electrically connected between the first output end 11a of the main power supply circuit 22 and one of the power supply input terminals 92a of the standby circuit 92, and the second switch circuit 14 is electrically connected to the auxiliary power supply circuit 12. The auxiliary output terminal 12a and the power input terminal 92a of the standby circuit 92, and the control terminal of the first switch circuit 13 and the control terminal of the second switch circuit 14 are electrically connected to the switch control circuit 15, the first switch circuit 13 and The second switching circuit 14 is controlled to be turned on or off by the control of the switching control circuit 15, respectively. [0018] The switch control circuit 15 is electrically connected to the main power supply circuit 11, and receives the power status signal PG and the warning signal 乂1 output by the micro control unit 110 of the main power supply circuit 11, and responds to the power status signal PG. And the warning signal Vi controls the first switch circuit 13 and the second switch circuit 14 to be turned on or off alternately, so that the first operating voltage V is transmitted to the standby circuit 92 via the first switch circuit 13, or the standby voltage V is passed through the first Two switch circuit 14 transmits standby circuit

S 92, to provide the power required by the standby circuit 92. [0019] In this embodiment, when the electronic product is in the power-off state and is turned off, the standby circuit 92 outputs the low-voltage level activation signal V, driving the ps-on form number A0101, page 8 of 29, M412. 397, July 8, 100, the replacement page main power circuit 11 does not operate, the switch control circuit 15 also controls the first switch circuit 13 to be turned off according to the low voltage level power state signal PG, and the second switch circuit 14 is turned on, thus assisting The standby voltage V outputted from the auxiliary output terminal 12a of the power supply circuit 12 is transmitted to the standby power via the second switching circuit 14.

S-channel 92 is provided to provide the electrical energy required for operation of standby circuit 92. [0020] When the electronic product starts to be turned on from the power-off state to the power-on state, the startup signal V outputted by the standby circuit 92 is controlled by the low voltage ps-on.

The bit transitions to a high voltage level, driving the main power supply circuit 11 to start operating and outputting the first operational voltage V and the second operational voltage V via the first output terminal 11a and the second output terminal lib, respectively. The main circuit 91 is provided to supply the power required for the operation of the main circuit 〇1 〇2 91. [0021] Meanwhile, if the respective outputs of the main power supply circuit 11 itself, for example, the first operational voltage V, and the second operational voltage V. When the respective rated voltage values are reached, ο 1 〇2 makes the power state signal PG a high voltage level, and when the main power circuit 11 is in normal operation and the warning signal 乂1 is at a low voltage level, the switch control circuit 15 The first switching circuit 13 is turned on and the second switching circuit 14 is turned off according to the power state signal PG of the high voltage level and the warning signal Vi of the low voltage level, so that the first output end 11a of the main power circuit 11 outputs the first The operating voltage V is transmitted to the standby circuit 92 via the first switching circuit 13, and the standby voltage V outputted from the auxiliary output terminal 12a of the auxiliary power supply circuit 12 is not transmitted to the standby power due to the second switching circuit 14 being turned off.

S-channel 92, at this time, the power required for the operation of standby circuit 92 is changed by the first operating voltage V. 〇1 [0022] Conversely, if the main power circuit 11 is abnormal and the warning signal Vi is at a high voltage level, the warning signal Vi drives the switch control circuit 15 to continuously control the form number A0101, page 9 / page 29, 100 years On July 08, the replacement page 1 is turned off and the second switch circuit 14 is turned on, so that the standby circuit 92 still receives the standby voltage V outputted by the auxiliary power supply circuit 12 at the auxiliary output terminal 12a via the second switch circuit 14. .

S

[0023] As can be seen from the above, when the electronic product is activated and the respective outputs of the main power supply circuit 11 reach their respective rated voltage values, and the main power supply circuit 11 is normal, the switch control circuit 15 controls the first switch circuit 13 to be turned on. And the second switching circuit 14 is turned off, so that the first operating voltage V is transmitted to the standby circuit 92 via the first switching circuit 13, so that the standby circuit 92 is powered by the power supply 1 having a higher power conversion efficiency. The power supply circuit 11 supplies power. When the electronic product 4 is turned off, and the respective outputs of the main power supply circuit itself have not reached the respective rated voltage values or the main power supply circuit 11 has an abnormality, the switch control circuit 15 controls the first switching circuit 13 to be turned off and the first The second switch circuit 14 is turned on, and the standby voltage Vs is transmitted to the standby circuit 92 via the second switch circuit 14, so that the standby circuit 92 is powered by the auxiliary power supply circuit 12 having a lower power conversion efficiency in the power supply 1, such that In this case, the power output efficiency of the power supply 1 of the present invention can be improved compared with the conventional power supply, thereby reducing the loss of the power supply, for example, when the power supply of the present case is When the rated output power of 1 is 1 000 watts, if the electronic products supplied by the power supply 1 are light load (20%), general load (50%) and full load (100%), the power supply of the case 5%至0. 5%和0. 3〜0.4%。 The power output efficiency of the power supply can be increased by 0.5% to 0. 5%, 0. 5% and 0. 3~0.4%. At the same time, since the auxiliary power supply circuit 12 of the present invention can still be implemented by a relatively inexpensive circuit structure, the production cost of the power supply 1 of the present invention can also be reduced. [0024] In some embodiments, the first operating voltage ¥, and the nominal voltage of the standby voltage V may be 5V and the second operating voltage V. The rated voltage value can be 〇2 Form No. A0101 Page 10 of 29 M412397 The correction of the replacement of 100, 3 V, 12 V or -12 V on July 8, 100, but not limited to this. In addition, the output of the main power supply circuit 11 and the number of output operating voltages are not limited to two as shown in the first figure, and may, for example, have only one output terminal and output an operating voltage, or for example There are three or more output terminals and three or more operating voltages. In addition, the power state signal PG is not limited to the first operating voltage V as described above, and the second operating voltage V ^ is equal to each other.额定Δ of the rated voltage value and the high and low voltage levels

The change is actually based on whether all of the operating voltages outputted by the main power supply circuit 11 have reached their respective rated voltage values and correspond to changes in the high and low voltage levels. [0025] Please refer to the second figure, and cooperate with the first figure, wherein the second figure is a schematic diagram of a part of the detailed circuit structure of the power supply shown in the first figure. As shown in the first and second figures, the first switching circuit 13 includes a first switching element ', a second switching element m2, a first diode 〇1, and a third diode d2. The first switching element 'and the second switching element' are connected in series between the input terminal 92a of the standby circuit 92 and the first output terminal 11a of the main power supply circuit 11, and in some embodiments, the first switching element 1 And the second switching element can be formed by, but not limited to, an N-type metal oxide semiconductor field effect transistor (MOSFET). The cathode end of the first diode [^ is electrically connected to the control terminal of the first switching element ^. The cathode end of the second diode 〇 2 is electrically connected to the control terminal of the second switching element m2. The second switching circuit 14 includes a third switching element ^, a fourth switching element, a third diode DQ & - a fourth diode L. The third switching element 1^ and the fourth switching element Μ are connected in series to each other in the standby circuit 92 〇4 Form No. A0101, page 11 / page 29, supplemented by the power supply circuit 12, and in some embodiments, ^mmiza^rsi It can be used for the control of the anode and the second switching element of the second and last poles of the metal oxide semiconductor field of the second type. Terminal a flute 4 is electrically connected. • and fourth switching element Μ, control terminal [0027] The switching control circuit 15 mainly includes a comparison unit 151. The comparison terminal TM _ early U5G and the output terminal of the second unit of the second and the first switching circuit 13 are electrically connected... The anode end of the diode D1 and the cathode end of the third diode D3 are electrically connected, and Including - first - comparison (four) 1A_fifth: wherein the fifth diode, the cathode of the cathode is electrically connected to the input of the first - comparison unit 150 to receive the start signal V, and the anode end of the fifth two -5 The first comparator CP1 is non-two: the input terminal is connected: therefore, the non-inverting input terminal of the first comparator m receives the power state signal PG via the fifth diode d5. The inverting input end of the first comparator milk is connected to the output of the first comparison unit 150 by the receiving end of the reference signal vreb-comparator CP1. [0028] The second V. The input end of the comparing unit 151 receives the warning signal 'and the reference signal, and the output end of the second comparing unit 151 is connected to the anode end of the second diode D and the fourth diode d4. The cathode end is electrically connected and includes a first comparator CP2 and a sixth diode V. The anode end of the sixth diode D6 is electrically connected to the input end of the second comparison unit 151 to receive the warning signal v 'sixth The cathode end of the diode body is electrically connected to the opposite input end of the second comparator cp2, so the reverse input end of the second comparison grab 2 is via the sixth form number A0101 page 12 / 29 pages [ 0029] Correction replacement page for July 08, 100—The polar body d6 receives the warning signal v丨. The inverting input terminal of the second comparator CP2 receives the reference signal Vref, and the output terminal of the second comparator CP2 is electrically connected to the output terminal of the second comparing unit 151. The standby main power circuit 11 outputs a power state signal PG whose voltage level is higher than the high voltage level of the reference voltage because the respective outputs reach their respective rated voltage values, and the main power circuit 11 is normally operated and the output voltage level is less than the reference. When the warning signal of the low voltage level of the voltage vref is ', the first comparator CP1 outputs the first comparison signal v of the voltage level, and is transmitted to the control end of the first switching element μ via the first diode Zhao D. The first switching element ' is turned on by the driver *1, and the second comparator CP2 also outputs the second comparison signal Vc2' of the high voltage level and transmitted to the L-th switching element via the second diode d. The second switching element 13 is driven to turn on, causing the first switching circuit 13 to be in a conducting state, and at the same time, the first comparison signal vel& the second comparison signal ve2 is at a high voltage level, so that the third diode 1 > 3 and the fourth diode d4 form an open circuit, thereby driving the third switching element M3 and the fourth switching element to be turned off, causing the second switching circuit 14 to be in a state of being turned off, as in the standby circuit 92 required. Electricity Then, the operation is provided by a first voltage V. 〇1 [0030] However, if the output of the main power supply circuit 11 itself has not reached the respective rated voltage value or the startup signal V is at the low voltage level, the output voltage level of the main ps-on power supply circuit 11 is less than the reference voltage. When the power state signal PG of the low voltage quasi ref bit of V f is, the first comparator CP1 outputs the first comparison signal Vel of the low voltage level, and is transmitted to the third switching element 143 via the first triode D3 and the first comparator The control terminal of the four switching element ^ is driven to turn on the third switching element MQ and the fourth switching element ^, resulting in the second switching circuit 14 0 ** Form No. A0101 Page 13 of 29 M412397 - July 08, 100 The Japanese switch is replaced by the state of the page. At the same time, because the first comparison signal V is at a low voltage level, the first diode DjB is opened, thereby driving the first switching element to be turned off, resulting in the first switching circuit 13 In the off state, the power required by the standby circuit 92 is supplied from the standby voltage V.

S

[0031] In addition, if the main power supply circuit 11 is abnormal and the output voltage level is higher than the reference voltage V, the high voltage level warning signal V, the second comparator CP1 ref 1 outputs the low voltage level. The second comparison signal ve2 is transmitted to the third switching element and the control terminal 4 of the fourth switching element I via the fourth diode 匕 4

In order to drive the third switching element to be rolled and the fourth switching element Μ to be turned on, causing the second switching circuit 14 to be in a conducting state, and at the same time, the second comparison signal Vc2 is at a low voltage level, so that the second diode 〇 2 forming an open circuit, thereby driving the second switching element M2 to be turned off, causing the first switching circuit 13 to be in an off state. For example, the power required by the standby circuit 92 is supplied by the standby voltage V. [0032] In the above embodiment, the first comparing unit 20 may be, but not limited to, having a first hysteresis resistance, a second hysteresis resistor 1?2, and a hysteresis diode D7, and the first hysteresis resistor\ The second hysteresis resistor % and the hysteresis diode D7 are connected in series between the non-inverting input terminal and the output terminal of the first comparator CP1, the first hysteresis resistor \, the second hysteresis resistor 1?2, and the hysteresis two The polar body d7 is used to make the first comparator CP1 form a hysteresis comparator and has a hysteresis function. [0033] Please refer to the third figure, which is a modification of a part of the detailed circuit structure of the power supply shown in the second figure. As shown in the third figure, in some embodiments, when the main power supply circuit 11 is short-circuited and the power required by the standby circuit 92 needs to be switched from the first operating voltage V to the standby voltage V, in order to enhance the switching 1 s form No. A0101 Page 14 of 29 Correction replacement page for the first switching element of the first switching circuit 13 and the second switching element ^

And the third switching element Μ and the fourth switching element M ^ 4 of the second switching circuit 14 switch the speed to cancel the first operating voltage 待机 and the standby voltage v due to the first Λ s switch circuit 13 or the first switching circuit 14 The speed of the switching is not fast enough to affect each other. The first comparing unit 150 further has a first voltage dividing circuit 15A and a first voltage regulating resistor R3, and the second comparing unit 151 further has a second voltage dividing circuit 1510. And a second voltage regulating circuit, the first voltage dividing circuit 15 is connected to the first output end 11a of the main power circuit 而 and receives the first operating voltage V〇i for the first operating voltage, ^ The voltage division is performed, and the first voltage dividing circuit 1500 may be, but not limited to, a first voltage dividing resistor R and a second voltage dividing resistor R6 connected in series to each other. The first voltage regulating resistor is electrically connected between the first voltage dividing circuit 1500 and the non-inverting input terminal of the first comparator CP12. [0034] The second voltage dividing circuit 1510 is connected to the first output end 11a of the main power circuit u and receives the first operating voltage ν〇ι for dividing the first operating voltage v 1 , and the first point The voltage circuit 121 can be configured by, but not limited to, a third voltage dividing resistor % and a fourth voltage dividing resistor connected in series to each other. The second voltage regulating resistor 1?4 is electrically connected between the second voltage dividing circuit 1510 and the non-inverting input terminal of the second comparator CP1. [0035] When the main power circuit 11 is short-circuited, a very large current may be output, causing the first operating voltage ν〇1 to rapidly decrease, so that the first voltage dividing circuit 1500 and the first voltage regulating resistor can be used. The state of the first operating voltage is immediately reacted to the non-inverting input terminal of the first comparator CP1, and the first operating voltage v〇 can be obtained by the second voltage dividing circuit 1510 and the second voltage regulating resistor %. The state of I immediately reacts to the inverting input of the second comparator CP1, so that the first switching element 'and the second switching element can be raised. Form No. A0101 Page 15 of 29 M412397 100 July On the 08th, the switching speed of the replacement page, the third switching element \ and the fourth switching element ^ is verified. [0036] In addition, in some embodiments, as shown in the third figure, one of the first resistors 9 and the second diodes connected in parallel with the first diode D1 may be respectively disposed in the first switching circuit 13. The body 2 is connected in parallel with one of the second resistors Ry, and by adjusting the resistance of the first resistor R9, the time during which the first switching element is switched from the on state to the off state can be extended and the first switching element M1 can be shortened. When the state is switched to the on state, and the resistance of the second resistor R1() is adjusted, the time during which the second switching element M2 is switched from the on state to the off state can be extended and the second switching element m2 can be switched from the off state. The time to turn on the state. [0037] Of course, the second switch circuit 14 can also be respectively disposed with a third resistor Rn connected in parallel with the third diode 〇3 and a fourth resistor R12 connected in parallel with the fourth diode D4. By adjusting the resistance values of the third resistor Rn and the fourth resistor R12, the time for switching the third switching element and the fourth switching element from the on state to the off state and shortening the third switching element Μ 3 and the fourth switch can be extended. Component Μ, the time from the off state to the on state. In addition, the second switch circuit 14 further has a first capacitor (^, electrically connected to the third switching element Μ, and the fourth switching element Μ, between the control terminal and the ground terminal G for filtering. In addition, in order to detect whether the standby current I received by the input terminal 92a of the standby circuit 92 has an overcurrent generated, and in some embodiments, such as the third

As shown in FIG. 1, the power supply 1 further has an overcurrent detecting circuit 16 electrically connected between the first switching circuit 13, the second switching circuit 14, and the input terminal 92a of the standby circuit 92. To detect the standby current I, and when the standby current I is greater than a predetermined value, generate an overcurrent signal

S S Form No. A0101

Page 16 of 29 [0039] On July 8, 100, Yongzheng replaced page number V. 1 The overcurrent detecting circuit 16 may include a first junction detecting resistor R, a second detecting resistor R, a PNP double carrier power meter, 13 male 14 electric day, body, optical coupler 160,

The three-divided circuit 161, a fifth resistor R, and a ruler 15 and a sixth resistor R. The first detecting resistor r13 and the second detecting circuit are connected in parallel between the first switching circuit 13, the second closing circuit 14 and the wheel terminal 92a of the standby circuit 92, and the resistance of the second detecting resistor R13 is greater than the first detecting Resistance Ri4. The third voltage dividing circuit 161 is electrically connected to the first detecting resistor, the second detecting resistor % and the ground terminal G, and the emitter pole of the P double carrier transistor I is electrically connected to the first switching circuit 13 and the first switching circuit 14. The pnp double-carrier electric \ body's episodes are electrically connected to the sixth resistor \6. The fifth resistor and the fifth series are electrically connected between the base terminal of the PNP bipolar transistor and the third sub-piezo 5161. The sixth resistor ri6 is further electrically connected to the input end of the photocoupler 160. [0040] When the standby current Is is greater than a predetermined value such that the standby current and the voltage drop generated on the second detecting resistor R12 drive the PNP dual-carrier transistor to be turned on, part of the standby current IS passes through the turned-on PNP. The double carrier transistor Q flows into the input end of the optical coupler 16〇, so that the wheel-out terminal of the optical coupler 16 generates an overcurrent signal Vi corresponding to the received voltage source vcc, so the power supply In the above embodiment, the power supply 1 can be, but not limited to, having a filter circuit 1 7 as shown in the third figure, and the first The output ends of the switch circuit 13 and the second switch circuit u are electrically connected for filtering, and the filter circuit 17 can be, but not limited to, a second capacitor q and a third capacitor. ό When the main power circuit system [0042] in summary, 'this case provides a power supply supplier form number Α 0101 page 17 / 29 pages [0043] [0044] [0046] [0047] [0047] = each individual _ To the respective two-way control, the first switch circuit is turned on and the second switch circuit is turned off, so that the standby circuit is supplied by the power supply, and the supply power has a higher power conversion efficiency for the m power supply circuit. (4) The respective outputs have not been* When the road system (4) foot voltage value or the main power circuit is abnormal, 'switch control ^ Thai control - switch circuit wear and second switch circuit conduction ' make the circuit change from the power supply with auxiliary power supply circuit with lower power conversion efficiency Power supply, so - the power supply output efficiency of the power supply of this case is comparable to that of the conventional power source, and the user can be upgraded, thereby reducing the power of the power supply circuit. The circuit structure is realized, (4) can be reduced, and even worse, the power supply of the power supply of the present case is cheaper than the electronic components; the circuit only needs to utilize the cost required to be *. This case can be seen by anyone who is familiar with this technology. As for the scope of the patent application, it is modified for various purposes. [Simple description of the figure] The first picture: the efficiency curve of a typical power supply is shown in the second figure. : The second diagram is the schematic diagram of the first detailed circuit structure. The power supply unit shown in Fig. 2 is a schematic diagram showing the circuit structure of another part of the present modification. [Description of main component symbols] 9〇: Part of the system unit power supply _] 91 : Main circuit form No. A0101 Page 18 of 29 M412.397 Correction replacement page [0049] 92 July 08 : Standby circuit [0050] 92a : Auxiliary output [0051] 1 : Power supply [0052] 10 : Pre-stage power supply circuit [0053] 11 : Main power supply circuit [0054] 110 : Micro control unit [0055] 11 a : First output

1 lb : second output terminal [0057] 1 2 : auxiliary power supply circuit [0058] 12a : auxiliary output terminal [0059] 1 3 : first switching circuit [0060] 1 4 : second switching circuit [0061] 15: Switch control circuit

[0062] 1 5 0 : first comparison unit [0063] 1 500 : first voltage dividing circuit [0064] 151 : second comparison unit [0065] 1510 : second voltage dividing circuit [0066] 16 : over current Detection circuit [0067] 160: Optocoupler [0068] 1 61 : Third voltage divider circuit Page 19 / 29 page form number A0101 M412397 July, 2007 ϋ 8th nuclear replacement page [0069] 17 : Filter circuit [0070] First to fourth switching elements 1 4 [0071] Qi : ΡΝΡ bi-carrier junction transistor [0072] CP Bu CP2: first to second comparator [0073]: first to sixth two Pole body 1 b [0074] D7: hysteresis diode [0075]: first to second hysteresis resistors [0076] RQ~R, first to second voltage-regulating resistors 3 4 [0077] RC~R. : first to fourth voltage dividing resistor Ο 〇 [0078] R9 to R12: first to fourth resistors [0079] R13 to RH: first to second detecting resistors [0080] R1C to Rie: fifth to sixth Resistor 1 D 1 0 [0081] V : AC voltage ac [0082] V": transition voltage d [0083] V 9 : first to second operating voltage 〇1 〇 2 [0084] VQ: first to second comparison Signal cl c2 [0085] V : Start signal ps-on [0086] Vi : Warning signal [0087] V.: Over current signal 1 [0088] V : Voltage source

C C Page 20 of 29

Form No. A0101 M412397 [0089] IS : Standby current [0090] AC : AC voltage source [0091] cr : First capacitor to third capacitor 〇 [0092] PG : Power status signal form number A0101 Page 21 of 29 By the way of the replacement page

Claims (1)

M412397 Correction of Miscellaneous Pages on July 8, 100. Patent Application Range: 1. A power supply for supplying power to a system unit, comprising: a main power circuit having a first output for responding One of the system units activates a signal to selectively output a first operating voltage to the first output terminal, and correspondingly outputs a power state signal according to whether the first operating voltage reaches a rated voltage value, and the output further represents that the main power circuit operates One of the status warning signals; an auxiliary power supply circuit having an auxiliary output terminal and outputting a standby voltage to the auxiliary output terminal; a first switching circuit connected to the first output terminal and one of the system unit standby circuits a second switching circuit is connected between the auxiliary output terminal and the standby circuit: and a switch control circuit is connected to the main power circuit, the control end of the first switch circuit, and the second switch circuit The control terminal is connected to control the first switch circuit and the second switch circuit to be alternately arranged according to the power state signal and the warning signal Passing or cutting off, the first operating voltage is transmitted to the standby circuit via the first switch | circuit, or the standby voltage is electrically transmitted to the standby circuit via the second switch, and the power required by the standby circuit is provided . 2. The power supply of claim 1, wherein the first output is further connected to a main circuit of the system unit, and the first operating voltage is transmitted to the main circuit via the first output. , 俾 provides the power required by the main circuit. 3. The power supply of claim 1, wherein the auxiliary power supply circuit has a lower power conversion efficiency than the main power supply circuit. 4. The power supply as described in claim 1, wherein the first shipment 100204355 Form No. A0101 Page 22 of 29 1003246630-0 M412397 Correction of the replacement page for the rated voltage of the voltage The value is equal to the rated voltage of the standby voltage. 5. The power supply of claim 1, wherein when the first operating voltage reaches a rated voltage value, the voltage level of the power state signal is greater than a reference voltage, and the main power circuit is normally operated. When the warning signal is less than a reference voltage, the switch control circuit controls the first switch circuit to be turned on and the second switch circuit to be turned off, so that the first operating voltage is transmitted to the standby circuit via the first switch circuit. 6. The power supply of claim 5, wherein the first When the operating voltage is less than the rated voltage value such that the voltage level of the power state signal is less than the reference voltage* or the main power circuit is abnormal such that the alarm signal is greater than the reference voltage, the switch control circuit controls the first switch circuit to be cut off. And the second switch circuit is turned on, and the standby voltage is transmitted to the standby circuit via the second switch circuit. 7. The power supply of claim 6, wherein the first power supply The circuit includes a first diode, a second diode, a first switching component and a second switching component, wherein the first switching component and the second switching component are connected in series to the input of the standby circuit Between the end and the first output end, the cathode end of the first diode is electrically connected to the control end of the first switching element, and the cathode end of the second diode is electrically connected to the second switching element 8. The power supply of claim 7, wherein the second switching circuit comprises a third diode, a fourth diode, a third switching component, and a fourth switching component. The third switching element and the fourth switching element are connected in series between the input end of the standby circuit and the auxiliary output end, the anode ends of the third and fourth diodes and the third switching element and the The control terminal of the fourth switching element is electrically connected. 100204355 Form No. A0101 Page 23 of 29 1003246630-0 M412397 ο 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 Receiving the power state signal and the reference signal, the output end of the first comparing unit is electrically connected to the anode end of the first diode and the cathode end of the third diode, the first comparing unit Comparing the power status signal and the reference signal, when the power status signal is greater than the reference signal, one of the output high level first comparison signals drives the first switching element to be turned on, and when the power status is When the level of the signal is less than the reference signal, the first comparison signal outputting the low level drives the first switching element to be turned off and the third switching element and the fourth switching element to be turned on. The power supply device of claim 9, wherein the first comparison unit comprises a first comparator and a fifth diode, wherein a cathode end of the fifth diode receives the power state a signal, the anode end of the fifth diode is electrically connected to the non-inverting input of the first comparator, and the inverting input of the first comparator receives the reference voltage, and the output of the first comparator The end system is electrically connected to the output of the first comparison unit. The power supply device of claim 10, wherein the first comparison unit comprises a first hysteresis resistor, a second hysteresis resistor, and a hysteresis diode, the first hysteresis resistor, the second hysteresis The resistor and the hysteretic diode system are connected in series between the non-inverting input terminal of the first comparator and the output terminal of the first comparator to enable the first comparator to have a hysteresis function. The power supply device of claim 10, wherein the first comparison unit further has a first voltage dividing circuit and a first voltage regulating resistor, and the voltage regulating resistor is electrically connected to the voltage dividing circuit. And the non-inverting input terminal of the first comparator, the first voltage dividing circuit receives the first operating voltage, and 100204355 Form No. A0101 Page 24 of 29 1003246630-0 M412397 Revised replacement page The first operating voltage divider is supplied to the first comparator via the first voltage regulator. Input. 13. The power supply of claim 8, wherein the switch is controlled The circuit includes a second comparison unit, the input end of the second comparison unit receives the warning signal and the reference signal, and the output end of the second comparison unit is coupled to the anode end of the second diode and the The cathode terminal of the quadrupole is electrically connected, and the second comparison unit is configured to compare the warning signal and the reference signal to output a second comparison of the high level when the level of the warning signal is less than the reference signal. The signal drives the second switching element to be turned on, and when the level of the warning signal is greater than the reference signal, the first comparison signal outputting the low level drives the second switching element to be turned off and the third switching element and the fourth The switching element is turned on. 14. The power supply of claim 13, wherein the second ratio The comparison unit includes a second comparator and a sixth diode, wherein the anode end of the sixth diode receives the warning signal, and the cathode end of the sixth diode and the second comparator The inverting input is electrically connected, the non-inverting input of the first comparator receives the reference voltage, and the output of the second comparator is electrically connected to the output of the second comparing unit. The power supply device of claim 10, wherein the second comparison unit further has a second voltage dividing circuit and a second voltage regulating resistor, wherein the second voltage regulating resistor is electrically connected to the Between the second voltage dividing circuit and the inverting input end of the second comparator, the second voltage dividing circuit receives the first operating voltage, and divides the first operating voltage by the second tuning A voltage resistor is provided to the inverting input of the second comparator. 16. The power supply of claim 1, wherein the main power circuit further has a second main output and outputs a second operating voltage, and 100204355 form number A0101 page 25 of 29 1003246630-0 M412397 July 8th, 100th, the replacement of the power supply circuit according to the first operating voltage and the second operating voltage to reach their respective rated voltage values corresponding to the output of the power state signal. 100204355 Form number Α0101 Page 26 of 29 1003246630-0