TWI575856B - Power supply module - Google Patents
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- TWI575856B TWI575856B TW105103348A TW105103348A TWI575856B TW I575856 B TWI575856 B TW I575856B TW 105103348 A TW105103348 A TW 105103348A TW 105103348 A TW105103348 A TW 105103348A TW I575856 B TWI575856 B TW I575856B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Description
本發明是有關於一種電源轉換器之技術，特別是具備補償線路損失功能的一種電壓供應模組。 The present invention relates to a power converter technology, and more particularly to a voltage supply module having a function of compensating for line losses.
電源轉換器於實際使用情況下會存在線路內阻所造成的線路損失。習知補償線路損失的方式有以輸出電壓檢測電路來檢測電源轉換器的輸出電壓的變化並予以補償。然而，額外設置的輸出電壓檢測電路將會使成本提升，並且加增產品的體積。 The power converter will have line loss caused by internal resistance of the line under actual use. Conventional methods for compensating for line losses include detecting and varying the output voltage of the power converter with an output voltage detection circuit. However, an additional set of output voltage detection circuits will increase the cost and increase the volume of the product.
此外，線路損失並非為固定值，當流經電路的負載電流越大時，所造成的線路損失越大，當流經電路的負載電流越小時，所造成的線路損失越小。因此，電源轉換器中線路內阻所造成的線路損失往往導致輸出電壓供應不穩定的現象。 In addition, the line loss is not a fixed value. When the load current flowing through the circuit is larger, the resulting line loss is larger. When the load current flowing through the circuit is smaller, the resulting line loss is smaller. Therefore, the line loss caused by the internal resistance of the line in the power converter often leads to an unstable output voltage supply.
為了改善上述的缺憾，本發明提供一種電壓供應模組，其包括有：變壓器、穩壓電路及補償電路。變壓器具有一次側和二次側，一次側接收直流電源並耦接控制開關，二次側具有輸出端，並感應直流電源而輸出一輸出電壓。穩壓電路耦接於變壓器的二次側。穩壓電路包括光耦合器、穩壓管、第一電阻、第二電阻、回饋電阻及回饋電容。光耦合 器具有第一端、第二端及第三端，第一端耦接輸出端，第三端耦接控制開關。穩壓管具有陰極端、陽極端及參考端，陰極端電性耦接第二端，陽極端耦接接地端。第一電阻具有第四端及第五端，第四端耦接輸出端，第五端耦接參考端。第二電阻具有第六端及第七端，第六端耦接參考端，第七端耦接接地端。回饋電阻的一端耦接陰極端。回饋電容的一端耦接回饋電阻的另一端，且另一端耦接參考端。補償電路包括：第一二極體、第二二極體及第三電阻。第一二極體的逆向端耦接於變壓器二次側與輸出端不相同的一端。第二二極體的逆向端耦接第一二極體的逆向端並耦接至變壓器二次側的打點端，順向端耦接接地端。第三電阻具有第八端及第九端，第八端耦接參考端，第九端耦接第一二極體的順向端。 In order to improve the above drawbacks, the present invention provides a voltage supply module including: a transformer, a voltage stabilization circuit, and a compensation circuit. The transformer has a primary side and a secondary side, the primary side receives the DC power supply and is coupled to the control switch, the secondary side has an output end, and induces a DC power supply to output an output voltage. The voltage stabilizing circuit is coupled to the secondary side of the transformer. The voltage stabilizing circuit includes an optocoupler, a Zener diode, a first resistor, a second resistor, a feedback resistor and a feedback capacitor. Optical coupling The first end, the second end and the third end are coupled to the output end, and the third end is coupled to the control switch. The Zener tube has a cathode end, an anode end and a reference end, the cathode end is electrically coupled to the second end, and the anode end is coupled to the ground end. The first resistor has a fourth end and a fifth end, the fourth end is coupled to the output end, and the fifth end is coupled to the reference end. The second resistor has a sixth end and a seventh end, the sixth end is coupled to the reference end, and the seventh end is coupled to the ground end. One end of the feedback resistor is coupled to the cathode end. One end of the feedback capacitor is coupled to the other end of the feedback resistor, and the other end is coupled to the reference end. The compensation circuit includes: a first diode, a second diode, and a third resistor. The reverse end of the first diode is coupled to a different end of the transformer from the secondary side and the output end. The reverse end of the second diode is coupled to the reverse end of the first diode and coupled to the striking end of the secondary side of the transformer, and the forward end is coupled to the ground. The third resistor has an eighth end and a ninth end, the eighth end is coupled to the reference end, and the ninth end is coupled to the forward end of the first diode.
本發明還提供另一電壓供應模組，其包括有變壓器、穩壓電路及補償電路。變壓器具有一次側和二次側，一次側接收直流電源並耦接第一開關，二次側具有輸出端，並感應直流電源而輸出一輸出電壓。穩壓電路耦接於變壓器的二次側。穩壓電路包括光耦合器、穩壓管、第一電阻、第二電阻、回饋電阻及回饋電容。光耦合器具有第一端、第二端及第三端，第一端耦接輸出端，第三端耦接第一開關。穩壓管具有陰極端、陽極端及參考端，陰極端電性耦接第二端，陽極端耦接接地端。第一電阻具有第四端及第五端，第四端耦接輸出端，第五端耦接參考端。第二電阻具有第六端及第七端，第六端耦接參考端，第七端耦接接地端。回饋電阻的一端耦接陰極端。回饋電容的一端耦接回饋電阻的另一端，且另一端耦接參考端。補償電路包括：二極體、第二開關及第三電阻。二極體的逆向端耦接於變壓器二次側與輸出端不相同的一端。第二開關具有第八端、第九端及控制端，第八端耦接二極體的逆向端並耦接至變壓器二次側的打點端，第 九端耦接接地端，控制端耦接同步整流電路。第三電阻具有第十端及第十一端，第十端耦接參考端，第十一端耦接二極體的順向端。 The invention also provides another voltage supply module comprising a transformer, a voltage stabilization circuit and a compensation circuit. The transformer has a primary side and a secondary side, the primary side receives the DC power supply and is coupled to the first switch, the secondary side has an output end, and induces a DC power supply to output an output voltage. The voltage stabilizing circuit is coupled to the secondary side of the transformer. The voltage stabilizing circuit includes an optocoupler, a Zener diode, a first resistor, a second resistor, a feedback resistor and a feedback capacitor. The optical coupler has a first end, a second end, and a third end. The first end is coupled to the output end, and the third end is coupled to the first switch. The Zener tube has a cathode end, an anode end and a reference end, the cathode end is electrically coupled to the second end, and the anode end is coupled to the ground end. The first resistor has a fourth end and a fifth end, the fourth end is coupled to the output end, and the fifth end is coupled to the reference end. The second resistor has a sixth end and a seventh end, the sixth end is coupled to the reference end, and the seventh end is coupled to the ground end. One end of the feedback resistor is coupled to the cathode end. One end of the feedback capacitor is coupled to the other end of the feedback resistor, and the other end is coupled to the reference end. The compensation circuit includes: a diode, a second switch, and a third resistor. The reverse end of the diode is coupled to a different end of the transformer from the secondary side and the output end. The second switch has an eighth end, a ninth end and a control end, and the eighth end is coupled to the reverse end of the diode and coupled to the striking end of the secondary side of the transformer, The nine end is coupled to the ground end, and the control end is coupled to the synchronous rectification circuit. The third resistor has a tenth end and a tenth end, the tenth end is coupled to the reference end, and the tenth end is coupled to the forward end of the diode.
本發明的電壓供應模組於一次側的開關斷開後，利用二次側的補償電路中存在的電壓值(即圖1中二極體42上的跨壓的值VD2，或圖2中開關43上的跨壓的值)以及藉由並聯形成補償電阻而得以與電阻(R1)產生較高的比例，以致使所輸出的補償電壓與二次側電路迴路的負載電流及所述的電壓值具有正相關，且補償電壓與補償電阻具有負相關，如此一來，就能在輸出補償電壓的同時補償線路壓降的損耗，進而維持輸出電壓的穩定度。 The voltage supply module of the present invention utilizes the voltage value existing in the compensation circuit of the secondary side after the switch on the primary side is turned off (ie, the value of the voltage across the diode 42 in FIG. 1 V D2 , or in FIG. 2 The value of the voltage across the switch 43) and the formation of the compensation resistor in parallel to generate a higher ratio with the resistor (R1), so that the output of the compensation voltage and the load current of the secondary circuit and the voltage The value has a positive correlation, and the compensation voltage has a negative correlation with the compensation resistor. In this way, the line voltage drop loss can be compensated while outputting the compensation voltage, thereby maintaining the stability of the output voltage.
100、200‧‧‧電壓供應模組 100, 200‧‧‧ voltage supply module
10‧‧‧變壓器 10‧‧‧Transformers
11‧‧‧第一端 11‧‧‧ first end
12‧‧‧第二端 12‧‧‧ second end
20‧‧‧穩壓電路 20‧‧‧ Voltage regulator circuit
21‧‧‧光耦合器 21‧‧‧Optocoupler
22‧‧‧穩壓管 22‧‧‧Regulator
15、23、30‧‧‧電容 15, 23, 30‧‧‧ capacitors
40‧‧‧補償電路 40‧‧‧Compensation circuit
13、41、42‧‧‧二極體 13, 41, 42‧ ‧ diodes
51、43‧‧‧開關 51, 43‧‧‧ switch
50‧‧‧控制器 50‧‧‧ Controller
60‧‧‧同步整流電路 60‧‧‧Synchronous rectifier circuit
14、R1、R2、R3、R4、Rp‧‧‧電阻 14, R1, R2, R3, R4, Rp‧‧‧ resistance
Vin‧‧‧電源 Vin‧‧‧ power supply
Vout‧‧‧輸出端 Vout‧‧‧ output
S1‧‧‧回授訊號 S1‧‧‧Reward signal
RL‧‧‧負載 R L ‧‧‧load
IL‧‧‧負載電流 I L ‧‧‧Load current
N1‧‧‧節點 N1‧‧‧ node
圖1為本發明第一實施例的電壓供應模組的示意圖。 1 is a schematic diagram of a voltage supply module according to a first embodiment of the present invention.
圖2為本發明第二實施例的電壓供應模組的示意圖。 2 is a schematic diagram of a voltage supply module according to a second embodiment of the present invention.
圖1為本發明第一實施例的電壓供應模組的示意圖。請參照圖1，電壓供應模組100包括有：變壓器10、穩壓電路20、電容30、補償電路40及控制電路(如PWM控制器50或/及開關51)。 1 is a schematic diagram of a voltage supply module according to a first embodiment of the present invention. Referring to FIG. 1 , the voltage supply module 100 includes a transformer 10 , a voltage stabilizing circuit 20 , a capacitor 30 , a compensation circuit 40 , and a control circuit (such as a PWM controller 50 or/and a switch 51 ).
變壓器10具有一次側和二次側。一次側具有二極體13、電阻14及電容15，一次側線圈的打點端接收直流電源Vin並另一端耦接二極體13的陽極端及開關51，電阻14及電容15的一端耦接直流電源Vin並另一端耦接二極體13的陰極端。二次側具有穩壓電路20、電容30及補償電路 40，變壓器10的二次側線圈具有第一端11及第二端12，第二端12為打點端，輸出端Vout設置於第一端11以輸出一輸出電壓，電容30的一端耦接輸出端Vout並另一端耦接至接地端。 The transformer 10 has a primary side and a secondary side. The primary side has a diode 13 , a resistor 14 and a capacitor 15 . The dot end of the primary side coil receives the DC power source Vin and the other end is coupled to the anode end of the diode 13 and the switch 51 . One end of the resistor 14 and the capacitor 15 are coupled to the DC. The power source Vin is coupled to the cathode end of the diode 13 at the other end. The secondary side has a voltage stabilizing circuit 20, a capacitor 30 and a compensation circuit 40, the secondary side coil of the transformer 10 has a first end 11 and a second end 12, the second end 12 is a striking end, the output end Vout is disposed at the first end 11 to output an output voltage, and one end of the capacitor 30 is coupled to the output. The terminal Vout is coupled to the ground at the other end.
穩壓電路20包括光耦合器21、穩壓管22、回饋電容23、電阻R1~R3及回饋電阻Rp。光耦合器21具有第一端、第二端及第三端，第一端透過電阻R3耦接輸出端Vout，第三端耦接控制電路，並第三端用以於光耦合器21導通時輸出回授訊號S1而控制開關51。穩壓管22具有陰極端、陽極端及參考端，陰極端耦接第二端，陽極端耦接至接地端。電阻R1具有第四端及第五端，第四端耦接輸出端Vout，第五端耦接參考端。電阻R2具有第六端及第七端，第六端耦接參考端，第七端耦接接地端。回饋電阻Rp的一端耦接陰極端。回饋電容23的一端耦接回饋電阻Rp的另一端，且另一端耦接參考端。 The voltage stabilizing circuit 20 includes a photocoupler 21, a Zener diode 22, a feedback capacitor 23, resistors R1 to R3, and a feedback resistor Rp. The optical coupler 21 has a first end, a second end, and a third end. The first end is coupled to the output end Vout through the resistor R3, the third end is coupled to the control circuit, and the third end is used when the optocoupler 21 is turned on. The feedback signal S1 is output and the switch 51 is controlled. The Zener tube 22 has a cathode end, an anode end and a reference end, the cathode end is coupled to the second end, and the anode end is coupled to the ground end. The resistor R1 has a fourth end and a fifth end, the fourth end is coupled to the output end Vout, and the fifth end is coupled to the reference end. The resistor R2 has a sixth end and a seventh end, the sixth end is coupled to the reference end, and the seventh end is coupled to the ground end. One end of the feedback resistor Rp is coupled to the cathode terminal. One end of the feedback capacitor 23 is coupled to the other end of the feedback resistor Rp, and the other end is coupled to the reference end.
補償電路40包括：二極體41、二極體42及電阻R4。二極體41的逆向端耦接於變壓器10的二次側與輸出端Vout不相同的一端。二極體42的逆向端耦接二極體41的逆向端並耦接至變壓器10二次側的第二端12，二極體42的順向端耦接至接地端。電阻R4具有第八端及第九端，第八端耦接穩壓管22的參考端，第九端耦接二極體41的順向端。 The compensation circuit 40 includes a diode 41, a diode 42 and a resistor R4. The reverse end of the diode 41 is coupled to an end of the transformer 10 that is different from the output end Vout. The reverse end of the diode 42 is coupled to the opposite end of the diode 41 and coupled to the second end 12 of the secondary side of the transformer 10. The forward end of the diode 42 is coupled to the ground. The resistor R4 has an eighth end and a ninth end. The eighth end is coupled to the reference end of the Zener tube 22, and the ninth end is coupled to the forward end of the diode 41.
在本發明的電壓供應模組100的應用上，當開關51根據回授訊號S1導通而使直流電源Vin施加在一次側線圈，並相應能量被儲存在一次側線圈中。於此期間，變壓器的第二端12的打點端為正且具有高位準，二極體41及二極體42皆不導通。當開關51斷開而截止磁化一次側線圈時，儲存在一次側線圈的能量被釋放到二次側線圈，並且產生二次側的感應電壓。此時，變壓器10打點端的極性會反轉，因 此變壓器的第二端12具有低電位，而二極體41及二極體42導通，此時，電阻R2與電阻R4並聯而形成補償電阻Rc(圖中未顯示)，且節點N1被控制在穩壓管22的參考端的參考電壓。在本發明的實施例中，穩壓管22是以TL431電晶體來實現，因此，節點N1的壓降大致上為TL431電晶體參考端的參考電壓Vref(約2.5伏特)。 In the application of the voltage supply module 100 of the present invention, when the switch 51 is turned on according to the feedback signal S1, the DC power source Vin is applied to the primary side coil, and the corresponding energy is stored in the primary side coil. During this period, the dot end of the second end 12 of the transformer is positive and has a high level, and both the diode 41 and the diode 42 are not turned on. When the switch 51 is turned off and the magnetization primary side coil is turned off, the energy stored in the primary side coil is released to the secondary side coil, and the induced voltage on the secondary side is generated. At this time, the polarity of the dot end of the transformer 10 will be reversed due to The second end 12 of the transformer has a low potential, and the diode 41 and the diode 42 are turned on. At this time, the resistor R2 is connected in parallel with the resistor R4 to form a compensation resistor Rc (not shown), and the node N1 is controlled at The reference voltage of the reference terminal of the Zener diode 22. In the embodiment of the present invention, the Zener diode 22 is implemented by a TL431 transistor. Therefore, the voltage drop of the node N1 is substantially the reference voltage Vref (about 2.5 volts) of the reference end of the TL431 transistor.
在一實施例中，當光耦合器21依據輸出電壓產生回授訊號S1並開關51相應回授訊號S1而斷開，藉由補償電路40中二極體41及二極體42順向導通，且電阻R2與電阻R4並聯而形成補償電阻Rc，並依據二極體42上的跨壓的大小及補償電阻Rc與電阻R1的比例而輸出補償電壓至輸出端Vout時，電壓供應模組100得以補償線路內阻所造成的線路損失。 In one embodiment, when the photocoupler 21 generates the feedback signal S1 according to the output voltage and the switch 51 is turned off corresponding to the feedback signal S1, the diode 41 and the diode 42 in the compensation circuit 40 are turned on. And the resistor R2 is connected in parallel with the resistor R4 to form the compensation resistor Rc, and the voltage supply module 100 is outputted according to the magnitude of the voltage across the diode 42 and the ratio of the compensation resistor Rc to the resistor R1 to output the compensation voltage to the output terminal Vout. Compensation for line losses caused by internal resistance of the line.
舉例而言，假設電壓供應模組100的輸出端Vout耦接負載RL，並且負載電流IL可表示為：
其中，VD2為二極體42上的跨壓的值，IS是二極體的飽和電流或界電流，VT為熱電壓，η被稱為二極體理想因子。電壓供應模組100的輸出端Vout輸出的補償電壓大致上可表示為：Vout=Vref(1+R1/Rc)-R1*VD1/R4+R1*VD2/R4...式(2)。 Where V D2 is the value of the voltage across the diode 42 , I S is the saturation current or the boundary current of the diode, V T is the thermal voltage, and η is called the diode ideal factor. The compensation voltage outputted by the output terminal Vout of the voltage supply module 100 can be roughly expressed as: Vout=Vref(1+R1/Rc)-R1*V D1 /R4+R1*V D2 /R4...(2) .
其中，VD1為二極體41上的跨壓的值。由於，線路損失與負載電流IL具有正相關(經公式P=I*V可知)。是以，經前述式(1)及式(2)可知，補償電壓與負載電流IL及二極體42上的跨壓的值VD2具有正相關，且補償電壓與補償電阻Rc具有負相關。藉此，電壓供應模組100的補償電壓得以補償線路損失。 Where V D1 is the value of the voltage across the diode 41. Since the line loss has a positive correlation with the load current I L (known by the formula P = I * V). Therefore, it can be seen from the above formulas (1) and (2) that the compensation voltage has a positive correlation with the load current I L and the value of the voltage across the diode 42 V D2 , and the compensation voltage has a negative correlation with the compensation resistor Rc. . Thereby, the compensation voltage of the voltage supply module 100 can compensate for the line loss.
圖2為本發明第二實施例的電壓供應模組的示意 圖。比對圖1及圖2可知，第一實施例與第二實施例大致相同，電壓供應模組200與電壓供應模組100不同之處在於，電壓供應模組200以開關43取代電壓供應模組100的二極體42。 2 is a schematic view of a voltage supply module according to a second embodiment of the present invention; Figure. 1 and FIG. 2, the first embodiment is substantially the same as the second embodiment. The voltage supply module 200 is different from the voltage supply module 100 in that the voltage supply module 200 replaces the voltage supply module with the switch 43. 100 diodes 42.
請參照圖2，本發明的電壓供應模組200以開關43耦接一同步整流電路60，藉以驅動同步整流電路60。在應用上，光耦合器21依據輸出電壓產生回授訊號S1，並開關51相應回授訊號S1而斷開，藉由補償電路40中二極體41順向導通且開關43導通，電阻R2與電阻R4並聯而形成補償電阻Rc，且依據開關43上的跨壓的大小及補償電阻Rc與電阻R1的比例而輸出補償電壓至輸出端Vout。由於，電壓供應模組200與電壓供應模組100的電路動作原理大致相同，在此不贅述。 Referring to FIG. 2 , the voltage supply module 200 of the present invention is coupled to a synchronous rectification circuit 60 by a switch 43 to drive the synchronous rectification circuit 60 . In application, the optocoupler 21 generates the feedback signal S1 according to the output voltage, and the switch 51 is turned off corresponding to the feedback signal S1. The diode 41 in the compensation circuit 40 is turned on and the switch 43 is turned on, and the resistor R2 is The resistor R4 is connected in parallel to form the compensation resistor Rc, and outputs a compensation voltage to the output terminal Vout according to the magnitude of the voltage across the switch 43 and the ratio of the compensation resistor Rc to the resistor R1. Since the circuit operation principle of the voltage supply module 200 and the voltage supply module 100 is substantially the same, it will not be described here.
此外，電壓供應模組100/200還得以因應負載的改變(即負載電流IL也隨之改變)，而輸出具有補償線路損失的補償電壓。舉例而言，由於重載狀態下的負載電流IL會大於輕載狀態下負載電流IL，且已知負載電流IL、補償電壓及二極體42上的跨壓的值VD2三者具有正相關，因此，於重載狀態下二極體42上的跨壓的值會大於輕載狀態下二極體42上的跨壓的值。再者，於重載狀態下開關43的跨壓的值也會大於輕載狀態下第二開關43上的跨壓的值。是以，在重載狀態下補償電壓的值也會大於輕載狀態下補償電壓的值。 In addition, the voltage supply module 100/200 is also capable of outputting a compensation voltage having a compensated line loss in response to a change in load (ie, the load current I L also changes). For example, the load current I L is greater than the overload status under the light load state of the load current I L, and the load current I L is known, the compensation voltage and cross voltage value V D2 on three diode 42 There is a positive correlation, therefore, the value of the voltage across the diode 42 in the heavy load state will be greater than the value of the voltage across the diode 42 in the light load state. Furthermore, the value of the voltage across the switch 43 in the heavy load state is also greater than the value of the voltage across the second switch 43 in the light load state. Therefore, the value of the compensation voltage in the heavy load state is also greater than the value of the compensation voltage in the light load state.
在一些實施例中，可藉由提升電阻R1與補償電阻Rc的比值而提升補償電壓。例如，可以調整電阻R2或/及電阻R4而降低補償電阻Rc的電阻值，或者提升電阻R1的電阻值。由於提升電阻R1與補償電阻Rc的比值而提升補償電壓能藉許多方式實現，且應為本技術領域中具有通常知識者所熟悉，在此不贅述。 In some embodiments, the compensation voltage can be boosted by increasing the ratio of the resistor R1 to the compensation resistor Rc. For example, the resistor R2 or / and the resistor R4 can be adjusted to lower the resistance value of the compensation resistor Rc or to increase the resistance value of the resistor R1. Increasing the compensation voltage due to the ratio of the boosting resistor R1 to the compensating resistor Rc can be implemented in a number of ways and should be familiar to those of ordinary skill in the art and will not be described herein.
此外，穩壓電路20對輸出端Vout的電壓進行採樣以產生回授訊號S1，以致於當輸出端Vout的電壓下降時，開關51根據回授訊號S1導通而使直流電源Vin施加在一次側線圈。其中，回授訊號S1是依據電阻R1、電阻R2、電阻Rp及電容23產生。 In addition, the voltage stabilizing circuit 20 samples the voltage of the output terminal Vout to generate the feedback signal S1, so that when the voltage of the output terminal Vout drops, the switch 51 turns on the DC power supply Vin according to the feedback signal S1. . The feedback signal S1 is generated according to the resistor R1, the resistor R2, the resistor Rp, and the capacitor 23.
本發明的電壓供應模組於一次側的開關斷開後，利用二次側的補償電路中存在的電壓值(即圖1中二極體42上的跨壓的值VD2，或圖2中開關43上的跨壓的值)以及藉由並聯形成補償電阻而得以與電阻(R1)產生較高的比例，以致使所輸出的補償電壓與二次側電路迴路的負載電流及所述的電壓值具有正相關，且補償電壓與補償電阻具有負相關，如此一來，就能在輸出補償電壓的同時補償線路壓降的損耗，進而維持輸出電壓的穩定度。 The voltage supply module of the present invention utilizes the voltage value existing in the compensation circuit of the secondary side after the switch on the primary side is turned off (ie, the value of the voltage across the diode 42 in FIG. 1 V D2 , or in FIG. 2 The value of the voltage across the switch 43) and the formation of the compensation resistor in parallel to generate a higher ratio with the resistor (R1), so that the output of the compensation voltage and the load current of the secondary circuit and the voltage The value has a positive correlation, and the compensation voltage has a negative correlation with the compensation resistor. In this way, the line voltage drop loss can be compensated while outputting the compensation voltage, thereby maintaining the stability of the output voltage.
雖然本發明已以較佳實施例揭露如上，然其並非用以限定本發明，任何熟習此技藝者，在不脫離本發明之精神和範圍內，當可作些許之更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。 While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.
100‧‧‧電壓供應模組 100‧‧‧Voltage supply module
10‧‧‧變壓器 10‧‧‧Transformers
11‧‧‧第一端 11‧‧‧ first end
12‧‧‧第二端 12‧‧‧ second end
20‧‧‧穩壓電路 20‧‧‧ Voltage regulator circuit
21‧‧‧光耦合器 21‧‧‧Optocoupler
22‧‧‧穩壓管 22‧‧‧Regulator
15、23、30‧‧‧電容 15, 23, 30‧‧‧ capacitors
40‧‧‧補償電路 40‧‧‧Compensation circuit
13、41、42‧‧‧二極體 13, 41, 42‧ ‧ diodes
50‧‧‧控制器 50‧‧‧ Controller
51‧‧‧開關 51‧‧‧ switch
14、R1、R2、R3、R4、Rp‧‧‧電阻 14, R1, R2, R3, R4, Rp‧‧‧ resistance
Vin‧‧‧電源 Vin‧‧‧ power supply
Vout‧‧‧輸出端 Vout‧‧‧ output
S1‧‧‧回授訊號 S1‧‧‧Reward signal
RL‧‧‧負載 R L ‧‧‧load
IL‧‧‧負載電流 I L ‧‧‧Load current
N1‧‧‧節點 N1‧‧‧ node
Claims (6)
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| TW105103348A TWI575856B (en) | 2016-02-02 | 2016-02-02 | Power supply module |
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| TW105103348A TWI575856B (en) | 2016-02-02 | 2016-02-02 | Power supply module |
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| TWI575856B true TWI575856B (en) | 2017-03-21 |
| TW201729523A TW201729523A (en) | 2017-08-16 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100039836A1 (en) * | 2008-08-15 | 2010-02-18 | Xiaowu Gong | Novel Utilization of a Multifunctional Pin to Control a Switched-Mode Power Converter |
| CN1574580B (en) * | 2003-06-18 | 2010-04-28 | 台达电子工业股份有限公司 | Multiple output converter with improved cross regulation and method thereof |
| CN101154824B (en) * | 2006-09-29 | 2010-09-01 | 亚源科技股份有限公司 | Charger circuit with output voltage compensation |
| US20110018609A1 (en) * | 2009-07-22 | 2011-01-27 | Richpower Microelectronics Corporation | Temperature compensation in output feedback of a flyback power converter |
| TWI387194B (en) * | 2009-08-14 | 2013-02-21 | Richpower Microelectronics | Apparatus and method for standby power saving of a flyback power converter |
| TWI504113B (en) * | 2012-11-14 | 2015-10-11 | Lite On Technology Corp | Fly-back power converter and electronic apparatus |
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- 2016-02-02 TW TW105103348A patent/TWI575856B/en active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1574580B (en) * | 2003-06-18 | 2010-04-28 | 台达电子工业股份有限公司 | Multiple output converter with improved cross regulation and method thereof |
| CN101154824B (en) * | 2006-09-29 | 2010-09-01 | 亚源科技股份有限公司 | Charger circuit with output voltage compensation |
| US20100039836A1 (en) * | 2008-08-15 | 2010-02-18 | Xiaowu Gong | Novel Utilization of a Multifunctional Pin to Control a Switched-Mode Power Converter |
| US20110018609A1 (en) * | 2009-07-22 | 2011-01-27 | Richpower Microelectronics Corporation | Temperature compensation in output feedback of a flyback power converter |
| TWI387194B (en) * | 2009-08-14 | 2013-02-21 | Richpower Microelectronics | Apparatus and method for standby power saving of a flyback power converter |
| TWI504113B (en) * | 2012-11-14 | 2015-10-11 | Lite On Technology Corp | Fly-back power converter and electronic apparatus |
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