KR20000025208A - Voltage stabilization control circuit of direct current power apparatus - Google Patents

Voltage stabilization control circuit of direct current power apparatus Download PDF

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Publication number
KR20000025208A
KR20000025208A KR1019980042195A KR19980042195A KR20000025208A KR 20000025208 A KR20000025208 A KR 20000025208A KR 1019980042195 A KR1019980042195 A KR 1019980042195A KR 19980042195 A KR19980042195 A KR 19980042195A KR 20000025208 A KR20000025208 A KR 20000025208A
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South Korea
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voltage
output
stabilization control
power supply
control circuit
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KR1019980042195A
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Korean (ko)
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KR100556723B1 (en
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전범진
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구자홍
엘지전자 주식회사
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

PURPOSE: A voltage stabilization control circuit of a direct current power apparatus is provided to output a stable voltage in a case where one output voltage is affected by a variation of the other output voltage. CONSTITUTION: A voltage stabilization control circuit of a direct current power apparatus comprises first and second voltage division resistors(R1,R2), a sense condenser(Cs) and a comparator(41). The first and second voltage division resistors(R1,R2) senses a variation of an output voltage(Vo), and the sense condenser(Cs) interrupts a direct current. The sense condenser(Cs) reflects a variation of an input alternating current voltage(Vin) to a sense voltage(Vs) by the first and second voltage division resistors(R1,R2). The comparator(41) compares a voltage obtained by the resistors(R1,R2) and the condenser(Cs) with a reference voltage(Vref) to perform a voltage stabilization control by use of a control output signal(Vc).

Description

직류전원장치의 전원 안정화 제어회로Power stabilization control circuit of DC power supply

본 발명은 휴대용 제품에 사용되는 직류전원장치의 전원 안정화 제어회로에 관한 것으로서 특히 축전지로부터 부하에 공급되는 출력전압은 물론 입력전압의 변동을 감지하여 전압제어에 연동시킴으로써 전원안정화 제어성능을 향상시킬 수 있도록 한 직류전원장치의 전원 안정화 제어회로에 관한 것이다.The present invention relates to a power stabilization control circuit of a DC power supply device used in a portable product, in particular, it can improve the power stabilization control performance by detecting the output voltage supplied from the storage battery as well as the change of the input voltage and interlock with the voltage control. It relates to a power stabilization control circuit of a DC power supply device.

종래에 셀룰러폰이나 PCS, PDA, HHP, 노트북 컴퓨터 등의 휴대용 제품에는 대부분 축전지로서 리튬이온 축전지를 사용하고 있다.Conventionally, portable products such as cellular phones, PCS, PDAs, HHPs, notebook computers, etc., mostly use lithium ion batteries as storage batteries.

리튬이온 축전지는 가볍고 대용량이라는 특징과 장점을 가지고 있으나 내부저항이 수백mΩ으로 크다는 단점이 있다.Lithium-ion batteries have the features and advantages of light weight and large capacity, but have the disadvantage that their internal resistance is large, several hundred mΩ.

이와같이 리튬이온 축전지는 그 내부저항이 크기 때문에 대전류 방전을 하게 되는 경우 큰 전압강하가 발생하고, 이러한 입력전압의 급격한 변화가 출력전압에 영향을 미쳐서 전원 안정화 제어의 성능을 저하시키게 된다.As described above, the lithium ion battery has a large internal resistance, and thus a large voltage drop occurs when a large current discharge occurs, and a sudden change in the input voltage affects the output voltage, thereby degrading power stabilization control performance.

도1은 종래의 PCS단말기에서 전원을 공급하는 회로의 구성을 나타낸 도면으로서 리튬이온 축전지(E)로부터 PCS주회로(101)에 3.6V전원을 공급하기 위한 3.6V컨버터(102) 및 5V전원을 공급하기 위한 5V컨버터(103)를 이용해서 2전원을 공급하고 있다.FIG. 1 is a diagram showing the configuration of a circuit for supplying power in a conventional PCS terminal. FIG. 1 shows a 3.6V converter 102 and a 5V power supply for supplying 3.6V power to a PCS main circuit 101 from a lithium ion battery E. FIG. Two power supplies are supplied using the 5V converter 103 for supplying.

이와같이 단일 전원이 아닌 경우에 한쪽의 부하 변동이 축전지 입력전압의 변동을 일으켜서 다른쪽에 영향을 미치게 된다.Thus, in the case of not a single power supply, the load variation of one side causes the variation of the battery input voltage and affects the other side.

도2는 이 것을 보여주고 있다.2 shows this.

즉, PCS의 5V전원의 부하는 800mA의 전류가 순간적으로 온/오프 하기 때문에 축전지(E)의 출력전압을 맥동하게 만들고, 이 것은 축전지(E)로부터 3.6V컨버터(103)에 입력되는 전압의 변동을 초래하여 3.6V 출력전압도 함께 맥동하게 되어 불안정한 전원이 PCS주회로(101)에 공급되는 결과를 초래한다.That is, the load of the 5 V power supply of the PCS causes the output voltage of the battery E to pulsate because the current of 800 mA is temporarily turned on / off, which is the voltage input from the battery E to the 3.6 V converter 103. It causes fluctuations, causing the 3.6V output voltage to pulsate with it, resulting in unstable power being supplied to the PCS main circuit 101.

즉, 5V컨버터(102)측에 부하가 인가되면 축전지(E)의 방전전류도 따라서 증가하게 되어 축전지(E)전압이 내부저항에 의해서 감소하게 되고 이 것은 3.6V컨버터(103)에 영향을 미치게 되어 3.6V출력전압도 따라서 감소하게 된다.That is, when a load is applied to the 5V converter 102 side, the discharge current of the battery E also increases accordingly, and the voltage of the battery E decreases due to the internal resistance, which affects the 3.6V converter 103. The 3.6V output voltage is also reduced accordingly.

3.6V컨버터(103)의 전압제어기는 이러한 출력전압의 감소를 감지하여 다시 제어기준전압으로 제어하게 되고, 이후 다시 5V의 부하가 제거되면 축전지(E)의 전압도 회복되고 이러한 축전지(E)의 전압증가는 다시 3.6V출력전압의 상승을 가져온다.The voltage controller of the 3.6V converter 103 detects such a decrease in the output voltage and again controls the control reference voltage. Then, when the load of 5V is removed again, the voltage of the battery E is also restored and the voltage of the battery E Increasing the voltage again raises the 3.6V output voltage.

이와같은 3.6V 출력전압의 변동은 5V출력전압 변동과 축전지(E)의 내부저항에 의한 입력전압의 변동이 그 원인이겠지만 이러한 입력전압의 변동을 전압제어기가 속응하여 제어하지 못한다는 점에도 기인한다.The change in the 3.6V output voltage may be caused by the 5V output voltage change and the change in the input voltage due to the internal resistance of the battery E. However, the change in the input voltage may not be controlled by the voltage controller. .

도3은 상기한 PCS단말기의 전원 안정화 제어를 위해서 사용되는 전압제어기의 구성을 나타내고 있다.3 shows the configuration of the voltage controller used for power stabilization control of the PCS terminal.

3.6V출력전압(Vo)을 저항(R1,R2)으로 분압하여 감지전압(Vs)을 얻고, 이 감지전압(Vs)을 기준전압(Vref)과 비교기(301)에서 비교하여 전압변동 즉, 전압오차(Verr)가 있을 경우 전압오차(Verr)를 감소시키는 방향으로 제어출력(Vc)을 내서 3.6V컨버터(103)를 안정화 시키는 기술이다.The 3.6V output voltage Vo is divided by the resistors R1 and R2 to obtain the sensing voltage Vs. The sensing voltage Vs is compared with the reference voltage Vref at the comparator 301 to change the voltage. If there is an error (Verr), the control output (Vc) in the direction to reduce the voltage error (Verr) is a technique for stabilizing the 3.6V converter 103.

즉, 외부영향으로 인하여 출력전압(Vo)이 감소하면 감지전압(Vs)도 따라서 감소하게 되고 이 감지전압(Vs)과 기준전압(Vref)의 차(Verr)는 음(-)의 값을 가지게 되며, 이 전압오차(Verr)가 음(-)이 되면 제어출력(Vc)이 증가하여 3.6V컨버터의 출력전압(Vo)을 다시 증가시키는 것이다.That is, when the output voltage Vo decreases due to external influence, the sensing voltage Vs decreases accordingly, and the difference Verr between the sensing voltage Vs and the reference voltage Vref has a negative value. If the voltage error Verr becomes negative, the control output Vc increases to increase the output voltage Vo of the 3.6V converter.

물론 여기서 출력전압(Vo)의 변동이 감지되지 않는 이상 전압제어기는 제어조치를 취하지 않기 때문에 결국 종래에는 출력전압의 변동이 일어난 후에 전원 안정화 제어가 이루어져서 속응성이 떨어지고 전원 안정화 제어성능 또한 떨어지게 되었다.Of course, since the voltage controller does not take a control action unless a change in the output voltage Vo is sensed, in the end, power stabilization control is performed after the change of the output voltage in the related art, resulting in poor response and power stabilization control performance.

본 발명은 리튬이온 축전지를 사용하는 직류전원 공급장치에서 특히 전원이 2가지 이상이고 한쪽 전원의 출력변동이 축전지 전압변동을 나타나 다른쪽 출력전압에 영향을 주는 경우에 보다 안정된 출력을 내는 직류전원장치의 전원 안정화 제어회로를 제공한다.In the present invention, a DC power supply using a lithium-ion battery, the DC power supply for a more stable output, especially when the power supply is two or more and the output change of one of the power supply to the battery voltage fluctuations affect the other output voltage Provides a power stabilization control circuit.

본 발명은 특히 리튬이온 축전지를 사용하는 휴대용 2전원 기기에서 출력전압의 변동은 물론, 입력전압의 변동을 감지하여 입력전압 변동을 제어출력과 연동시킴으로써 입력전압 변동에 특히 강한 전원 안정화 제어를 수행할 수 있도록 한 직류전원장치의 전원 안정화 제어회로를 제공한다.In particular, the present invention detects a change in the output voltage as well as a change in the input voltage in a portable two power supply device using a lithium ion battery, and performs power stabilization control particularly strong against the input voltage change by interlocking the input voltage change with the control output. Provide the power stabilization control circuit of the DC power supply.

도1은 PCS단말기의 전원공급회로의 블럭 구성도1 is a block diagram of a power supply circuit of a PCS terminal

도2는 PCS단말기의 전원공급회로의 전원전압 파형도2 is a power supply voltage waveform diagram of a power supply circuit of a PCS terminal;

도3은 종래의 전원 안정화 제어회로의 회로도3 is a circuit diagram of a conventional power supply stabilization control circuit.

도4는 본 발명의 직류전원장치의 전원 안정화 제어회로의 회로도4 is a circuit diagram of a power stabilization control circuit of the DC power supply apparatus of the present invention.

도4는 본 발명의 직류전원장치의 전원 안정화 제어회로의 구성을 나타낸 도면으로서, 출력전압(Vo)의 변동을 감지하기 위한 분압저항(R1,R2)과, DC를 차단하고 AC로서 입력전압(Vin)의 변동분을 상기 분압저항(R1,R2)에 의한 감지전압(Vs)에 반영하기 위한 감지 콘덴서(Cs)와, 상기 저항 및 감지 콘덴서에 의해서 감지된 출력전압 및 입력전압 변동분을 기준전압(Vref)과 비교하여 제어출력(Vc)으로 전원 안정화 제어를 수행하는 비교기(41)를 포함하여 구성되며, C0는 콘덴서 이다.4 is a diagram showing the configuration of a power supply stabilization control circuit of the DC power supply device according to the present invention, in which the divided voltage resistors R1 and R2 for detecting a change in the output voltage Vo and a DC are cut off and the input voltage (AC) is AC. The sensing capacitor Cs for reflecting the variation of Vin in the sensing voltage Vs by the voltage dividing resistors R1 and R2, and the output voltage and the input voltage variation sensed by the resistance and the sensing capacitor are referred to as reference voltages. It includes a comparator 41 for performing the power supply stabilization control to the control output (Vc) compared to Vref), C0 is a capacitor.

이와같이 구성된 본 발명의 직류전원장치의 전원 안정화 제어회로 동작을 설명하면 다음과 같다.Referring to the operation of the power stabilization control circuit of the DC power supply device configured as described above is as follows.

도2와 같이 5V컨버터 전원과 3.6V컨버터 전원의 2전원을 공급하는 회로에 적용한 경우 특히 5V출력전압 변동에 따른 3.6V출력전압의 맥동을 다음과 같이 안정화 제어한다.When applied to a circuit for supplying two power sources, a 5V converter power supply and a 3.6V converter power supply as shown in FIG. 2, in particular, the pulsation of the 3.6V output voltage according to the 5V output voltage variation is stabilized as follows.

먼저, 출력전압(Vo)과 입력전압(Vin)이 정상상태에 있을 경우에 감지 콘덴서(Cs)에 충전된 전압(Vis)은, Vis = Vin - Vs 의 전압이 충전되어 있다.First, when the output voltage Vo and the input voltage Vin are in a normal state, the voltage Vis charged in the sensing capacitor Cs is charged with a voltage of Vis = Vin-Vs.

이 상태에서 입력전압(Vin)의 변화가 없으면(안정화 상태) 출력전압(Vo)만이 저항(R1,R2)으로 분압된 감지전압(Vs)에 반영되어 감지전압(Vs)과 기준전압(Vref)의 차(Verr)만큼 비교기(401)가 제어출력(Vc)을 내서 출력전압(Vo)의 변동을 억제하는 전압 안정화 제어를 수행하게 된다.In this state, if there is no change in the input voltage Vin (stabilization state), only the output voltage Vo is reflected in the sensed voltage Vs divided by the resistors R1 and R2, thereby detecting the sensed voltage Vs and the reference voltage Vref. The comparator 401 outputs the control output Vc by the difference Verr to perform the voltage stabilization control to suppress the fluctuation of the output voltage Vo.

그러다가 외부요인에 의해(즉, 5V컨버터의 전압맥동 등) 입력전압(Vin)이 갑자기 줄어들면 방전경로를 확보하지 못하고 있는 감지콘덴서(Cs)는 콘덴서 특성상 그 충전전압(Vis)이 갑자기 줄어들지 못하고 입력전압(Vin)의 감소가 바로 감지전압(Vs)의 감소로 반영된다.Then, if the input voltage Vin suddenly decreases due to external factors (ie, voltage pulsation of the 5V converter), the sensing capacitor Cs, which cannot secure the discharge path, does not suddenly decrease its charging voltage Vis due to the characteristics of the capacitor. The decrease in the voltage Vin is directly reflected by the decrease in the sensing voltage Vs.

즉, 입력전압(Vin)의 감소를 바로 감지전압(Vs)으로서 비교기(401)에 입력하게 되므로 비교기(401)는 입력전압(Vin)의 감소에 대응하는 제어를 즉각 수행할 수 있게 된다.That is, since the reduction of the input voltage Vin is directly input to the comparator 401 as the sensing voltage Vs, the comparator 401 can immediately perform a control corresponding to the reduction of the input voltage Vin.

그러므로, 본 발명에서는 출력전압(Vo)이 줄어들기 전에 먼저 입력전압(Vin)의 변화를 감지하여 출력을 증가시키게 되므로 종래에 출력전압(Vo)이 이미 변한 다음에 이 것을 감지하여 제어를 시작하는 경우보다 속응성이 뛰어나고 출력전압 맥동을 현저하게 줄여줄 수 있게되는 것이다.Therefore, in the present invention, since the output voltage is first detected before the output voltage Vo decreases, the output is increased. Therefore, the output voltage Vo is already changed before the output voltage Vo is changed. It is faster than the case and can significantly reduce the output voltage pulsation.

한편, 감지 콘덴서(Cs)의 용량값의 선정은 전압 제어기의 특성에 따라 달라지는데, 일반적으로 감지 콘덴서(Cs)의 용량값이 클수록 입력전압(Vin)의 변동이 제어기에 영향을 주는 시간이 길어지고, 감지 콘덴서(Cs)의 용량값이 작을수록 입력전압(Vin)의 변동이 제어기에 영향을 주는 시간이 짧아지게 된다.On the other hand, the selection of the capacitance value of the sensing capacitor (Cs) depends on the characteristics of the voltage controller. In general, the larger the capacitance value of the sensing capacitor (Cs), the longer the time the variation of the input voltage (Vin) affects the controller. The smaller the capacitance value of the sensing capacitor Cs is, the shorter the time the variation of the input voltage Vin affects the controller is.

그러므로 본 발명에서는 전압 제어기의 제어성능이 우수하여 출력전압을 빨리 제어하는 경우에는 작은 용량값의 감지 콘덴서(Cs)를 사용하면 적절하고, 반대로 느린 경우에는 큰 용량값의 감지 콘덴서(Cs)를 사용하면 적절할 것이다.Therefore, in the present invention, it is appropriate to use a small capacitance sensing capacitor Cs in the case of controlling the output voltage quickly because of excellent control performance of the voltage controller. Would be appropriate.

본 발명은 내부 저항이 큰 리튬이온 축전지를 사용하는 휴대용기기에서 2가지 이상의 전원이 존재할 때 한쪽 전원의 출력변동이 다른쪽 전원에 영향을 주는 것을 방지할 수 있고, 따라서 전원변화에 대한 안정화 제어의 성능을 높일 수 있다.The present invention can prevent the output fluctuation of one power source from affecting the other power source when two or more power sources are present in a portable device using a lithium ion battery having a large internal resistance. It can improve performance.

Claims (1)

축전지(E)로부터 전원제어회로를 통해서 부하측에 직류안정화 전원을 공급하는 회로에 있어서,In a circuit for supplying a DC stabilized power supply to a load side from a storage battery (E) through a power supply control circuit, 출력전압(Vo)의 변동을 감지하기 위한 분압저항(R1,R2)과, DC를 차단하고 AC로서 입력전압(Vin)의 변동분을 상기 분압저항(R1,R2)에 의한 감지전압(Vs)에 반영하기 위한 감지 콘덴서(Cs)와, 상기 저항 및 감지 콘덴서에 의해서 감지된 출력전압 및 입력전압 변동분을 기준전압(Vref)과 비교하여 제어출력(Vc)으로 전원 안정화 제어를 수행하는 비교기(41)를 포함하여 구성된 것을 특징으로 하는 직류전원장치의 전원 안정화 제어회로.The divided voltage resistors R1 and R2 for detecting the fluctuation of the output voltage Vo and the DC cut-off and the change of the input voltage Vin as AC are applied to the detected voltage Vs by the divided resistors R1 and R2. Comparator 41 for performing a power supply stabilization control with a control output (Vc) by comparing a sensing capacitor (Cs) to reflect, and the output voltage and the input voltage variation detected by the resistor and the sensing capacitor with a reference voltage (Vref). Power stabilization control circuit of the DC power supply, characterized in that configured to include.
KR1019980042195A 1998-10-09 1998-10-09 Power Stabilization Control Circuit of DC Power Supply KR100556723B1 (en)

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WO2014093326A2 (en) * 2012-12-14 2014-06-19 Intel Corporation Method and apparatus for managing computing system power

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JPS59170915A (en) * 1983-03-18 1984-09-27 Nec Corp Reducing circuit of ripple voltage
JPS62230355A (en) * 1986-03-31 1987-10-09 Ricoh Co Ltd Multi-output switching regulator
JPS63133069A (en) * 1986-11-25 1988-06-04 Matsushita Electric Ind Co Ltd Apparatus for measuring dc difference voltage

Cited By (5)

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Publication number Priority date Publication date Assignee Title
WO2014093326A2 (en) * 2012-12-14 2014-06-19 Intel Corporation Method and apparatus for managing computing system power
WO2014093326A3 (en) * 2012-12-14 2014-12-04 Intel Corporation Method and apparatus for managing computing system power
GB2523279A (en) * 2012-12-14 2015-08-19 Intel Corp Method and apparatus for managing computing system power
US9541991B2 (en) 2012-12-14 2017-01-10 Intel Corporation Method and apparatus for managing computing system power
GB2523279B (en) * 2012-12-14 2020-12-30 Intel Corp Method and apparatus for managing computing system power

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