TWI480555B - Voltage detecting circuit - Google Patents
Voltage detecting circuit Download PDFInfo
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- TWI480555B TWI480555B TW099142722A TW99142722A TWI480555B TW I480555 B TWI480555 B TW I480555B TW 099142722 A TW099142722 A TW 099142722A TW 99142722 A TW99142722 A TW 99142722A TW I480555 B TWI480555 B TW I480555B
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Description
本發明係關於一種電壓檢測電路。 The present invention relates to a voltage detecting circuit.
很多時候，當電源(電池或者其他形式的各種電源)沒電時或者提供的電壓不夠時，可能就會影響到整個電路的性能。例如，如果主機板上的電池沒電了就會導致電腦系統不開機。 Many times, when the power supply (battery or other forms of various power supplies) is out of power or the supplied voltage is insufficient, it may affect the performance of the entire circuit. For example, if the battery on the motherboard is dead, the computer system will not turn on.
鑒於上述內容，有必要提供一種電壓檢測電路，以檢測電路中的電源電壓是否滿足要求。 In view of the above, it is necessary to provide a voltage detecting circuit to detect whether the power supply voltage in the circuit satisfies the requirements.
一種電壓檢測電路，用於對一電壓源進行電壓檢測，該電壓檢測電路包括一穩壓管、一矽控整流器、一第一發光二極體、一第二發光二極體、一第一電阻及一第二電阻，該穩壓管的陰極連接至該電壓源，該穩壓管的陽極透過該第一電阻連接至該矽控整流器的控制端，該矽控整流器的陽極連接至該第一發光二極體的陽極，還透過該第二電阻連接至該電壓源，該矽控整流器的陰極連接至該第一發光二極體的陰極及該第二發光二極體的陽極，該第二發光二極體的陰極接地。 A voltage detecting circuit for performing voltage detection on a voltage source, the voltage detecting circuit comprising a voltage stabilizing tube, a voltage controlled rectifier, a first light emitting diode, a second light emitting diode, and a first resistor And a second resistor, the cathode of the Zener diode is connected to the voltage source, the anode of the Zener diode is connected to the control terminal of the PWM rectifier through the first resistor, and the anode of the PWM rectifier is connected to the first An anode of the light emitting diode is further connected to the voltage source through the second resistor, a cathode of the controlled rectifier is connected to a cathode of the first light emitting diode and an anode of the second light emitting diode, the second The cathode of the light emitting diode is grounded.
上述電壓檢測電路透過對該穩壓管、第一及第二發光二極體的穩壓電壓及導通電壓進行適當的設定，即可判斷出該電壓源的電壓在哪一範圍內，進而判斷出該電壓源是否滿足要求，簡單易行， 且成本低。 The voltage detecting circuit can appropriately determine the voltage of the voltage source by appropriately setting the voltage regulator voltage and the turn-on voltage of the Zener diode, the first and second LEDs, and further determine the voltage of the voltage source. Whether the voltage source meets the requirements is simple and easy. And the cost is low.
100‧‧‧電壓檢測電路 100‧‧‧Voltage detection circuit
Vin‧‧‧電壓源 Vin‧‧‧voltage source
VD‧‧‧穩壓管 VD‧‧‧ voltage regulator
SCR‧‧‧矽控整流器 SCR‧‧‧controlled rectifier
LED1‧‧‧第一發光二極體 LED1‧‧‧first light-emitting diode
LED2‧‧‧第二發光二極體 LED2‧‧‧Second light-emitting diode
R1、R2‧‧‧電阻 R1, R2‧‧‧ resistance
圖1係本發明電壓檢測電路較佳實施方式的電路圖。 1 is a circuit diagram of a preferred embodiment of a voltage detecting circuit of the present invention.
請參考圖1，本發明電壓檢測電路100用於對一電子設備的電壓源Vin進行電壓檢測，例如對主機板上的電池電壓源進行檢測，該電壓檢測電路100的較佳實施方式包括一穩壓管VD、一矽控整流器SCR、一第一發光二極體LED1、一第二發光二極體LED2及兩電阻R1、R2。 Referring to FIG. 1, the voltage detecting circuit 100 of the present invention is configured to perform voltage detection on a voltage source Vin of an electronic device, for example, detecting a battery voltage source on a motherboard. The preferred embodiment of the voltage detecting circuit 100 includes a stable The pressure tube VD, a voltage controlled rectifier SCR, a first light emitting diode LED 1, a second light emitting diode LED 2 and two resistors R1, R2.
該穩壓管VD的陰極連接至該電壓源Vin，該穩壓管VD的陽極透過電阻R1連接至該矽控整流器SCR的控制端，該矽控整流器SCR的陽極連接至該第一發光二極體LED1的陽極，還透過電阻R2連接至該電壓源Vin，該矽控整流器SCR的陰極連接至該第一發光二極體LED1的陰極及該第二發光二極體LED2的陽極，該第二發光二極體LED2的陰極接地。本實施方式中，該第一發光二極體LED1及第二發光二極體LED2分別為兩種不同顏色的發光二極體，導通電壓分別為V1及V2。該穩壓管VD的穩壓電壓為VD。 The cathode of the Zener diode VD is connected to the voltage source Vin, and the anode of the Zener diode VD is connected to the control terminal of the PWM rectifier SCR through a resistor R1, and the anode of the PWM rectifier SCR is connected to the first LED The anode of the body LED1 is also connected to the voltage source Vin through a resistor R2. The cathode of the step-controlled rectifier SCR is connected to the cathode of the first LED body 1 and the anode of the second LED 2, the second The cathode of the LED 2 is grounded. In the embodiment, the first LEDs and the second LEDs 2 are two LEDs of different colors, and the on-voltages are V1 and V2, respectively. The voltage regulator voltage of the Zener diode VD is VD.
工作時，當該電壓源Vin的電壓Vin高於穩壓管VD的穩壓電壓VD時，此時Vin>VD，該電壓源Vin的電壓Vin經電阻R1觸發矽控整流器SCR導通，矽控整流器SCR導通後，該電壓源Vin的電壓Vin經電阻R2和第二發光二極體LED2，從而使第二發光二極體導通LED2導通而發光，而此時第一發光二極體LED1不發光。此時，表明該電壓源Vin的電壓Vin高於所需的電源電壓範圍。 During operation, when the voltage Vin of the voltage source Vin is higher than the voltage regulation voltage VD of the voltage regulator VD, at this time, Vin>VD, the voltage Vin of the voltage source Vin is triggered by the resistor R1 to turn on the rectifier rectifier SCR, and the rectifier is controlled. After the SCR is turned on, the voltage Vin of the voltage source Vin passes through the resistor R2 and the second LED diode 2, so that the second LED is turned on and the LED 2 is turned on to emit light, and at this time, the first LED LED1 does not emit light. At this time, it is indicated that the voltage Vin of the voltage source Vin is higher than the required power supply voltage range.
當電壓源Vin的電壓Vin低於穩壓管VD的穩壓電壓VD時，此時 V1+V2<Vin<VD，電壓源Vin的電壓Vin無法經電阻R1觸發矽控整流器SCR，矽控整流器SCR截止，電壓源Vin的電壓Vin經電阻R2後流過第一發光二極體LED1和第二發光二極體LED2，從而使第一發光二極體LED1和第二發光二極體LED2導通而發光。此時，表明該電壓源Vin的電壓Vin符合所需的電源電壓範圍。 When the voltage Vin of the voltage source Vin is lower than the regulated voltage VD of the Zener diode VD, at this time V1+V2<Vin<VD, the voltage Vin of the voltage source Vin cannot trigger the voltage controlled rectifier SCR via the resistor R1, and the voltage controlled voltage of the voltage source Vin flows through the first light emitting diode LED1 through the resistor R2. The second light-emitting diode LED 2 is such that the first light-emitting diode LED 1 and the second light-emitting diode LED 2 are turned on to emit light. At this time, it is indicated that the voltage Vin of the voltage source Vin meets the required power supply voltage range.
當電壓源Vin的電壓Vin繼續降低，即V1<Vin<V1+V2時，電壓源Vin的電壓Vin只能保證第一發光二極體LED1發光。此時，表明該電壓源Vin的電壓Vin小於所需的電源電壓範圍，但能勉強使電子設備進行工作。 When the voltage Vin of the voltage source Vin continues to decrease, that is, V1 < Vin < V1 + V2, the voltage Vin of the voltage source Vin can only ensure that the first LED LED 1 emits light. At this time, it is indicated that the voltage Vin of the voltage source Vin is smaller than the required power supply voltage range, but the electronic device can be barely operated.
當Vin<V1時，第一發光二極體LED1和第二發光二極體LED2都不發光。此時，表明該電壓源Vin的電壓Vin小於所需的電源電壓範圍，且完全不能使電子設備進行工作。 When Vin < V1, neither the first light-emitting diode LED 1 nor the second light-emitting diode LED 2 emit light. At this time, it is indicated that the voltage Vin of the voltage source Vin is smaller than the required power supply voltage range, and the electronic device cannot be operated at all.
上述第一發光二極體LED1及第二發光二極體LED2的導通電壓V1及V2、穩壓管VD的穩壓電壓為VD均可根據需要進行相應的設定，以驗證電壓源Vin的電壓Vin的電壓範圍，該電壓檢測電路100僅應用簡單的電子元件即實現了對電源電壓是否滿足要求進行檢測，成本低且簡單實用。 The on-voltages V1 and V2 of the first LEDs and the second LEDs 2 and the voltage regulator VD of the Zener diode VD can be set as needed to verify the voltage Vin of the voltage source Vin. The voltage detection circuit 100 realizes the detection of whether the power supply voltage meets the requirements by using only simple electronic components, and the cost is low and simple and practical.
綜上所述，本發明確已符合發明專利的要件，爰依法提出專利申請。惟，以上所述者僅為本發明的較佳實施方式，本發明的範圍並不以上述實施方式為限，舉凡熟悉本案技藝的人士爰依本發明的精神所作的等效修飾或變化，皆應涵蓋於以下申請專利範圍內。 In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in accordance with the spirit of the present invention are It should be covered by the following patent application.
100‧‧‧電壓檢測電路 100‧‧‧Voltage detection circuit
Vin‧‧‧電壓源 Vin‧‧‧voltage source
VD‧‧‧穩壓管 VD‧‧‧ voltage regulator
SCR‧‧‧矽控整流器 SCR‧‧‧controlled rectifier
LED1‧‧‧第一發光二極體 LED1‧‧‧first light-emitting diode
LED2‧‧‧第二發光二極體 LED2‧‧‧Second light-emitting diode
R1、R2‧‧‧電阻 R1, R2‧‧‧ resistance
100‧‧‧電壓檢測電路 100‧‧‧Voltage detection circuit
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW099142722A TWI480555B (en) | 2010-12-08 | 2010-12-08 | Voltage detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW099142722A TWI480555B (en) | 2010-12-08 | 2010-12-08 | Voltage detecting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201224466A TW201224466A (en) | 2012-06-16 |
| TWI480555B true TWI480555B (en) | 2015-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW099142722A TWI480555B (en) | 2010-12-08 | 2010-12-08 | Voltage detecting circuit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI554017B (en) * | 2014-12-03 | 2016-10-11 | 萬國半導體（開曼）股份有限公司 | Method for voltage detection by b-duty |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4558226A (en) * | 1982-07-07 | 1985-12-10 | Tokyo Shibaura Denki Kabushiki Kaisha | Voltage detecting circuit with hysteresis characteristic and high noise immunity |
| US6121767A (en) * | 1986-01-15 | 2000-09-19 | Havel; Karel | Digital multimeter with variable color range indication |
| US20100123399A1 (en) * | 2008-11-18 | 2010-05-20 | Klaus Bollmann | LED lighting system with bypass circuit for failed LED |
-
2010
- 2010-12-08 TW TW099142722A patent/TWI480555B/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4558226A (en) * | 1982-07-07 | 1985-12-10 | Tokyo Shibaura Denki Kabushiki Kaisha | Voltage detecting circuit with hysteresis characteristic and high noise immunity |
| US6121767A (en) * | 1986-01-15 | 2000-09-19 | Havel; Karel | Digital multimeter with variable color range indication |
| US20100123399A1 (en) * | 2008-11-18 | 2010-05-20 | Klaus Bollmann | LED lighting system with bypass circuit for failed LED |
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| TW201224466A (en) | 2012-06-16 |
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