CN104779653A - Charging indicating circuit - Google Patents

Charging indicating circuit Download PDF

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Publication number
CN104779653A
CN104779653A CN201410013255.1A CN201410013255A CN104779653A CN 104779653 A CN104779653 A CN 104779653A CN 201410013255 A CN201410013255 A CN 201410013255A CN 104779653 A CN104779653 A CN 104779653A
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voltage
low
triode
indicator light
anode
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周明杰
杨俊昌
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Shenzhen Haiyangwang Illumination Technology Co ltd
Oceans King Lighting Science and Technology Co Ltd
Oceans King Dongguan Lighting Technology Co Ltd
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Shenzhen Haiyangwang Illumination Technology Co ltd
Oceans King Lighting Science and Technology Co Ltd
Oceans King Dongguan Lighting Technology Co Ltd
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Priority to CN201410013255.1A priority Critical patent/CN104779653A/en
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    • H02J7/027—

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Abstract

The embodiment of the invention discloses a charging indicating circuit, which comprises a first indicating lamp, a first divider resistor, a triode, a second indicating lamp and a voltage stabilizing diode, wherein: the anode of the first indicator lamp is connected with the anode of the low-voltage direct current, the cathode of the first indicator lamp is connected with the cathode of the low-voltage direct current, one end of the first divider resistor is connected with the anode of the low-voltage direct current, the other end of the first divider resistor is connected with the base of the triode, the collector of the triode is connected with the anode of the low-voltage direct current, the cathode of the voltage stabilizing diode is connected with the collector of the triode, the anode of the voltage stabilizing diode is connected with the cathode of the low-voltage direct current, the emitter of the triode is connected with the anode of the second indicator lamp, the cathode of the second indicator lamp is connected with the cathode of the low-voltage direct current. By adopting the method and the device, the access state of the external power supply and the charging state of the charging load can be prompted to a user in the charging process, and the user experience is improved.

Description

一种充电指示电路A charging indicator circuit

技术领域technical field

本发明涉及电子技术领域，尤其涉及一种充电指示电路。The invention relates to the field of electronic technology, in particular to a charging indicating circuit.

背景技术Background technique

随着电子技术的发展，越来越多的电子产品应运而生。其中，一类的电子产品需要通过充电来维持工作，但自身并没有电量显示的功能。那么，这类电子产品在充电过程中，用户很难判别电子产品的充电状态，若充电不足，将影响电子产品的续航能力，若充电过度，将损耗蓄电元件的寿命。With the development of electronic technology, more and more electronic products emerge as the times require. Among them, a class of electronic products need to be charged to maintain their work, but they do not have the function of power display. Then, during the charging process of this type of electronic product, it is difficult for the user to judge the charging state of the electronic product. If the charge is insufficient, the battery life of the electronic product will be affected. If the charge is over charged, the life of the storage element will be lost.

发明内容Contents of the invention

本发明实施例所要解决的技术问题在于，提供一种充电指示电路，可以实现在充电过程中提示外接电源的接入状态和充电负载的充电状态，提高用户体验。The technical problem to be solved by the embodiments of the present invention is to provide a charging indication circuit, which can realize the prompting of the access state of the external power supply and the charging state of the charging load during the charging process, and improve user experience.

为了解决上述技术问题，本发明实施例提供了一种充电指示电路，包括第一指示灯、第一分压电阻、三极管、第二指示灯以及稳压二极管，其中：In order to solve the above technical problems, an embodiment of the present invention provides a charging indication circuit, including a first indicator light, a first voltage dividing resistor, a triode, a second indicator light, and a Zener diode, wherein:

所述第一指示灯的阳极接入低压直流电的正极，所述第一指示灯的阴极接入低压直流电的负极，所述第一分压电阻的一端接入低压直流电的正极，所述第一分压电阻的另一端与所述三极管的基极相连，所述三极管的集电极接入低压直流电的正极，所述稳压二极管的阴极与所述三极管的集电极相连，所述稳压二极管的阳极接入低压直流电的负极，所述三极管的发射极与所述第二指示灯的阳极相连，所述第二指示灯的阴极接入低压直流电的负极，所述低压直流电用于给外接充电负载充电。The anode of the first indicator light is connected to the positive pole of the low-voltage direct current, the cathode of the first indicator light is connected to the negative pole of the low-voltage direct current, one end of the first voltage dividing resistor is connected to the positive pole of the low-voltage direct current, and the first indicator light is connected to the positive pole of the low-voltage direct current. The other end of the voltage dividing resistor is connected to the base of the triode, the collector of the triode is connected to the anode of the low-voltage direct current, the cathode of the Zener diode is connected to the collector of the triode, and the collector of the Zener diode The anode is connected to the negative pole of the low-voltage direct current, the emitter of the triode is connected to the anode of the second indicator light, the cathode of the second indicator light is connected to the negative pole of the low-voltage direct current, and the low-voltage direct current is used to charge the external charging load Charge.

实施本发明实施例，具有如下有益效果：本发明实施例在充电过程中，通过第一指示灯的亮灭状态来提示外接电源的接入状态，并利用稳压二极管的反向击穿特性和三极管的开关特性，结合第二指示灯的亮灭状态来提示充电负载的充电状态，提高用户体验。Implementing the embodiment of the present invention has the following beneficial effects: In the charging process, the embodiment of the present invention prompts the access state of the external power supply through the on-off state of the first indicator light, and utilizes the reverse breakdown characteristic of the Zener diode and The switching characteristics of the triode, combined with the on and off status of the second indicator light, prompts the charging status of the charging load and improves user experience.

附图说明Description of drawings

为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

图1是本发明实施例提供的一种充电指示电路的电路原理图。Fig. 1 is a schematic circuit diagram of a charging indication circuit provided by an embodiment of the present invention.

具体实施方式Detailed ways

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

图1是本发明实施例中一种充电指示电路的电路原理图。如图所示本发明实施例中的充电指示电路至少可以包括第一指示灯、第一分压电阻、三极管、第二指示灯以及稳压二极管，其中：FIG. 1 is a schematic circuit diagram of a charging indicating circuit in an embodiment of the present invention. As shown in the figure, the charging indication circuit in the embodiment of the present invention may at least include a first indicator light, a first voltage dividing resistor, a triode, a second indicator light and a Zener diode, wherein:

第一指示灯的阳极接入低压直流电的正极，第一指示灯的阴极接入低压直流电的负极，第一分压电阻的一端接入低压直流电的正极，第一分压电阻的另一端与三极管的基极相连，三极管的集电极接入低压直流电的正极，稳压二极管的阴极与三极管的集电极相连，稳压二极管的阳极接入低压直流电的负极，三极管的发射极与第二指示灯的阳极相连，第二指示灯的阴极接入低压直流电的负极，低压直流电用于给外接充电负载充电。The anode of the first indicator light is connected to the positive pole of the low-voltage direct current, the cathode of the first indicator light is connected to the negative pole of the low-voltage direct current, one end of the first voltage dividing resistor is connected to the positive pole of the low-voltage direct current, the other end of the first voltage dividing resistor is connected to the triode connected to the base of the triode, the collector of the triode is connected to the positive pole of the low-voltage direct current, the cathode of the Zener diode is connected to the collector of the triode, the anode of the Zener diode is connected to the negative pole of the low-voltage direct current, the emitter of the triode is connected to the second indicator light The anodes are connected, the cathode of the second indicator light is connected to the negative pole of the low-voltage direct current, and the low-voltage direct current is used to charge the external charging load.

可选的，充电指示电路还包括变压器和整流桥，变压器的次级端与整流桥的输入端相连，整流桥的输出端的正极与第一指示灯的阳极、第一分压电阻的一端以及三极管的集电极相连，整流桥的输出端的负极与第一指示灯的阴极、三极管的基极以及稳压二极管的阳极相连。需要指出的是，此时整流桥输出端的输出即为上述低压直流电。Optionally, the charging indication circuit further includes a transformer and a rectifier bridge, the secondary terminal of the transformer is connected to the input terminal of the rectifier bridge, the positive pole of the output terminal of the rectifier bridge is connected to the anode of the first indicator light, one end of the first voltage dividing resistor and a triode The collector of the rectifier bridge is connected, and the negative pole of the output terminal of the rectifier bridge is connected with the cathode of the first indicator light, the base of the triode and the anode of the Zener diode. It should be pointed out that the output of the output terminal of the rectifier bridge at this time is the above-mentioned low-voltage direct current.

可选的，充电指示电路还包括滤波电容，滤波电容的阳极接入低压直流电的正极，滤波电容的阴极接入低压直流电的负极。Optionally, the charging indication circuit further includes a filter capacitor, the anode of the filter capacitor is connected to the positive pole of the low-voltage direct current, and the cathode of the filter capacitor is connected to the negative pole of the low-voltage direct current.

可选的，充电指示电路还包括二极管，所述二极管的阳极接入低压直流电的正极。Optionally, the charging indication circuit further includes a diode, and the anode of the diode is connected to the positive pole of the low-voltage direct current.

相应的，充电指示电路还包括限流电阻，第一指示灯的阳极通过限流电阻接入低压直流电的正极。Correspondingly, the charging indication circuit further includes a current-limiting resistor, and the anode of the first indicator light is connected to the positive pole of the low-voltage direct current through the current-limiting resistor.

可选的，充电指示电路还包括第二分压电阻，第二分压电阻的一端与三极管的基极相连，第二分压电阻的另一端接入低压直流的负极。Optionally, the charging indication circuit further includes a second voltage dividing resistor, one end of the second voltage dividing resistor is connected to the base of the triode, and the other end of the second voltage dividing resistor is connected to the negative pole of the low-voltage direct current.

相应的，充电指示电路还包括第三分压电阻，三极管的集电极通过第三分压电阻接入低压直流电的正极。Correspondingly, the charging indication circuit further includes a third voltage dividing resistor, and the collector of the triode is connected to the positive pole of the low-voltage direct current through the third voltage dividing resistor.

可选的，上述整流桥的型号为1N4001。Optionally, the model of the above-mentioned rectifier bridge is 1N4001.

请参阅图1，如图所示的一种充电指示电路，其中，第一指示灯为D1，第二指示灯为D2，第一分压电阻为R1，三极管为Q1，稳压二极管为D4，变压器为R，整流桥为1N4001，二极管为D3，限流电阻为R1，第二分压电阻为R3，第三分压电阻为R4。Please refer to Figure 1, a charging indication circuit as shown in the figure, wherein the first indicator light is D1, the second indicator light is D2, the first voltage dividing resistor is R1, the triode is Q1, and the Zener diode is D4. The transformer is R, the rectifier bridge is 1N4001, the diode is D3, the current limiting resistor is R1, the second voltage dividing resistor is R3, and the third voltage dividing resistor is R4.

具体实现过程中，充电过程中，变压器B的初级端外接高压交流电，例如外接220V交流电。经过降压后，变压器B的次级端输出低压交流电到整流桥1N4001的输入端。经整流处理后，整流桥1N4001的输出端输出低压直流电。需要指出的是，该低压直流电一方面作为充电指示电路的内部电源，另一方面作为外接充电负载的充电电源。In a specific implementation process, during the charging process, the primary end of the transformer B is connected to a high-voltage alternating current, for example, a 220V alternating current. After step-down, the secondary end of the transformer B outputs low-voltage alternating current to the input end of the rectifier bridge 1N4001. After rectification, the output terminal of the rectifier bridge 1N4001 outputs low-voltage direct current. It should be pointed out that the low-voltage direct current is used as the internal power supply of the charging indication circuit on the one hand, and as the charging power supply of the external charging load on the other hand.

进一步的，整流桥1N4001的输出端输出低压直流电后，第一指示灯D1发光，提示电路已接入外接电源，即上述高压交流电。Furthermore, after the output terminal of the rectifier bridge 1N4001 outputs low-voltage direct current, the first indicator light D1 lights up, indicating that the circuit has been connected to an external power source, that is, the above-mentioned high-voltage alternating current.

更进一步的，后续充电过程中：Furthermore, during the subsequent charging process:

当外接充电负载的电压不高于预设阈值时，即充电负载未充满电时，整流器1N4001的输出端输出的低压直流电不足以击穿稳压二极管D4，稳压二极管D4相当于断路，三极管Q1的集电极的电压为低压直流电的正极电压，显然大于三极管Q1的基极的电压，进而三极管Q1导通，从而第二指示灯D2发光，提示外接充电负载当前仍在充电，其电量尚未充满。When the voltage of the external charging load is not higher than the preset threshold, that is, when the charging load is not fully charged, the low-voltage DC output from the output terminal of the rectifier 1N4001 is not enough to break down the Zener diode D4, which is equivalent to an open circuit, and the transistor Q1 The voltage of the collector is the positive voltage of the low-voltage direct current, which is obviously greater than the voltage of the base of the transistor Q1, and then the transistor Q1 is turned on, so that the second indicator light D2 lights up, indicating that the external charging load is still charging, and its power is not yet fully charged.

当外接充电负载的电压高于预设阈值时，即充电负载已充满电时，低压直流电的电压将会升高，进而击穿所述稳压二极管D4，三极管Q1的集电极的电压等于稳压二极管D4的反向击穿电压，其中，选取的稳压二极管D4的反向击穿电压小于三极管Q1的基极电压，即三极管Q1的集电极电压小于基极电压，进而三极管Q1不导通，从而第二指示灯D2不发光，提示外接充电负载的电量已充满。When the voltage of the external charging load is higher than the preset threshold, that is, when the charging load is fully charged, the voltage of the low-voltage direct current will increase, and then break down the voltage regulator diode D4, and the voltage of the collector of the triode Q1 is equal to the voltage regulator The reverse breakdown voltage of the diode D4, wherein the reverse breakdown voltage of the selected Zener diode D4 is smaller than the base voltage of the transistor Q1, that is, the collector voltage of the transistor Q1 is lower than the base voltage, and the transistor Q1 is not turned on, Therefore, the second indicator light D2 does not emit light, indicating that the electric quantity of the external charging load is fully charged.

本发明实施例在充电过程中，通过第一指示灯的亮灭状态来提示外接电源的接入状态，并利用稳压二极管的反向击穿特性和三极管的开关特性，结合第二指示灯的亮灭状态来提示充电负载的充电状态，提高用户体验。In the embodiment of the present invention, during the charging process, the on-off state of the first indicator light is used to prompt the connection state of the external power supply, and the reverse breakdown characteristic of the Zener diode and the switching characteristic of the triode are combined with the second indicator light. The on and off status indicates the charging status of the charging load and improves user experience.

以上所揭露的仅为本发明较佳实施例而已，当然不能以此来限定本发明之权利范围，因此依本发明权利要求所作的等同变化，仍属本发明所涵盖的范围。The above disclosures are only preferred embodiments of the present invention, and certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (10)

1. a charging indication, is characterized in that, described circuit comprises the first indicator light, the first divider resistance, triode, the second indicator light and voltage stabilizing didoe, wherein:
The positive pole of the anode access low-voltage DC of described first indicator light, the negative pole of the negative electrode access low-voltage DC of described first indicator light, the positive pole of one end access low-voltage DC of described first divider resistance, the other end of described first divider resistance is connected with the base stage of described triode, the positive pole of the collector electrode access low-voltage DC of described triode, the negative electrode of described voltage stabilizing didoe is connected with the collector electrode of described triode, the negative pole of the anode access low-voltage DC of described voltage stabilizing didoe, the emitter of described triode is connected with the anode of described second indicator light, the negative pole of the negative electrode access low-voltage DC of described second indicator light, described low-voltage DC is used for charging to external charge load.
2. charging indication as claimed in claim 1, it is characterized in that, described circuit also comprises transformer and rectifier bridge, the secondary end of described transformer is connected with the input of described rectifier bridge, the positive pole of the output of described rectifier bridge is connected with the anode of described first indicator light, one end of described first divider resistance and the collector electrode of described triode, and the negative pole of the output of described rectifier bridge is connected with the anode of the negative electrode of described first indicator light, the base stage of described triode and described voltage stabilizing didoe.
3. charging indication as claimed in claim 2, it is characterized in that, when the external High Level AC Voltage of the primary side of described transformer, the secondary end of described transformer exports the input of low-voltage AC to described rectifier bridge, and the output of described rectifier bridge exports described low-voltage DC.
4. charging indication as claimed in claim 3, is characterized in that, after the output of described rectifier bridge exports described low-voltage DC, described first indicator light is luminous, wherein:
When the voltage of external charge load is not higher than predetermined threshold value, the undertension of described low-voltage DC is to puncture described voltage stabilizing didoe, and then the collector voltage of described triode is greater than base voltage, described triode ON, thus described second indicator light is luminous;
When the voltage of external charge load is higher than described predetermined threshold value, the voltage of described low-voltage DC will puncture described voltage stabilizing didoe, and then the collector voltage of described triode is less than base voltage, the not conducting of described triode, thus described second indicator light is not luminous.
5. charging indication as claimed in claim 1, it is characterized in that, described circuit also comprises filter capacitor, the positive pole of the anode access low-voltage DC of described filter capacitor, the negative pole of the negative electrode access low-voltage DC of described filter capacitor.
6. charging indication as claimed in claim 1, it is characterized in that, described circuit also comprises diode, the positive pole of the anode access low-voltage DC of described diode.
7. charging indication as claimed in claim 1, it is characterized in that, described circuit also comprises current-limiting resistance,
The positive pole of the anode access low-voltage DC of described first indicator light comprises:
The anode of described first indicator light accesses the positive pole of low-voltage DC by described current-limiting resistance.
8. charging indication as claimed in claim 1, it is characterized in that, described circuit also comprises the second divider resistance, and one end of described second divider resistance is connected with the base stage of described triode, the negative pole of the other end access low-voltage direct of described second divider resistance.
9. charging indication as claimed in claim 1, it is characterized in that, described circuit also comprises the 3rd divider resistance,
The positive pole of the collector electrode access low-voltage DC of described triode comprises:
The collector electrode of described triode accesses the positive pole of low-voltage DC by described 3rd divider resistance.
10. charging indication as claimed in claim 1, it is characterized in that, the model of described rectifier bridge is 1N4001.
CN201410013255.1A 2014-01-10 2014-01-10 Charging indicating circuit Pending CN104779653A (en)

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CN107231014A (en) * 2016-09-20 2017-10-03 华为技术有限公司 A kind of charging circuit, terminal and charging system
CN107231014B (en) * 2016-09-20 2019-02-19 华为技术有限公司 A kind of charging circuit, terminal and charging system
US10819127B2 (en) 2016-09-20 2020-10-27 Huawei Technologies Co., Ltd. Charging circuit, terminal, and charging system
CN113933716A (en) * 2021-09-29 2022-01-14 深圳市昂佳科技有限公司 Ultra-low standby power consumption nanoamp wide voltage range LED battery power indicating system

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