CN103346551A - Power supply reversal connection alarming type charger - Google Patents
Power supply reversal connection alarming type charger Download PDFInfo
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- CN103346551A CN103346551A CN2013102333902A CN201310233390A CN103346551A CN 103346551 A CN103346551 A CN 103346551A CN 2013102333902 A CN2013102333902 A CN 2013102333902A CN 201310233390 A CN201310233390 A CN 201310233390A CN 103346551 A CN103346551 A CN 103346551A
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- field effect
- effect transistor
- power supply
- comparator
- grounding ports
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Abstract
The invention discloses a power supply reversal connection alarming type charger which comprises a protection circuit. The protection circuit is arranged between a grounding port and an inner circuit. The protection circuit comprises a resistor R1, a comparator M and a field-effect tube Q. A source electrode of the field-effect tube Q is connected with the grounding port. A drain electrode is connected with the inner circuit. One end of the resistor R1 is connected with the drain electrode of the field-effect tube Q and the other end of the resistor R1 is connected to the ground. Two input ends of the comparator M are connected with the two ends of the resistor R1 respectively and the output end of the comparator M is connected with a grid electrode of the field-effect tube Q. The power supply reversal connection alarming type charger has the advantage that when the grounding port of the charger is connected with a power supply, the circuit of the charger is turned on to cut off connection between the grounding port and the inner circuit and protect the charger.
Description
Technical field
The present invention relates to a kind of protective circuit, particularly relate to a kind of power supply reversal connection alarm type charger.
Background technology
A lot of chargers all are provided with charging port and grounding ports; during charging; charging port connects power supply; grounding ports ground connection; can carry out quick charge to electric; but when grounding ports connects power supply; the charger internal circuit causes counter-rotating; can destroy the circuit in the charger; so the grounding ports place of existing charger all can arrange protective circuit, but existing protective circuit only is protection protection charger, places charger and is destroyed; the user does not still know the port mistake, causes charging unsuccessful.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of power supply reversal connection alarm type charger is provided, after overcoming existing charger grounding ports and connecting power supply, the user does not know mistake, thereby causes charging unsuccessful defective.
Purpose of the present invention is achieved through the following technical solutions: power supply reversal connection alarm type charger; comprise a protective circuit; protective circuit is arranged between grounding ports and the internal circuit; it comprises resistance R 1; comparator M and field effect transistor Q1; the source electrode of field effect transistor Q1 connects grounding ports; drain electrode connects internal circuit; resistance R 1 one ends connect the drain electrode of field effect transistor Q1; other end ground connection; two inputs of comparator M are connected respectively to the two ends of resistance R 1; its output is connected to the grid of field effect transistor Q1; also comprise a LED warning circuit; the LED warning circuit comprises trigger J; field effect transistor Q2 and Light-Emitting Diode D; described Light-Emitting Diode D positive pole is connected to grounding ports, and negative pole is connected to the drain electrode of field effect transistor Q2, the source ground of field effect transistor Q2; the signal controlling end of trigger J is connected to the output of comparator M, and the output of trigger J connects the grid of field effect transistor Q2.In this circuit, when grounding ports connects power supply, namely produce pressure drop on the resistance R 1, thereby make comparator M upset, close swap switch device field effect transistor Q1, cut off grounding ports and internal circuit, protected internal circuit effectively; Comparator M also controls trigger J, and then control field effect transistor Q2 unlatching, makes that the Light-Emitting Diode D that connects with field effect transistor Q2 is luminous, reminds the user port wrong.
Further, above-mentioned grounding ports is to being provided with a protective resistance R2 between the source electrode of field effect pipe Q, and protection field effect transistor Q1 avoids field effect transistor Q1 to burn out.
Further, the positive source of above-mentioned comparator M connects grounding ports, power cathode ground connection, because this circuit only needs just to work when grounding ports connects power supply again, need not energising at other times, provided by grounding ports so comparator M starts power supply, after grounding ports connects power supply, start comparator M, can not hinder the work of this circuit.
The invention has the beneficial effects as follows: when this circuit connects power supply in the charger grounding ports, namely start, block being connected between grounding ports and the internal circuit, protected charger; It is luminous that a LED also is set, and reminds the user port wrong.
Description of drawings
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the structural representation of embodiment 2.
Embodiment
The present invention is described in further detail below in conjunction with embodiment, but structure of the present invention is not limited only to following examples:
[embodiment 1]
As shown in Figure 1; power supply reversal connection alarm type charger; comprise a protective circuit; protective circuit is arranged between grounding ports and the internal circuit; it comprises resistance R 1; comparator M and field effect transistor Q1; the source electrode of field effect transistor Q1 connects grounding ports; drain electrode connects internal circuit; resistance R 1 one ends connect the drain electrode of field effect transistor Q1; other end ground connection; two inputs of comparator M are connected respectively to the two ends of resistance R 1; its output is connected to the grid of field effect transistor Q1; also comprise a LED warning circuit, the LED warning circuit comprises trigger J; field effect transistor Q2 and Light-Emitting Diode D, described Light-Emitting Diode D positive pole is connected to grounding ports; negative pole is connected to the drain electrode of field effect transistor Q2; the source ground of field effect transistor Q2, the signal controlling end of trigger J is connected to the output of comparator M, and the output of trigger J connects the grid of field effect transistor Q2.In this circuit, when grounding ports connects power supply, namely produce pressure drop on the resistance R 1, thereby make comparator M upset, close swap switch device field effect transistor Q1, cut off grounding ports and internal circuit, protected internal circuit effectively; Comparator M also controls trigger J, and then control field effect transistor Q2 unlatching, makes that the Light-Emitting Diode D that connects with field effect transistor Q2 is luminous, reminds the user port wrong.
[embodiment 2]
As shown in Figure 2, present embodiment is on the basis of embodiment 1, and to being provided with a protective resistance R2 between the source electrode of field effect pipe Q1, protection field effect transistor Q1 avoids field effect transistor Q1 to burn out in grounding ports.
The positive source of the comparator M of present embodiment connects grounding ports, power cathode ground connection, because this circuit only needs just to work when grounding ports connects power supply again, need not energising at other times, so starting power supply, comparator M provided by grounding ports, after grounding ports connects power supply, start comparator M, can not hinder the work of this circuit.
Claims (3)
1. power supply reversal connection alarm type charger; comprise a protective circuit; protective circuit is arranged between grounding ports and the internal circuit; it comprises resistance R 1; comparator M and field effect transistor Q1; the source electrode of field effect transistor Q1 connects grounding ports; drain electrode connects internal circuit; resistance R 1 one ends connect the drain electrode of field effect transistor Q1; other end ground connection; two inputs of comparator M are connected respectively to the two ends of resistance R 1; its output is connected to the grid of field effect transistor Q1; it is characterized in that; also comprise a LED warning circuit, the LED warning circuit comprises trigger J; field effect transistor Q2 and Light-Emitting Diode D, described Light-Emitting Diode D positive pole is connected to grounding ports; negative pole is connected to the drain electrode of field effect transistor Q2; the source ground of field effect transistor Q2, the signal controlling end of trigger J is connected to the output of comparator M, and the output of trigger J connects the grid of field effect transistor Q2.
2. power supply reversal connection alarm type charger according to claim 1 is characterized in that, described grounding ports is to being provided with a protective resistance R2 between the source electrode of field effect pipe Q1.
3. power supply reversal connection alarm type charger according to claim 1 is characterized in that, the positive source of described comparator M connects grounding ports, power cathode ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102333902A CN103346551A (en) | 2013-06-14 | 2013-06-14 | Power supply reversal connection alarming type charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102333902A CN103346551A (en) | 2013-06-14 | 2013-06-14 | Power supply reversal connection alarming type charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103346551A true CN103346551A (en) | 2013-10-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102333902A Pending CN103346551A (en) | 2013-06-14 | 2013-06-14 | Power supply reversal connection alarming type charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103346551A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000008734A1 (en) * | 1998-08-04 | 2000-02-17 | Siemens Aktiengesellschaft | Circuit and method for polarity reversal protection |
| CN201440160U (en) * | 2009-07-24 | 2010-04-21 | 深圳和而泰智能控制股份有限公司 | Detection circuit, device and equipment with reversed-connection zero-phase line |
| CN201616664U (en) * | 2010-01-11 | 2010-10-27 | 李琪 | Mobile phone charger overheating alarm and protection device |
| CN202455064U (en) * | 2011-12-16 | 2012-09-26 | 濮阳三友电器有限公司 | Reverse-connection preventing alarm circuit |
| CN203278228U (en) * | 2013-06-14 | 2013-11-06 | 成都锐奕信息技术有限公司 | Charger with alarm function of power supply reversal connection |
-
2013
- 2013-06-14 CN CN2013102333902A patent/CN103346551A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000008734A1 (en) * | 1998-08-04 | 2000-02-17 | Siemens Aktiengesellschaft | Circuit and method for polarity reversal protection |
| CN201440160U (en) * | 2009-07-24 | 2010-04-21 | 深圳和而泰智能控制股份有限公司 | Detection circuit, device and equipment with reversed-connection zero-phase line |
| CN201616664U (en) * | 2010-01-11 | 2010-10-27 | 李琪 | Mobile phone charger overheating alarm and protection device |
| CN202455064U (en) * | 2011-12-16 | 2012-09-26 | 濮阳三友电器有限公司 | Reverse-connection preventing alarm circuit |
| CN203278228U (en) * | 2013-06-14 | 2013-11-06 | 成都锐奕信息技术有限公司 | Charger with alarm function of power supply reversal connection |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131009 |