CN217335077U - Locking circuit for preventing lamp jumping during lamp turning of charger - Google Patents
Locking circuit for preventing lamp jumping during lamp turning of charger Download PDFInfo
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- CN217335077U CN217335077U CN202123406932.0U CN202123406932U CN217335077U CN 217335077 U CN217335077 U CN 217335077U CN 202123406932 U CN202123406932 U CN 202123406932U CN 217335077 U CN217335077 U CN 217335077U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
A circuit for preventing lamp jumping during lamp turning of a charger comprises an operational amplifier U1A, resistors R1-R4, a diode D1 and a triode Q1, wherein a power supply end of the operational amplifier is connected with Vcc, a non-inverting proportional input end is connected with a sampling current end Io, an inverting proportional input end is connected with a reference voltage Ref and is connected with a negative electrode of a diode D1, an anode of a diode D1 is connected with one end of the resistor R1, a collector of the triode Q1 and an anode of a light emitting diode LED1 in series after being connected with the resistor R2 in series, the other end of the resistor R1 is connected with the Vcc, the negative electrode of the light emitting diode LED1 is grounded, an emitter of the triode Q1 is grounded, one end of a base resistor R3, the other end of the resistor R3 is connected with an output end of the operational amplifier U1A and one end of the resistor R4, and the other end of the resistor R4 is connected with the light emitting diode LED2 in series and then grounded. The utility model discloses increase positive feedback and realize changeing the lamp and switch in the twinkling of an eye and lock the no-jump lamp on the operational amplifier circuit.
Description
Technical Field
The utility model belongs to the technical field of the charger application and specifically relates to utilize positive feedback to realize the circuit of dead function of lock behind the charger pilot lamp commentaries on classics light of fortune amplifier.
Background
With the development of lithium battery technology, lithium battery chargers are used more and more widely in the field of electric tools, and the high cost performance design of the chargers is a constant pursuit of enterprises making power chargers.
At present, the existing charger usually has a charging indicator light, and can switch the display when it is full, for example, the red light is lit when charging, and the green light is lit when full. When a circuit is designed, a red light is turned off and a green light is turned on at the same time when a charging current is smaller than a set value.
However, the conventional design scheme in the market has the phenomenon that time delay occurs in the conversion process of two lamps, or two lamps are simultaneously turned on, or the moment of repeated switching occurs, so that the use sense of consumers is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at delaying, switching improper problem that appear in the charger pilot lamp control circuit switching process, the dead circuit of lock that prevents the jump lamp when proposing a charger commentaries on classics light.
The technical scheme of the utility model is that:
the utility model provides a prevent lock circuit of lamp-jumping during charger commentaries on classics light, this circuit includes operational amplifier U1A, resistance R1-R4, diode D1 and triode Q1, operational amplifier U1A's power termination Vcc, operational amplifier U1A's homophase proportion input termination sample current end Io, inverse proportion input termination reference voltage Ref, connect diode D1's negative pole simultaneously, connect resistance R1's one end respectively behind diode D1's the positive pole series resistance R2, triode Q1's collecting electrode and emitting diode LED 1's positive pole, resistance R1's another termination power supply Vcc, emitting diode LED 1's negative pole ground, triode Q1's projecting pole ground connection, base resistance R3's one end, resistance R3's another termination operational amplifier U1A's output and resistance R4's one end, resistance R4's the other end concatenates ground connection behind emitting diode LED 2.
Further, during normal charging, the reference voltage Ref is lower than the voltage of the sampling current terminal Io.
The utility model has the advantages that:
the utility model discloses a charging current is listened to fortune amplifier and peripheral simulation detection circuitry, and when charging current was less than a certain setting value, the pilot lamp that charges switched with being full of the pilot lamp, increases positive feedback on fortune amplifier circuit and realizes changing the lamp and switch and lock not jump the lamp in the twinkling of an eye.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows a circuit diagram of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein.
A circuit for preventing lamp jumping during lamp turning of a charger comprises an operational amplifier U1A, resistors R1-R4, a diode D1 and a triode Q1, wherein a power supply end of the operational amplifier U1A is connected with Vcc, a non-inverting proportional input end of the operational amplifier U1A is connected with a sampling current end Io, an inverting proportional input end of the operational amplifier U1A is connected with a reference voltage Ref, and is connected with a cathode of the diode D1, an anode of the diode D1 is connected with one end of a resistor R1, a collector of a triode Q1 and an anode of a light emitting diode LED1 in series after being connected with a resistor R2 in series, the other end of a resistor R1 is connected with the Vcc, a cathode of the light emitting diode LED1 is grounded, an emitter of the triode Q1 is grounded, a base of the resistor R3 is connected with one end, the other end of the resistor R3 is connected with an output end of the operational amplifier U1A and one end of a resistor R4, and the other end of the resistor R4 is connected with the light emitting diode LED2 in series and then grounded.
As shown in fig. 1, Vcc supplies power for the operational amplifier, Ref sets a reference voltage point for the comparator to turn on the lamp current, Io samples the current, Ref voltage is lower than Io voltage during normal charging, the comparator outputs high level, Q1 is turned on, LED1 green light is turned off, LED2 red light is turned on, the Io voltage is gradually reduced along with charging, when the voltage is less than Ref, the comparator is turned back to low level, the red light is turned off, Q1 is turned off, D1 is turned on while Q1 is turned off, Ref is further locked to high level, positive feedback is formed, and it is guaranteed that there is no simultaneous lighting or lamp skipping of LED1 and LED 2.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (2)
1. A circuit for preventing lamp jumping during lamp turning of a charger is characterized by comprising an operational amplifier U1A, resistors R1-R4, a diode D1 and a triode Q1, wherein a power supply of the operational amplifier U1A is connected with Vcc, a non-inverting proportional input end of the operational amplifier U1A is connected with a sampling current end Io, an inverting proportional input end of the operational amplifier U1A is connected with a reference voltage Ref, and is also connected with the negative electrode of the diode D1, the positive electrode of the diode D1 is connected with one end of a resistor R1, the collector of the triode Q1 and the positive electrode of the LED1 after being connected with a resistor R2 in series, the other end of a resistor R1 is connected with the power supply Vcc, the negative electrode of the LED1 is grounded, the emitter of the triode Q1 is grounded, one end of a base resistor R3, the other end of the resistor R3 is connected with the output end of the operational amplifier U1A and one end of a resistor R4, and the other end of the resistor R4 is connected with the LED2 and then grounded.
2. The circuit of claim 1, wherein the reference voltage Ref is lower than the voltage of the sampling current terminal Io during normal charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123406932.0U CN217335077U (en) | 2021-12-30 | 2021-12-30 | Locking circuit for preventing lamp jumping during lamp turning of charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123406932.0U CN217335077U (en) | 2021-12-30 | 2021-12-30 | Locking circuit for preventing lamp jumping during lamp turning of charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217335077U true CN217335077U (en) | 2022-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123406932.0U Active CN217335077U (en) | 2021-12-30 | 2021-12-30 | Locking circuit for preventing lamp jumping during lamp turning of charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217335077U (en) |
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2021
- 2021-12-30 CN CN202123406932.0U patent/CN217335077U/en active Active
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