CN101969707B - A kind of lamp switching circuit of battery charger - Google Patents

A kind of lamp switching circuit of battery charger Download PDF

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Publication number
CN101969707B
CN101969707B CN201010250204.2A CN201010250204A CN101969707B CN 101969707 B CN101969707 B CN 101969707B CN 201010250204 A CN201010250204 A CN 201010250204A CN 101969707 B CN101969707 B CN 101969707B
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China
Prior art keywords
negative pole
lamp
battery charger
high frequency
led
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CN101969707A (en
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汪军
黄祖好
郑国浩
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Guangdong Real Design Intelligent Technology Co Ltd
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Guangdong Real Design Intelligent Technology Co Ltd
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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The present invention relates to a kind of lamp switching circuit of battery charger, comprise and turn lamp triode Q1 by high frequency transformer TR, current detection circuit D2, R1, power supply circuits are made up of high frequency transformer TR level (III), rectifier diode D1, filter capacitor C1, high frequency transformer TR secondary winding (III) one end is connected with rectifier diode D1 positive pole, its other end and filter capacitor C1 negative pole are connected to GND, described current detection circuit D2 positive pole is connected with R1 one end, and D2 negative pole is connected with the R1 other end.The present invention, owing to eliminating an operational amplifier and reference voltage assembly, enormously simplify lamp switching circuit of battery charger, and production cost and components and parts cost all reduce.During the present invention is mainly used in, small power electric electrolytic battery charger turns in circuit for lamp, as in electronic toy series products.

Description

A kind of lamp switching circuit of battery charger
Technical field: the present invention relates to a kind of circuit, especially a kind of lamp switching circuit of battery charger, relates to battery boosting technology field.
Background technology: in, in small power electric electrolytic battery charger family, battery charging turns the safe and reliable importance that lamp instruction is battery charging, its directly reaction to charge indicating status to user, prevent battery overcharge and cause battery to fill bad, our personal safety of exploding, jeopardize.
At present, existing charging turn lamp typical circuit generally select operational amplifier to compare device realize turn lamp function.This typical circuit comprises: operational amplifier, current detection circuit, reference voltage device form.
As shown in Figure 1, R4, R5, R6, ZD1, C11 form reference voltage and are connected to amplifier 2 pin, and R7, R8 form current detection circuit.When charger charges the battery, become level and smooth DC charged the battery from D1 rectification, C1 filtering, now R7 there is electric current to flow through, R7 two ends coating-forming voltage, this voltage is by 3 pin of current-limiting resistance R8 to IC1A compared with 2 pin reference voltages, and now 3 pin voltages are greater than 2 pin, comparator 1 pin exports high level and lights LED2 luminescence, this state of indicating user is just in charging, and simultaneously Q2 base stage obtains high level and conducting, drags down LED1 voltage and makes it not light.
When battery is full of, cell voltage raises, electric current on R7 reduces, and R7 both end voltage reduces, this voltage by R8 to amplifier 3 pin compared with 2 pin, 3 pin are less than 2 pin voltages, amplifier now overturns and exports as low level, and LED2 can not light, and Q2 can not conducting simultaneously, Vcc to be powered to LED1 by divider resistance R1 and lights, and this state of indicating user is that battery is full of.
The above-mentioned weak point turning circuit for lamp is adopted to be: components and parts used are more, circuit more complicated, and fault in production rate is high, and components and parts cost is high.
Summary of the invention: for above-mentioned the deficiencies in the prior art, the invention provides a kind of circuit simple, the lamp switching circuit of battery charger that cost is low.
For achieving the above object, the technical solution used in the present invention is: a kind of lamp switching circuit of battery charger, comprise high frequency transformer TR, turn lamp triode Q1, current detection circuit D2, R1, power supply circuits are made up of high frequency transformer TR level III, rectifier diode D1, filter capacitor C1, high frequency transformer TR secondary winding III one end is connected with rectifier diode D1 positive pole, its other end and filter capacitor C1 negative pole are connected to GND, it is characterized in that: described current detection circuit D2 positive pole is connected with R1 one end, and D2 negative pole is connected with the R1 other end.Turn circuit for lamp to be made up of triode Q1, current-limiting resistance R2, divider resistance R3, LED 1, LED 2.Triode Q1 emitter is connected with filter capacitor C1 positive pole, D2 negative pole, and triode Q1 base stage connects with current-limiting resistance R2 one end, and triode Q1 collector electrode is connected with LED 1 positive pole.The current-limiting resistance R2 other end is connected with D2 negative pole, and LED 2 positive pole is connected with D2 negative pole, and LED 1 negative pole is connected with LED 2 negative pole, and node is connected with R3 one end, another termination GND of R3.
The present invention, owing to eliminating an operational amplifier and reference voltage assembly, enormously simplify lamp switching circuit of battery charger, and production cost and components and parts cost all reduce.During the present invention is mainly used in, small power electric electrolytic battery charger turns in circuit for lamp, as in electronic toy series products.
Accompanying drawing illustrates:
Fig. 1 is the schematic diagram of the existing lamp switching circuit of battery charger be made up of operational amplifier etc.
Fig. 2 is the schematic diagram of the lamp switching circuit of battery charger of invention.
Embodiment:
As shown in Figure 2: high-frequency alternating current, after rectifier diode D1 rectification, C1 filtering, obtains level and smooth DC power supply.When the battery cell is charged, D2 two ends have electric current to flow through and coating-forming voltage makes Q1 conducting, and LED1 lights.Now can not light because LED2 is under-voltage, this state of indicating user be battery just in charging.When battery is full of, cell voltage rises, and flowing through D2 two ends electric current is that zero, D2 both end voltage is equal, and Q1 does not have bias voltage cut-off that LED1 can not be lighted, and LED2 and R3 forms loop and makes it to light simultaneously, and this state of indicating user is that battery is full of.

Claims (1)

1. a lamp switching circuit of battery charger, it is characterized in that: comprise high frequency transformer TR, turn lamp triode Q1, current detection circuit D2, R1, power supply circuits are by high frequency transformer TR level III, rectifier diode D1, filter capacitor C1 forms, high frequency transformer TR secondary winding III one end is connected with rectifier diode D1 positive pole, its other end and filter capacitor C1 negative pole are connected to GND, described current detection circuit D2 positive pole is connected with R1 one end, D2 negative pole is connected with the R1 other end, turn circuit for lamp by triode Q1, current-limiting resistance R2, divider resistance R3, LED 1, LED 2 forms, triode Q1 emitter and filter capacitor C1 positive pole, D2 negative pole is connected, triode Q1 base stage connects with current-limiting resistance R2 one end, triode Q1 collector electrode is connected with LED 1 positive pole, the current-limiting resistance R2 other end is connected with D2 negative pole, LED 2 positive pole is connected with D2 negative pole, LED 1 negative pole is connected with LED 2 negative pole, node is connected with R3 one end, another termination GND of R3.
CN201010250204.2A 2010-08-10 2010-08-10 A kind of lamp switching circuit of battery charger Active CN101969707B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201010250204.2A CN101969707B (en) 2010-08-10 2010-08-10 A kind of lamp switching circuit of battery charger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201010250204.2A CN101969707B (en) 2010-08-10 2010-08-10 A kind of lamp switching circuit of battery charger

Publications (2)

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CN101969707A CN101969707A (en) 2011-02-09
CN101969707B true CN101969707B (en) 2015-12-30

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CN201010250204.2A Active CN101969707B (en) 2010-08-10 2010-08-10 A kind of lamp switching circuit of battery charger

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106208227B (en) * 2016-08-13 2019-09-20 严宗周 A kind of the charger states display circuit and display methods of low energy consumption
CN106787042A (en) * 2016-12-21 2017-05-31 江西佰仕通电子科技有限公司 Aptitude chargeable circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2276221Y (en) * 1996-04-22 1998-03-11 宝山钢铁(集团)公司 Capacitance type charger
CN1564421A (en) * 2004-03-17 2005-01-12 毛锦铭 Charger for lithium cell
CN201821539U (en) * 2010-08-10 2011-05-04 佛山市顺德区瑞德电子实业有限公司 Lamp switching circuit of battery charger

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2276221Y (en) * 1996-04-22 1998-03-11 宝山钢铁(集团)公司 Capacitance type charger
CN1564421A (en) * 2004-03-17 2005-01-12 毛锦铭 Charger for lithium cell
CN201821539U (en) * 2010-08-10 2011-05-04 佛山市顺德区瑞德电子实业有限公司 Lamp switching circuit of battery charger

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Address after: 528200, No. 1, Rui Xiang Road, Daliang Industrial Park, Shunde District, Guangdong, Foshan, Fengxiang

Applicant after: GUANGDONG REAL-DESIGN INTELLIGENT TECHNOLOGY Co.,Ltd.

Address before: 528200 Guangdong province Foshan city Shunde District Daliang Industrial Park Fengxiang Huaye Road No. 1

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Free format text: CORRECT: APPLICANT; FROM: FOSHAN SHUNDE REALDESIGN ELECTRONICS INDUSTRY CO., LTD. TO: GUANGDONG REAL-DESIGN INTELLIGENT TECHNOLOGY CO., LTD.

C14 Grant of patent or utility model
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Denomination of invention: A battery charger turn light circuit

Effective date of registration: 20230725

Granted publication date: 20151230

Pledgee: Shunde Guangdong rural commercial bank Limited by Share Ltd.

Pledgor: GUANGDONG REAL-DESIGN INTELLIGENT TECHNOLOGY Co.,Ltd.

Registration number: Y2023980049766