CN101932153B - LED emergency light circuit supplied by wide voltage power supply - Google Patents

LED emergency light circuit supplied by wide voltage power supply Download PDF

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Publication number
CN101932153B
CN101932153B CN2009101082741A CN200910108274A CN101932153B CN 101932153 B CN101932153 B CN 101932153B CN 2009101082741 A CN2009101082741 A CN 2009101082741A CN 200910108274 A CN200910108274 A CN 200910108274A CN 101932153 B CN101932153 B CN 101932153B
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China
Prior art keywords
power supply
led
voltage
unit
battery
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CN2009101082741A
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Chinese (zh)
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CN101932153A (en
Inventor
周明杰
王学军
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海洋王照明科技股份有限公司
深圳市海洋王照明工程有限公司
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Priority to CN2009101082741A priority Critical patent/CN101932153B/en
Publication of CN101932153A publication Critical patent/CN101932153A/en
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Publication of CN101932153B publication Critical patent/CN101932153B/en

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Abstract

The invention relates to an LED emergency light circuit supplied by a wide voltage power supply, which comprises a voltage stabilization unit, a control unit and an LED drive unit, wherein the voltage stabilization unit is connected with an external power and is used for performing voltage stabilization and filtration on the external power and outputting power for the control unit to operate; the control unit is connected with batteries and is supplied with the power by the batteries while being not connected with the external power; the control unit is used for judging whether the voltage stabilization unit outputs the current and respectively generating a closing control signal and a starting control signal to be sent to the LED drive unit; when the LED drive unit receives the closing control signal, a battery path for supplying the power for the LED drive unit is cut off, so that the LED is directly driven by the external power via a peripheral circuit; and when the LED drive unit receives the starting control signal, the battery path for supplying the power for the LED drive unit is started, so that the LED is driven by constant current of the LED drive unit. The invention can realize wide voltage power input and voltage stabilization output and eliminate electromagnetic interference, and has simple circuit structure and stable performance.

Description

A kind of LED emergency light circuit supplied by wide voltage power supply
Technical field
The present invention relates to the LED emergency light circuit, more particularly, relate to a kind of LED emergency light circuit supplied by wide voltage power supply.
Background technology
Emergency light has remote searchlighting function and closely illuminates function on a large scale, can emergent use when having a power failure.It can be when normal power supply, automatically to the backup battery charging, and realizes switching when having a power failure battery-powered automatically.Relative general lighting light fixture, it is easy to carry, also can be used as mobile light source, as arbitrarily moving at home, the also usefulness that goes camping to the field of portability.
The LED emergency light has that consumed energy is low, and volume is little, and is suitable for variable environment.The LED emergency light uses low-tension supply, and supply power voltage is between 6-24V, and is different and different according to product, so it is a safer power supply of ratio use high voltage source, is specially adapted to the public place.Use the LED emergency light of wide voltage source power supply, it uses the MCU control chip usually, and electromagnetic interference is bigger to the influence of MCU, is easy to generate wrong control signal and makes the power supply switching of LED lamp go wrong.Existing in addition emergency light structure more complicated, volume is also bigger, relatively power consumption, long-time use burns out easily, and useful life is short.
Summary of the invention
The technical problem that the present invention will solve is, the wide voltage source of LED emergency light is carried out voltage stabilizing and filtering electromagnetic interference, and a kind of LED emergency light circuit is provided simultaneously.
The present invention provides a kind of LED emergency light circuit supplied by wide voltage power supply, comprises voltage regulation unit, control unit and LED driver element;
Said voltage regulation unit links to each other with external power supply, and to its voltage stabilizing and filtering, output supplies said control unit work; Said control unit also is connected with battery, and is battery-powered when not connecing external power supply; Said control unit judges that voltage regulation unit has no current output, produces the switching control signal respectively and gives the LED driver element; The LED driver element turn-offs the path that battery is the power supply of LED driver element when receiving the shutoff control signal, LED is directly driven through peripheral circuit by external power supply; The LED driver element is opened the path of battery for the power supply of LED driver element, by LED driver element constant-current driving LED when receiving the unlatching control signal.
LED emergency light circuit supplied by wide voltage power supply of the present invention also comprises charging feed unit and charhing unit; Said charging feed unit links to each other with external power supply, supplies with said charhing unit through direct current conversion back battery is charged.
In LED emergency light circuit supplied by wide voltage power supply of the present invention, said voltage regulation unit comprises rectifier diode, voltage regulation resistance, adjustment triode, voltage stabilizing didoe and filter capacitor; Said adjustment transistor collector links to each other with external power supply through reverse rectifier diode, and its base stage is through voltage stabilizing didoe ground connection, and its emitter is through filter capacitor ground connection, and its collector electrode links to each other through voltage regulation resistance with base stage; The emitter of said adjustment triode is connected with LED driver element input with said control unit as the voltage regulation unit output, for it provides filtered burning voltage.
In LED emergency light circuit supplied by wide voltage power supply of the present invention, said charging feed unit comprises the direct current conversion chip, and model is MC34063A.
In LED emergency light circuit supplied by wide voltage power supply of the present invention, said charhing unit comprises the battery charge chip, and model is CE4054.
In LED emergency light circuit supplied by wide voltage power supply of the present invention, said LED driver element comprises the LED constant-current driven chip, and model is QX7136.
The LED emergency light circuit supplied by wide voltage power supply of embodiment of the present invention has following beneficial effect: said voltage regulation unit at first through setting up, realize wide voltage source input voltage stabilizing output, and filtering simultaneously is to remove electromagnetic interference; And by control unit according to whether having external power supply, control LED by external power supply power supply or battery-powered.Circuit of the present invention has also been set up battery power supply unit and charhing unit, can battery be charged having under the situation of external power supply, so that having a power failure or other emergency rating does not have under the situation of external power supply, be the LED power supply by battery.The present invention adopts the LED lamp as lighting, and volume is little, and energy consumption is low.What deserves to be mentioned is that LED emergency light circuit supplied by wide voltage power supply overall performance provided by the present invention is stable.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the structural representation of LED emergency light circuit supplied by wide voltage power supply embodiment of the present invention;
Fig. 2 is the circuit theory diagrams of LED emergency light circuit supplied by wide voltage power supply embodiment of the present invention.
Embodiment
As shown in Figure 1, in the structural representation of LED emergency light circuit supplied by wide voltage power supply embodiment of the present invention, comprise voltage regulation unit 100, control unit 400 and LED driver element 500;
Said voltage regulation unit 100 links to each other with external power supply 800, and to its voltage stabilizing and filtering, output supplies said control unit 400 work; Said control unit 400 also is connected with battery 700, when not connecing external power supply 800, is supplied power by battery 700; Said control unit 400 judges that voltage regulation unit 100 has no current output, produces the switching control signal respectively and gives LED driver element 500; LED driver element 500 is when receiving the shutoff control signal, and turn-offing battery 700 is the path of LED driver element 500 power supplies, and LED600 is directly driven through peripheral circuit 900 by external power supply 800; LED driver element 500 is when receiving the unlatching control signal, and opening battery 700 is the path of LED driver element 500 power supplies, by LED driver element 500 constant-current driving LEDs 600.
What deserves to be mentioned is that LED emergency light circuit supplied by wide voltage power supply provided by the invention also comprises charging feed unit 200 and charhing unit 300; Said charging feed unit 200 links to each other with external power supply 800, supplies with 300 pairs of batteries 700 of said charhing unit through direct current conversion back and charges.
Fig. 2 is the circuit theory diagrams of LED emergency light circuit supplied by wide voltage power supply embodiment of the present invention.
Be elaborated in the face of each circuit unit among Fig. 2 down:
1. voltage regulation unit 100
Said voltage regulation unit 100 comprises rectifier diode D6, voltage regulation resistance R10, adjustment triode Q4, voltage stabilizing didoe D5 and filter capacitor C6; Said adjustment triode Q4 collector electrode links to each other with external power supply 800 through reverse rectifier diode D6, and its base stage is through voltage stabilizing didoe D5 ground connection, and its emitter is through filter capacitor C6 ground connection, and its collector electrode links to each other through voltage regulation resistance R10 with base stage; The emitter of said adjustment triode Q4 is connected with said control unit 400 inputs as voltage regulation unit 100 outputs, for it provides filtered burning voltage.
2. feed unit 200 charges
Charging feed unit 200 comprises a direct current conversion chip, and the chip U2 model that present embodiment uses is MC34063A.External power supply is supplied with U2 pin 6 (VCC) after through capacitor C 3 filtering that are connected with ground.Be connected to pin 7 (I_SEN), pin 8 (DRV_C) and pin 1 (SW_C) through resistance R 2 again.The pin 3 (CAP) of U2 is through capacitor C 5 ground connection.The pin 2 (SW_E) of U2 sends current signal through reverse diode D10 ground connection, simultaneously through inductance L 4, resistance R 4 and resistance R 5 ground connection.Resistance R 4 is connected with the pin 5 (IN) of U2 with node between the resistance R 5.Node between inductance L 4 and the resistance R 4 is as the input of charhing unit 300, and through voltage-stabiliser tube D7 ground connection.
3. charhing unit 300
Charhing unit 300 comprises a battery charge chip, and the chip U3 model that present embodiment uses is CE4054.CE4054 is that a complete single-unit lithium ion battery adopts the linear charger of constant current/constant voltage.Its charging voltage is fixed in 4.2V, and charging current can be carried out outer setting through a resistor.When after charging current is reaching final float charge voltage, reducing to set point 1/10, CE4054 will stop charging cycle automatically.When input voltage was taken away, CE4054 got into a low current condition automatically, and battery drain stream is reduced to below the 2 μ A.Be connected to the pin 4 (VCC) of U3 by the voltage/current signals of charging feed unit 200 output, be the charger power supply, and carry out bypass through capacitor C 2.The pin 3 (BAT) of U3 is connected to battery 700, and when VCC reduced in the 30mV of pin 3 (BAT) pin voltage of U3, U3 got into shutdown mode, thereby makes I BATReduce to below the 2 μ A.The pin 5 (PROG) of U3 is for charging current is set, charging current is monitored and shut down pin.Between this pin and ground, be connected a precision and be 1% resistor R 6 and can set charging current.When under constant-current mode, charging, the voltage of this pin is maintained at 1V.In all patterns, can utilize the voltage on this pin to calculate charging current.This pin also can be used to turn-off charger.To set resistor and ground disconnecting, inner one 2.5 μ A electric current is pulled to high level with this pin.When the voltage of this pin reached the shutdown threshold voltage of 1.22V, charger got into shutdown mode, and charging stops and importing source current and reduce to 45 μ A, and again R6 being linked to each other with ground to make charger enabling state.
4. control unit 400
Said control unit 400 comprises control chip U1; The pin 3 (GP4) of said control chip U1 is connected with said voltage regulation unit 100 outputs through resistance R 24, and voltage regulation unit 100 outputs are through resistance R 7 ground connection; Voltage regulation unit 100 outputs are received the pin 1 (VDD) of U1 through rectifier diode D1, for U1 provides operating voltage; Battery is connected to the pin 1 (VDD) of U1 through diode D7 simultaneously, and through capacitor C 1 ground connection, is the U1 power supply when not having external power supply; U1 pin 5 (GP2) resistance R 12 through series connection and the normal bright switch J6 of stroboscopic successively is connected to the pin 1 (VDD) of U1; Node between the normal bright switch J6 of resistance R 12 and stroboscopic is through resistance R 11 ground connection; The pin 1 (VDD) of U1 is switch J2 and resistance R 14 ground connection through connecting successively; The node that switch J2 and resistance R are 14 is connected to the pin 6 (GP1) of U1 through resistance R 23.J2 is the switch of LED emergency light circuit supplied by wide voltage power supply, and the user can start emergency light through it.J6 is the normal bright switch of stroboscopic, and the user can select stroboscopic or normal bright pattern, and its pin 2 (GP5) through U3 is given LED driver element 500 through the normal bright control signal of resistance R 15 output stroboscopics.Voltage through detecting pin 3 (GP4) judges whether external wide voltage source; If have then pin 7 (GP0) output LED lamp control signal through U1 turn-offs the circuit that batteries 700 are given the chip U4 power supply of LED driver element 500 for LED driver element 500, and supply power for LED600 through peripheral circuit 900 by external power supply 800.
5.LED driver element 500
Said LED driver element 500 comprises constant-current driven chip U4, and it is QX7136 that present embodiment adopts the chip model.The base stage of triode Q8 is connected with the U4 pin 7 (GP0) of said control unit 400 through resistance R 20 in the LED driver element 500, receives LED lamp control signal, thereby opens or turn-off the circuit of battery 700 for chip U4 power supply; The collector electrode of triode Q8 is connected with the grid of metal-oxide-semiconductor Q3 through resistance R 37; The drain and gate of metal-oxide-semiconductor Q3 connects through resistance R 3; The drain electrode of metal-oxide-semiconductor Q3 is connected with the battery output, and its source electrode is connected to the pin 3 (VDD) of constant-current driven chip U4 through diode D3; It is anodal that the source electrode of metal-oxide-semiconductor Q3 is connected to the LED lamp through diode D8.The pin 5 (LED) of U4 is connected to LED lamp negative pole.The pin 2 (GND) of U4 is connected to the source electrode of metal-oxide-semiconductor Q6, and is connected to the pin 1 (CS) of U4 through resistance R 1; The grid of metal-oxide-semiconductor Q6 is connected to the pin 2 (GP5) of U3 through resistance R 15, receives the normal bright control signal of stroboscopic, the light-emitting mode of control LED.
Wide voltage according to the invention is supplied with the LED emergency light circuit and is divided into two kinds of mode of operations.When charge mode, the external wide voltage source 800 in J1 place is through being input to voltage regulation unit 100 and charging feed unit 200 after the diode D6 rectification.Charging feed unit 200 is supplied with charhing unit 300 through the burning voltage of direct current conversion output 6.2V as working power; Charhing unit 300 is realized the charging control to battery, as for battery 700 constant current being provided, thereby it is charged, and reaches certain degree at electric weight, and charging stops; 100 pairs of external wide voltage sources 800 of said voltage regulation unit carry out voltage stabilizing; The value that can regulate voltage regulation unit 100 output voltages through the parameter of regulating voltage stabilizing didoe D5; Forward voltage of voltage regulation like voltage stabilizing didoe D5 is 6.2V, if when the base voltage of said triode Q4 surpasses 6.2V, can pass through voltage regulation resistance R10 dividing potential drop; Make the voltage of base stage be stabilized in 6.2V, thereby the voltage of guaranteeing the emitter of triode Q4 is stabilized in 5.5V.When regulating transistor parameter, can realize any voltage output littler than input voltage.The voltage of output plays the effect of deburring through the filtering of filter capacitor C6, solves electromagnetic interference problem.Voltage regulation unit 100 output burning voltages supply control unit 400 to use.The U1 of control unit 400 judges whether to be high level through pin 3 (GP4); Be then to represent at present to supply power by external power supply; Battery is a charged state, therefore controls pin 7 (GP0) output low level signal, and the triode Q8 in the control LED driver element 500 turn-offs; Thereby metal-oxide-semiconductor Q3 is turn-offed, make battery stop U4 power supply for LED driver element 500.LED600 is directly supplied power through peripheral circuit 900 by external power supply.Simultaneously, no matter be that control unit 400 can both receive the information that the user turns on light and turns off the light through switch J2 under the charging or the pattern of discharge, thus control LED lamp on/off.Stroboscopic normal bright switch J6 can provide preference pattern for the user, through metal-oxide-semiconductor Q6 conducting and the shutoff in pin 2 (GP5) the control LED driver element 500 of U1, thus the light-emitting mode of control LED lamp.
When discharge condition, J1 does not connect wide voltage source 800, and therefore then charge feed unit 200 and the input of charhing unit 300 no currents are not battery 700 chargings; Said voltage regulation unit 100 does not also have input; Said control unit 400 provides operating voltage through rectifier diode D2 for it by battery; The U1 of control unit 400 judges that through pin 3 (GP4) it is a low level; Then represent no external power supply 800 at present; Be the LED power supply by battery 700, therefore control pin 7 (GP0) output high level signal, the triode Q8 conducting in the control LED driver element 500; Thereby make metal-oxide-semiconductor Q3 conducting, make that battery is the U4 power supply of LED driver element 500.U4 is that LED600 provides constant current, thereby makes LED600 normally luminous.

Claims (5)

1. a LED emergency light circuit supplied by wide voltage power supply is characterized in that, comprises voltage regulation unit (100), control unit (400) and LED driver element (500);
Said voltage regulation unit (100) links to each other with external power supply (800), and to its voltage stabilizing and filtering, output supplies said control unit (400) work; Said control unit (400) also is connected with battery (700), when not connecing external power supply (800), is supplied power by battery (700); Said control unit (400) judges that voltage regulation unit (100) has no current output, produces the switching control signal respectively and gives LED driver element (500); LED driver element (500) turn-offs the path that battery (700) is LED driver element (500) power supply when receiving the shutoff control signal, LED (600) is directly driven through peripheral circuit (900) by external power supply (800); LED driver element (500) is opened the path that battery (700) is LED driver element (500) power supply, by LED driver element (500) constant-current driving LED (600) when receiving the unlatching control signal;
Said voltage regulation unit (100) comprises rectifier diode (D6), voltage regulation resistance (R10), adjustment triode (Q4), voltage stabilizing didoe (D5) and filter capacitor (C6); Said adjustment triode (Q4) collector electrode links to each other with external power supply (800) through reverse rectifier diode (D6); Its base stage is through voltage stabilizing didoe (D5) ground connection; Its emitter is through filter capacitor (C6) ground connection, and its collector electrode links to each other through voltage regulation resistance (R10) with base stage; The emitter of said adjustment triode (Q4) is connected with LED driver element (500) input with said control unit (400) as voltage regulation unit (100) output, for it provides filtered burning voltage.
2. LED emergency light circuit supplied by wide voltage power supply according to claim 1 is characterized in that, also comprises charging feed unit (200) and charhing unit (300); Said charging feed unit (200) links to each other with external power supply (800), supplies with said charhing unit (300) through direct current conversion back battery (700) is charged.
3. LED emergency light circuit supplied by wide voltage power supply according to claim 2 is characterized in that, said charging feed unit (200) comprises the direct current conversion chip, and model is MC34063A.
4. LED emergency light circuit supplied by wide voltage power supply according to claim 2 is characterized in that, said charhing unit (300) comprises the battery charge chip, and model is CE4054.
5. LED emergency light circuit supplied by wide voltage power supply according to claim 1 is characterized in that, said LED driver element (500) comprises the LED constant-current driven chip, and model is QX7136.
CN2009101082741A 2009-06-24 2009-06-24 LED emergency light circuit supplied by wide voltage power supply CN101932153B (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103096564B (en) * 2011-11-02 2016-03-23 海洋王(东莞)照明科技有限公司 A kind of LED emergency luminaire and drive circuit thereof

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CN102510623B (en) * 2011-11-01 2014-06-18 深圳市讯宇创科技有限公司 Emergency light circuit and system
WO2013063761A1 (en) * 2011-11-01 2013-05-10 深圳市讯宇创科技有限公司 Emergency lamp circuit and system
GB201204106D0 (en) * 2012-03-08 2012-04-18 Tridonic Uk Ltd Lamp unit power supply system
CN103826348A (en) * 2012-11-16 2014-05-28 海洋王(东莞)照明科技有限公司 Lamp and auxiliary lighting circuit thereof
CN104066222B (en) * 2013-03-21 2016-09-07 海洋王(东莞)照明科技有限公司 Light fixture emergency supply circuit
CN103281821B (en) * 2013-04-17 2016-06-01 江杨金 Grid power blackout or artificial switch circuit breaking intelligent recognition power
CN105591448B (en) * 2016-01-07 2019-05-24 明华电子科技(惠州)有限公司 A kind of emergency light Lighting control detection system
CN108575030B (en) * 2017-03-14 2020-05-12 上海巍立智能科技有限公司 Portable lamp and control method thereof

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CN101131229A (en) * 2007-09-21 2008-02-27 陈志雄 Dual-purpose intelligent lamp

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Publication number Priority date Publication date Assignee Title
CN101131229A (en) * 2007-09-21 2008-02-27 陈志雄 Dual-purpose intelligent lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103096564B (en) * 2011-11-02 2016-03-23 海洋王(东莞)照明科技有限公司 A kind of LED emergency luminaire and drive circuit thereof

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