CN202587485U - Control circuit of waterproof LED electric torch - Google Patents
Control circuit of waterproof LED electric torch Download PDFInfo
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- CN202587485U CN202587485U CN 201220098360 CN201220098360U CN202587485U CN 202587485 U CN202587485 U CN 202587485U CN 201220098360 CN201220098360 CN 201220098360 CN 201220098360 U CN201220098360 U CN 201220098360U CN 202587485 U CN202587485 U CN 202587485U
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Abstract
The utility model discloses a control circuit of a waterproof LED electric torch. The circuit is composed of a DC constant current circuit, batteries, a PWN circuit, a single-chip microcomputer circuit, an auxiliary circuit and an LED lamp. Six 1.2V nickel-hydrogen batteries are adopted by the whole circuit, and the total capacity is 700mAH. Five shifts are employed, and two touch buttons are adopted to enhance or lower brightness of the lamp. The work current at the highest shift is allowed to be 700mA, the work current (70mA) at the lowest shift corresponds to the longest discharge time, and the brightness of the lamp can be selected based on needs. The work current of the lamp is set to at the medium shift after the circuit is started, and the current of the lamp is 350mA and the brightness is about 50%. When a voltage of the batteries drops to be 6V, power is cut off, and the quiescent current of the circuit is less than 50uA. A magnetic element (a magnetic reed tube) is adopted by a switch to control the lamp to be turned on or turned off, thereby prolonging the service life of the LED electric torch.
Description
Technical field:
The utility model relates to the LED flashlight, particularly a kind of New LED flashlight lighting control circuit.
Background technology:
At present, common LED flashlight standby power consumption amount is big, and the light modulation gear is few, and switch is a mechanical type, loose contact and damage easily, the design in order to overcome these deficiencies of this circuit.
The utility model content:
In view of above-mentioned technical problem, the utility model provides a kind of New LED flashlight lighting control circuit.This control circuit is regulated the LED lamp through being provided with from the light modulation gear of 70mA～700mA.And adopt magnetic reed switch to reduce to 6V at cell voltage, and the circuit quiescent current is less than 50uA, situation under the opening and shutting off of control lamp, prolong LED flashlight useful life with this.
The concrete technical scheme of the utility model is following:
The Waterproof LED flashlight control circuit is made up of DC charging constant-current circuit, battery, PWN circuit, single chip circuit, auxiliary circuit and LED lamp.Particular circuit configurations is following:
This circuit is provided with power supply B1, the resistance R 5 that is connected with power supply B1 and R6, isolated gate FET Q1, triode Q2, resistance R 3 and R4, electric capacity EC1 and step-down constant-current source U3; Said triode Q2 also is connected with capacitor C 1, resistance R 7 and R8; Said step-down constant-current source U3 also connects resistance R 1 and R2, capacitor C 8, diode D1, inductance L 1 and LED lamp;
Said circuit also is provided with single-chip microcomputer U1, and its PIN1 pin connects capacitor C 2, resistance R 11 and R12, magnetic reed switch K1; Its PIN4 pin connects resistance R 13 and power supply VCC; Capacitor C 9 is connected between PIN4 pin and the PIN5 pin; Resistance R 9 and capacitor C 3 are connected between PIN5 pin and the PIN6 pin; Resistance R 10 and capacitor C 5 are connected between PIN5 pin and the PIN7 pin; The PIN1 pin connects light contact dimmer switch K2, K3; PIN4, PIN5, PIN6 and PIN7 pin together are connected ground connection GND; The PIN9 pin connects step-down constant-current source U3; The PIN10 pin connects power supply VCC; Crystal oscillator is connected between PIN11 pin and the PIN12 pin; The PIN13 pin connects capacitor C 4, resistance R 3 and R4, ground connection GND; The PIN14 pin connects resistance R 7 and R8;
Said circuit also is provided with voltage stabilizing chip U2, is connected with electric capacity EC3, capacitor C 7, power supply VCC between its PIN1 pin and the PIN2 pin; Be connected with electric capacity EC2, capacitor C 6, ground connection GND between PIN1 pin and the PIN3 pin;
Said circuit also is provided with socket DC1, and the two ends of this socket connect charging indicator light LED1, resistance R 16 side by side, triode Q3, resistance R 18, resistance R 17, isolated gate FET Q4; Said isolated gate FET Q4 connects diode D2, also connects the PIN3 pin of voltage stabilizing chip U2.
As preferred version, it is the single-chip microcomputer of EM78P259 that said single-chip microcomputer U1 adopts model.
As preferred version, it is the chip of MD7350 that said voltage stabilizing chip U2 adopts model.
As preferred version, it is the isolated gate FET of AOD407 that said isolated gate FET Q1 adopts model.
As preferred version, said triode Q2 employing model is 3904 triode.
The described control circuit advantage of the utility model is: entire circuit adopts the Ni-MH battery power supply of 6 joint 1.2V, and capacity is 700mAH, is divided into 5 gears altogether, adopts two and touches the brightness that button increases or reduce lamp.Operating current is 700mA when supporting maximum, the long discharge time of operating current during deep low gear (70mA) correspondence, can select brightness as required.The operating current that starts back light is located at middle bay, and electric current is 350mA, and brightness is about 50%.When cell voltage reduces to 6V, cut off power supply, this circuit quiescent current is less than 50uA, and switch adopts opening and shutting off of magnetic element (magnetic red pipe) control lamp, prolongs LED flashlight useful life.
Description of drawings:
Further specify the utility model below in conjunction with accompanying drawing and embodiment.
Fig. 1 is the block diagram of the said control circuit of the utility model.
Fig. 2 is the circuit structure diagram of the said control circuit of the utility model.
Embodiment:
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, the described Waterproof LED flashlight control circuit of the utility model is made up of DC charging constant-current circuit 11, battery 12, PWN circuit 13, single chip circuit 16, auxiliary circuit 15 and LED lamp 14.
As shown in Figure 2, this circuit is provided with power supply B1, the resistance R 5 that is connected with power supply B1 and R6, isolated gate FET Q1, triode Q2, resistance R 3 and R4, electric capacity EC1 and step-down constant-current source U3; Said triode Q2 also is connected with capacitor C 1, resistance R 7 and R8; Step-down constant-current source U3 also connects resistance R 1 and R2, capacitor C 8, diode D1, inductance L 1 and LED lamp.
Circuit also is provided with single-chip microcomputer U1, and its PIN1 pin connects capacitor C 2, resistance R 11 and R12, magnetic reed switch K1; Its PIN4 pin connects resistance R 13 and power supply VCC; Capacitor C 9 is connected between PIN4 pin and the PIN5 pin; Resistance R 9 and capacitor C 3 are connected between PIN5 pin and the PIN6 pin; Resistance R 10 and capacitor C 5 are connected between PIN5 pin and the PIN7 pin; The PIN1 pin connects light contact dimmer switch K2, K3; PIN4, PIN5, PIN6 and PIN7 pin together are connected ground connection GND; The PIN9 pin connects step-down constant-current source U3; The PIN10 pin connects power supply VCC; Crystal oscillator is connected between PIN11 pin and the PIN12 pin; The PIN13 pin connects capacitor C 4, resistance R 3 and R4, ground connection GND; The PIN14 pin connects resistance R 7 and R8;
Circuit also is provided with voltage stabilizing chip U2, is connected with electric capacity EC3, capacitor C 7, power supply VCC between its PIN1 pin and the PIN2 pin; Be connected with electric capacity EC2, capacitor C 6, ground connection GND between PIN1 pin and the PIN3 pin;
Circuit also is provided with socket DC1, and the two ends of this socket connect charging indicator light LED1, resistance R 16 side by side, triode Q3, resistance R 18, resistance R 17, isolated gate FET Q4; Said isolated gate FET Q4 connects diode D2, also connects the PIN3 pin of voltage stabilizing chip U2.
The said circuit of the utility model also possesses following characteristics:
(1) single chip circuit U1 (EM78P259) is a product operation control centre;
(2) U2 (MD7350) voltage stabilizing chip is that circuit provides 5V voltage-stabilizing power supply;
(3) U3 (PT4115) is the step-down constant-current source of a continuous electric inducing current conduction mode, is used to drive a LED lamp.And can accept the PWM light modulation of wide range through the PIN3 pin.
(4) Q3 and Q4 have formed a constant-current source circuit, and to battery (B1) constant-current constant-voltage charging, continuous current is 120mA.
The principle of this circuit is following:
Entire circuit is through the external DC of DC1 socket (direct current) 12V, and charging indicator light LED1 is bright, through after Q3 and the Q4 constant current battery B1 being charged.When magnetic reed switch (K1) triggers; The VCC voltage (5V) that U2 (MD7350) produce to produce has been added to the PIN1 of single-chip microcomputer U1 (EM78P259) through magnetic reed switch (K1) moment; When PIN1 detects high level; The PIN14 pin is also exported high level and is made Q2 (3904) conducting, thereby the G pole tension of Q1 (AOD407) MOS is dragged down, and also makes the Q1MOS conducting.The voltage of battery (B1) flows to U3 (PT4115) constant-flow driver through Q1, thereby the LED lamp is lighted.If click magnetic reed switch (K1) once more when triggering, also just turn-off LED and go out.
In addition, have the brightness that 5 gears are regulated the LED lamp, brightness is about centre 50% after the LED lamp is lighted, and clicks light contact-making switch (K2) brightness and is increased to about 75%, clicks brightness again and just is maximum 100%.Just turn down by light contact-making switch (K3),, drop to brightness about 10% at last for minimum successively from 100%-75%-50%-30%-10%.Because the PIN6 of single-chip microcomputer U1 (EM78P259) and PIN7 detect high level one time, the PIN3 pulsewidth of U3 (PT4115) is just adjusted in PIN9 output, thereby reaches the purpose of regulating brightness.When the PIN13 of single-chip microcomputer U1 (EM78P259) detected voltage and is 6V, PIN14 turn-offed with regard to output low level Q2 and Q1, under-voltage protection at this moment, and the LED lamp goes out, and at this moment needs just reusing after the battery charge.
More than show and described basic principle of the utility model and the advantage of principal character and the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection range to be defined by appending claims and equivalent thereof.
Claims (5)
1. the Waterproof LED flashlight control circuit is characterized in that, said circuit is provided with power supply B1, the resistance R 5 that is connected with power supply B1 and R6, isolated gate FET Q1, triode Q2, resistance R 3 and R4, electric capacity EC1 and step-down constant-current source U3; Said triode Q2 also is connected with capacitor C 1, resistance R 7 and R8; Said step-down constant-current source U3 also connects resistance R 1 and R2, capacitor C 8, diode D1, inductance L 1 and LED lamp;
Said circuit also is provided with single-chip microcomputer U1, and its PIN1 pin connects capacitor C 2, resistance R 11 and R12, magnetic reed switch K1; Its PIN4 pin connects resistance R 13 and power supply VCC; Capacitor C 9 is connected between PIN4 pin and the PIN5 pin; Resistance R 9 and capacitor C 3 are connected between PIN5 pin and the PIN6 pin; Resistance R 10 and capacitor C 5 are connected between PIN5 pin and the PIN7 pin; The PIN1 pin connects light contact dimmer switch K2, K3; PIN4, PIN5, PIN6 and PIN7 pin together are connected ground connection GND; The PIN9 pin connects step-down constant-current source U3; The PIN10 pin connects power supply VCC; Crystal oscillator is connected between PIN11 pin and the PIN12 pin; The PIN13 pin connects capacitor C 4, resistance R 3 and R4, ground connection GND; The PIN14 pin connects resistance R 7 and R8;
Said circuit also is provided with voltage stabilizing chip U2, is connected with electric capacity EC3, capacitor C 7, power supply VCC between its PIN1 pin and the PIN2 pin; Be connected with electric capacity EC2, capacitor C 6, ground connection GND between PIN1 pin and the PIN3 pin;
Said circuit also is provided with socket DC1, and the two ends of this socket connect charging indicator light LED1, resistance R 16 side by side, triode Q3, resistance R 18, resistance R 17, isolated gate FET Q4; Said isolated gate FET Q4 connects diode D2, also connects the PIN3 pin of voltage stabilizing chip U2.
2. according to the Waterproof LED flashlight control circuit of claim 1, it is characterized in that it is the single-chip microcomputer of EM78P259 that said single-chip microcomputer U1 adopts model.
3. according to the Waterproof LED flashlight control circuit of claim 1, it is characterized in that it is the chip of MD7350 that said voltage stabilizing chip U2 adopts model.
4. according to the Waterproof LED flashlight control circuit of claim 1, it is characterized in that it is the isolated gate FET of AOD407 that said isolated gate FET Q1 adopts model.
5. according to the Waterproof LED flashlight control circuit of claim 1, it is characterized in that said triode Q2 employing model is 3904 triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220098360 CN202587485U (en) | 2012-03-15 | 2012-03-15 | Control circuit of waterproof LED electric torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220098360 CN202587485U (en) | 2012-03-15 | 2012-03-15 | Control circuit of waterproof LED electric torch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202587485U true CN202587485U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220098360 Expired - Fee Related CN202587485U (en) | 2012-03-15 | 2012-03-15 | Control circuit of waterproof LED electric torch |
Country Status (1)
| Country | Link |
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| CN (1) | CN202587485U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625531A (en) * | 2012-03-15 | 2012-08-01 | 无锡市威德盛电子有限公司 | Control circuit of waterproof LED (Light Emitting Diode) flashlight |
-
2012
- 2012-03-15 CN CN 201220098360 patent/CN202587485U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102625531A (en) * | 2012-03-15 | 2012-08-01 | 无锡市威德盛电子有限公司 | Control circuit of waterproof LED (Light Emitting Diode) flashlight |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20140315 |