CN219960877U - Flashlight driving circuit - Google Patents
Flashlight driving circuit Download PDFInfo
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- CN219960877U CN219960877U CN202320994504.4U CN202320994504U CN219960877U CN 219960877 U CN219960877 U CN 219960877U CN 202320994504 U CN202320994504 U CN 202320994504U CN 219960877 U CN219960877 U CN 219960877U
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- 230000002238 attenuated effect Effects 0.000 abstract description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a flashlight driving circuit which comprises a battery pack, a voltage stabilizing circuit, a driving circuit, a control circuit and a detection circuit, wherein the voltage stabilizing circuit and the driving circuit are respectively connected with the control circuit; the battery pack is connected with the voltage stabilizing circuit, and the battery pack outputs working voltage and power supply voltage through the voltage stabilizing circuit after being output, and the power supply voltage supplies power for the control circuit and the detection circuit; the driving circuit is connected with the multi-path LED light-emitting circuit, and the working voltage supplies power for the LED light-emitting circuit through the driving circuit; the control circuit is connected with the detection circuit, a temperature detection element for detecting the temperature of the battery pack is arranged on the detection circuit, the detection circuit transmits a temperature signal detected by the temperature detection element to the control circuit, and the control circuit sends an electric signal to control whether the driving circuit works or not. The function of detecting the state of the battery pack is additionally arranged in the circuit, so that the battery pack is prevented from forcedly working under a severe state, and the service life of the battery pack is prevented from being attenuated.
Description
Technical Field
The utility model relates to the field of lighting technology, in particular to a flashlight driving circuit.
Background
The flashlight is a hand-held electronic lighting tool. A typical flashlight has a bulb and focusing mirror powered by a battery and has a handle housing for hand-held use. It has the characteristics of centralized light and long range, and people can generally use the flashlight to illuminate at night or in dark places.
In the prior art, because the basic function of the flashlight only needs to emit light through the light-emitting element, the flashlight only needs to be electrified, and therefore, a driving circuit of the flashlight with the basic function is simple, for example, an ultra-low pressure difference LED flashlight in China patent application; application number: CN201510650085.2; disclosed is a method comprising: 2.7-6V direct current power supply, ultra-low voltage difference current stabilizing circuit, light emitting elements LED 2-LED 4 and battery working state indicating circuit; in the ultra-low pressure difference current stabilizing circuit, the model of the ultra-low pressure difference current stabilizer IC1 is AMC7135. In order to overcome the defects of large volume, high power consumption and low brightness of an ordinary battery incandescent lamp flashlight, the ultra-low voltage difference LED flashlight adopts a special ultra-low voltage difference LED driving integrated circuit (AMC 7135), and 3 high-brightness white light emitting diodes can be lightened by a lithium battery. The technical scheme can also be applied to miner lamps, emergency lighting, solar power supply lighting and the like.
Of course, there are also many commercial flashlights with only lighting functions, and additional functions are designed on the driving circuit of the flashlight. Related patents such as China patent application "a flashlight circuit", application number: CN201310628277.4; the utility model discloses a including main control chip, triode, LED lamp, GPS module, bleeder resistor, group battery, warning light, temperature sensor, relay and display module, wherein: the PWM output end of the main control chip is connected with the base electrode of the triode, the emitting electrode of the triode is connected with the anode of the LED lamp, the GPS signal receiving end of the main control chip is connected with the GPS module, the first input end of the main control chip is connected with the LED lamp key, the second input end of the main control chip is connected with the GPS key, the output end of the main control chip is connected with the display module, the sampling end of the main control chip is connected with the battery pack through a voltage dividing resistor, and the driving end of the main control chip is connected with the warning lamp, the temperature sensor and the relay.
In order to meet the increasing outdoor entertainment demands of users, the electric torch on the market is higher and higher in power and portability, and the corresponding volume is smaller. However, high-power components are concentrated on a flashlight with a small volume, so that the heat dissipation effect of the flashlight is limited. Especially in hot summer, the battery pack is easy to damage after continuous operation. In addition, it is not excluded that the battery pack of the flashlight is in other unsuitable states, and if the flashlight works limitlessly, the failure speed of the battery pack is increased, and the service life is shortened.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a flashlight driving circuit, wherein a function of detecting the state of a battery pack is additionally arranged in the circuit, so that the battery pack is prevented from forcedly working under a severe state, and the service life of the battery pack is prevented from being attenuated.
The utility model adopts the technical scheme that: a flashlight driving circuit comprises a battery pack, a voltage stabilizing circuit, a driving circuit, a control circuit and a detection circuit, wherein the voltage stabilizing circuit and the driving circuit are respectively connected with the control circuit;
the battery pack is connected with the voltage stabilizing circuit, and the battery pack outputs working voltage and power supply voltage through the voltage stabilizing circuit after being output, and the power supply voltage supplies power for the control circuit and the detection circuit;
the driving circuit is connected with the multi-path LED light-emitting circuit, and the working voltage supplies power for the LED light-emitting circuit through the driving circuit;
the control circuit is connected with the detection circuit, a temperature detection element for detecting the temperature of the battery pack is arranged on the detection circuit, the detection circuit transmits a temperature signal detected by the temperature detection element to the control circuit, and the control circuit sends an electric signal to control whether the driving circuit works or not.
Compared with the prior art, the utility model has the advantages that the control circuit and the detection circuit are additionally arranged besides the driving circuit for driving the LED light-emitting circuit to work, the detection circuit is adopted to monitor the surface temperature of the battery pack, and the temperature signal is converted into an electric signal and is transmitted to the control circuit. The corresponding control circuit is connected with the driving circuit, when the control circuit judges that the state of the battery pack is unsuitable for working according to preset information, the driving circuit is disconnected or not started, and the LED light-emitting circuit does not work and enters a shutdown protection state, so that unnecessary attenuation of the battery pack can be effectively avoided, and the service life of the battery pack is prolonged.
In addition, in order to ensure stable and reliable operation, the utility model is provided with a voltage stabilizing circuit, the battery pack is connected with the voltage stabilizing circuit, and the working voltage for the LED light-emitting circuit to work and the power supply voltage for the control circuit and the detection circuit to work are output after passing through the voltage stabilizing circuit. The battery pack is used for providing voltages with two different specifications, and the normal operation of the whole flashlight is realized.
In some embodiments of the present utility model, the control circuit includes a control chip with a model FT61F133A and a control button, one end of the control button is grounded, the other end of the control button is connected to a fifth pin of the control chip, and the first pin and the fifth pin of the control chip are respectively connected to a power supply voltage. Specifically, in the present utility model, the power supply voltage outputted from the voltage stabilizing circuit is 5V.
In some embodiments of the present utility model, the detection circuit includes a seventh MOS transistor and a temperature detection element, a gate of the seventh MOS transistor is connected to a sixth pin of the control chip, a source of the seventh MOS transistor is connected to a fourteenth pin of the control chip, and a drain of the seventh MOS transistor is connected to a supply voltage through the temperature detection element.
Specifically, the temperature sensing element in the present utility model employs a temperature sensing resistor. The temperature detecting element detects the temperature of the battery pack, converts the temperature signal into an electric signal and transmits the electric signal to the control circuit.
In some embodiments of the present utility model, the voltage stabilizing circuit includes a voltage stabilizer, a power input terminal of the voltage stabilizer is connected with an anode terminal of the battery pack, a ground terminal of the voltage stabilizer is connected with a cathode terminal of the battery pack, a ground terminal of the voltage stabilizer is grounded, an output terminal of the voltage stabilizer outputs a supply voltage, and an anode terminal of the battery pack outputs an operating voltage. The operating voltage in the present utility model is 20V.
In some embodiments of the present utility model, the voltage stabilizing circuit includes a fifth resistor, a sixth resistor and a seventh resistor, where the fifth resistor and the sixth resistor are connected in series and then connected in parallel to two ends of the battery pack, one end of the seventh resistor is connected between the fifth resistor and the sixth resistor, and the other end of the seventh resistor is connected with a thirteenth pin of the control chip.
In some embodiments of the present utility model, the driving circuit includes a second MOS transistor, a third MOS transistor, a fourth MOS transistor, and a driving chip, where a gate of the second MOS transistor and a gate of the third MOS transistor are connected, a source of the second MOS transistor and a source of the third MOS transistor are connected, a drain of the second MOS transistor is connected to a working voltage, and a drain of the third MOS transistor is connected to the driving chip.
In some embodiments of the present utility model, a source electrode of the fourth MOS transistor is connected to a gate electrode of the second MOS transistor, a source electrode of the fourth MOS transistor is connected to a source electrode of the second MOS transistor, a drain electrode of the fourth MOS transistor is grounded, and a gate electrode of the fourth MOS transistor is connected to an eleventh pin of the control chip.
In some embodiments of the present utility model, the driving chip is a chip with a model TAC5241, a third pin of the driving chip is connected with a drain electrode of the third MOS transistor, the third pin of the driving chip is connected with one end of the first inductor through the zener diode, a fifth pin of the driving chip is connected with a gate electrode of the first MOS transistor, a source electrode of the first MOS transistor is connected with one end of the first inductor, the other end of the first inductor is connected with the multiple LED light emitting circuits respectively, and the first pin of the driving chip is connected with the multiple LED light emitting circuits respectively.
In some embodiments of the present utility model, three LED lighting circuits are included, in which the connection structures of the electronic components are identical.
In some embodiments of the present utility model, the LED lighting circuit includes an eight-pin MOS transistor and a light emitting diode, the eight-pin MOS transistor is connected to the first pin of the driving chip, the eight-pin MOS transistor is connected to the control chip, the positive terminal of the light emitting diode is connected to the eight-pin MOS transistor, and the negative terminal of the light emitting diode is connected to the other terminal of the first inductor.
The above embodiments may be arbitrarily combined on the basis of common knowledge in the art.
Drawings
The utility model will be described in further detail below in connection with the drawings and the preferred embodiments, but it will be appreciated by those skilled in the art that these drawings are drawn for the purpose of illustrating the preferred embodiments only and thus should not be taken as limiting the scope of the utility model. Moreover, unless specifically indicated otherwise, the drawings are merely schematic representations, not necessarily to scale, of the compositions or constructions of the described objects and may include exaggerated representations.
FIG. 1 shows a voltage stabilizing circuit, a control circuit and a detection circuit in the present utility model;
fig. 2 shows a driving circuit and an LED lighting circuit according to the present utility model.
Wherein, the reference numerals specifically explain as follows: u1, a control chip; u2, a voltage stabilizer; u3, a driving chip; k1, a control button; r30, a temperature detecting element; r5, a fifth resistor; r6, a sixth resistor; r7, a seventh resistor; Q1B, a first MOS tube; q2, a second MOS tube; q3, a third MOS tube; q4, a fourth MOS tube; q7, a seventh MOS tube; Q5B/Q6B/Q8B, eight-pin MOS tube; L17/L18/L19, light emitting diode.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
A flashlight driving circuit according to an embodiment is shown in fig. 1 to 2: the device comprises a battery pack, a voltage stabilizing circuit, a driving circuit, a control circuit and a detection circuit, wherein the voltage stabilizing circuit and the driving circuit are respectively connected with the control circuit; the driving circuit is connected with the multi-path LED light-emitting circuit, and the working voltage supplies power for the LED light-emitting circuit through the driving circuit;
the battery pack is connected with the voltage stabilizing circuit, and the battery pack outputs working voltage and power supply voltage through the voltage stabilizing circuit after being output, and the power supply voltage supplies power for the control circuit and the detection circuit; the LED light-emitting device is provided with a voltage stabilizing circuit, a battery pack is connected with the voltage stabilizing circuit, and working voltage for the LED light-emitting circuit to work and power supply voltage for the control circuit and the detection circuit to work are output after passing through the voltage stabilizing circuit. The battery pack is used for providing voltages with two different specifications, and the normal operation of the whole flashlight is realized.
The control circuit is connected with the detection circuit, the detection circuit is provided with a temperature detection element R30 for detecting the temperature of the battery pack, the detection circuit transmits a temperature signal detected by the temperature detection element R30 to the control circuit, and the control circuit sends an electric signal to control whether the driving circuit works. The utility model is additionally provided with a control circuit and a detection circuit, the detection circuit is adopted to monitor the surface temperature of the battery pack, and the temperature signal is converted into an electric signal and is transmitted to the control circuit. The corresponding control circuit is connected with the driving circuit, when the control circuit judges that the state of the battery pack is unsuitable for working according to preset information, the driving circuit is disconnected or not started, and the LED light-emitting circuit does not work and enters a shutdown protection state, so that unnecessary attenuation of the battery pack can be effectively avoided, and the service life of the battery pack is prolonged.
In the second embodiment, as shown in fig. 1 to 2, the control circuit includes a control chip U1 with a model FT61F133A and a control button K1, one end of the control button K1 is grounded, the other end of the control button K1 is connected to a fifth pin of the control chip U1, and a first pin and a fifth pin of the control chip U1 are respectively connected to a supply voltage. Specifically, in the present utility model, the power supply voltage outputted from the voltage stabilizing circuit is 5V.
The detection circuit comprises a seventh MOS tube Q7 and a temperature detection element R30, wherein a grid electrode of the seventh MOS tube Q7 is connected with a sixth pin of the control chip U1, a source electrode of the seventh MOS tube Q7 is connected with a fourteenth pin of the control chip U1, and a drain electrode of the seventh MOS tube Q7 is connected with a power supply voltage through the temperature detection element R30. Specifically, in the present utility model, the temperature detection element R30 employs a temperature sensing resistor. The temperature detection element R30 detects the temperature of the battery pack, converts the temperature signal into an electrical signal, and transmits the electrical signal to the control circuit.
The voltage stabilizing circuit comprises a voltage stabilizer U2, a power input end of the voltage stabilizer U2 is connected with the positive electrode end of the battery pack, a grounding end of the voltage stabilizer U2 is connected with the negative electrode end of the battery pack, the grounding end of the voltage stabilizer U2 is grounded, the output end of the voltage stabilizer U2 outputs power supply voltage, and the positive electrode end of the battery pack outputs working voltage. The operating voltage in the present utility model is 20V.
The voltage stabilizing circuit comprises a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7, wherein the fifth resistor R5 and the sixth resistor R6 are connected in series and then connected in parallel at two ends of the battery pack, one end of the seventh resistor R7 is connected between the fifth resistor R5 and the sixth resistor R6, and the other end of the seventh resistor R7 is connected with a thirteenth pin of the control chip U1.
The driving circuit comprises a second MOS tube Q2, a third MOS tube Q3, a fourth MOS tube Q4 and a driving chip U3, wherein the grid electrode of the second MOS tube Q2 and the grid electrode of the third MOS tube Q3 are connected, the source electrode of the second MOS tube Q2 and the source electrode of the third MOS tube Q3 are connected, the drain electrode of the second MOS tube Q2 is connected with the working voltage, and the drain electrode of the third MOS tube Q3 is connected with the driving chip U3.
The source electrode of the fourth MOS tube Q4 is connected with the grid electrode of the second MOS tube Q2, the source electrode of the fourth MOS tube Q4 is connected with the source electrode of the second MOS tube Q2, the drain electrode of the fourth MOS tube Q4 is grounded, and the grid electrode of the fourth MOS tube Q4 is connected with the eleventh pin of the control chip U1.
The driving chip U3 is a chip with the model number TAC5241, a third pin of the driving chip is connected with a drain electrode of the third MOS tube Q3, the third pin of the driving chip U3 is connected with one end of the first inductor through a voltage-stabilizing diode, a fifth pin of the driving chip U3 is connected with a grid electrode of the first MOS tube Q1B, a source electrode of the first MOS tube Q1B is connected with one end of the first inductor, the other end of the first inductor is connected with the multi-path LED light-emitting circuit respectively, and the first pin of the driving chip U3 is connected with the multi-path LED light-emitting circuit respectively.
The LED light-emitting device comprises three LED light-emitting circuits, wherein the connection structures of electronic components in the three LED light-emitting circuits are identical. The LED light-emitting circuit comprises eight-pin MOS tubes Q5B, Q, 6 and B, Q B and light-emitting diodes L17, L18 and L19, wherein the eight-pin MOS tube Q5B, Q, 6 and B, Q B is connected with a first pin of a driving chip U3, the eight-pin MOS tube Q5B, Q, 6 and B, Q B is connected with a control chip U1, the positive ends of the light-emitting diodes L17, L18 and L19 are connected with the eight-pin MOS tube Q5B, Q, 6 and B, Q B, and the negative ends of the light-emitting diodes L17, L18 and L19 are connected with the other end of the first inductor.
The other contents of the second embodiment are the same as those of the first embodiment.
The foregoing has outlined rather broadly the more detailed description of the utility model in order that the detailed description of the utility model that follows may be better understood, and in order that the present utility model may be better understood. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Claims (10)
1. The flashlight driving circuit is characterized by comprising a battery pack, a voltage stabilizing circuit, a driving circuit, a control circuit and a detection circuit, wherein the voltage stabilizing circuit and the driving circuit are respectively connected with the control circuit;
the battery pack is connected with the voltage stabilizing circuit, and the battery pack outputs working voltage and power supply voltage through the voltage stabilizing circuit after being output, and the power supply voltage supplies power for the control circuit and the detection circuit;
the driving circuit is connected with the multi-path LED light-emitting circuit, and the working voltage supplies power for the LED light-emitting circuit through the driving circuit;
the control circuit is connected with the detection circuit, a temperature detection element for detecting the temperature of the battery pack is arranged on the detection circuit, the detection circuit transmits a temperature signal detected by the temperature detection element to the control circuit, and the control circuit sends an electric signal to control whether the driving circuit works or not.
2. The flashlight of claim 1, wherein the control circuit comprises a control chip of model FT61F133A and a control button, one end of the control button is grounded, the other end of the control button is connected to a fifth pin of the control chip, and the first pin and the fifth pin of the control chip are respectively connected to a power supply voltage.
3. The flashlight driving circuit according to claim 2, wherein the detecting circuit comprises a seventh MOS transistor and a temperature detecting element, a gate of the seventh MOS transistor is connected to a sixth pin of the control chip, a source of the seventh MOS transistor is connected to a fourteenth pin of the control chip, and a drain of the seventh MOS transistor is connected to the power supply voltage through the temperature detecting element.
4. The flashlight of claim 2, wherein the voltage stabilizing circuit comprises a voltage stabilizer, wherein a power input terminal of the voltage stabilizer is connected with a positive terminal of the battery pack, a ground terminal of the voltage stabilizer is connected with a negative terminal of the battery pack, the ground terminal of the voltage stabilizer is grounded, an output terminal of the voltage stabilizer outputs a power supply voltage, and a positive terminal of the battery pack outputs an operating voltage.
5. The flashlight driving circuit as claimed in claim 2 or 4, wherein said voltage stabilizing circuit comprises a fifth resistor, a sixth resistor and a seventh resistor, said fifth resistor and said sixth resistor are connected in series and then connected in parallel to two ends of the battery pack, one end of said seventh resistor is connected between said fifth resistor and said sixth resistor, and the other end of said seventh resistor is connected to a thirteenth pin of the control chip.
6. The flashlight driving circuit according to claim 2, wherein the driving circuit comprises a second MOS tube, a third MOS tube, a fourth MOS tube and a driving chip, wherein the grid electrode of the second MOS tube and the grid electrode of the third MOS tube are connected, the source electrode of the second MOS tube and the source electrode of the third MOS tube are connected, the drain electrode of the second MOS tube is connected with the working voltage, and the drain electrode of the third MOS tube is connected with the driving chip.
7. The flashlight driving circuit of claim 6, wherein the source of the fourth MOS tube is connected to the gate of the second MOS tube, the source of the fourth MOS tube is connected to the source of the second MOS tube, the drain of the fourth MOS tube is grounded, and the gate of the fourth MOS tube is connected to the eleventh pin of the control chip.
8. The flashlight driving circuit according to claim 6 or 7, wherein the driving chip is a chip with a model TAC5241, a third pin of the driving chip is connected with a drain electrode of the third MOS transistor, the third pin of the driving chip is connected with one end of the first inductor through a zener diode, a fifth pin of the driving chip is connected with a gate electrode of the first MOS transistor, a source electrode of the first MOS transistor is connected with one end of the first inductor, the other end of the first inductor is connected with the multi-path LED light-emitting circuits, and the first pin of the driving chip is connected with the multi-path LED light-emitting circuits.
9. The flashlight of claim 8, comprising three LED lighting circuits, wherein the electronic components of the three LED lighting circuits are identical in connection.
10. The flashlight of claim 9, wherein the LED lighting circuit comprises an eight-pin MOS transistor and a light emitting diode, the eight-pin MOS transistor is connected to the first pin of the driving chip, the eight-pin MOS transistor is connected to the control chip, the positive terminal of the light emitting diode is connected to the eight-pin MOS transistor, and the negative terminal of the light emitting diode is connected to the other terminal of the first inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320994504.4U CN219960877U (en) | 2023-04-27 | 2023-04-27 | Flashlight driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320994504.4U CN219960877U (en) | 2023-04-27 | 2023-04-27 | Flashlight driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219960877U true CN219960877U (en) | 2023-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320994504.4U Active CN219960877U (en) | 2023-04-27 | 2023-04-27 | Flashlight driving circuit |
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| Country | Link |
|---|---|
| CN (1) | CN219960877U (en) |
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2023
- 2023-04-27 CN CN202320994504.4U patent/CN219960877U/en active Active
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