CN209787518U - EL lamp strip control circuit - Google Patents
EL lamp strip control circuit Download PDFInfo
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- CN209787518U CN209787518U CN201822196140.7U CN201822196140U CN209787518U CN 209787518 U CN209787518 U CN 209787518U CN 201822196140 U CN201822196140 U CN 201822196140U CN 209787518 U CN209787518 U CN 209787518U
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Abstract
The utility model discloses an EL lamp strip control circuit, include the power protection circuit who is connected with the USB switch electricity, with the detection circuitry that charges that the power protection circuit electricity is connected and with the self-excited oscillation boost circuit that the detection circuitry electricity is connected charges. Compared with the related art, the EL lamp strip control circuit has the advantages of full charging and strong controllability and stability.
Description
Technical Field
The utility model belongs to the technical field of power electronic equipment, especially, relate to an EL lamp strip control circuit.
background
the cold light lamp is a cold light plate which adopts the main light source material in the future of the 21 st century. Luminescence (EL), known as Electro luminescence, is a phenomenon of converting electrical energy into light energy, combines a plurality of substances to produce a light source, and is a low-temperature light source that does not generate heat during operation. Because the LED lamp is small in power, high in illumination, good in color temperature and basically free of heat energy during light emitting, people also have a name for energy conservation and health: "Green light". In modern times it is applied to every field of society and enters every family at an extremely fast speed.
in the prior art, an EL lamp is usually driven by high voltage generated by a chip, but the charging cannot be saturated and the stability is poor under the condition of a charging indicator lamp.
Therefore, there is a need to provide a new type of EL light bar control circuit to overcome the above-mentioned drawbacks of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an EL lamp strip control circuit is provided, this EL lamp strip control circuit charges fully, and controllability and stability are stronger.
The technical solution of the utility model is as follows:
an EL lamp strip control circuit comprises a power supply protection circuit electrically connected with a USB switch, a charging detection circuit electrically connected with the power supply protection circuit, and a self-oscillation boosting circuit electrically connected with the charging detection circuit;
The power protection circuit comprises a power protection chip U2, a power management chip U3, a resistor R2, a resistor R5, a resistor R6, a diode D1, a capacitor C1 and a capacitor C2; the charging detection circuit comprises a triode Q2, a diode D2, a resistor R3 and a resistor R4; the self-oscillation boosting circuit comprises a control chip U1, a resistor R7, a resistor R8, a capacitor C4, a capacitor C5, a transformer T and a triode Q3;
A first pin of the control chip U1 is connected to one end of the resistor R2, which is far away from the diode D1, a second pin of the control chip U1 is idle, a third pin of the control chip U1 is connected to a USB switch through the resistor R1, a fourth pin of the control chip U1 is connected to the resistor R4, a fifth pin of the control chip U1 is connected to a charging prompt output lamp through a resistor R9, a sixth pin of the control chip U1 is idle, a seventh pin of the control chip U1 is connected to the resistor R7, an eighth pin of the control chip U1 is grounded, and the eighth pin of the control chip is connected to the first pin of the control chip U1 through the capacitor C3;
triode Q3 is the PNP type, the keeping away from of resistance R7 control chip U1 one end with resistance R8 is connected, another termination of resistance R8 triode Q3's base, triode Q3's emitter connects transformer T, triode Q3's collecting electrode ground connection, triode Q3's base is passed through electric capacity C4 connects triode Q3's collecting electrode, transformer T passes through electric capacity C5 connects resistance R7 respectively with resistance R8, transformer T still connects EL lamp strip respectively with resistance R2.
Further, the transformer T is a three-phase winding transformer, the transformer T includes a first winding L1, a second winding L2, and a third winding L3, the first winding L1 and the second winding L2 are primary sides of the transformer T, the third winding L3 is a secondary side of the transformer T, a synonym end of the first winding L1 is connected to the resistor R2, a synonym end of the first winding L1 is connected in series with a synonym end of the second winding L2, a synonym end of the first winding L1 is connected to an emitter of the triode Q3, a synonym end of the second winding L2 and a synonym end of the third winding L3 are connected to the capacitor C5, and a synonym light bar EL end of the third winding L3 is connected to the capacitor C5.
Furthermore, the anode of the diode D1 is connected to a USB switch, the cathode of the diode D1 is connected to the resistor R2, the resistor R2 is connected to the resistor R5, and the resistor R5 is connected to the second pin of the power protection chip U2;
a first pin of the power protection chip U2 is unloaded, a third pin of the power protection chip U2 is grounded, a second pin and a third pin of the power protection chip U2 are connected through the capacitor C1, a fourth pin of the power protection chip U2 is connected with a third pin of the power management chip U3, a fourth pin and a second pin of the power protection chip U2 are connected through the capacitor C2, a fifth pin of the power protection chip U2 is grounded through the resistor R6, and a sixth pin of the power protection chip U2 is connected with the first pin of the power management chip U3;
the second pin and the fifth pin of the power management chip U3 are in short circuit, and the fourth pin and the sixth pin of the power management chip U3 are both grounded.
Further, triode Q2 is the PNP type, the projecting pole of triode Q2 connects the USB switch, triode Q2's base is connected diode D2's positive pole, diode D2's negative pole connects resistance R2 with the one end that resistance R5 connects, triode Q2's collecting electrode passes through resistance R3 ground connection, resistance R4 one end is connected triode Q2's collecting electrode, the other end connects the fourth foot of control chip U1.
Further, the model of the control chip U1 is MCUSOP 8.
Further, the model of the power protection chip U2 is DW01DSOT 236.
Further, the model of the power management chip U3 is 8205SOT 236.
Has the advantages that:
The utility model discloses a EL lamp strip control circuit is through adopting self-excited oscillation boost circuit drive EL lamp, and stability is good, and drive efficiency is high, adopts the external suggestion output lamp that charges of control chip control to charge the suggestion for the charged state reaches the saturation, simple structure, easy to maintain, and controllability is strong.
Drawings
fig. 1 is a schematic structural diagram of an EL light bar control circuit.
Reference numerals: the power protection circuit comprises a power protection chip U2, a power management chip U3, a resistor R2, a resistor R5, a resistor R6, a diode D1, a capacitor C1, a capacitor C2, a triode Q2, a diode D2, a resistor R3, a resistor R4, a control chip U1, a resistor R7, a resistor R8, a capacitor C4, a capacitor C5, a transformer T and a triode Q3.
Detailed Description
the invention will be described in further detail with reference to the following figures and specific embodiments:
Example 1: as shown in fig. 1, the EL light bar control circuit comprises a power supply protection circuit electrically connected with a USB switch, a charging detection circuit electrically connected with the power supply protection circuit, and a self-oscillation boosting circuit electrically connected with the charging detection circuit;
The power protection circuit comprises a power protection chip U2, a power management chip U3, a resistor R2, a resistor R5, a resistor R6, a diode D1, a capacitor C1 and a capacitor C2; the charging detection circuit comprises a triode Q2, a diode D2, a resistor R3 and a resistor R4; the self-oscillation boosting circuit comprises a control chip U1, a resistor R7, a resistor R8, a capacitor C4, a capacitor C5, a transformer T and a triode Q3;
a first pin of the control chip U1 is connected to one end of the resistor R2, which is far away from the diode D1, a second pin of the control chip U1 is idle, a third pin of the control chip U1 is connected to a USB switch through the resistor R1, a fourth pin of the control chip U1 is connected to the resistor R4, a fifth pin of the control chip U1 is connected to a charging prompt output lamp through the resistor R9, a sixth pin of the control chip U1 is idle, a seventh pin of the control chip U1 is connected to the resistor R7, an eighth pin of the control chip U1 is grounded, the eighth pin of the control chip is connected to the first pin of the control chip U1 through the capacitor C3, the USB charging switch is coupled to the control chip through the resistor R1 to determine a switch state, and the model of the control chip mcu 1 is usop 8. When the charging is in progress, the external charging prompt output lamp is controlled by the control chip U1 to work at 244Hz
The resistor R7, the resistor R8, the capacitor C4, the capacitor C5, the transformer T and the triode Q3 form a self-oscillation boosting circuit, and VDD (battery voltage) is boosted by 32 times to drive and light the EL lamp strip. Triode Q3 is the PNP type, the keeping away from of resistance R7 control chip U1 one end with resistance R8 is connected, another termination of resistance R8 triode Q3's base, triode Q3's emitter connects transformer T, triode Q3's collecting electrode ground connection, triode Q3's base is passed through electric capacity C4 connects triode Q3's collecting electrode, transformer T passes through electric capacity C5 connects resistance R7 respectively with resistance R8, transformer T still connects EL lamp strip respectively with resistance R2.
The transformer T is a three-phase winding transformer, the transformer T comprises a first winding L1, a second winding L2 and a third winding L3, the first winding L1 and the second winding L2 are primary sides of the transformer T, the third winding L3 is a secondary side of the transformer T, a synonym end of the first winding L1 is connected with the resistor R2, a synonym end of the first winding L1 is connected with a synonym end of the second winding L2 in series, a synonym end of the first winding L1 is connected with an emitter of the triode Q3, a synonym end of the second winding L2 and a synonym end of the third winding L3 are connected with the capacitor C5, and a synonym end of the third winding L3 is connected with the EL lamp strip.
Diode D1, resistance R2, resistance R5, resistance R6, electric capacity C1, electric capacity C2, power protection chip U2, power management chip U3 constitute lithium electricity and charge and lithium electricity protection circuit, start undervoltage protection when lithium cell voltage drops to 2.5V, start overcharge protection when the lithium cell charges to 4.25V. The model of the power protection chip U2 is DW01DSOT 236. The model of the power management chip U3 is 8205SOT 236.
The anode of the diode D1 is connected with a USB switch, the cathode of the D1 is connected with the resistor R2, the resistor R2 is connected with the resistor R5, and the resistor R5 is connected with the second pin of the power protection chip U2; a first pin of the power protection chip U2 is unloaded, a third pin of the power protection chip U2 is grounded, a second pin and a third pin of the power protection chip U2 are connected through the capacitor C1, a fourth pin of the power protection chip U2 is connected with a third pin of the power management chip U3, a fourth pin and a second pin of the power protection chip U2 are connected through the capacitor C2, a fifth pin of the power protection chip U2 is grounded through the resistor R6, and a sixth pin of the power protection chip U2 is connected with the first pin of the power management chip U3; the second pin and the fifth pin of the power management chip U3 are in short circuit, and the fourth pin and the sixth pin of the power management chip U3 are both grounded.
The triode Q2, the diode D2, the resistor R3 and the resistor R4 form a charging detection circuit, high level is output during charging, low level is output during full charging, the charging state is judged through the single-chip microcomputer control chip, and the control chip controls an external LED to indicate.
Triode Q2 is the PNP type, triode Q2's projecting pole connects the USB switch, triode Q2's base is connected diode D2's positive pole, diode D2's negative pole connects resistance R2 with the one end that resistance R5 connects, triode Q2's collecting electrode passes through resistance R3 ground connection, resistance R4 one end is connected triode Q2's collecting electrode, the other end termination the fourth foot of control chip U1.
When the LED lamp is being charged, the control chip controls the charging prompt output lamp to be turned on for 0.3 second, the frequency is 244Hz at the moment, the duty ratio is 8%, the lamp is turned off for 0.92 second for charging prompt, the working current of the indicator lamp is reduced by controlling the whole on-off time, the charging efficiency is improved, and when the EL lamp strip is turned off, the current of the whole LED lamp can be smaller than 0.3 uA.
the utility model discloses a EL lamp strip control circuit is through adopting self-excited oscillation boost circuit drive EL lamp, and stability is good, and drive efficiency is high, adopts the external suggestion output lamp that charges of control chip control to charge the suggestion for the charged state reaches the saturation, simple structure, easy to maintain, and controllability is strong.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. an EL lamp strip control circuit is characterized by comprising a power supply protection circuit electrically connected with a USB switch, a charging detection circuit electrically connected with the power supply protection circuit and a self-oscillation boosting circuit electrically connected with the charging detection circuit;
The power protection circuit comprises a power protection chip U2, a power management chip U3, a resistor R2, a resistor R5, a resistor R6, a diode D1, a capacitor C1 and a capacitor C2; the charging detection circuit comprises a triode Q2, a diode D2, a resistor R3 and a resistor R4; the self-oscillation boosting circuit comprises a control chip U1, a resistor R7, a resistor R8, a capacitor C4, a capacitor C5, a transformer T and a triode Q3;
A first pin of the control chip U1 is connected to one end of the resistor R2, which is far away from the diode D1, a second pin of the control chip U1 is idle, a third pin of the control chip U1 is connected to a USB switch through the resistor R1, a fourth pin of the control chip U1 is connected to the resistor R4, a fifth pin of the control chip U1 is connected to a charging prompt output lamp through a resistor R9, a sixth pin of the control chip U1 is idle, a seventh pin of the control chip U1 is connected to the resistor R7, an eighth pin of the control chip U1 is grounded, and the eighth pin of the control chip is connected to the first pin of the control chip U1 through the capacitor C3;
Triode Q3 is the PNP type, the keeping away from of resistance R7 control chip U1 one end with resistance R8 is connected, another termination of resistance R8 triode Q3's base, triode Q3's emitter connects transformer T, triode Q3's collecting electrode ground connection, triode Q3's base is passed through electric capacity C4 connects triode Q3's collecting electrode, transformer T passes through electric capacity C5 connects resistance R7 respectively with resistance R8, transformer T still connects EL lamp strip respectively with resistance R2.
2. The EL light bar control circuit of claim 1, wherein the transformer T is a three-phase winding transformer, the transformer T comprises a first winding L1, a second winding L2 and a third winding L3, the first winding L1 and the second winding L2 are primary sides of the transformer T, the third winding L3 is a secondary side of the transformer T, a synonym of the first winding L1 is connected with the resistor R2, a synonym of the first winding L1 is connected with a synonym of the second winding L2 in series, a synonym of the first winding L1 is connected with an emitter of the transistor Q3, a synonym of the second winding L2 and a synonym of the third winding L3 are connected with the capacitor C5, and a synonym of the third winding L3 is connected with the EL light bar.
3. The EL light bar control circuit of claim 1, wherein the anode of the diode D1 is connected to a USB switch, the cathode of the D1 is connected to the resistor R2, the resistor R2 is connected to the resistor R5, and the resistor R5 is connected to the second pin of the power protection chip U2;
A first pin of the power protection chip U2 is unloaded, a third pin of the power protection chip U2 is grounded, a second pin and a third pin of the power protection chip U2 are connected through the capacitor C1, a fourth pin of the power protection chip U2 is connected with a third pin of the power management chip U3, a fourth pin and a second pin of the power protection chip U2 are connected through the capacitor C2, a fifth pin of the power protection chip U2 is grounded through the resistor R6, and a sixth pin of the power protection chip U2 is connected with the first pin of the power management chip U3;
The second pin and the fifth pin of the power management chip U3 are in short circuit, and the fourth pin and the sixth pin of the power management chip U3 are both grounded.
4. The EL lamp strip control circuit of claim 1, wherein the triode Q2 is PNP type, the emitter of the triode Q2 is connected with a USB switch, the base of the triode Q2 is connected with the anode of the diode D2, the cathode of the diode D2 is connected with one end of the resistor R2 connected with the resistor R5, the collector of the triode Q2 is grounded through the resistor R3, one end of the resistor R4 is connected with the collector of the triode Q2, and the other end is connected with the fourth pin of the control chip U1.
5. the EL light bar control circuit of claim 1, wherein the control chip U1 is model MCUSOP 8.
6. The EL light bar control circuit of claim 1, wherein the power protection chip U2 is DW01DSOT 236.
7. The EL light bar control circuit of claim 1, wherein the power management chip U3 is model 8205SOT 236.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822196140.7U CN209787518U (en) | 2018-12-26 | 2018-12-26 | EL lamp strip control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822196140.7U CN209787518U (en) | 2018-12-26 | 2018-12-26 | EL lamp strip control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209787518U true CN209787518U (en) | 2019-12-13 |
Family
ID=68790775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822196140.7U Expired - Fee Related CN209787518U (en) | 2018-12-26 | 2018-12-26 | EL lamp strip control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209787518U (en) |
-
2018
- 2018-12-26 CN CN201822196140.7U patent/CN209787518U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 Termination date: 20201226 |