Reverse connection prevention LED double-color-temperature lamp strip circuit

Abstract

The utility model discloses an anti-reverse connection LED double color temperature lamp strip circuit, including: a terminal CON1, a fool-proof circuit, a plurality of LED lamp strings, a voltage stabilizing circuit and a driving chip U1, the fool-proof circuit is electrically connected with the LED lamp strings and the voltage stabilizing circuit, the other end is grounded, the LED lamp strings are electrically connected with the collector electrode of a triode, the base electrode of the triode is electrically connected with the driving chip U1, and the emitter electrode is grounded. The voltage stabilizing circuit is electrically connected with the driving chip U1, the driving chip U1 is grounded through a control switch SW1, the fool-proof circuit comprises a diode D1, a diode D2, a diode D3 and a diode D4, the first fool-proof series circuit and the second fool-proof series circuit are connected in parallel, one contact on the terminal CON1 is electrically connected with a wire between the diode D1 and the diode D2, and the other contact on the terminal CON1 is electrically connected with a wire between the diode D3 and the diode D4. And the other contact is electrically connected with the lead between the diode D3 and the diode D4. By adopting the technical scheme, positive and negative electrode connection does not need to be distinguished during terminal wiring, a circuit is prevented from being damaged, and the problem that a product is burnt out due to reverse connection or misconnection of a user is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of LED lamp especially relates to a prevent reverse connection LED double color temperature lamp area circuit. BACKGROUND

[0002] Current LED double color temperature product has been more and more accepted by the public, but the existing LED double color temperature lamp area circuit still has certain deficiency, reference the existing LED double color temperature lamp area circuit shown in the specification appendix Figure 1 The terminal CON1 has pin 1, 2, wherein pin 1, 2 are used for connecting positive and negative power supply lines, pin 1 is connected to LED lamp string for power supply, one way is connected to triode Q1, resistance R3 and drive chip U1, for the power supply of drive chip U1, control switch SW opens different gears, the pin 5 / pin 6 of drive chip U1 respectively gives triode Q1 / Q2 control signal, controls LED lamp to realize single bright, double color temperature and different lighting effect, although this kind of circuit can meet certain use demand, but still has certain deficiency in actual use process, for example, after the input positive and negative power supply lines connected by one end of pin 1, 2 of terminal or the output line connected by pin 1, 2 is reversed, it will cause circuit damage, and LED lamp cannot work normally. CONTENT OF UTILITY MODEL

[0003] In order to overcome the existing technical defects, the purpose of the utility model is to provide a kind of prevent reverse connection LED double color temperature lamp area circuit to solve the above technical problems.

[0004] The technical scheme that the utility model solves technical problem adopts as follows:

[0005] According to one aspect of the utility model, a kind of prevent reverse connection LED double color temperature lamp area circuit is designed, including: terminal CON1, foolproof circuit, several LED lamp strings, voltage stabilizing circuit and drive chip U1, the input end of each the LED lamp string and the input end of voltage stabilizing circuit are electrically connected with the output end of the foolproof circuit, the other end is grounded, the output end of the LED lamp string is electrically connected with the collector of triode, the base of triode is electrically connected with the drive chip U1, and the emitter is grounded, the output end of the voltage stabilizing circuit is electrically connected with the drive chip U1, the drive chip U1 is grounded by control switch SW1, the foolproof circuit includes diode D1, diode D2, diode D3 and diode D4, diode D1 and diode D2 are connected in series to form first foolproof series circuit, diode D3 and diode D4 are connected in series to form second foolproof series circuit, first foolproof series circuit and second foolproof series circuit are connected in parallel, one contact on the terminal CON1 is electrically connected with the wire between diode D1 and diode D2, and the other contact is electrically connected with the wire between diode D3 and diode D4.

[0006] By the diode D1, the diode D2, the diode D3 and the diode D4 in the fool-proof circuit, the non-polarity of the terminal CON1 is realized, that is, when the positive and negative power supply lines of the external power supply line are connected reversely with the pins 1 and 2 on the terminal CON1 or the pins 1 and 2 on the terminal CON1 are connected reversely with the positive and negative lines between the fool-proof circuit, normal power supply can still be realized, and it is not necessary to distinguish the positive and negative connection, the circuit damage is prevented, and the problem that the product is burnt due to reverse connection or misconnection of the user is solved.

[0007] In order to better solve the above technical defects, the utility model also has better technical schemes:

[0008] In some embodiments, the voltage stabilizing circuit comprises a voltage stabilizing tube LDO1, an input end of the voltage stabilizing tube LDO1 is electrically connected with an output end of the fool-proof circuit, an output end is electrically connected with the driving chip U1 through a resistor R2, and a grounding end is grounded.

[0009] In some embodiments, the voltage stabilizing circuit further comprises a capacitor C4 and a capacitor C5, one end of the capacitor C4 is connected with an input end connecting end of the voltage stabilizing tube LDO1, the other end is grounded, one end of the capacitor C5 is connected with an output end connecting end of the voltage stabilizing tube LDO1, and the other end is grounded.

[0010] In some embodiments, a resistor R1 is connected in series between an output end of the LED lamp string and a collector of the triode.

[0011] In some embodiments, a resistor R3 is connected in series between the control switch SW1 and the driving chip U1. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a schematic diagram of an existing LED double-color temperature lamp strip circuit;

[0013] Figure 2 It is a schematic diagram of the anti-reverse connection LED double-color temperature lamp strip circuit of one embodiment provided by the utility model; DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further described in detail below in combination with specific embodiments and with reference to the drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0015] In the description of the utility model, it is understood that the orientation description, such as the orientation or positional relationship of the indication of up, down, front, back, left, right etc. based on the orientation or positional relationship shown in the drawing, is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as limiting the utility model.

[0016] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing, connecting and fixing should be understood broadly, and the skilled person in the art can determine the specific meaning of the above words in the utility model in combination with the specific content of the technical scheme.

[0017] Reference Figure 2 As shown in the figure, the utility model provides a kind of anti-reverse connection LED double color temperature lamp strip circuit, including: terminal CON1, foolproof circuit, several LED lamp strings, voltage stabilizing circuit and drive chip U1, wherein, LED lamp string is provided with two or three or four or more, the color of several LED lamp strings is different, the LED lamp string of this embodiment preferably is provided with two, and they are LED lamp string one LED1 and LED lamp string two LED2, the color of two LED lamp strings is different, and each LED lamp string is formed by a plurality of LED lamp beads in series, the output end of foolproof circuit is electrically connected with the input end of each LED lamp string, in the embodiment, the output end of foolproof circuit is electrically connected with the input end of LED lamp string one LED1 and the input end of LED lamp string two LED2, and the other end of foolproof circuit is grounded.

[0018] The output end of LED lamp string is electrically connected with the collector of triode, the base of triode is electrically connected with drive chip U1, and the emitter of triode is grounded, in the embodiment, the output end of LED lamp string one LED1 is electrically connected with the collector of triode Q1, the output end of LED lamp string two LED2 is electrically connected with the collector of triode Q2, the base of triode Q1 and the base of triode Q2 are electrically connected with two contacts on drive chip U1 respectively, and the emitter of triode Q1 and the emitter of triode Q2 are both grounded. Wherein, resistance R1 is connected in series between LED lamp string one LED1 and triode Q1 and between LED lamp string two LED2 and triode Q2 respectively, resistance R1 is used for current limiting, triode Q1 is used for controlling the lighting and extinguishing of LED lamp string one LED1, and triode Q2 is used for controlling the lighting and extinguishing of LED lamp string two LED2.

[0019] The output end of the fool-proof circuit is electrically connected with the input end of the voltage stabilizing circuit, the output end of the voltage stabilizing circuit is electrically connected with the driving chip U1, the voltage stabilizing circuit is used for supplying power to the driving chip U1, and the voltage stabilizing circuit comprises a voltage stabilizing tube LDO1, a capacitor C4 and a capacitor C5, the input end of the voltage stabilizing tube LDO1 is electrically connected with the output end of the fool-proof circuit, the output end of the voltage stabilizing tube LDO1 is electrically connected with a resistor R2, the other end of the resistor R2 is electrically connected with the driving chip U1, the grounding end of the voltage stabilizing tube LDO1 is grounded, one end of the capacitor C4 is connected with the input end of the voltage stabilizing tube LDO1, and the other end is grounded, one end of the capacitor C5 is connected with the output end of the voltage stabilizing tube LDO1, and the other end is grounded.

[0020] The driving chip U1 is electrically connected with a resistor R3, the other end of the resistor R3 is electrically connected with a control switch SW1, the other end of the control switch SW1 is grounded, different gears are started through the control switch SW1 to supply different electric signals to the driving chip U1, and the driving chip U1 outputs a high level to the triode Q1 and the triode Q2 to control the LED lamp string one LED1 and the LED lamp string two LED2 to be separately lighted to display one color or to be simultaneously lighted to display two colors.

[0021] The fool-proof circuit comprises diodes D1, D2, D3 and D4, the diodes D1 and D2 are connected in series to form a first fool-proof series circuit, the diodes D3 and D4 are connected in series to form a second fool-proof series circuit, the first fool-proof series circuit and the second fool-proof series circuit are connected in parallel, the positive pole of the diode D2 and the positive pole of the diode D4 are grounded, one contact point on the terminal CON1 is electrically connected with the wire between the diode D1 and the diode D2, and the other contact point is electrically connected with the wire between the diode D3 and the diode D4.

[0022] The above only describes some embodiments of the present application, and those skilled in the art can make some modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A circuit for preventing reverse connection of LED dual color temperature light strip, characterized in that: include: Terminal CON1, fool-proofing circuit, several LED light strings, voltage stabilizing circuit and driver chip U1, the output end of the fool-proofing circuit is electrically connected to the input end of each LED light string and the input end of the voltage stabilizing circuit, and the other end is grounded, the output end of the LED light string is electrically connected to the collector of the transistor, the base of the transistor is electrically connected to the driver chip U1, and the emitter is grounded, the output end of the voltage stabilizing circuit is electrically connected to the driver chip U1, and the driver chip U1 is grounded through the control switch SW1, the fool-proofing circuit includes a diode D1, a diode D2, a diode D3 and a diode D4, the diode D1 and the diode D2 are connected in series to form a first fool-proofing series circuit, the diode D3 and the diode D4 are connected in series to form a second fool-proofing series circuit, the first fool-proofing series circuit and the second fool-proofing series circuit are connected in parallel, one contact on the terminal CON1 is electrically connected to the wire between the diode D1 and the diode D2, and the other contact is electrically connected to the wire between the diode D3 and the diode D4.

2. The anti-reverse connection LED dual color temperature light strip circuit according to claim 1, characterized in that: The voltage stabilizing circuit includes a voltage stabilizing tube LDO1 , an input end of the voltage stabilizing tube LDO1 is electrically connected to an output end of the foolproofing circuit, an output end is electrically connected to the driving chip U1 via a resistor R2 , and a ground end is grounded.

3. The anti-reverse connection LED dual color temperature light strip circuit according to claim 2, characterized in that: The voltage stabilizing circuit further includes a capacitor C4 and a capacitor C5. One end of the capacitor C4 is connected to the input end of the voltage regulator tube LDO1 and the other end is grounded. One end of the capacitor C5 is connected to the output end of the voltage regulator tube LDO1 and the other end is grounded.

4. The anti-reverse connection LED dual color temperature light strip circuit according to claim 1, characterized in that: A resistor R1 is connected in series between the output end of the LED light string and the collector of the transistor.

5. The anti-reverse connection LED dual color temperature light strip circuit according to claim 1, characterized in that: A resistor R3 is connected in series between the control switch SW1 and the driver chip U1 .

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