CN212992658U

CN212992658U - WIFI bulb drive circuit

Info

Publication number: CN212992658U
Application number: CN202021137007.5U
Authority: CN
Inventors: 李希龙
Original assignee: Xiamen Longstar Lighting Co Ltd
Current assignee: Xiamen Longstar Lighting Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-04-16
Anticipated expiration: 2030-06-18

Abstract

The utility model provides a WIFI bulb drive circuit can realize a step-down circuit of WIFI power supply and lighting circuit sharing, gives the WIFI module power supply through stepping down earlier, and components and parts are saved in the power supply for the LED chip that steps up afterwards, make whole drive power supply become simple, cost reduction.

Description

WIFI bulb drive circuit

Technical Field

The utility model relates to a light emitting device especially relates to LED.

Background

The existing WIFI bulb lamp drive is that power is obtained by a DC to DC chip (such as KP3210 and BP2525D) after a rectifier bridge of a power supply, then the DC chip reduces the direct current voltage 331v after the bridge to 3.3v to supply power for a WIFI module, and the 3.3v voltage is too low to supply power for an LED chip of a main circuit, so the power supply mode of the LED chip is that a voltage reduction chip (DC to DC) is added after the bridge to supply power for a light emitting diode, and the cost of the whole WIFI drive circuit is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the main technical problem that a WIFI bulb drive circuit is provided, saves components and parts, makes whole drive power supply become simple, cost reduction.

In order to solve the technical problem, the utility model provides a WIFI bulb drive circuit, include: the voltage-reducing circuit comprises a rectifier bridge, a filter circuit, a voltage-reducing circuit and a voltage-multiplying circuit;

the alternating current input end of the rectifier bridge is connected with a mains supply, and the output direct current voltage is reduced to 3.3V by the voltage reduction circuit after being filtered by the filter circuit and supplies power to the wifi module; the voltage of 3.3V is boosted by the voltage doubling circuit and then supplies power to the LED chip.

In a preferred embodiment: the filter circuit comprises an inductor L1, a capacitor C1, a capacitor C2 and a resistor R1; the inductor L1 is connected between the positive electrode of the direct current output of the rectifier bridge and the pin 1 of the buck chip u 1; the resistor R1 is connected with the inductor L1 in parallel; the capacitor C1 is connected between the positive pole and the negative pole of the direct current output of the rectifier bridge, and the capacitor C2 is connected between the pin 1 of the buck chip u1 and the negative pole of the direct current output.

In a preferred embodiment: the voltage reduction circuit comprises a voltage reduction chip u1, resistors R2, R3, R4, R5, R6 and R7, diodes D1, D2 and D3, an inductor L2, capacitors C3, C4, C5 and C6;

the pin 4 of the voltage reduction chip u1 is connected to the cathode of the diode D3 through the resistor R2 and the capacitor C5, and the anode of the D3 is connected to the cathode of the direct current output through the capacitor C6; the pin 4 of the voltage reduction chip u1 is also connected to the cathode of D3 through resistors R3, R4 and R6; the resistor R5 is connected with the resistor R6 in parallel; pin 3 of the buck chip u1 is connected to one end of the resistor R5 connected with the resistor R6; pin 2 of the buck chip u1 is connected to the negative pole of the direct current output through an inductor L2 and a resistor R7; pin 2 of the buck chip u1 is also connected to the cathodes of diodes D1 and D2, and the anodes of diodes D1 and D2 are connected to the dc output cathode; pin 1 of the buck chip u1 is connected with pin 2 through a capacitor C4;

one end of the inductor L2, which is connected with the resistor R7, is connected to a vcc pin of the wifi module u 2; pin 4 of wifi, module u2 is connected to the base of the switch tube Q1.

In a preferred embodiment: the voltage doubling circuit comprises capacitors C7, C8 and C9, diodes D4, D5 and D6, and a resistor R8;

one end of the inductor L2 connected with the resistor R7 is connected to the anode of the LED chip through a capacitor C7 and a diode D5, the cathode of the diode D4 is connected to one end of the capacitor C7 connected with a diode D5, and the anode is connected to the cathode of the direct current output; the cathode of the diode D5 is connected to the anode of the diode D6 through capacitors C8 and C9, and the cathode of the diode D6 is connected to one end of the inductor L2 connected with the resistor R7; one end of the capacitor C8 connected with the capacitor C9 is connected to the negative electrode of the direct current output;

the collector of the switch tube Q1 is connected to the cathode of the LED chip, the emitter is connected to the anode of the diode D6, and the resistor R8 is connected between the anode of the LED chip and the emitter of the switch tube Q1.

Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:

Drawings

Fig. 1 is a circuit diagram of the preferred embodiment of the present invention.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected," may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or connected between two elements.

Referring to fig. 1, the present embodiment provides a WIFI bulb driving circuit, including: the voltage-reducing circuit comprises a rectifier bridge, a filter circuit, a voltage-reducing circuit and a voltage-multiplying circuit;

The filter circuit comprises an inductor L1, a capacitor C1, a capacitor C2 and a resistor R1; the inductor L1 is connected between the positive electrode of the direct current output of the rectifier bridge and the pin 1 of the buck chip u 1; the resistor R1 is connected with the inductor L1 in parallel; the capacitor C1 is connected between the positive pole and the negative pole of the direct current output of the rectifier bridge, and the capacitor C2 is connected between the pin 1 of the buck chip u1 and the negative pole of the direct current output.

The voltage reduction circuit comprises a voltage reduction chip u1, resistors R2, R3, R4, R5, R6 and R7, diodes D1, D2 and D3, an inductor L2, capacitors C3, C4, C5 and C6;

The voltage doubling circuit comprises capacitors C7, C8 and C9, diodes D4, D5 and D6, and a resistor R8;

An alternating current voltage 220v is added to two ends of the LN, after the LN is processed by bridge rectifier, a filter circuit is formed by L1, C1, C2 and R1, a voltage reduction circuit is formed by a voltage reduction chip U1 and peripheral circuit resistors R2-R7, diodes D1, D2, D3, an inductor L2, capacitors C3, C4, C5 and C6, the voltage is reduced to about 3.3v, namely the voltage at two ends of the capacitor C6, and power is supplied to a WIFI module U2; the voltage doubling circuit consisting of C7-C9, D4-D6 and R8 supplies power to the LED chip. 4-pin output level signals of the WIFI module U2 control the conduction state of the switch tube Q1, so that the LED chip is controlled to be turned on or off and adjusted in light by WIFI.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. A WIFI bulb drive circuit, its characterized in that includes: the voltage-reducing circuit comprises a rectifier bridge, a filter circuit, a voltage-reducing circuit and a voltage-multiplying circuit;

2. The WIFI bulb driving circuit according to claim 1, wherein: the filter circuit comprises an inductor L1, a capacitor C1, a capacitor C2 and a resistor R1; the inductor L1 is connected between the positive electrode of the direct current output of the rectifier bridge and the pin 1 of the buck chip u 1; the resistor R1 is connected with the inductor L1 in parallel; the capacitor C1 is connected between the positive pole and the negative pole of the direct current output of the rectifier bridge, and the capacitor C2 is connected between the pin 1 of the buck chip u1 and the negative pole of the direct current output.

3. The WIFI bulb driving circuit according to claim 2, wherein: the voltage reduction circuit comprises a voltage reduction chip u1, resistors R2, R3, R4, R5, R6 and R7, diodes D1, D2 and D3, an inductor L2, capacitors C3, C4, C5 and C6;

one end of the inductor L2, which is connected with the resistor R7, is connected to a vcc pin of the wifi module u 2; pin 4 of the wifi module u2 is connected to the base of the switch tube Q1.

4. A WIFI bulb driving circuit according to claim 3, wherein: the voltage doubling circuit comprises capacitors C7, C8 and C9, diodes D4, D5 and D6, and a resistor R8;