CN209897322U

CN209897322U - Light-adjustable LED lamp power supply with USB output isolation belt

Info

Publication number: CN209897322U
Application number: CN201920375863.5U
Authority: CN
Inventors: 林建琰; 林二勇
Original assignee: Xiamen Xingzhuo Technology Co Ltd
Current assignee: Xiamen Xingzhuo Technology Co Ltd
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2020-01-03
Anticipated expiration: 2029-03-22

Abstract

The utility model provides a dimmable LED lamp power supply with USB output in an isolation belt, which comprises an AC 90V-264V input, a first main control chip, a second main control chip and a singlechip control module; the alternating current 90V-264V input is respectively connected with a first main control chip and a second main control chip, the single chip microcomputer control module is connected with the first main control chip, and the first main control chip is an LED lamp driving control chip; the singlechip control module controls the first main control chip to control the output voltage and current of the lamp so as to control the dimming of the LED lamp; wherein the output of the first main control chip is 20-42 VDC, and the current is 0-1.6A; the output of the second main control chip is 5V2A with USB, and supplies power to the single chip microcomputer control module. The utility model provides a PWM adjusts luminance the problem that the uncontrollable lamp goes out completely, really realizes many grades and even electrodeless adjusting luminance.

Description

Light-adjustable LED lamp power supply with USB output isolation belt

[ technical field ] A method for producing a semiconductor device

The utility model relates to a LED lighting apparatus field, in particular to LED lamp power.

[ background of the invention ]

With the development of LED lighting, the conventional incandescent lamp, the energy saving lamp, has gradually exited the historical stage. The design scheme of the LED lamp lighting is five-flower eight-door, and the price is lower and lower. From the earliest isolated switching power supplies to non-isolated switching power supplies to the vast number of linear buck power supplies currently in use. The manufacturers of the LED low-end illuminating lamps are all in price fighting for orders. How to make some high-end and multi-functional LED lamps, let the enterprise can have one's own place in market competition. However, most of the existing LED lamps on the market do not have a multi-level dimming function, and even if dimming is possible, the problem that the dimming lamp cannot be completely turned off when the dimming lamp is darkest exists, and most of the LED lamps cannot charge other USB devices such as a mobile phone, so that the application scenarios are greatly limited.

Dimming lamps in the current lighting industry are roughly divided into three types according to different control modes:

the first type is non-isolated BUCK or a dimming lamp composed linearly, in the control mode, once a person touches output or a lamp bead has the risk of electric shock, therefore, the isolation of the shell is required to be done, but the cost is low;

the second is a single-stage AC-DC isolated dimming control mode, the output power of the LED lamp is large, the advantage is high cost performance, and the utility model belongs to the control mode;

the third is a control mode adopted by the multifunctional intelligent desk lamp, which is firstly that one way of AC-DC is externally arranged or the AC-DC is made into an internal power supply, then the DC-DC realizes dimming, Bluetooth and other control, so that the cost is very high, and meanwhile, if the power of an output lamp reaches more than 50W, the difficulty is very high, because the traditional DC-DC drives the LED lamp to reach more than 50W, the cost is very high. The lamp solution described above is generally applied to multifunctional table lamps.

20180126, the multifunctional intelligent desk lamp with adjustable light Bluetooth driving disclosed by the Chinese utility model with publication number CN206929704U, belongs to the third control mode, the MCU control unit is electrically connected with a key circuit and a liquid crystal display screen, the key circuit and the liquid crystal display screen are fixed on the base, the temperature signal of the temperature sensor is transmitted to the MCU control unit, and the MCU control unit controls the temperature in the liquid crystal display screen display chamber according to the temperature signal; the voltage sensor detects a voltage signal of the storage battery, the voltage signal of the voltage sensor is transmitted to the MCU control unit, and the MCU control unit controls the switching circuit to be connected with or disconnected from the storage battery according to the voltage signal; the mobile phone transmits a control signal to the Bluetooth receiving module, the signal of the Bluetooth receiving module is transmitted to the MCU, and the MCU controls the LED lamp beads according to an instruction signal of the mobile phone. Besides the functions of a common desk lamp, the desk lamp also has the functions of using solar energy, displaying temperature and charging a mobile phone, and can control the LED lamp beads to be turned on, turned off, bright and dark and twinkle according to a mobile phone instruction signal.

[ Utility model ] content

The to-be-solved technical problem of the utility model lies in providing a LED lamp power of can adjusting luminance of median USB output, solves the problem that PWM adjusts luminance the complete going out of uncontrollable lamp, really realizes many grades and even electrodeless adjusting luminance.

The utility model discloses a realize like this: a dimmable LED lamp power supply with an isolation band USB output comprises an alternating current 90-264V input, a first main control chip, a second main control chip and a single-chip microcomputer control module; the alternating current 90V-264V input is respectively connected with the first main control chip and the second main control chip, and the first main control chip supplies power to the LED lamp; the singlechip control module controls the voltage and the current output by the first main control chip so as to control the dimming brightness of the LED lamp or control the LED lamp to be in a completely light-off state; wherein the content of the first and second substances,

the output of the first main control chip is 20-42 VDC, and the current is 0-1.6A;

the output of the second main control chip is 5V2A with USB, and supplies power to the single-chip microcomputer control module.

Further, the first main control chip is a KP115 chip of the oblivious technologies ltd;

the singlechip control module comprises a touch switch SW1, a singlechip and an optocoupler PH1, the touch switch SW1 is connected with a PIN5 of the singlechip, the PIN4 of the singlechip is connected with a PIN2 of the optocoupler PH1 through a resistor R37, a primary PIN3 of the optocoupler PH1 is grounded, and a PIN4 is connected with a PWM PIN of the first main control chip; the key pressing times of the light touch switch SW1 controls the optical coupler PH1 to output PWM waveforms with different duty ratios from 0% to 100% through the single chip microcomputer, the PWM waveforms are input to the PWM pin of the first main control chip, the first main control chip controls corresponding output currents after receiving the PWM waveforms, and different current sizes correspond to the brightness of different LED lamps.

Further, when the optocoupler PH1 outputs a PWM waveform with a duty ratio of 0%, the PIN2 of the single chip microcomputer pulls down the VDD power supply PIN of the first main control chip to achieve a complete light-off function.

Further, the second main control chip is a PN8370 chip of Wuxin Ming microelectronic GmbH, and the output of the USB provides a 5V power supply to connect with PIN1 of the single chip microcomputer.

The utility model has the advantages that: the utility model discloses a LED lamp power belongs to and keeps apart safe power, and second LED adjusts luminance and realizes that the pin of control elementary first main control chip does not need AC-DC, then DC-DC, omits DC-DC return circuit of a way of adjusting luminance; and also combines several additional functions of the current market needs: 1. the power supply of the LED lamp is provided with USB5V2A output and can be used for charging corresponding equipment, such as a mobile phone and the like; 2. the LED lamp power supply is designed to have a multi-gear dimming function by matching with a corresponding single chip microcomputer control module program; 3. the LED lamp power supply solves the problem that the dimming lamp in the industry at present cannot be completely turned off when being darkest; 4. the power supply of the LED lamp conforms to the 60598 certification standard of main markets of FCC, GS and UL, has wide application range, and is applied to high-power occasions such as projection lamps, high shed lamps and the like.

[ description of the drawings ]

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a schematic circuit block diagram of the dimmable LED lamp power supply of the present invention.

Fig. 2 is a circuit diagram of the first main control chip of the dimmable LED lamp power supply and the control dimming loop of the single chip microcomputer control module.

Fig. 3 is a circuit diagram of an embodiment of a second main control chip of the dimmable LED lamp power supply of the present invention.

Fig. 4 is a circuit diagram of an embodiment of the present invention, which selects 10 strings of LEDs, for the dimmable LED lamp power supply.

Fig. 5 is a functional flow diagram of the dimmable LED lamp power supply of the present invention.

Fig. 6 is an output flow chart of the second main control chip of the dimmable LED lamp power supply of the present invention.

Fig. 7 is the output flow chart of the first main control chip of the dimmable LED lamp power supply of the present invention.

[ detailed description ] embodiments

Referring to fig. 1 to 7, the dimmable LED lamp power supply with USB output of the present invention includes an ac 90V-264V input, a first main control chip, a second main control chip and a single chip microcomputer control module; the alternating current 90V-264V input is respectively connected with the first main control chip and the second main control chip, and the first main control chip supplies power to the LED lamp; the singlechip control module controls the voltage and the current output by the first main control chip so as to control the dimming brightness of the LED lamp or control the LED lamp to be in a completely light-off state; wherein the content of the first and second substances,

the output of the first main control chip is 20-42 VDC, and the current is 0-1.6A; can be realized by a lamp driving power supply chip with an electrodeless dimming function, such as a KP115 chip produced by Biyi science and technology limited company, which has a dimming function.

As shown in fig. 2, for the circuit structure of the control dimming circuit of an embodiment of the present invention, terminal L and N are ac 90V-264 Vac input terminals in fig. 2, and these components are EMC components and parts VR1, LF1, LF2, CX2, C1, C4 and L2. A first main control chip, i.e., IC2, a peripheral circuit of which belongs to a typical flyback switching power supply of a single-pole PFC, T1 is an isolation transformer, and in the embodiment shown in fig. 2, the first main control chip is a necessary and easy KP115 chip; the singlechip, namely IC3, selects HT48R002 chip of Taiwan alloy limited company; the circuit primitive devices PH1, PH2, Q2, R43, C11, R37 and R42 are core control circuit parts, wherein a light touch switch SW1, an optical coupler PH1, R37 and a PIN4 controlled by a single chip microcomputer form a light adjusting PIN for controlling the primary KP115 chip through optical coupling isolation, and the specific control mode is as follows: the PIN4 controlled by the single chip microcomputer outputs PWM waveforms with different duty ratios by lightly touching the key-press times of the button switch SW1, and is set from 0%. 10.. 100% by a program controlled by the single chip microcomputer (the PWM waveform of the duty ratio controlled by the program controlled by the single chip microcomputer is mature technology at present), the primary 3 PINs and the primary 4 PINs of the optical coupler PH1 are controlled by the PWM waveforms, the PIN3 of the IC2(KP115 chip) synchronously generates PWM waveforms, the KP115 chip receives the PWM waveforms and then controls corresponding output currents, and different current sizes correspond to the brightness of different LED lamps, so that the dimming function of the LED lamps is realized.

Because even the PIN3 of KP115 chip received 0% duty cycle signal, output voltage still about 6%, consequently still keep certain luminance and can't go out completely, the utility model discloses a realize going out completely, when button switch circulated to 0% duty cycle, singlechip control's PIN2 comes auxiliary control, realizes the function of turning off the lamp completely promptly through the VCC power supply foot of the KP115 chip of drawing down first main control chip. The method comprises the following steps: the single chip microcomputer control device further comprises a triode Q2, a resistor R43 and an optocoupler PH2, wherein the e stage of the triode Q2 is connected with a VDD pin of the first main control chip, the b stage and the c stage are respectively connected with two ends of the resistor R43, the b stage is also connected with a 4 pin of an optocoupler PH2, a pin3 of the optocoupler PH2 is grounded, a pin2 is connected with a PH2 of the single chip microcomputer, and a pin1 is connected with a pin1 of the optocoupler PH 1; when the tact switch is circulated to 0% duty ratio, PIN2 controlled by the single chip microcomputer starts to output low level, the optocoupler PH2 is switched on, the B pole of Q2 is pulled to the primary ground, Q2 is cut off, the VCC PIN of IC2KP115 has no voltage, the KP115 chip stops working, the voltage and current output to the lamp become zero, and the LED lamp is turned off.

The output of the second main control chip is 5V2A with a USB and supplies power for the singlechip; as shown in fig. 3, IC1 is a second master chip that can be implemented as a sn-free, tin-free, or PN8370 chip from microelectronics, inc. The terminals L and N in FIG. 3 are input terminals of alternating current 90V to 264Vac, and are connected with a second main control chip; the circuit diagram is a conventional switching power supply circuit; the PN8370 chip of the Wuxi Peng microelectronics corporation has the advantages that the high-voltage starting can be realized, the starting time of less than or equal to 100mS can be realized no matter the input voltage is high or low, and the USB output can reach 5V voltage quickly so as to supply power for the single chip microcomputer or charge other equipment.

Referring to fig. 4, a circuit diagram of 10 strings of LEDs is shown, where fig. 4 includes a first main control chip, a second main control chip, and a single chip microcomputer control module.

As shown in fig. 5, the dimming function control flow of the present invention is: after the AC is electrified, the USB outputs 5V2A by default, the LED lamp is in a light-out state, the light-touch switch SW1 is pressed down according to needs, the key-press frequency signal of the LED lamp can output different duty ratio PWM waveforms through the control of the single chip microcomputer PIN4, the optocoupler PH1 is controlled to realize synchronous light-on, and the purpose of controlling the PIN3PWM PIN of the first main control chip KP115 to realize light dimming is achieved. Therefore, N-gear cyclic dimming can be realized according to the state and the times of the keys, and the dimming is carried out from 0% (light-out).. 10% (slight light).

As shown in fig. 6, the output flow of USB5V2A of the present invention is: the method comprises the steps of inputting 90V-264 Vac, requiring the starting time to be within 100ms at the same time, wherein the starting time must be smaller than the starting time of a first main control chip KP115, and therefore, the 5V2A output supplies power for a USB on one hand, and supplies power for a single chip microcomputer on the other hand, once the single chip microcomputer successfully supplies power, a PIN2 is initially pulled down, an optical coupler PH2 is switched on, Q2 is switched off, the voltage of a VDD PIN (namely PIN5) of the first main control chip is pulled down at the moment, the first main control chip cannot work, the corresponding lamp voltage current is zero, the lamp is not bright, and the default AC power-on state.

As shown in FIG. 7, the output flow of 20-36 Vdc/1.6A of the present invention is: inputting 90V-264 Vac, requiring the starting time T of the first main control chip to satisfy that T is more than or equal to 200ms and less than 1s, aiming at realizing that the second main control chip is started first at the moment of electrifying the AC and the VDD of the first main control chip is pulled down, and showing the phenomena that: the AC is electrified and initialized to be that the LED lamp is not on, and the single chip microcomputer firstly controls the LED lamp to be in a full-off state.

In addition, it should be noted that the various chips are all sold in the market and in a fully disclosed state, and in the control function, the control programs in the chips are all common programs in the field, and those skilled in the art can implement the control functions completely according to the level of the prior art without creative labor.

As before, the utility model discloses a technique of opening of single chip microcomputer control module control lamp driver chip KP 115's VDD pin solves the problem that the PWM of chip KP115 of adjusting luminance adjusts luminance and can't control the lamp to go out completely, really realizes many grades and even electrodeless adjusting luminance. The LED lamp can be widely applied to indoor and outdoor lamps such as table lamps, projection lamps and high shed lamps, and is wide in application.

Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides an LED lamp power of can adjusting luminance of USB output is taken in isolation which characterized in that: the system comprises an alternating current 90V-264V input, a first main control chip, a second main control chip and a single chip microcomputer control module; the alternating current 90V-264V input is respectively connected with the first main control chip and the second main control chip, the single chip microcomputer control module is connected with the first main control chip, and the first main control chip is an LED lamp driving control chip; the single chip microcomputer control module controls the first main control chip to control the output voltage and current of the lamp so as to control the dimming of the LED lamp; wherein the content of the first and second substances,

2. The dimmable LED lamp power supply with isolated USB output of claim 1, wherein: the first main control chip is a KP115 chip of Biyi science and technology limited company;

3. The dimmable LED lamp power supply with isolated USB output of claim 2, wherein: the singlechip control module further comprises a triode Q2, a resistor R43 and an optocoupler PH2, wherein the e stage of the triode Q2 is connected with a VDD pin of the first main control chip, the b stage and the c stage are respectively connected with two ends of the resistor R43, the b stage is also connected with a 4 pin of an optocoupler PH2, a pin3 of the optocoupler PH2 is grounded, a pin2 is connected with a PH2 of the singlechip, and a pin1 is connected with a pin1 of the optocoupler PH 1;

when the optical coupler PH1 outputs a PWM waveform with the duty ratio of 0%, the PIN2 of the single chip microcomputer pulls down a VDD power supply PIN of the first main control chip to achieve the function of completely turning off the lamp.

4. The dimmable LED lamp power supply with isolated USB output of claim 2, wherein: the second main control chip is a PN8370 chip of Wuxin Ming microelectronic corporation, and the output of the USB provides a PIN1 of a 5V power supply connected with the single chip microcomputer.