KR101923158B1 - multiple stages dimming device of LED light using the wall-switch - Google Patents

Abstract

The present invention relates to a multiple stages dimming controlling device of an LED lamp using a wall switch including a dimming device. The dimming device comprises: a switching monitoring unit sensing the number of repetitions of on/off of a wall switch; a switching unit applying power applied from a rectifying unit to an LED; a current setting unit setting LED current by receiving current of the switching unit; a transforming unit receiving the current of the current setting unit and increasing the current to be suitable for lighting the LED to deliver the current to the LED, and including a transformer (T1) of first winding and second winding; a constant voltage setting unit supplying the power to the first winding of the transformer (T1); and a controller (IC) operating the entire circuit by receiving the number of repetitions of the on/off of the wall switch through the switching monitoring unit and operating the switching unit, supplying the current to the transforming unit through the current setting unit and the constant voltage setting unit, dividing lamp illumination into three stages, and turning on the LED with a dimming lamp which is sequentially divided by the number of repetitions of the on/off of the wall switch. The present invention dims the LED by including a simple circuit in the controller for a lamp converter, and sequentially dims the illumination of the LED into the three stages of 100%, 42.7%, and 14.6%.

Description

[0001] The present invention relates to a multi-stage dimming device for an LED light using a wall switch,

The present invention relates to a multistage dimming apparatus for an LED lighting using a wall switch, and more particularly to a multistage dimming apparatus for a lighting switch which is equipped with a switching monitor, a switching unit, a transforming unit, a smoothing unit, and a controller (not shown) in a controller for a general lighting converter without a separate dimmer or a regulator Stage dimming device using a wall switch in which an LED light is dimmed in multiple stages by an On / Off signal of a wall switch.

Generally, in dimming of LED lamp, a part for adjusting the brightness, that is, a device for making a variable resistance or voltage change in the dimming switch is constituted, from which the dimming wiring is controlled by a separate regulator (including a remote controller) or a dimmer Dimmer) is used to control the brightness of light.

However, since the conventional LED light dimming device is dimmed by a controller or a dimmer added separately, the structure is complicated, the manufacturing cost is high, and a controller or a dimmer is separately installed in the case of lighting, This is a big and cumbersome problem.

In addition, there is a problem in that it is difficult to use a separate controller or remote controller, and it is not easily spread to consumers due to various unexpected inconveniences such as maintenance and storage problems.

In order to solve such a problem, it is possible to adjust the power supply of the light source unit in the dimmer by recognizing the number of ON / OFF repetition times of the lighting switch as the brightness level setting value of the dimming without changing the dimming control switch and the electric wiring. (LED) light source unit so that the number of repetitions of the dimming is set to a predetermined brightness by controlling the ON / OFF current of the switched-mode power supply (SMPS) An LED light dimming device using a switch-type dimming device capable of controlling the output has been developed.

However, the conventional LED dimming device using the lighting switch type dimming device has a problem in that the circuits of the switch mode power supply (SMPS), the LED light source, and the lighting switch type dimming device are complicated and the manufacturing cost is high as a whole.

Korean Patent Publication No. 10-2010-0125799 (published on Dec. 01, 2010) Korean Patent Registration No. 10-1201803 (published on Nov. 15, 2012)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a switching regulator having a switching controller, a switching unit, a resistor R3 and a zener diode D5, A constant voltage setting section in which a transformer configured with a transformer T1, a zener diode D6 and a capacitor C3 and a lighting circuit are divided into three levels and the wall switch is turned on / off A controller (IC) for lighting the LEDs with the dimming illumination sequentially divided by the number of repetitions of the LEDs, and the LED lighting by the wall switch on / The present invention is directed to a multi-stage dimming device for an LED light using a wall switch that is dimmed into a dimmer.

The present invention relates to a multistage dimming control apparatus for an LED lighting using a wall switch having a dimming device, wherein the dimming device comprises: a switching monitoring unit for detecting the number of times the wall switch is turned on / off; A current setting unit for setting an LED current by applying a current of the switching unit, and a current setting unit for applying a current of the current setting unit to the LED, A constant voltage regulating unit for supplying power to the primary winding of the transformer T1 and a switching regulator for regulating the voltage of the primary winding of the transformer T1, The switching unit is operated to operate the entire circuit, and current is supplied to the transforming unit through the current setting unit and the constant voltage setting unit, Is configured to include; divide as a third step, and on (On) / off (Off) controller (IC) that lights up a sequence LED (LED) in divided dimming lights by the number of repetitions of the wall switch.

Further, according to the present invention, each time the controller IC repeatedly turns on / off the wall switch, the illuminance of the LED is dimmed in sequential order of 100%, 42.7%, and 14.6% .

Further, in the present invention, the controller (IC) senses an overvoltage or a zero current of the overvoltage sensing unit and controls the MOSFET transistor Q1 to turn off.

Further, the present invention is constituted by a resistor-divider of a resistor (R1) and a resistor (R2) connected to the switching monitoring unit power supply and connected to the CLK of the controller (IC) and the ground.

In addition, the switching unit of the present invention is composed of a switching monitoring unit and a MOSFET transistor Q1 connected to the DRV of the controller (IC).

Further, the present invention is constituted by a transformer T1 in which the transformer portion has a core (magnetic core), a primary winding and a secondary winding.

The present invention is also characterized in that the current setting section is constituted by a zener diode D5 constituted between the output of the MOSFET transistor Q1 and the ground and a resistor R3 constituted between the output of the MOSFET transistor Q1 and the input of the transforming section do.

In the present invention, the constant voltage setting unit is composed of a zener diode D6 connected in series between the VDD of the controller IC and the transforming unit, and a capacitor C3 composed of a zener diode D6 and grounded.

The present invention has a simple dimming circuit in a controller for a general lighting converter, thereby simplifying the manufacturing process of the dimming device.

Further, the present invention has the effect of not providing any additional control device (including a remote control) or an additional device, part, or additional wiring of the dimmer based on the wall switch, and thus there is no additional cost.

Further, according to the present invention, dimming is performed in three sequential steps of 100%, 42.7%, and 14.6% in order of illuminance of the LED every time the wall switch is turned on / off. .

In addition, since the present invention uses a single controller having a built-in control unit for setting the brightness according to the dimming step by the proportion of the value of the external resistor, it is possible to freely design and modify the circuit when initializing, It is effective.

In addition, the present invention adopts a totem-pole structure, which enables quick dimming according to the on / off state of the wall switch, low power consumption, and large current can be applied to the LED There is an effect.

Further, the present invention has an effect that the voltage applied from the rectifying part is appropriately lowered by the resistor divider composed of the resistor R1 and the resistor R2 of the switching monitoring part to be input to the controller IC.

In addition, the present invention stops the output driver of the controller (IC) when the LED (LED) is short-circuited by the resistor (R3) and the zener diode (D5) of the current setting part or the current of the transformer .

In addition, the present invention can be realized by a zener diode (D6) and a capacitor (D3)

There is an effect that the input voltage of the primary winding of the transformer T1 of the transformer is stabilized and the noise of the voltage applied to the VDD of the controller IC is removed and the current is rectified and planarized.

1 is a block diagram of a controller used in the present invention;
Figure 2: Circuit arrangement of the invention.
Figure 3: Flowchart of dimming control of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3. FIG.

The present invention is additionally provided in a wiring structure in which a wall switch for turning on / off an illumination lamp installed in a common building such as a home, a building, a hotel and a factory is additionally provided, The present invention can be applied to a switch having a simple structure capable of only an ON / OFF function for interrupting an AC power supplied from the outside.

For example, it is applied to a general lighting lamp, a stand lighting lamp, and a mood lighting lamp having a general power supply On / Off switch installed in a home, a building, a hotel, a factory and other related facilities.

The present invention relates to a control apparatus for an electronic apparatus including a controller (IC), a rectifying section 10, a switching monitoring section 20, a current applying section 30, a switching section 40, a current setting section 50, a transforming section 60, 70, a constant voltage setting unit 80, a smoothing unit 90, a compensation unit 100, and an LED module 110.

The controller (IC) is connected to a dimming control unit and an external CLK as a controller for a general lighting converter, and a driver is connected to an external DRV. The CLK senses the CLK signal of the external wall switch to operate the dimming control unit, and the dimming control unit adjusts the driver by determining the dimming level.

The controller IC receives a repetition number of On / Off of the wall switch through the switching monitoring unit 20 and activates the switching unit 40 to operate the entire circuit, 50, and the constant voltage setting unit 80, divides the illumination intensity into three stages, and sequentially divides the light intensity by a repetition number of On / Off of the wall switch Let the LED light up with the dimming light.

The present invention relates to an apparatus in which an illumination circuit in which an LED is multi-stage dimming is turned on by using a commercial power source of an AC power source, converts an AC power source to a DC power source through a bridge rectifier, Terminal. The direct current power supply DC is supplied to the HV of the controller IC to start the operation of the controller IC and the DRV is supplied to the external circuit of the MOSFET transistor Q1 field effect transistor ) Is operated to activate the entire circuit, so that an LED (Light Emitting Diode) of the LED module 110 emits light.

The CLK of the controller IC is supplied with a CLK signal through a resistor R1 and a resistor R2 which are connected to the upper and lower sides by a DC input. CLK senses a CLK signal according to the presence or absence of a DC input, . Using this structure, the input signal can be remotely adjusted in multiple steps through the on / off switch of the wall switch.

The present invention can easily implement multistage dimming by turning the wall switch on / off without using additional devices, parts, or additional wiring at this stage in the controller for the lighting converter, thereby improving ease of use and high-quality lighting control Can be easily accessed by the consumer without additional burden.

 The above description will be described in more detail.

The rectifier unit 10 is a bridge rectifier (BR) composed of rectifier diodes D1, D2, D3 and D4, which receives an AC current from a power source and converts the AC current into a DC current

The bridge rectifier BR includes a cathode of the diode D1 and a diode D3 connected to the plus of the LED formed in the LED module 110 through a converter of a positive DC current, The anode of the diode D2 and the diode D4 are connected to - of the LED (light emitting diode) by the direct current of -.

Even if the supply voltage supplied from the power source is a DC voltage or an AC voltage, the voltage outputted by the bridge rectifier BR is outputted as a DC voltage. Even if the polarity of the DC voltage is reversely connected due to carelessness of the user, The voltage outputted from the DC power supply has a DC voltage.

An alternating current is applied or disconnected to the bridge rectifier BR of the rectification part 10 by the ON / OFF of the wall switch and the wall rectifier BR of the rectification part 10 is turned on by the ON / When an alternating current is applied to the bridge rectifier BR, a direct current is outputted from the bridge rectifier BR.

The controller (IC) is composed of devices such as a hysteretic comparator, an edge trigger, a triangular wave oscillator, an internal reference voltage (ADJ) generator, an open LED (OVP), a starter, a comparator and a filter, , HV, CLK, DRV, GND while performing functions such as overvoltage protection function for the bias voltage of the controller (IC), cycle current limit function, LED short circuit protection function, output overvoltage protection function, , CSM, COMP, ZCD, and VDD.

The switching monitoring unit 20 senses the number of repetitions of ON / OFF of the wall switch and is connected in series with the power supply, that is, the output of the rectifying unit 10, and is connected to the CLK of the controller (IC) (R1) and a resistor (R2), so that the voltage applied from the rectifying part (10) is appropriately lowered to be inputted to the CLK of the controller (IC).

The resistor R1 and the resistor R2 are connected in series and the resistor R1 is connected to the output of the rectifier 10 and the resistor R2 is grounded and the connection line of the resistor R1 and the resistor R2 is connected to the controller IC is connected to the CLK of the resistor R1 and the resistor R2 so that the CLK signal is input to the CLK through the resistor R1 and the resistor R2 and CLK supplies the voltage input from the bridge rectifier BR to the resistor R1 And the voltage signal divided by the voltage-dividing unit.

The voltage Vout input to the CLK of the controller IC is determined by the resistor R1 and the resistor R2 according to the output voltage Vin of the rectifying section 10 as shown in the following equation, If Vout becomes equal to half of Vin and Vout decreases and Vout increases when resistor R1 and resistor R2 increase in the same state, when Vout becomes equal to Vout and R2 increases, .

Vout = [R2 / (R1 + R2)] Vin

The output of the rectifier BR of the rectifying unit 10 is input to the HV of the controller IC through the current applying unit 30 and the current applying unit 30 is connected to the bridge rectifier BR ) And the middle of the connection line of HV and ground.

When the wall switch is turned on, AC power is applied to the bridge rectifier BR of the rectifying unit 10 so that the AC is rectified by the bridge rectifier BR and applied to the HV of the controller IC to operate the circuit .

The condenser C1 of the current applying unit 30 bypasses the harmful electromagnetic wave signal remaining in the current applied from the rectifying unit 10 to the ground to stabilize only the required power supply, And is inputted to the drain of the MOSFET transistor Q1 of the switching unit 40. [

The turn-on threshold of the controller (IC) is 15.5V and the turn-off threshold is 9.5V. When VDD exceeds 15.5V, all internal circuits of the controller (IC) are activated. When VDD falls below 9.5V, ) Interrupts the driver output while keeping the dimming function active, and when VDD drops below 4.0V, the control logic of the controller (IC) resets to shutdown mode.

The switching unit 40 includes a MOSFET transistor Q1 for applying a current to the LED 60 by applying a current to the transformer 60 in an on state of the wall switch, The gate of the MOSFET transistor Q1 is connected to the DRV of the controller IC and the source of the MOSFET transistor Q1 is connected to the current setting part 50).

The DRV of the controller IC is controlled such that a Totem-Pole output of the DRV is applied to the gate of the MOSFET transistor Q1 to drive the MOSFET transistor Q1, and the MOSFET transistor Q1 Is connected and the current outputted from the rectifying section 10 is conducted to the drain of the MOSFET transistor Q1 through the source of the MOSFET transistor Q1 and transformed by a transformer T1 of the transforming section 62, .

The totem-pole output is connected to the output terminal of the current application section 30 and the output terminal of the controller IC through a power supply terminal, that is, a power supply terminal and a ground terminal applied from the rectifying section 10, So that the voltage can be matched to the logic input voltage level and can function as a gate having an inverting function without a pull-up resistance at the output. When the totem-pole output is high, the output voltage is 3.6 to 3.8 V, which is lower than the supply voltage (5 V). However, the totem-pole output is logically recognized as "1 ".

The present invention adopts a totem-pole structure to apply a large current to the LED regardless of the logic level of the output, to obtain a high-speed operation that is fast in rising and falling of the signal, The impedance is small, the waveform distortion and noise are less influenced, and the dimming can be performed quickly according to the ON / OFF of the wall switch.

Since the Totem-Pole structure actively operates both Low and High, the speed can be increased and several inputs can be connected to one output. Therefore, the invention can be applied to a fan-out (Fan Out), and dimming is performed in three stages.

In the dimming of the three stages of the present invention, each time the wall switch is turned on / off, the controller IC sequentially adjusts the illuminance of the LEDs in order of 100%, 42.7%, and 14.6% The dimming is controlled.

The starting circuit of the controller (IC) triggers a pulse train of 45 microseconds (Microsecond = 1 / 1,000,000) to turn on the MOSFET transistor Q1 via DRV.

The current setting unit 50 receives the current of the switching unit 40 and stabilizes the voltage of the current to set an LED current and supplies the current to the switching unit 40, that is, between the output of the MOSFET transistor Q1 and the ground And a resistor R3 (not shown) which is provided between the drain of the MOSFET transistor Q1 and the input of the transformer 60, and the Zener diode D5 and LED And the connection line of the MOSFET transistor Q1 and the Zener diode D5 is connected to the CS of the controller IC.

 When the LED is short-circuited or the output terminal of the LED is short-circuited to ground, the current flowing through the transformer T1 of the transformer 60 rapidly increases. At this time, the current of the current setting unit 50 is 1.16 When the threshold of V is reached, it senses it and stops the output driver of the controller (IC) to protect the circuit.

Since the zener diode D5 and the load resistor R3 are connected in parallel to each other in the circuit so that the parallel arrangement has the same voltage, the current setting unit 50 has the same voltage as the zener diode D5 in the resistor R3, And the current inputted to the current setting unit 50 is transmitted to the transformer 60, that is, the transformer T1 by the Zener diode D5.

When the CS senses the current input to the current setting unit 50, the controller IC applies the internal reference voltage ADJ to calculate a compensation signal, and the compensation signal is generated by a Saw-Tooth Oscillator And the MOSFET transistor Q1 is turned off when the compensated signal crosses the triangular wave signal.

This action continues until the current flow approaches zero. When the voltage polarity of the transformer T1 is changed, the signal of ZCD (Zero-Current Detection) is turned on again for the next cycle of the MOSFET transistor Q1.

The zener diode D5 has a structure in which a cathode is connected to the positive side of the direct current output from the MOSFET transistor Q1 and an anode is connected in parallel to the ground, The voltage to the + current of the capacitor is lowered, regulated and stabilized.

The Zener diode D5 controls a specific voltage to flow a current in a breakdown direction. When a certain reverse voltage is applied, the Zener diode D5 lowers the resistance by flowing a current to prevent the voltage of the current setting unit 50 from rising.

If the Zener diode D5 is not energized when a normal voltage is applied to the secondary winding of the transformer T1 of the transformer 60 and the voltage of the zener diode D5 exceeds a predetermined voltage to the secondary winding of the transformer T1, T1 is turned on when an overvoltage is generated in the secondary winding of the transformer T1 and the overvoltage current is bypassed to the ground through the Zener diode D5 so that the voltage of the DC current of the secondary winding of the transformer T1 is not increased So that the secondary winding voltage is stabilized.

The Zener diode D5 is configured such that the direct current which is the initial power applied from the MOSFET transistor Q1 of the switching unit 40 has a fluctuation of the input voltage or an unstable voltage of the voltage due to the current spike due to the switching of the MOSFET transistor Q1 Thereby supplying the transformer T1 with a stable current, thereby improving the reliability of the product.

The voltage of the Zener diode D5 can be adjusted by setting the Zener diode D5 to a voltage value indicating a constant value, that is, a Zener voltage, irrespective of the magnitude of the direct current applied from the switching unit 40. [

When the current supplied to the transformer T1 is not supplied to the LED through the overvoltage, that is, when the voltage is supplied to the set voltage, the Zener diode D5 is not turned on and the DC current of the set voltage is supplied to the Zener diode D5. As shown in Fig.

The Zener diode D5 is designed so that the breakdown voltage is greatly lowered in order to obtain a constant voltage, and is constituted by a constant voltage source for stabilizing the voltage supplied to the circuit.

When a constant voltage drop occurs in the Zener diode D5 and the input voltage exceeds the Zener voltage, the current input to the LED in the current setting unit 50 is within the constant voltage regulation range. The reverse resistance is rapidly reduced, so that the Zener current flows from the secondary winding of the transforming unit 60 to the Zener diode D5.

Therefore, a voltage drop occurs in the MOSFET transistor Q1. When the voltage drop reduces the input voltage to the resistor R3 and the current of the Zener diode D5 rapidly increases along the Zener voltage curve, The input voltage to the resistor R3 is kept substantially constant since the voltage drop in the MOSFET transistor Q1 is large.

Since the Zener diode D5 uses a reverse voltage to secure an unstable circuit or make a reference voltage, it is usually reverse to the diode, that is, reverse bias is used. When the Zener voltage (breakdown voltage) Down phenomenon occurs and a reverse current flows rapidly.

The resistor R3 is a load resistor configured to limit the maximum allowable current to apply the current stabilized by the zener diode D5 to the transformer 60. The output voltage is a zener voltage of the zener diode D5 The output voltage of the resistor R3 increases in proportion to the output voltage of the MOSFET transistor Q1, that is, the input voltage, and then the output voltage of the resistor R3 remains stable even when the input voltage continues to increase.

The transformer 60 receives the current of the current setting unit 50 and converts the voltage of the transformer 60 to a current suitable for lighting the LED to transmit the voltage to the LED, And a transformer T1.

The secondary winding input of the transformer T1 is connected to the output of the resistor R3 of the current setting part 50 and the output of the secondary winding is connected to the smoothing part 90 and the primary winding input is connected to the controller IC, The output of the primary winding is grounded, and the transformer T1 boosts the current of the current setting unit 50 and outputs it.

VDD of the controller IC supplies power to the primary winding of the transformer T1 and the controller IC performs the overvoltage protection and clamping function of VDD and when the VDD voltage exceeds 27.0 V, Turn off the power.

The latch-up operation mode of the controller (IC) does not allow the circuit to rise above 15.5V without restarting the circuit until the VDD voltage drops to 9.5V, and when an abnormal condition occurs and reaches 30.0V, the VDD voltage is 30.0 V is clamped.

The constant voltage setting unit 80 supplies power of the primary winding to the transformer T1 of the transforming unit 60 and stabilizes the input voltage of the primary winding and supplies the stabilized voltage to the transformer A zener diode D6 and a capacitor C3 connected between the transformer and the Zener diode D6.

The capacitor C3 bypasses the harmful electromagnetic wave signal of the current outputted from the VDD to the ground to amplify only a necessary signal. That is, the capacitor C3 removes the noise included in the voltage applied to the VDD, The current is rectified and planarized.

The capacitor C3 charges and discharges a low voltage current applied from VDD and applies an appropriate voltage from the transformer T1 of the transformer 6 to VDD. This operation can control the input voltage of the appropriate Zener diode D6 according to the charging capacity of the capacitor C3, and thus has the same voltage as the Zener diode D6, and thus becomes a constant voltage circuit having a constant voltage.

The supply voltage of the VDD is 17.0 to 23.0 V, and the operation power of the controller (IC) is calculated as a product of a voltage of VDD and a current input to the VDD. When the load of the LED The control loop of the controller tries to regulate the rated current flowing through the LED and the output voltage rises and the voltage reflected from the winding of the transformer T1 increases so that the voltage of VDD increases , The controller (IC) is not restarted until it rises above 15.5V when VDD falls below 9.5V, and the VDD voltage is clamped at 30.0V when the VDD voltage reaches 30.0V.

The overvoltage sensing unit 70 senses an overvoltage input to the primary winding of the transformer T1 of the transformer 60 and outputs the ZCD of the controller IC and the output of the constant voltage setting unit 80 and the output of the transformer T1 And a resistor R4 connected to the input of the primary winding.

The resistor R4 passes the overvoltage of the power source applied from the constant voltage setting unit 80, that is, the overvoltage input from the constant voltage setting unit 80 to the transforming unit 60, to be inputted to the ZCD of the controller IC.

 The ZCD is a terminal for zero current detection and output overvoltage detection. When a zero current detection and an output overvoltage are input to the ZCD, the blank-off time of the entire circuit is lengthened to decrease the operating frequency so that the MOSFET transistor Q1 Turn off.

When the controller IC is turned on, the ZCD receives a positive-swing voltage signal. When the positive swing voltage signal exceeds 1.5 V, the internal circuit of the controller (IC) connected to the ZCD is blanked After the Blank-Off time has elapsed, the controller (IC) senses that the ZCD voltage falls to 1.0 V. The controller (IC) When the MOSFET transistor Q1 is turned on, the controller IC interrupts the switching operation and the ZCD is clamped to 3.0V.

Since the smoothing unit 90 is formed between the transforming unit 60 and the LED and the DC output from the transformer T1 of the transforming unit 60 is a ripple-rich pulsation, The circuit smoothens to a smoother direct current, reducing the size of the ripple and regulating the DC level of the power supply.

The smoothing unit 90 includes a capacitor C4 configured in parallel with the direct current power source because the lighting voltage of the LED is low so that the direct current level of the power source that the condenser C4 is input to the LED Thereby absorbing a ripple, which is a regular modulation of the DC voltage.

The capacitor C4 is connected in parallel with the output of the secondary winding of the transformer 60 and the input line of the LED and the ground and outputs the harmful electromagnetic wave signal which remains in the current applied in the secondary winding of the transformer 60 By-pass to ground to amplify only the required signal and input it to the LED.

The compensator 100 is connected to the COMP of the controller IC to provide a stable frequency response of the error amplifier output in the controller IC and a grounded capacitor C2 is configured and the capacitor C2 is connected to the controller The harmonic electromagnetic signal remaining in the current applied to the error amplifier in the IC is bypassed to the ground to rectify and planarize the current so that only the necessary signal is amplified.

The controller (IC) integrates the compensated bleed-off time according to the voltage signal of COMP and reduces the signal of COMP when the input voltage is high or the load is lighter and the longer blank- -Off) time occurs, so that the operating frequency is reduced and the efficiency is improved.

A plurality of LEDs are connected in series to the LED module 110 and an LED is supplied with the output current of the secondary winding of the transforming unit 60, that is, the current output from the smoothing unit 90, do.

Describing the three-step dimming with reference to the dimming control flowchart of the present invention,

When the AC power is first supplied to the circuit of the present invention by the ON / OFF of the wall switch, the controller (IC) operates after VDD of the controller (IC) exceeds 15.5 V and the controller (IC) The LED current is determined by the resistor R3 and the internal reference voltage ADJ of the controller IC is set to 239 mV and the MOSFET transistor Q1 ) Are turned on and turned off during normal operation. Turning off the wall switch and removing AC power will reduce the VDD voltage.

On the other hand, if the CLK signal detects a missing AC power signal for 30mS before it falls below 9.5V at VDD of the controller (IC), the drive output is blocked in DRV and the controller (IC) maintains the 2-step dimming control function , The controller (IC) adjusts the internal reference voltage (ADJ) to 102mV to reduce the LED from 100% to about 42.7% when the AC power is applied again before the VDD voltage of the controller (IC) drops below 4.0V. 2-step dimming control is started.

When the VDD voltage of the controller IC falls below 4.0 V, the controller IC continues the maximum illuminance of the LED, that is, 100% dimming. When the dimming of the LED is changed to 14.6% To turn off the power to the circuit.

When the wall switch is turned off, when the CLK detects a missing AC power signal before the VDD falls below 9.5 V, the drive signal is turned off in the DRV and the controller (IC) operates without output drive signal, If the dimming control function is maintained and AC power is applied again before VDD drops below 4.0V, the controller (IC) adjusts the internal reference voltage (ADJ) to 35mV so that the illuminance of the LED (LED) 3-step dimming control of the LED (LED) which is reduced to 10%.

When the VDD voltage drops below 4.0 V, the controller IC continues to provide the condition of the maximum illumination of the LED when the AC power is supplied again, and the circuit is operated so that the LED is 14.6% When the controller (IC) receives another Off / On command of the AC power source, the control circuit returns to the maximum illumination state of the LED and continues to turn on / The AC signal repeats the illumination level setting described above.

The terms or words used in the specification and claims of the present invention are not to be construed in a conventional or dictionary sense and the inventor can appropriately define the concept of the term in order to explain its invention in the best way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

As described above, the embodiments described in the description of the present invention and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. It is possible to make various modifications within the limit.

It is therefore to be understood that within the scope of the appended claims, the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

10: rectification part 20: switching monitoring part
30: current application part 40: switching part
50: current setting unit 60:
70: Overvoltage detection unit 80: Constant voltage setting unit,
90: Smoothing unit 100: Compensation unit
110: LED module BR: Bridge rectifier
IC: Controller

Claims (8)

A multistage dimming control device for an LED lighting using a wall switch having a dimming device,
The dimming apparatus includes a switching monitoring unit for detecting the number of times the wall switch is turned on / off, a switching unit for applying power from the rectifying unit to the LED, And a transformer (T1) that receives the current of the current setting unit and converts the current into the lighting current of the LED (LED) and transmits it to the LED (LED) A stabilization of the input voltage of the primary winding of the transformer and grounding between the controller (IC) and the Zener diode (D6), and the stabilization of the input voltage of the primary winding of the transformer and the noise To-oscillator (SAW) configured to supply power to the primary winding of the transformer (T1), and a condenser (C3) for removing the capacitor Swiss (LED) is illuminated by sequential step dimming illumination in order of 100%, 42.7%, and 14.6% each time the LED is turned on / off repeatedly. When the output overvoltage of the zero current detection and overvoltage detection unit is inputted, the blank-off time of the controller (IC) circuit is lengthened to turn off the MOSFET transistor Q1, and the current When the CS is detected, the internal reference voltage (ADJ) is applied to calculate the compensation signal and the compensation signal And a controller (IC) for calculating a compensation signal compared with the internal triangular wave signal generated by the triangular wave oscillator.
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