KR20120008307A - Led lamp module - Google Patents

Abstract

PURPOSE: An LED lamp module is provided to obtain illuminance, which is required for illumination, with minimum power consumption by driving an LED with a stable direct current voltage having no loss of a 220V AC power source. CONSTITUTION: An AC filter part(2) eliminates a noise component from an AC input. A rectifying part(4) changes an AC voltage into a direct current voltage. A power factor correction part(6) performs the power factor correction of an output voltage of the rectifying part and prints out the output voltage to a specified voltage. A DC-DC controller(8) controls the output signal of the power factor correction part without loss. An LED group(10) is arranged to be parallel or serial.

Description

LED lighting module {LED lamp module}

TECHNICAL FIELD The present invention relates to an LED lighting module, and more particularly, to an LED lighting module exhibiting high illumination at low power consumption, and particularly to an LED lighting module suitable for use as a circle type lighting lamp.

LED lighting lamps, which are spotlighted as energy-efficient and eco-friendly lighting sources, must be driven by low DC voltage. Therefore, a direct DC 220V AC power source presents many problems. Equipped with power.

The DC voltage driving device rectifies the AC by stepping down the AC voltage of the input side with a transformer and outputs the DC low voltage required for driving the LED.

Examples of the DC low voltage driving device are known as an AC-DC converter, a switching mode power supply (SMPS), and the like, and employing these devices can drive a plurality of LEDs in parallel, thereby obtaining a stable lighting effect.

However, since the DC voltage driving device is relatively bulky, it is virtually impossible to replace the ballast of the fluorescent lamp and the equipment cost is expensive, thus causing a lot of trouble to replace the existing fluorescent lamp with the LED lamp.

The above problem can be solved by developing a driving circuit that does not require a transformer or a switching mode power supply, but in this case, another problem such as a ripple of a current, a sudden current due to a load change, and a voltage change must be solved.

The LED lamp power device disclosed in the following Patent Literature 1 compensates the power factor by passing a direct current obtained by rectifying alternating current through a booster, and proposes a circuit which turns on by directly applying a large number of DC voltages to a series of connected LED groups through a branch circuit. Thus, a configuration is disclosed in which an LED is driven by a stable power supply without the above-described transformer.

In addition, Patent Document 2 discloses a method of arranging an LED lighting device and a driving circuit driven by an AC power source, wherein the output voltage of the LED driving circuit part rectified and supplied by AC is divided by the LED driving voltage. Disclosed is a configuration in which LEDs are connected in series in quantity and the LED group is turned on by the rectified output voltage.

The LED lighting driving circuit disclosed in Patent Document 3 rectifies AC power to DC and supplies a portion of the LED module to the LED module with a constant current compensated for power factor while feeding back part of the LED module so that the constant current is continuously supplied to the LED module. It is disclosed to maintain a constant, reduce the heat generation to increase the efficiency and to extend the life of the LED module.

The LED lighting circuit disclosed in Patent Literature 4 supplies a DC array, in which the pulsation is removed by a capacitor from the output of the rectifier converting alternating current into direct current, to a plurality of arrayed LED groups, and a zener diode for every LED constituting the LED group. Disclosed is a configuration in which a constant current circuit is added to maintain the power supplied to the LED group while maintaining a constant voltage even when any LED is opened in parallel.

Korean Patent Publication No. 10-2009-0056025 Korean Patent Publication No. 10-2009-0092215 Korean Patent Registration No. 10-0877521 Korean Patent Registration No. 10-867361

As described above, a known LED lighting driving circuit basically combines one LED group by connecting the LEDs in series by a value obtained by dividing AC into DC and power factor correction divided by the LED driving voltage. Since the LED group is driven, there is an advantage that the LED lamp can be driven without a voltage drop using a transformer.

In addition, if the above-described advantages are modularized in the same form as a conventional bar type fluorescent lamp, there is an advantage that the fluorescent lamp can be replaced with an LED lamp immediately without enormous capital investment.

However, even in the known LED lighting driving circuit, the problem of having a heat dissipation means in order to solve the heat generated by the LED is not solved.

The present inventors have proposed a method to solve the above problems through the Korean Patent Application No. 10-2010-0015227, LED lighting module.

The solution proposed by the present invention is to remove the noise component of the AC input with the AC filter to rectify the power supply to DC voltage and compensate for the power factor so that the output is at a constant voltage, and the output signal is controlled by the DC-DC control unit without loss. The LED group is applied to the power of the LED group arranged, but the LED group is arranged in three rows and repeatedly turned off by a predetermined period by the switching controller, and the effect of flickering at 60 Hz as in the conventional fluorescent lamp, and turns off in a constant cycle It is possible to expect the effect of reducing power consumption.

However, the LED lighting module proposed by the present invention has a configuration in which the LED arrays arranged in three rows are turned off at regular intervals, respectively, so that the overall illumination is low and ultra-high brightness LEDs are developed to obtain unobstructed illumination.

Therefore, the object of the present invention can be turned on without having a facility such as a transformer or a switching mode power supply, and also to keep the lighting state stable without heat dissipation means, it is simple and inexpensive to install without the hassle of installing a ballast like a conventional fluorescent lamp. It is to provide an LED lamp module that can be.

The present invention for realizing the above object, the AC filter unit for removing noise components from the AC input; A rectifier for converting an AC voltage into a DC voltage; A power factor correction unit configured to output a constant voltage by compensating the output voltage of the rectifier unit; A DC-DC controller for controlling the output signal of the power factor correction unit without loss; It consists of a group of LEDs arranged in a number.

In the above-described configuration, the AC filter unit includes a varistor, a resistor, a condenser, and a common noise filter connected in parallel between AC input lines, the rectifier unit includes a bridge rectifier and a TVS diode, and the power factor correction unit is directly connected between both output terminals. A first diode, a first diode, and a third diode, a first diode, and a first diode, a second capacitor, and a third diode directly disposed between a connection point of the second diode and the second capacitor at a connection point of the first capacitor and the first diode. And a second resistor and a third capacitor connected in parallel between a resistor and the output terminal, wherein the DC-DC controller includes a buck converter, a field effect transistor, an inductor, a fourth diode and a fourth capacitor, and a fourth resistor, a fifth capacitor. The resistor and the sixth resistor can be configured.

The LED lamp module of the present invention is to drive the LED at a stable DC voltage without loss from the 220V AC power source without dropping the voltage through a conventional transformer or switching mode power supply, so that the illumination required for lighting with minimum power consumption We can secure enough.

In addition, since the power consumption is reduced, the amount of heat generated when the LED array is driven is also reduced, and there is an advantage that the LED can be turned off by a natural cooling method that does not depend on a separate heat dissipation means.

In addition, because the circuit configuration is simple, the manufacturing cost is low, and the structure does not easily occur during use.

1 is a circuit configuration diagram related to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying circuit diagram.

Referring to FIG. 1, the LED lamp module of the present invention includes an AC filter unit 2 for removing a noise component from an input AC voltage, a rectifying unit 4 for converting an AC voltage to a DC voltage, and a power factor to compensate A power factor correction unit 6 for outputting an output signal as a voltage, a DC-DC control unit 8 for controlling the voltage of the output signal without loss, and an LED group 10 arranged in a plurality of LEDs.

 The AC filter unit 2 is composed of a filter circuit in which a varistor Z21, a resistor R21, and a capacitor C21 are connected in parallel between AC input lines, and an overvoltage (surge high voltage noise) equal to or higher than the rated voltage flows through the AC input terminal. When it comes in, the varistor (Z21) bypasses and prevents damage of the device connected to the input side, and general external noise that cannot be prevented is blocked by the filter action by the resistor (R21) and the capacitor (C21). Protect the AC input.

The rectifier 4 is composed of a bridge rectifier 41 formed of four diodes and a TVS diode TVS41 that is connected to bypass the output overvoltage between the output terminals thereof.

The power factor correction unit 6 is directly connected between the first capacitor C61 and the first diode D61, the second diode D62 and the second capacitor C62, and the first resistor R61 and the output terminal. And a second resistor (R62) and a third capacitor (C63) arranged in parallel separately from each other, wherein the second diode (D62) and the second capacitor at the connection point of the first capacitor (C61) and the first diode (D61). A third diode D63 is connected across the connection point of C62, and a second resistor R62 and a third capacitor C63 are arranged in parallel between the first resistor R61 and the output terminal. It becomes one configuration.

The first capacitor C61 and the first diode D61, and the second diode D62 and the second capacitor C62 constitute a bridge circuit between both output terminals, and a third diode D63 directly connected therebetween. ) And the first resistor R61 perform a power factor correction of the output voltage.

The DC-DC control unit 8 is a buck converter BC interposed at the output terminal, a field effect transistor FET whose gate is connected to the output side of the buck converter BC, and a drain of the field effect transistor FET. A fourth inductor L81 to be connected, a fourth diode D84 and a fourth capacitor C84 which exhibit a reflow action of a signal, and a fourth resistor R84 connected to a source of the field effect transistor FET; A fifth resistor R85 and a sixth resistor R86 which feeds back a signal to the buck converter BC are provided, and a fifth capacitor C85 is interposed between the ground lines of the buck converter BC.

The buck converter (BC) is an IC chip that can be programmed in a constant frequency or constant time open mode, and has a linear regulator of 8 to 450 V and a PWM dimming function. Width modulation and oscillation for the same.

The LED group 10 arranged at the output terminal of the DC-DC control unit 8 is arranged in a structure in which a plurality of LEDs are connected in series, and more preferably, a combination of R, G, and B LEDs into one group of LEDs. It is set as the structure which connected many chip LEDs in series.

The quantity of LEDs arranged in the LED group 10 may be set to a value calculated by dividing the voltage output from the DC-DC controller 8 by one LED driving voltage.

Next, an operation relationship of the LED lamp module of the present invention will be described.

배가 되므로, 예로서 220V 교류전압은 약 310V의 직류전압으로 된다.AC power protected by the stabilized voltage and noise-free signal passing through the varistor (Z21), resistor (R21), condenser (C21) in the AC filter unit 2 passes through the bridge rectifier (41) of the rectifier (4) The output voltage is converted into

As a result, the 220V AC voltage becomes a DC voltage of about 310V, for example.

On the other hand, the TVS diode (TVS41) is input to the output of the bridge rectifier 41, if a certain level of overvoltage, for example a voltage of 350V or more necessary for circuit operation is input by bypassing the internally to protect the other devices after the input side from damage Give it.

The voltage output from the bridge rectifier 41 to a direct current of 150 V is sent out as a pulse current of 310 V through the power factor correction unit 6.

In more detail, when the output of the bridge rectifier 41 peaks, the charging current is in series through the first capacitor C61-the third diode D63-the second resistor R62-the second capacitor C62. The first and second capacitors C61 and C62 are charged by being connected.

In this case, the first and second capacitors C61 and C62 are preferably set to 1/2 of the peak value of the rectified voltage.

On the other hand, when the output of the bridge rectifier 41 is greater than or equal to the peak value, the output is directly applied to the load, but the peak value of the output voltage drops to 1/2 due to the action of the load. In this case, the first capacitor C61 and the second capacitor are reduced. The discharge is started by the C62 being connected in parallel to the load through the first diode D61 and the second diode D62. The output voltage is supplemented by the discharge and the phase difference between the voltage and the current is minimized. The power factor is then output at the compensated voltage.

In the state where the circuit is not operating, the voltage charged in the first capacitor C61 and the second capacitor C62 is discharged through the second resistor R62 to ensure the safety of the circuit.

The power factor corrected output by the power factor correction unit 6 is applied to the LED group 10 by the DC-DC controller 8 without output loss.

In the DC-DC control unit 8, the buck converter BC outputs a DC voltage at a predetermined duty ratio through pulse width modulation to switch the field effect transistor FET so that lossless power is applied to the LED group 10. .

More specifically, when the buck converter BC drives the applied voltage by switching the field effect transistor FET at a frequency of approximately 100 KHz, the buck converter BC turns on and off the inductor L81 as a result. Voltage is supplied to the LED group 10 through a set value of the fourth resistor R84 and the fifth resistor R85 connected to the source terminal of the field effect transistor FET. The current can be controlled to be applied at a constant value.

In other words, when the field effect transistor FET is turned on, the output component is accumulated by the inductor L81 and the fourth capacitor C84. When the field effect transistor FET is turned off, the output component is accumulated in the inductor L81. The AC component generates a counter electromotive force to charge the fourth capacitor C84 through the fourth diode D84, and as the voltage charged in the fourth capacitor C84 is discharged, the output voltage is applied to the LED group 10. do.

In the present invention, the connection of the output of the ground terminal VDD terminal of the buck converter BC to the LD terminal and the PWM terminal is to prevent the pulse width modulation operation and the linear dimming operation of the buck converter BC from appearing. To this end, a fifth capacitor C85 is disposed at the ground terminal as a filter so that a stable voltage is applied to the VDD terminal and the LD terminal.

Due to the circuit configuration described above, the actual voltage applied to the LED group 10 is lower than the output of the power factor correction unit 6, which results in a small current consumption of the LED lamp module and maximum illuminance at the time of lighting. .

2: AC filter part Z21: varistor
R21: resistor C21: capacitor
4: rectifier 41: bridge rectifier
TVS 41: TVS diode 6: power factor correction unit
C61: first capacitor D61: first diode
D62: second diode C62: second capacitor
D63: third diode R62: second resistor
R63: third resistor C63: third capacitor
8: DC-DC control unit BC: buck converter
FET: Field Effect Transistor L81: Inductor
D84: fourth diode C84: fourth capacitor
C85: second capacitor R84: fourth resistor
R85: fifth resistor R86: sixth resistor
10: LED County

Claims (5)

An AC filter unit 2 for removing noise components from an AC input;
A rectifier 4 for converting an AC voltage into a DC voltage;
A power factor correction unit (6) for power factor correction of the output voltage of the rectifier (4) to output a constant voltage;
A DC-DC control unit 8 for controlling the output signal of the power factor correction unit 6 without loss;
LED group 10 is arranged in parallel;
LED light module consisting of. The method according to claim 1,
The AC filter module 2 includes a varistor (Z21), a resistor (R21), a capacitor (C21), and a common noise filter (F21) connected in parallel between AC input lines. . The method according to claim 1,
The rectifier (4) is a LED lamp module, characterized in that it comprises a bridge rectifier (41), and the TVS diode (TVS41) connected between the output terminal thereof. The method according to claim 1,
The power factor correction unit 6 includes a first capacitor C61, a first diode D61, a second diode D62, a second capacitor C62, and the first capacitor C61 which are directly connected between both output terminals. ) And a third diode D63 disposed directly between a connection point of the second diode D62 and the second capacitor C62 at a connection point of the first diode D61 and between the first resistor R61 and the output terminal. An LED lamp module comprising a second resistor (R62) and a third capacitor (C63) connected in parallel. The method according to claim 1,
The DC-DC controller 8 includes a buck converter BC, a field effect transistor FET, an inductor L81, a fourth diode D84 and a fourth capacitor C84, and a fourth resistor R84, LED lighting module comprising a resistor (R85), the sixth resistor (R86).

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