KR20110055819A - The led lamp of nonpolar union - Google Patents

Abstract

PURPOSE: A nonpolar LED lamp for DC power including a switch type LED driver module is provided to secure the stability of an LED lamp by reducing an initial inrush current. CONSTITUTION: A nonpolar LED lamp(100a) for DC power includes a fluorescent lamp structure to make an LED lamp emit light. The LED lamp is connected between a DC power terminal and an LED substrate. A nonpolar LED lamp(100b) for DC power has a bulb lamp structure. A nonpolar LED lamp(100) for DC power includes a switch type LED driver module. An LED driver module connects the DC power terminal to the LED substrate regardless of polarity and generates a PWM dimming signal. The LED driver module controls the current mode on the LED substrate.

Description

Non-polar LED lamp for DC power supply with switch type LED driver module {THE LED LAMP OF NONPOLAR UNION}

The present invention connects a connection between a DC power terminal (DC) terminal having a positive (+), (-) polarity and an LED substrate regardless of the positive (+) and (-) polarity, and generates a PWM dimming signal to the LED substrate. The present invention relates to a non-polar LED lamp for direct current power supply (DC) in which a switch type LED driver module for controlling a flowing current mode is configured.

Unlike the AC power source AC, the DC power source DC has positive and negative polarities. In most cases, a certain polarity is connected to a certain wire, but in some sites where DC power is used, the polarity is often changed.

For example, among the lamps mounted on the vehicle, headlights, indoor lights, trunk lights, vehicle door lights, brake lights, and blinking lights are currently being replaced by LED lamps, and such vehicle LED lamps are currently being released with polarity.

That is, when mounted on the vehicle should be mounted according to the polarity of the power terminal of the vehicle.

At this time, when a general LED lamp is to be installed and used, not only the lamp may be broken, but the lamp may be broken and a problem that cannot be used may occur.

In order to solve this problem, Korean Patent Application Publication No. 20-2008-0003979 discloses a bridge diode circuit in which four diodes are bridged; An LED connected to the bridge diode; A lamp power terminal which is exposed to the outside and connected to a power terminal of the vehicle; In this case, the bridge diode circuit includes a common contact between the first diode and the second diode of the bridge diode and a common contact between the third diode and the fourth diode, respectively; A nonpolar LED lamp for a vehicle in which a common contact of the first diode and the third diode of the bridge diode and a common contact of the second diode and the fourth diode is connected to the anode and the cathode of the LED, respectively, has been presented.

This is only a configuration that is applied only to the AC power source AC, there is a problem that the circuit is overloaded by the initial inrush current applied to the LED lamp from the DC power source (DC) terminal when connected to the DC power source (DC).

In addition, it is difficult to control the current mode flowing to the LED lamp, there is a problem that the user must always set the current mode flowing to the LED lamp in accordance with the reference setting value in a programmatic way.

In order to solve the above problems, the present invention can be freely connected regardless of the (+) and (-) polarity of the DC power supply, and generates a PWM dimming signal to control the current mode flowing to the LED substrate. It is possible to reduce the initial inrush current applied to the LED lamp from the DC power terminal, to ensure the stability of the LED lamp life and to supply the power stably. To provide a non-polar LED lamp for the purpose.

In order to achieve the above object, a non-polar LED lamp for DC power supply (DC) configured with a switch type LED driver module according to the present invention is

It consists of a non-polar LED lamp for direct current power (DC) that is connected between a DC power supply terminal (+) and a negative polarity (-) polarity that changes from time to time and the LED board.

The non-polarity LED lamp for DC power (DC) is connected to the DC power supply terminal and the LED substrate irrespective of the (+), (-) polarity, and generates a PWM dimming signal to the current mode flowing to the LED substrate It is achieved by being configured to include a switch type LED driver module to control the.

As described above, in the present invention, regardless of the (+) and (-) polarity of the DC power supply (DC) can be connected freely, and can generate a PWM dimming signal to control the current mode flowing to the LED substrate In addition, by reducing the initial inrush current applied to the LED lamp from the DC terminal (DC) terminal, the stability of the LED lamp life can be improved by more than 90%.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing the components of a non-polarity LED lamp for DC power supply (DC) is configured a switch type LED driver module according to the present invention, Figure 2 is a fluorescence configuration is configured a switch type LED driver module according to the present invention It relates to a perspective view showing the components of a non-polar LED lamp for direct current power (DC) having a lamp structure, Figure 3 is a non-polarity for direct current power (DC) having a fluorescent lamp structure consisting of a switch type LED driver module according to the present invention The present invention relates to an exploded perspective view showing the components of the LED lamp, Figure 4 is a perspective view showing the components of a non-polar LED lamp for direct current power (DC) having a bulb lamp structure configured with a switch type LED driver module according to the present invention FIG. 5 shows components of a nonpolar LED lamp for direct current power supply (DC) having a bulb lamp structure in which a switch type LED driver module according to the present invention is constructed. It relates to an exploded perspective view.

As illustrated in FIG. 1, the nonpolar LED lamp 100 for direct current power (DC) according to the present invention includes a nonpolar LED lamp 100a for direct current power (DC) having a fluorescent lamp structure, and a direct current having a bulb lamp structure. It consists of the non-polarity LED lamp 100b for power supply DC.

As illustrated in FIGS. 2 and 3, the nonpolar LED lamp 100a for direct current power (DC) having the fluorescent lamp structure has a fluorescent lamp shape, and LED lamp sockets 110a are formed at both ends thereof. A diffusion cover 120a having a cylindrical long rod structure is formed along the LED lamp socket, and a rectangular switch type LED driver module 200 slides and fits along a fitting groove formed at one side of the diffusion cover. A plurality of high brightness light emitting LEDs are formed on the front and back of the LED driver module.

As shown in FIGS. 4 and 5, the nonpolar LED lamp 100b for direct current power (DC) having the bulb lamp structure has a bulb lamp shape, and is located in front of the LED point light source having a straightness. A plastic diffuser 110b for changing the shape is formed, and a switch type LED driver module 200 formed in a circular shape to be included in the plastic diffuser is formed, and has a cylindrical shape between the switched LED driver module and the aluminum heat dissipation extrusion part. It is installed, the heat dissipation unit 120b for dissipating heat remaining after the switch-type LED driver module heat dissipation secondary is formed, and is formed in a cylindrical shape so as to receive and protect the heat dissipation unit and aluminum heat dissipation extruded portion, therein The exterior injection unit 130b having a ventilation structure is formed so that draft air flows into the received heat dissipation cast unit and the aluminum heat dissipation extrusion unit, and the rear end surface of the exterior injection unit is formed. The aluminum heat dissipation extruder 140b is formed in a cylindrical through shape so as to be accommodated therein and includes a heat dissipation column, and radiates heat remaining in the heat dissipation column through a plurality of wings formed on the surface. Is formed.

The switch type LED driver module 200 is formed in a rectangular shape or a circular shape, and is configured on one side of a bidirectional LED substrate to connect a connection between a DC power terminal and an LED substrate regardless of positive and negative polarities. By controlling the current mode flowing to the LED substrate by generating a PWM dimming signal, as shown in FIG. 6, the fuse unit 210, the first EMI line filter unit 220, and the second EMI line filter unit are illustrated. 230, a bridge rectifier 240, a switch type LED drive IC 250, a high voltage current sensing IC 260, and a power switching MOSFET (Q3) 270.

The fuse unit 210 protects a circuit by blocking an overcurrent introduced by being applied to a DC power input terminal (DC IN), which is configured as a fuse.

The first EMI line filter unit 220 removes noise of the direct current power source (DC) passing through the fuse unit. The first EMI line filter unit 220 includes an inductor L2 and a capacitor C5.

The second EMI line filter unit 230 removes noise of the DC power supply DC transmitted through the DC power input terminal DC IN. The second EMI line filter unit 230 includes an inductor L3 and a capacitor C4.

The bridge rectifier 240 rectifies and directs the voltages output from the first EMI line filter unit and the second EMI line filter unit, and supplies a voltage to the switched LED drive IC which is subsequently connected. do.

The switch type LED drive IC 250 receives a voltage rectified from the bridge rectifier and performs linear dimming. The switch type LED drive IC 250 receives a voltage appearing across the power switching MOSFET Q3 from the high voltage current sensing IC and receives a feedback. After generating the PWM dimming signal within the duty ratio of 0 to 100% in accordance with the external control signal (TTL) at a value within the reference set value voltage, output it to the N-channel power MOSFET Q1 through the gate terminal. It consists of HV9911NG-G.

Here, the HV9911NG-G incorporates a cross-conductance op amp for better transient response to LED current, more accurate line and load regulation, and PWM dimming, and is often used in systems with multiple driver methods. It is synchronized to products that require multiple LED drivers to prevent low-harmonic oscillation, and has fixed frequency or fixed idle operation for use in a variety of converter methods such as boost, flyback, and jump types.

It features a slope compensation function that allows a wider operating range in a fixed frequency mode and an integrated voltage regulator that is compatible with both low and high voltage products.

As shown in FIG. 7, in the switch type LED drive IC according to the present invention, a high voltage rectified and rectified from a bridge rectifier is applied to a Vin terminal, and a capacitor C2 is connected to a reference voltage REF terminal. A resistor R13 is connected to set the reference voltage with an error within%, and to divide the voltage applied to the REF terminal to the IREF terminal that sets the output current level, and the high voltage current sensing IC to the output current feedback (FDBK) terminal. The output voltage (Vout) terminal is connected, the capacitor C7 is connected to the closed loop control (COMP) terminal, the resistor R9 is connected to the input current limit setting (CLIM) terminal, and the input current limit value is set through the program setting. An external control signal (TTL) is applied to the PWM terminal to generate a PWM dimming signal within a duty ratio of 0 to 100%, and is output to the N-channel power MOSFET (Q1), which is a switching element, through the gate terminal. The resistor R3 is connected to the cry correction (SC) terminal, and the voltage gradient is corrected through the resistor R3, and the gate output is turned off when an overvoltage of 1.25V or more flows through the OVP terminal. And sends a low signal to the FAULT terminal, turns on the gate output when the voltage below 1.25V flows to the overvoltage protection (OVP) terminal, and turns on the NUT power, which is a switching element, at the output short circuit protection (FAULT) terminal. When the MOSFET Q2 is connected and the voltage appearing across the power supply switching MOSFET Q3 for driving the LED module generates an output short and an output overvoltage, the N-channel power is turned off by turning off the drain terminal of the N-channel power MOSFET Q2. And to disconnect the MOSFET Q2 from the power switching MOSFET Q3 for driving the LED module.

In addition, the resistor R4 connected to the CS terminal is connected to the drain terminal of the N-channel power MOSFET Q1 to set a blanking time of 100 ns (min), and the gate of the N-channel power MOSFET Q1 is connected to the gate terminal. In connection with the terminal, it is configured to output a PWM dimming signal within a range of + 0.2A / -0.4A.

In addition, the resistor R2 is connected to the RT terminal, and the program is set to the constant frequency mode (Constant frequency mode), or is set to the constant off-time mode (Constant Off-time mode).

The N-channel power MOSFET Q1 is a switching element and is turned on according to a PWM dimming signal of a switched LED drive IC to apply a reference voltage for driving an LED substrate connected to a drain terminal to a source terminal, thereby switching power supply for driving an LED module. Transfer to the drain terminal of MOSFET (Q3).

At this time, the reference voltage for driving the LED substrate is rectified through the diode D1, smoothed through the capacitor C1, sensed through the resistor R5, and applied to the drain terminal of the power source switching MOSFET Q3 for driving the LED module.

The high voltage current sensing IC 260 senses a voltage (eg, 12V, 24V, 48V) appearing across the LED module driving power switching MOSFET (Q3), and when a value above a reference set voltage is detected, It is sent to the output current feedback terminal, which is composed of HV7800K1-G and has an operating voltage range of 8 to 450Vdc, and works with 12, 24 and 48V DC power system and 5V to 85V offline AC system. .

In addition, as shown in FIG. 7, the voltage across the power supply switching MOSFET Q3 for driving the LED module is sensed through the sensing resistor R5 and sent to the output current feedback terminal of the switched LED drive IC.

That is, the VIN terminal and the LOAD terminal are connected across the sensing resistor R5, and the output current feedback terminal of the switch type LED drive IC is connected to the VOUT terminal.

The LED module driving power switching MOSFET (Q3) 270 drives a plurality of high brightness power LED modules according to the PWM dimming signal transmitted from the switch type LED drive IC.

Hereinafter, a specific operation process of the non-polar LED lamp for DC power supply (DC) is configured with a switch type LED driver module according to the present invention.

First, plug the non-polar LED lamp for DC power supply (DC) configured with a switch type LED driver module according to the present invention to the LED lamp socket.

Subsequently, an overcurrent applied to the DC input terminal DC IN from the fuse of the switched LED driver module is blocked.

Subsequently, the noise of the DC power supply DC passing through the fuse part from the first EMI line filter part is removed.

Subsequently, the second EMI line filter unit removes noise of the DC power supply DC, which has been passed through the DC power supply input terminal DC IN.

Subsequently, a voltage is output from the first EMI line filter unit and the second EMI line filter unit through the bridge rectifier to rectify and direct the voltage to the switched LED drive IC.

Subsequently, linear dimming is applied by applying the rectified voltage from the bridge rectifying unit in the switch type LED drive IC, and the feedback voltage is input from the high voltage current sensing IC to the LED driving power switching MOSFET (Q3). To generate PWM dimming signal within the duty ratio 0 ~ 100% range according to the external control signal (TTL) at the value within the reference set value voltage and control it to be output through the gate terminal to the N-channel power MOSFET (Q1) do.

Subsequently, the N-channel power MOSFET Q1 is turned on in accordance with the PWM dimming signal of the switched LED drive IC to apply the reference voltage for driving the LED substrate connected to the drain terminal to the source terminal, thereby supplying the LED module driving power switching MOSFET Q3. To the drain terminal.

Subsequently, the high voltage current sensing IC senses the voltage across the power supply switching MOSFET (Q3) for driving the LED module through the sensing resistor R5 and sends a value to the output current feedback terminal of the switched LED drive IC when a value above the reference set voltage is detected. do.

Subsequently, the LED module driving power switching MOSFET Q3 drives the plurality of LED modules according to the PWM dimming signal transmitted from the switched LED drive IC.

1 is a block diagram showing the components of a non-polar LED lamp for DC power supply (DC) is configured a switch type LED driver module according to the present invention,

Figure 2 is a perspective view showing the components of a non-polar LED lamp for DC power supply (DC) having a fluorescent lamp structure is configured a switch type LED driver module according to the present invention,

Figure 3 is an exploded perspective view showing the components of a non-polarity LED lamp for DC power supply (DC) having a fluorescent lamp structure consisting of a switch type LED driver module according to the present invention,

Figure 4 is a perspective view showing the components of a non-polar LED lamp for DC power supply (DC) having a bulb lamp structure is configured with a switch type LED driver module according to the present invention,

5 is an exploded perspective view showing the components of a non-polar LED lamp for direct current power (DC) having a bulb lamp structure is configured with a switch type LED driver module according to the present invention,

6 is a block diagram showing the components of a switch type LED driver module according to the present invention;

7 is a circuit diagram showing the components of a switched LED driver module according to the present invention.

※ Brief description of reference numerals ※

100: non-polar LED lamp for DC power supply

100a: non-polar LED lamp for DC power supply with fluorescent lamp structure

100b: non-polar LED lamp for DC power (DC) having a bulb lamp structure

200: Switched LED Driver Module

210: fuse

220: first EMI line filter unit

230: second EMI line filter unit

240: bridge rectifier

250: Switched LED Drive IC

260: High Voltage Current Sensing IC

270 power supply MOSFET (Q3)

Claims (5)

A non-polar LED lamp (100a) for direct current power (DC) having a fluorescent lamp structure connected between the DC power supply terminal and the LED substrate (+), (-) polarity is changed from time to time and emits LED lamp, bulb In the non-polar LED lamp 100 for direct current power (DC) consisting of a non-polar LED lamp (100b) for direct current power (DC) having a lamp structure, The non-polarity LED lamp 100 for DC power supply DC connects the connection between the DC power supply terminal and the LED substrate irrespective of the (+) and (-) polarity and generates a PWM dimming signal to the LED substrate. Non-polar LED lamp for DC power supply (DC) configured with a switch type LED driver module, characterized in that comprises a switch type LED driver module 200 for controlling the current mode flowing. The method of claim 1, wherein the switch type LED driver module 200 A fuse unit 210 which protects a circuit by blocking an overcurrent introduced by being applied to a DC power input terminal DC IN; A first EMI line filter unit 220 which removes noise of a DC power supply DC passing through the fuse unit; A second EMI line filter unit 230 which removes noise of the DC power supply DC, which is transmitted through the DC power input terminal DC IN; A bridge rectifier 240 for rectifying and directing a voltage output from the first EMI line filter unit and the second EMI line filter unit, and supplying a voltage to a switched LED drive IC which is subsequently connected; Linear dimming by receiving the rectified voltage from the bridge rectifying unit, inputting and feedbacking the voltage appearing across the LED driving power switching MOSFET (Q3) from the high voltage current sensing IC, and feeding back the value within the reference set voltage Switch type LED drive IC 250 which generates a PWM dimming signal within a duty ratio of 0 to 100% according to an external control signal (TTL) and outputs it to an N-channel power MOSFET Q1 through a gate terminal. )Wow, Detects the voltage (for example, 12V, 24V, 48V) that appears across the power switching MOSFET (Q3) for driving the LED module, and detects the high voltage current sent to the output current feedback terminal of the switched LED drive IC when a value higher than the reference voltage is detected. IC 260 for DC power supply configured with a switch type LED driver module, characterized in that it is composed of a power supply switching MOSFET (Q3) 270 for driving a plurality of LED modules according to the PWM dimming signal transmitted from the switch type LED drive IC ( Non-polar LED lamp for DC). The method of claim 2, wherein the switch type LED drive IC 250 A high voltage rectified from the bridge rectifier is applied to the Vin terminal, and a capacitor C2 is connected to the reference voltage (REF) terminal to set a reference voltage having an error of less than 2%, and set the output current level. The resistor R13 is connected to divide the voltage applied to the REF terminal to the set IREF terminal, and the output voltage (Vout) terminal of the high voltage current sensing IC is connected to the output current feedback (FDBK) terminal, and the closed loop control (COMP) Capacitor C7 is connected to the terminal, resistor R9 is connected to the input current limit setting (CLIM) terminal, and the input current limit value is set through program setting, and the external control signal (TTL) is applied to the PWMD terminal. It generates PWM dimming signal within 100% range and outputs it to N-channel power MOSFET (Q1), which is a switching element, through the gate terminal, and resistor R3 is connected to the slope correction (SC) terminal. Through voltage When the over-voltage protection (OVP) terminal exceeds 1.25V, the gate output is turned off, the low signal is sent to the FAULT terminal, and the overvoltage protection (OVP) terminal is below 1.25V. When the voltage flows, the gate output is turned on, and the N-channel power MOSFET Q2, which is a switching element, is connected to the output short circuit protection (FAULT) terminal, and is connected across the power switching MOSFET Q3 for driving the LED module. When the output voltage and output overvoltage occur, the drain terminal of the N-channel power MOSFET (Q2) is turned off to disconnect the N-channel power MOSFET (Q2) and the power supply switching MOSFET (Q3) for driving the LED module. It is configured to be connected to the drain terminal of the N-channel power MOSFET (Q1) through a resistor R4 connected to the CS terminal, to set a blanking time of 100ns (min), and to the gate terminal (G-channel) MOSFET (Q1) Connected to the gate terminal of, within the range of + 0.2A / -0.4A It is configured to output a PWM dimming signal, and a resistor R2 is connected to the RT terminal and configured to be set to constant frequency mode or to constant off-time mode programmatically. Non-polar LED lamp for DC power supply (DC) is configured, characterized in that the switch type LED driver module. The high voltage current sensing IC 260 of claim 2, wherein A non-polar LED lamp for a DC power supply (DC) configured with a switch type LED driver module, characterized in that for sensing the voltage across the power switching MOSFET (Q3) for driving the LED module through the sense resistor R5. The method of claim 1, wherein the switch type LED driver module (200) is a non-polar LED lamp for a DC power supply (DC) configured with a switch type LED driver module, characterized in that any one of a rectangular shape and a circular shape is formed.

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