KR200279408Y1 - Fluorescent lamp starter - Google Patents

Abstract

The present invention relates to a fluorescent lamp starter that performs a fast charging of a capacitor to decrease the current level when the switch in the ASD is turned off to reduce the energy accumulated in the ballast, while eliminating the spike voltage during lamp lighting and protection functions.

To this end, the present invention provides a driver unit in which optimal conditions for lighting and grasping a lighting state of a fluorescent lamp are programmed; A power supply and switch section including a power supply for driving the power switch and the driver; A spike voltage controller for removing a spike voltage generated when a lamp is turned on and a protection circuit is operated; And a driver malfunction prevention part for preventing a malfunction of the driver by the leakage current of the power supply and the switch part.

Description

Fluorescent Starter {FLUORESCENT LAMP STARTER}

The present invention relates to a fluorescent lamp starter, which performs a fast charging of the capacitor to reduce the current level when the switch in the ASD is turned off, thereby reducing the energy stored in the ballast, thereby eliminating the spike voltage during lamp lighting and protection functions. In case of re-emergence operation after failure of fluorescent lamp, the fluorescent lamp starter is prevented from malfunctioning more than 8 times or less than 8 times when the lamp lighting attempt is not performed exactly 8 times due to leakage current inside ASD. It is about.

Referring to FIG. 1, a conventional fluorescent starter of "ST Electronics" is described. When a voltage is applied to both ends of the fluorescent starter, the driver unit 20 supplies the power supply and the switch unit 10 including a bidirectional power switch. ON, and preheating current is applied to the filament through pins 3 and 4 of the power supply and switch (hereinafter referred to as 'ASD') (Q1).

The warm-up time is programmed to 1.25sec at 60Hz and 1.5sec at 50Hz in the driver IC1. The warm-up time is determined by the driver IC1 according to the EFS2A-CD and EFS2B-CD types, and also the pin 2 of the driver ( The PREHEAT SELECT can be changed depending on which of the 12 pins (Vcc) and 2/3/5/6/7/8/10/11 (GND) are connected.

The driver IC1 continuously reads the information on the current while the preheat current is flowing. When the current reaches the switch-off level, the driver IC1 turns off the Application Specific Discretes (Q1) to apply a high pulse voltage to the lamp. After the pulse voltage is applied, determine the lighting state of the lamp.

If it does not turn on, the driver IC1 turns on the ASD Q1 again to try again. The preheating time at this time is programmed to 0.75 sec (50 Hz / 60 Hz).

The re-lighting attempt is carried out up to seven times after the initial lighting attempt. If the lighting is not turned on even after that, the protection function programmed in the driver IC1 is operated to stop the operation without further lighting attempt.

If the lamp is turned on, the driver IC1 continuously checks the lamp status and maintains the initial stand-by mode in case that the lamp is turned on due to various circumstances.

On the other hand, when the power supply voltage is lower than the rated voltage or abnormal operation of the capacitor (C1), as shown in Figures 2 and 3, the fluorescent lamp is turned on or does not turn on the protection function is activated and the starter does not operate There was a problem in that a spike voltage was generated at each positive half cycle at the time, so that the starter and the power were not cut off.

The reason for this is that when the lamp is turned on or the protection function is activated, the driver IC1 continuously checks the voltage Vcc of the first capacitor C1 and reads whether the lamp is lit. This is because the internal power switch is turned on / off.

However, in this operation, since the power supply voltage is supplied to the AC sine wave regardless of the operation of the lamp, the voltage passes through the 0V potential when the voltage is switched from (-) to (+) during each period. When the check voltage is instantaneously discharged by the operation of the first capacitor C1, the voltage is lower than the reference voltage, the power switch inside the ASD device is turned on, and when the check voltage is higher than the reference voltage because the power supply voltage is sufficiently high, the inside of the ASD device is The power switch is turned off.

In addition, as the power supply voltage is lower than the rated voltage or the operation of the first capacitor (C1) it can be long operation period. When such a section has enough energy in the ballast, a pulse voltage is generated in each period.

In addition, when the first capacitor C1 voltage Vcc is lower than 7.57 V during each positive half cycle, the driver IC1 turns on the switch inside the ASD device, which causes the first capacitor C1 to drive the driver. It is charged more than 320mA to provide the current which is possible. During this period, a small amount of current is supplied to the lamp filament by ASD.

Therefore, when the first capacitor C1 voltage reaches 7.68 V, the driver IC1 turns off the switch in the ASD, where current is applied to the ballast to induce the spike voltage of the lamp.

Meanwhile, referring to FIG. 4, a starter including a spike voltage controller in the conventional starter circuit of FIG. 1 is a malfunction of the driver due to a leakage current inside the ASD when the re-start operation is performed after a failure of a single lamp. Is generated.

If the malfunction is normal, the lamp lighting attempt is performed exactly eight times, but if the malfunction is more than eight times or less than eight times.

The reason for this is that when the AC power source changes from (+) cycle to (-) cycle, it detects zero cross and operates the internal counter based on the detected reference.

That is, a zero cross is detected by comparing the cathode voltage of the diode connected between pin 7 (GND) and pin 14 in the comparator in the driver. At this time, if sufficient current does not flow through the diode in the driver, the counter may malfunction due to the comparator (see FIGS. 5 and 6).

The reason why the current does not flow through the diode is that the current flows from the current flowing through pin 14, the first resistor R1 and the fifth resistor R5 according to the characteristic of the leakage current in the ASD. This is because the diode in the driver is not sufficiently saturated as more flows from the first capacitor C1 and the second resistor A1 to the fifth resistor R5 and the first resistor R1.

The present invention has been made to solve the above problems, the present invention is to provide a fluorescent lamp starter to quickly charge the capacitor, to remove the spike voltage by reducing the energy accumulated in the ballast when the switch in the ASD is turned off have.

Fluorescent lamp starter according to an aspect of the present invention for achieving the above object, the driver unit is programmed the optimum conditions necessary for grasping and lighting the fluorescent lamp; A power supply and switch section including a power supply for driving the power switch and the driver; A spike voltage controller for removing a spike voltage generated when a lamp is turned on and a protection circuit is operated; And a driver malfunction preventing portion for preventing a malfunction of the driver by the leakage current of the power supply and the switch portion.

Preferably, the driver malfunction prevention unit is characterized in that the first zener diode and the second Schottky diode is connected in parallel.

1 is a circuit diagram for explaining a conventional fluorescent lamp starter,

2 is a graph illustrating a voltage waveform when a lamp is turned on when there is no spike voltage controller;

3 is a graph illustrating a voltage waveform during a protection function when there is no spike voltage controller;

4 is a circuit diagram illustrating a starter including a spike voltage controller in a conventional circuit;

5 is a graph showing a voltage waveform of a protective function when it is normal;

6 is a graph showing voltage waveforms of a protective function in the case of a malfunction.

7 is a circuit diagram for explaining a fluorescent lamp starter according to the present invention,

8 is a graph comparing charging characteristics of a first capacitor with and without a spike voltage controller;

9 is a graph showing a voltage waveform when a lamp is turned on when there is a spike voltage controller;

FIG. 10 is a graph illustrating voltage waveforms during a protection function when there is a spike voltage controller. FIG.

<Explanation of symbols for the main parts of the drawings>

10: power supply and switch section 20: driver section

30: spike voltage control unit 40: driver malfunction control unit

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

In the present invention, the capacitor charge is accelerated to reduce the energy stored in the ballast when the switch in the ASD is turned off, thereby eliminating the spike voltage, and leaking the inside of the ASD when a re-ignition operation is performed after the failure of the fluorescent lamp. Although a fluorescent lamp starter which prevents a malfunction in which an incorrect number of re-lights occur due to a current will be described as a preferred embodiment, the technical idea of the present invention is not limited thereto and may be variously modified and implemented by those skilled in the art. Of course.

The fluorescent starter according to the present invention will be described in detail with reference to FIGS. 7 to 10.

7 is a circuit diagram illustrating a fluorescent lamp starter according to the present invention, FIG. 8 is a graph comparing charging characteristics of a first capacitor with and without a spike voltage controller, and FIG. 9 with a spike voltage controller. 10 is a graph illustrating voltage waveforms when a lamp is turned on. FIG. 10 is a graph illustrating voltage waveforms when a protection function is operated when a spike voltage controller is provided.

The fluorescent lamp starter according to the present invention is a power supply and switch unit including a driver unit 20 is programmed to determine the lighting conditions of the fluorescent lamp and the optimum conditions required for lighting, and a power switch and a power supply for driving the driver ( 10), the spike voltage control unit 30 for removing the spike voltage generated when the lamp is turned on and the protection circuit operation, and the driver malfunction prevention unit 40 for preventing a driver malfunction by the leakage current of the power supply and the switch unit. It consists of.

Now, the fluorescent lamp starter according to the present invention will be described in more detail with reference to FIG. 7. The fluorescent lamp starter includes a power supply and switch unit 10, a driver unit 20, a spike voltage controller 30, and a driver malfunction prevention. A portion 40 is included.

The driver unit 20 has two diodes (hereinafter, referred to as "ESD diodes") connected between pins 12 and 14 of the driver for protection against ESD, and current flows through two ESD diodes. It will flow into the ASD through the.

At this time, when the first zener diode ZD1 is not connected, the forward voltage of the two ESD diodes inside the driver IC1 is higher than the forward voltage inside the ASD Q1, so that the power supply is supplied through the driver unit 20. There is no risk of eddy current flowing into the supply and switch section 10.

However, since the forward voltages of the driver IC1 and the ASD Q1 are not significantly different by connecting the first zener diode ZD1 to prevent the leakage current, there is an increased risk of eddy current flow. By using Equation 1 below, the risk of eddy currents can be reduced.

VF _D2 <0.673 + 0.012ln (If)

Since the power supply and switch unit 10 and the driver unit 20 are the same as the power supply and switch unit 10 and the driver unit 20 described above, detailed description thereof will be omitted.

The power supply and switch unit 10 includes an ASD Q1 and a first capacitor C1 connected between pins 2 and 4 of the ASD Q1, and the spike voltage controller 30 is an ASD. The fourth resistor R4, the sixth resistor R6, and the first diode D1 are sequentially connected between the pins 3 and 2 of the Q1, and the anode terminal of the first diode D1 is ASD ( It is connected to pin 2 of Q1).

The driver malfunction prevention unit 40 connects the second Schottky diode D2 to the first zener diode ZD1 in parallel to reduce the forward voltage, thereby satisfying Equation 1 and enabling normal operation of the starter. do.

The spike voltage controller 30 reduces the energy accumulated in the ballast when the switch in the ASD Q1 is turned off. That is, by connecting the fourth resistor R4, the sixth resistor R6, and the first diode D1 to the positive of the first capacitor C1, the charge of the first capacitor C1 is increased with more current. Perform.

In addition, the spike voltage controller 30 charges the first capacitor C1 as shown in FIG. 8 by continuing charging with a small current for the remainder of the positive half cycle.

On the other hand, the spike voltage control unit 30 is the current level is reduced when the ASD (Q1) off to reduce the energy stored in the ballast by the following equation (2) lamp as shown in Figure 9 and FIG. Eliminates spike voltage during lighting and protection functions.

E = Lloff ^2/2

The driver malfunction prevention unit 40 connects an anode of the first Zener diode ZD1 and the second Schottky diode D2 to pin 14 of the driver, and connects the cathode to pin 1 of the ASD to perform a malfunction. You can prevent it.

In more detail, the driver malfunction prevention unit 40 connects the anode of the first zener diode ZD1 to pin 14 of the driver IC1, and the cathode is connected to pin 1 of the ASD Q1. Accordingly, leakage current flowing to the fifth resistor R5 and the first resistor R1 through pins 1 through 1 of the first capacitor C1 and ASD Q1 can be suppressed.

In addition, when power is applied to the starter, current is applied to the first resistor R1 and the fifth resistor R5 coupled with pin 1 of the ASD Q1 and pin 14 of the driver IC1 during normal operation of the starter. Limited by

By doing so, the fourth resistor (R4), the sixth resistor (R6), and the first diode (D1) are connected to the positive (+) of the first capacitor (C1) through the fluorescent lamp starter according to the present invention, thereby providing more current. Fast charging of one capacitor (C1), continuous charging with a small current for the remainder of the positive half cycle, and fast charging of the first capacitor reduces the current level when the ASD is off and accumulates in the ballast. This reduces energy consumption while eliminating spike voltages during lamp ignition and protection.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention defined in the appended claims.

As described above, the present invention reduces the energy accumulated in the ballast by reducing the current level when the ASD is turned off due to the rapid charging of the first capacitor in the fluorescent lamp starter, thereby operating the lamp lighting and protection function through the fluorescent lamp starter. The effect is that the spike voltage can be removed.

In addition, when a re-call operation is performed after a failure of a fluorescent lamp, the leakage current inside the ASD is reduced, thereby preventing malfunction of the comparator and the counter in the driver so that the lamp lighting attempt is exceeded 8 times instead of exactly 8 times. Otherwise, there is an effect of preventing malfunctions performed less than eight times.

Claims (3)

In fluorescent starters, A driver unit 20 in which optimal conditions necessary for identifying and lighting a fluorescent lamp are programmed; A power supply and switch unit 10 including a power supply unit for driving the power switch and the driver; A spike voltage controller 30 for removing a spike voltage generated when a lamp is turned on and a protection circuit is operated; And And a driver malfunction preventing portion (40) for preventing a malfunction of the driver by leakage current of the power supply and the switch portion. The method of claim 1, wherein the driver malfunction prevention unit, And a first zener diode and a second Schottky diode connected in parallel. The method of claim 1, The power supply and switch section comprises an ASD (Q1) and a first capacitor (C1) connected between pins 2 and 4 of the ASD (Q1); The spike voltage control unit sequentially connects a fourth resistor R4, a sixth resistor R6, and a first diode D1 between pins 3 and 2 of the ASD Q1, but the first diode D1. A fluorescent starter, characterized in that the anode end of the) is configured to be connected to the pin 2 of the Q1.