CN103841697B - The IC chip and its control circuit of electric ballast direct drive LED - Google Patents
The IC chip and its control circuit of electric ballast direct drive LED Download PDFInfo
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Abstract
The present invention relates to the IC chip and its control circuit of electric ballast direct drive LED.The present invention can solve the problems, such as the big various illuminating lamp technology power attenuations that existing electric ballast drives at present, short life and air pollution, its drip irrigation device：IC chip includes input pin and output pin; also include rectification circuit, no-load protective circuit and constant-current source circuit; the input of rectification circuit is connected with input pin; the outfan of rectification circuit is connected with the input of constant-current source circuit by no-load protective circuit, and the outfan of the constant-current source circuit is connected with output pin.Control circuit, the constant current size control circuit of the output power controlling circuit, the filter circuit of IC chip rectification and IC chip including electronic ballast output end, output size and constant current output size can freely be adjusted by user by the present invention, suitable LED circuit, is that existing various electric ballasts drive fluorescent lamp and direct replacement of metal halide lamp, sodium vapor lamp to bring convenience.
Description
Technical field
The present invention is a kind of IC chip and its control circuit, more particularly to a kind of electric ballast direct drive LED's
IC chip and its control circuit.
Background technology
LED has the advantages that small power consumption, long service life, the field such as has been widely used in illuminating, has shown, such as LED shines
Bright lamp, LED display, LED decorations etc..With pay attention to day by day of the country to green light source, the market of LED product and using front
Scape is boundless.As LED is to use direct voltage drive, it is impossible to directly using line voltage, it is necessary to be converted into line voltage
The LED drive power of DC voltage.Current LED drive power is substantially with the constant-current driving power supply of Switching Power Supply form, but
Generally all have the shortcomings that cost is high.And it is well known that existing more than the 20 years development in fluorescent lamp AC electron ballast is gone through
History, technically very ripe already, cost is also quite reasonable, and under the conditions of Same Efficieney, the cost of electric ballast only has
/ 3rd of LED driving switch power supply costs, so driving LED that there are a lot of advantages using electric ballast.
China Patent Publication No.：102647838A, publication date August in 2012 22 days disclose a kind of electric ballast and drive
The modular converter of dynamic LED, the modular converter are connected between electric ballast and LED array, it is characterised in that described conversion
Module is included for adjusting the high frequency current-limiting circuit of electronic ballast output end high-frequency and high-voltage alternating current, for rectifying and wave-filtering change
Current rectifying and wave filtering circuit into steady direct current, for adjusting the initial mu balanced circuit that adapts to LED driving voltages and for adjusting LED institutes
The constant-current drive circuit of current control, described high frequency current-limiting circuit, current rectifying and wave filtering circuit, initial mu balanced circuit and constant current need to be used
Drive circuit is connected.This technical scheme drives LED using electric ballast, but there is more work(in this technical scheme
Rate is lost, resistive element particularly therein, inductance and audion, has more power be consumed in wherein, and heating is also compared
It is more, also there is considerable influence to the service life of component.
The content of the invention
The purpose of the present invention be for solve the various illuminating lamp technologies that at present existing electric ballast drives exist it is more
Power attenuation, resistive element particularly therein have more power be consumed in wherein, and many, short life is also compared in heating
With the problem of air pollution, there is provided a kind of to consume less, generate heat less, element is simple, be easily integrated, the electronics of long service life
The IC chip and its control circuit of ballast direct drive LED.
The technical solution adopted for the present invention to solve the technical problems is：A kind of electric ballast directly drives the IC of LED
Chip, including input pin and output pin, also including rectification circuit, no-load protective circuit and constant-current source circuit, rectification circuit
Input be connected with input pin, the input of the outfan of rectification circuit by no-load protective circuit with constant-current source circuit connects
Connect, the outfan of the constant-current source circuit is connected with output pin.It is of the invention so to arrange, by by the output of electric ballast
Electric current carries out rectification and constant current output, stable continuous current can be exported to LED circuit, drive LED circuit illumination, this
It is bright to consume less, generate heat less, element is simple, be easily integrated, and bidirectional thyristor Q1 is operated in half conducting state, plays unloaded guarantor
The effect of shield, has longer service life, and the present invention can pass through IC chip and peripheral circuit, freely adjust output by user
Watt level and constant current output size, can be adapted to various LED circuits, be that existing various electric ballasts drive different shape
Fluorescent lamp, such as：Straight lamp tube, annular lamp tube, H-shaped fluorescent tube, and metal halide lamp, high and low pressure sodium vapor lamp directly replace and bring
Facilitate condition.
Preferably, the IC chip of described electric ballast direct drive LED also includes protection circuit, protection circuit
Input is connected with input pin, and the outfan of the protection circuit is connected with the input of rectification circuit.Protection circuit is by electricity
The high-frequency high-voltage circuit of the output of sub-ballast is protected, it is therefore prevented that high frequency electric distortion suddenly is to part electronics in IC chip
Element is damaged.
Preferably, the IC chip of described electric ballast direct drive LED is eight pin package chips, rectification circuit
Including diode D1, diode D2, diode D3 and diode D4, no-load protective circuit includes diode D5, bidirectional thyristor
The anode of Q1 and resistance R3, diode D1 is connected with the negative electrode of diode D3, the anode of diode D3 and the anode of diode D4
Connection, the negative electrode of diode D4 are connected with the anode of diode D2, and the negative electrode of diode D2 is connected with the negative electrode of diode D1, and two
The anode of pole pipe D5 is connected with the negative electrode of the negative electrode and diode D1 of diode D2, the first anode of bidirectional thyristor Q1 and two
The negative electrode connection of the negative electrode and diode D1 of pole pipe D2, the second plate of bidirectional thyristor Q1 and the anode of diode D3 and
The anode connection of diode D4, the control pole of bidirectional thyristor Q1 are connected with the negative electrode of diode D5 by resistance R3, diode
The anode of D1 leads to the first and second pins, and the negative electrode of diode D4 leads to the 3rd pin and the 4th pin, two-way brilliant lock
The second plate of pipe Q1 leads to the 5th pin, and the negative electrode of diode D5 leads to the 8th pin, the negative electrode of diode D5 also with
Constant-current source circuit connects, and constant-current source circuit is connected with the 6th pin and the 7th pin.Diode D1, diode D2, diode
D3 and diode D4 composition rectification circuits, carry out rectification to electric current, and diode D5, resistance R3 and bidirectional thyristor Q1 compositions are unloaded
Protection circuit, when IC chip outfan is unloaded, bidirectional thyristor Q1 is operated in half conducting state, plays the work of no-load protection
With the setting of diode D5 prevents directional current, it is ensured that the sense of current.
Preferably, described constant-current source circuit includes audion Q3, field effect transistor Q2 and resistance R4, the moon of diode D5
Pole is connected with the colelctor electrode of audion Q3 by resistance R4, the emitter stage of audion Q3 and the anode of diode D3 and diode
The anode connection of D4, the base stage of audion Q3 are connected with the substrate of field effect transistor Q2 and source electrode, the grid of field effect transistor Q2 and three
The colelctor electrode connection of pole pipe Q3, the drain electrode of field effect transistor Q2 lead to the 7th pin, and the source electrode of field effect transistor Q2 leads to the 6th
Pin, the emitter stage of audion Q3 are connected with the 5th pin.Used in the present invention, audion Q3 and field effect transistor Q2 constitute perseverance
Stream source, wherein the present invention adopts field effect transistor Q2 rather than adopts audion, because field effect transistor is voltage control device, at this
Replace field effect transistor Q2 to have more loss and higher caloric value according to audion in invention, very fast IC chip can be affected
Service life and drive LED circuit when consumption in operation.
Preferably, described protection circuit includes resistance R1 and resistance R2, one end of resistance R1 is connected with the first pin,
The other end of resistance R1 is connected with second pin, and one end of resistance R2 is connected with the 3rd pin, the other end of resistance R2 and the 4th
Pin connects.The high-frequency high-voltage circuit of the output of electric ballast is protected by protection circuit, it is therefore prevented that the wink of high frequency electric
When distortion part electronic component in IC chip is damaged.And resistance R1, the design of resistance R2 are simple, can reach and set
Meter original intention.
Preferably, described resistance R3 resistance values span is 200K ohms to 330K ohms, described resistance R4
Resistance value scope be 1.5M ohms to 2M ohms.The resistance of resistance R3 and resistance R4 so sets, it can be ensured that for two-way
The gate voltage of IGCT Q1, and the size of the voltage being carried on resistance R4 and resistance R3, it is ensured that Constant current input end
Voltage value.
A kind of electric ballast directly drives the control circuit of LED, for driving LED circuit, including such as 3 to 6 institute of right
The IC chip and the electric ballast of the output of dual input four of any one electric ballast direct drive LED for stating, described electricity
The control circuit of sub-ballast direct drive LED also includes inductance L, resistance RT and electric capacity C, the first outfan of electric ballast
The first pin of IC chip that LED is directly driven with electric ballast is electrically connected, the second outfan and the electronics town of electric ballast
The IC chip second pin electrical connection of stream device direct drive LED, the 3rd outfan of electric ballast are direct with electric ballast
The 4th outfan and the electric ballast of the 3rd pin of the IC chip electrical connection of LED, electric ballast is driven to directly drive LED's
The 4th pin of IC chip is electrically connected, and first end and the electric ballast of resistance RT directly drive the 6th pin of the IC chip electricity of LED
Connection, the 5th pin of IC chip that second end of resistance RT directly drives LED with electric ballast are electrically connected, the anode of electric capacity C
The 8th pin of IC chip that LED is directly driven with electric ballast is electrically connected, and negative electrode and the electric ballast of electric capacity C directly drive
The 5th pin of the IC chip electrical connection of LED, one end and the electric ballast of inductance L directly drive the IC chip second pin of LED
Electrical connection, the other end of inductance L are electrically connected with the 3rd pin of IC chip of electric ballast direct drive LED, and the of LED circuit
One end and electric ballast directly drive the 8th pin of IC chip of LED and electrically connect, the second end of LED circuit and electric ballast
The 7th pin of the IC chip electrical connection of direct drive LED.The input of the output ballast of existing dual input four is input into for exchange, and four
In individual outfan, the first outfan and the 4th outfan are connected with ballast inductor, the second outfan and the 3rd outfan and power
Compensating electric capacity connects, and the IC chip in the present invention plays rectification, no-load protection and constant current effect, peripheral control circuits, including electricity
The constant current of filter circuit and IC chip constant-current source after the output power controlling circuit of sub-ballast outfan, IC chip rectification is big
Three kinds of circuits of little control circuit, inductance L play adjustment output electricity as the output power controlling circuit of electronic ballast output end
Stream frequency, the frequency for changing original electric ballast output current by inductance L, so as to reach adjustment electronic ballast output end
Output effect, resistance RT as IC chip constant-current source constant current size control circuit then play adjustment output constant current it is big
Little effect, electric capacity C are filtered effect as the filter circuit after IC chip rectification, are reached by cooperating for above element
To the effect of stabilized driving LED circuit.
Preferably, described inductance L is variable inductance, described resistance RT is variable resistance.So arrange, user
The electric current for exporting can be adjusted by adjusting inductance L and resistance RT, be adapted to various LED circuits.
The present invention substantial effect be：The present invention consumes less, generates heat less, and element is simple, be easily integrated, two-way crystalline substance
Brake tube Q1 is operated in half conducting state, plays a part of no-load protection, has longer service life, and the present invention can be by user
Freely adjust, various LED circuits can be adapted to.
Description of the drawings
Fig. 1 is the circuit structure block diagram of IC chips in the present invention；
Fig. 2 is the circuit structure block diagram of the present invention.
In figure：1st, protection circuit, 2, rectification circuit, 3, no-load protective circuit, 4, constant-current source circuit, 5, IC chip.
Specific embodiment
Below by specific embodiment, and accompanying drawing is combined, technical scheme is described in further detail.
Embodiment 1：
A kind of electric ballast directly drives the IC chip of LED（Referring to accompanying drawing 1）, it is eight pin package chips, including four
Input pin and four output pins, also including protection circuit 1, rectification circuit 2, no-load protective circuit 3 and constant-current source circuit 4, protect
The input of protection circuit is connected with input pin, and the outfan of the protection circuit is connected with the input of rectification circuit.Rectification
The input of circuit 2 is connected with input pin by protection circuit 1, the outfan of rectification circuit 2 by no-load protective circuit 3 with
The input connection of constant-current source circuit 4, the outfan of the constant-current source circuit 4 are connected with output pin.
Protection circuit 1 includes resistance R1 and resistance R2, and one end of resistance R1 is connected with the first pin, the other end of resistance R1
It is connected with second pin, one end of resistance R2 is connected with the 3rd pin, the other end of resistance R2 is connected with the 4th pin.
Rectification circuit 2 includes diode D1, diode D2, diode D3 and diode D4, and no-load protective circuit includes two
Pole pipe D5, bidirectional thyristor Q1 and resistance R3, the anode of diode D1 are connected with the negative electrode of diode D3, the anode of diode D3
It is connected with the anode of diode D4, the negative electrode of diode D4 is connected with the anode of diode D2, the negative electrode of diode D2 and two poles
The negative electrode connection of pipe D1, the anode of diode D5 are connected with the negative electrode of the negative electrode of diode D2 and diode D1, two-way brilliant lock
The first anode of pipe Q1 is connected with the negative electrode of the negative electrode and diode D1 of diode D2, the second plate of bidirectional thyristor Q1 with
The anode connection of the anode and diode D4 of diode D3, the control pole of bidirectional thyristor Q1 is by resistance R3 and diode D5
Negative electrode connection, the anode of diode D1 leads to the first and second pins, the negative electrode of diode D4 lead to the 3rd pin and
4th pin, the second plate of bidirectional thyristor Q1 lead to the 5th pin, and the negative electrode of diode D5 leads to the 8th pin, and two
The negative electrode of pole pipe D5 is also connected with constant-current source circuit, and constant-current source circuit is connected with the 6th pin and the 7th pin.
Described constant-current source circuit 4 includes audion Q3, field effect transistor Q2 and resistance R4, and the negative electrode of diode D5 is by electricity
Resistance R4 is connected with the colelctor electrode of audion Q3, the anode of the emitter stage of audion Q3 and the anode of diode D3 and diode D4
Connection, the base stage of audion Q3 are connected with the substrate of field effect transistor Q2 and source electrode, and the grid of field effect transistor Q2 is with audion Q3's
Colelctor electrode connects, and the drain electrode of field effect transistor Q2 leads to the 7th pin, and the source electrode of field effect transistor Q2 leads to the 6th pin, three poles
The emitter stage of pipe Q3 is connected with the 5th pin.
Resistance R3 resistance values in the present embodiment are 1.5M ohms for the resistance value of 200K ohmage R4.
Electric ballast disclosed in the present embodiment directly drives the IC chip of LED, can be to high-frequency and high-voltage using this IC chip
Circuit enters line distortion protection, rectification, pressure regulation, adjusting power, reaches constant current output, the present embodiment compact, particularly suitable and collection
Into in LED lamp circuit.The high-frequency high-voltage circuit of the output of electric ballast is protected by the protection circuit of the present embodiment, is prevented
Stop distortion when high frequency electric is exported to damage part electronic component in IC chip.And resistance R1, the design of resistance R2
It is simple, design original intention can be reached.Diode D1, diode D2, diode D3 and diode D4 composition rectification circuit, it is right
Electric current carries out rectification, and used in the present invention, audion Q3 and field effect transistor Q2 constitute constant-current source, and wherein the present embodiment adopts field
Effect pipe Q2 rather than audion is adopted, because field effect transistor is voltage control device, replaced according to audion in the present invention
Field effect transistor Q2 has more loss and higher caloric value, can affect the service life and the LED for driving of very fast IC chip
Consumption in operation during circuit.By the output current of electric ballast is carried out rectification and constant current output, can be by stable perseverance
Stream electric current is exported to LED circuit, drives LED circuit illumination.Diode D5, resistance R3 and bidirectional thyristor Q1 composition no-load protections
Circuit, when IC chip outfan is unloaded, bidirectional thyristor Q1 is operated in half conducting state, plays a part of no-load protection, and two
The setting of pole pipe D5 prevents directional current, it is ensured that the sense of current.
A kind of electric ballast directly drives the control circuit of LED（Referring to accompanying drawing 2）, for driving LED circuit, including reality
The electric ballast that the IC chip 5 and dual input four for applying a kind of electric ballast direct drive LED described in example 1 is exported, it is described
The control circuit of electric ballast direct drive LED also include inductance L, resistance RT and electric capacity C, the first of electric ballast be defeated
Go out 5 first pin of IC chip that end directly drives LED with electric ballast to electrically connect, i.e., by the resistance R1 in IC chip 5 and
The anode connection of diode D1；Second outfan of electric ballast directly drives the IC chip 5 second of LED with electric ballast
Pin is electrically connected, i.e., be directly connected with the anode of the diode D1 in IC chip 5；3rd outfan of electric ballast and electronics
Ballast direct drive LED the 3rd pin of IC chip 5 electrical connection, i.e., directly with IC chip 5 in diode D4 negative electrode connect
Connect；The 4th pin of IC chip 5 that 4th outfan of electric ballast directly drives LED with electric ballast is electrically connected, that is, lead to
The resistance R2 crossed in IC chip 5 is connected with the negative electrode of diode D4；The first end of resistance RT directly drives LED with electric ballast
The 6th pin of IC chip 5 electrical connection, i.e., be connected with the base stage of audion Q3 in IC chip 5；Second end of resistance RT and electronics
The 5th pin of IC chip 5 electrical connection of ballast direct drive LED, i.e., be connected with the emitter stage of audion Q3 in IC chip 5；Electricity
The 8th pin of IC chip 5 that the anode for holding C directly drives LED with electric ballast is electrically connected, i.e., with diode D5 in IC chip 5
Negative electrode connection；The 5th pin of IC chip 5 that the negative electrode of electric capacity C directly drives LED with electric ballast is electrically connected, i.e., with IC cores
The emitter stage connection of audion Q3 in piece 5；One end of inductance L directly drives 5 second pin of IC chip of LED with electric ballast
Electrical connection, i.e., be connected with the anode of diode D1 in IC chip 5；The other end of inductance L directly drives LED's with electric ballast
The 3rd pin of IC chip 5 is electrically connected, i.e., be connected with the anode of diode D2 in IC chip 5；The first end of LED circuit and electronics town
The 8th pin of IC chip 5 electrical connection of stream device direct drive LED, i.e., be connected with the negative electrode of diode D5 in IC chip 5；LED is electric
Second end on road and electric ballast directly drive the 7th pin of IC chip of LED and electrically connect, i.e., with IC chip 5 in field effect
The drain electrode connection of pipe Q2.
The input of the output ballast of existing dual input four is exchange input, the first outfan and the 4th in four outfans
Outfan is connected with ballast inductor, the second outfan and the 3rd outfan and power back-off capacitance connection, in the present embodiment
IC chip plays rectification, no-load protection and constant current effect, peripheral control circuits, including the output of electronic ballast output end
Three kinds of circuits of constant current size control circuit of filter circuit and IC chip constant-current source after control circuit, IC chip rectification, inductance L
Play adjustment output current frequency, change original by inductance L as the output power controlling circuit of electronic ballast output end
Electric ballast exports the frequency of output current, so as to reach the effect of the output of adjustment electronic ballast output end, electricity
Resistance RT then plays a part of to adjust output constant current size, electric capacity C conducts as the constant current size control circuit of IC chip constant-current source
Filter circuit after IC chip rectification is filtered effect, reaches stabilized driving LED circuit by cooperating for above element
Effect.
Embodiment 2：
The present embodiment is substantially the same manner as Example 1, and difference is that the resistance R3 resistance values in the present embodiment are 330K
Ohm, the resistance value of described resistance R4 is 2M ohms.Inductance L in the present embodiment is variable inductance, and described resistance RT is
Variable resistance.
In the present embodiment, user can be adjusted to the electric current for exporting by adjusting inductance L and resistance RT, Ke Yishi
Close the driving current that a variety of LED circuit outputs match.
The present embodiment can solve that the various illuminating lamp technology power attenuations that at present existing electric ballast drives are big, the life-span
The problem of short and air pollution etc., the present embodiment consume less, generate heat less, and element is simple, be easily integrated, bidirectional thyristor Q1
Be operated in half conducting state, play a part of no-load protection, have longer service life, the present embodiment can pass through IC chip and
Peripheral circuit, freely adjusts output size and constant current output size by user, can be adapted to various LED circuits, is existing
The various electric ballasts having drive fluorescent lamp of different shapes, such as：Straight lamp tube, annular lamp tube, H-shaped fluorescent tube, and metal halogen
Compound lamp, high and low pressure sodium vapor lamp are directly replaced and bring convenience condition.
Embodiment described above is one kind preferably scheme of the present invention, not the present invention is made any pro forma
Limit, also have other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (5)
1. a kind of electric ballast directly drives the IC chip of LED, including input pin and output pin, it is characterised in that：Also
Including rectification circuit, no-load protective circuit and constant-current source circuit, the input of rectification circuit is connected with input pin, rectification circuit
Outfan be connected with the input of constant-current source circuit by no-load protective circuit, the outfan of the constant-current source circuit and output
Pin connects；The IC chip of described electric ballast direct drive LED also includes protection circuit, the input of protection circuit with
Input pin connects, and the outfan of the protection circuit is connected with the input of rectification circuit；Described electric ballast is direct
The IC chip for driving LED is eight pin package chips, and rectification circuit includes diode D1, diode D2, diode D3 and two poles
Pipe D4, no-load protective circuit include diode D5, bidirectional thyristor Q1 and resistance R3, and the anode of diode D1 is with diode D3's
Negative electrode connects, and the anode of diode D3 is connected with the anode of diode D4, and the negative electrode of diode D4 is connected with the anode of diode D2
Connect, the negative electrode of diode D2 is connected with the negative electrode of diode D1, the anode of diode D5 and the negative electrode of diode D2 and two poles
The negative electrode connection of pipe D1, the first anode of bidirectional thyristor Q1 are connected with the negative electrode of the negative electrode of diode D2 and diode D1,
The second plate of bidirectional thyristor Q1 is connected with the anode of the anode and diode D4 of diode D3, the control of bidirectional thyristor Q1
Pole processed is connected with the negative electrode of diode D5 by resistance R3, and the anode of diode D1 leads to the first and second pins, diode
The negative electrode of D4 leads to the 3rd pin and the 4th pin, and the second plate of bidirectional thyristor Q1 leads to the 5th pin, diode
The negative electrode of D5 leads to the 8th pin, and the negative electrode of diode D5 is also connected with constant-current source circuit, constant-current source circuit and the 6th pin
And the 7th pin connection；Described constant-current source circuit includes audion Q3, field effect transistor Q2 and resistance R4, the moon of diode D5
Pole is connected with the colelctor electrode of audion Q3 by resistance R4, the emitter stage of audion Q3 and the anode of diode D3 and diode
The anode connection of D4, the base stage of audion Q3 are connected with the substrate of field effect transistor Q2 and source electrode, the grid of field effect transistor Q2 and three
The colelctor electrode connection of pole pipe Q3, the drain electrode of field effect transistor Q2 lead to the 7th pin, and the source electrode of field effect transistor Q2 leads to the 6th
Pin, the emitter stage of audion Q3 are connected with the 5th pin.
2. electric ballast according to claim 1 directly drives the IC chip of LED, it is characterised in that：Described protection
Circuit includes resistance R1 and resistance R2, and one end of resistance R1 is connected with the first pin, and the other end and the second pin of resistance R1 connect
Connect, one end of resistance R2 is connected with the 3rd pin, the other end of resistance R2 is connected with the 4th pin.
3. electric ballast according to claim 1 and 2 directly drives the IC chip of LED, it is characterised in that：Described electricity
Resistance R3 resistance values span is 200K ohms to 330K ohms, and the resistance value scope of described resistance R4 is 1.5M ohms to 2M
Ohm.
4. a kind of electric ballast directly drives the control circuit of LED, for driving LED circuit, including such as claim 1 to 2
The IC chip and the electric ballast of the output of dual input four of described any one electric ballast direct drive LED, its feature
It is：The control circuit of described electric ballast direct drive LED also includes inductance L, resistance RT and electric capacity C, electronic ballast
The first pin of IC chip that first outfan of device directly drives LED with electric ballast is electrically connected, and the second of electric ballast
Outfan and electric ballast directly drive the IC chip second pin of LED and electrically connects, the 3rd outfan of electric ballast and
The 3rd pin of the IC chip electrical connection of electric ballast direct drive LED, the 4th outfan of electric ballast and electronic ballast
The 4th pin of the IC chip electrical connection of device direct drive LED, first end and the electric ballast of resistance RT directly drive the IC of LED
The 6th pin of chip is electrically connected, and the 5th pin of IC chip that second end of resistance RT directly drives LED with electric ballast is electrically connected
Connect, the 8th pin of IC chip that the anode of electric capacity C directly drives LED with electric ballast is electrically connected, the negative electrode and electronics of electric capacity C
The 5th pin of the IC chip electrical connection of ballast direct drive LED, one end and the electric ballast of inductance L directly drive LED's
IC chip second pin is electrically connected, and the 3rd pin of IC chip that the other end of inductance L directly drives LED with electric ballast is electrically connected
Connect, the 8th pin of IC chip that the first end of LED circuit directly drives LED with electric ballast is electrically connected, the second of LED circuit
The 7th pin of IC chip for directly driving LED with electric ballast is held to electrically connect.
5. electric ballast according to claim 4 directly drives the control circuit of LED, it is characterised in that：Described electricity
Sense L is variable inductance, and described resistance RT is variable resistance.
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| CN104540304B (en) * | 2015-01-16 | 2017-01-18 | 邓树兴 | Electronic replacement-type double-end straight-tube LED fluorescent lamp and safety protection circuit thereof |
| WO2016112538A1 (en) * | 2015-01-16 | 2016-07-21 | 邓树兴 | Electronic substitution-type double-end straight-tube led lamp and safety protection circuit thereof |
| CN105025627B (en) * | 2015-07-27 | 2018-02-23 | 苏州智浦芯联电子科技股份有限公司 | Rectifier bridge device closes the LED drive circuit encapsulating structure and illuminator of envelope |
| CN106793338A (en) * | 2017-01-25 | 2017-05-31 | 浙江东元照明有限公司 | The LED drive circuit of compatible various ballasts |
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| CN101989742A (en) * | 2009-08-04 | 2011-03-23 | 汤征宁 | No-load protection circuit for capacitor step-down |
| JP2011243331A (en) * | 2010-05-14 | 2011-12-01 | Fkk Co Ltd | Led power supply circuit |
| CN102647838A (en) * | 2012-04-26 | 2012-08-22 | 永康市普发科技有限公司 | Conversion module of electronic ballast-driven LED (light emitting diode) |
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Effective date of registration: 20200706 Address after: 311400 2nd floor, building 2, No. 10, Chunjian Township, Chunjian Township, Fuyang District, Hangzhou City, Zhejiang Province Patentee after: ZHEJIANG FUCHUN LIGHTING Co.,Ltd. Address before: 311400 No. 7 labour Road, Hangzhou, Zhejiang, Fuyang Patentee before: Luo Zhenghua |
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