CN102355787B - Method and circuit for variable frequency dimming based on UBA2211 - Google Patents
Method and circuit for variable frequency dimming based on UBA2211 Download PDFInfo
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- CN102355787B CN102355787B CN2011102254719A CN201110225471A CN102355787B CN 102355787 B CN102355787 B CN 102355787B CN 2011102254719 A CN2011102254719 A CN 2011102254719A CN 201110225471 A CN201110225471 A CN 201110225471A CN 102355787 B CN102355787 B CN 102355787B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a method and a circuit for variable frequency dimming based on UBA2211. The variable frequency dimming circuit based on UBA2211 comprises an alternating current-direct current (AC-DC) conversion module, a control integrated circuit module, a frequency control dimming module and a ballast, startup, tube and filament heat preservation module. In the method for the variable frequency dimming based on UBA2211, the output frequency of the variable frequency dimming circuit is regulated by regulating the time constant of a resistor-capacitor (RC) circuit so that the power ofa gas discharge lamp in the variable frequency dimming circuit can be regulated. By the method, the variable frequency dimming is realized by controlling the switching frequency of an electronic ballast; the service reliability is high, and project implementation is convenient; and the shortcomings of high device impact stress and high electro-magnetic interference (EMI) are overcome, and requirements for performance of circuit components are reduced.
Description
Technical field
The invention belongs to the electrical and electronic technology field, relate to a kind of frequency conversion light-dimming method and circuit based on UBA2211.
Background technology
The electric ballast light modulation of gaseous discharge lamps such as fluorescent lamp, electricity-saving lamp, CFL has 3 kinds of schemes: the direct current supply voltage that 1. reduces the electric ballast inverter circuit; 2. change electric ballast inverter circuit output pulse width; 3. control the switching frequency of electric ballast inverter circuit.
The operation principle simple, intuitive of first kind of scheme, but can't directly use the ripe also thyristor incandescent lamp light adjusting circuit of popularization and application; The pulse-width modulation method of second kind of scheme exists and changes pulse duration on a large scale, causes that electric current is discontinuous, inverter output transistor stress is big, EMI is big, and the defective that strengthens of the voltage drop of fluorescent tube.
The electronic ballast control integrated circuit UBA2211 of the driving fluorescent lamp of NXP company fresh product, CFL, be a integrate can not light modulation CFL electronic ballast driver and the novel I C of upper and lower half-bridge driven MOSFET.Adopt the designed CFL electric ballast of this IC to have characteristics such as peripheral circuit is simple, low cost, high efficiency, can be good at realizing that filament pre-heating, fluorescent tube start and stable operation.This IC interior contains two power MOSFET tubes, and it is simple to have a peripheral circuit, the advantage that used components and parts are few, and the half-bridge power output circuit back of formation directly meets ballast inductance device L
Lamp, fluorescent lamp Lamp and lamp resonant capacitor C
LampResonance-start-up circuit of forming has directly formed " ballast, startup and fluorescent tube module ".
The compact fluorescent lamp CFL typical circuit that the UBA2211 integrated circuit is formed as shown in Figure 1, this figure is from the UBA2211 databook (Datasheet) of NXP company.It can be divided into 4 work or functional module: the AC-DC modular converter, suppress resistance R by surge
FUSE, 4 rectifier diodes---bridge rectifier, power supply filter capacitor C that the first rectifier diode D1～the 4th rectifier diode D4 forms
BUF, filter inductor L
FILTAnd first filtering-output capacitor C
OUT1With second filtering-output capacitor C
OUT2Form; The control integrated circuit modules detects the preheat curent resistance R by UBA2211 integrated circuit, its outer being with
SENSE, some peripheral capacitors---SW filtering capacitor C
SW, FS capacitor C
FS, DVDT capacitor C
DVDT, VDD filtering capacitor C
VDDForm; Ballast, startup and fluorescent tube module are by ballast inductance device L
Lamp, fluorescent lamp Lamp(contains the filament of both sides) and lamp resonant capacitor C
LampThe resonance of forming-start-up circuit forms; Frequency control module is by oscillation resistance R
OSC, oscillating capacitor C
OSCDetermine normal working frequency.Normal working frequency f
NomComputing formula is:
f
nom=1/(k
OSC×C
OSC×R
OSC) （1）
Oscillation constant k wherein
OSC=1.100 ± 0.035
Start frequency f
StartComputing formula:
f
start=2.5×f
nom （2）
Fig. 1 circuit diagram is at the UBA2211 integrated circuit packing forms of 14 pin, 5 signal ground SGND pins (Pin 1, and Pin 2, and Pin 9, and Pin 10, and Pin 13) parallel connection wherein.Fig. 2 is the UBA2211 ic pin definition of 14 pin, Fig. 3 is the UBA2211 ic pin definition of 8 pin encapsulation, it has only 1 signal ground SGND pin, removed pair of pins PGND(Pin 4 relevant with DVDT among the UBA2211 of 14 pin packing forms) and DVDT(Pin 5), 8 pin packing forms formed.
Summary of the invention
The present invention is directed to existing UBA2211 integrated circuit (IC) design become can not light modulation deficiency, adopt external component to control the vibration output frequency f of this integrated circuit
NomRegulate ballast inductance device L
LampImpedance Z
LlampControl the operating current of fluorescent lamp, reach the method for light modulation purpose.
The present invention specifically is according to normal working frequency f
NomThe f of calculating formula (1)
NomBy oscillation resistance R
OSC, oscillating capacitor C
OSCProduct determine, adopt FREQUENCY CONTROL light-adjusting module Dim to replace fixing frequency control module, namely adopt variable respectively oscillation resistance R
OSC, oscillating capacitor C
OSCComponent frequency control light-adjusting module Dim, the frequency control module in the non-adjustable optical circuit of the traditional design that replacement UBA2211 data book of the integrated circuit provides reaches the switch output frequency of controlling the UBA2211 integrated circuit, regulates ballast inductance device L
LampImpedance Z
LlampWith the purpose of the output current of ballast, realize fluorescent lamp frequency conversion light modulation.
FREQUENCY CONTROL light-adjusting module Dim of the present invention can be respectively by variable oscillation resistance R
OSC+ variable oscillating capacitor C
OSCForm, perhaps respectively by variable oscillation resistance R
OSC+ fixing oscillating capacitor C
OSCForm, perhaps respectively by fixing oscillation resistance R
OSC+ variable oscillating capacitor C
OSCForm, but realize RC product people circuit module for a change.
Realization circuit of the present invention is made up of following 4 modules: the AC-DC modular converter, and identical with traditional AC-DC modular converter; The control integrated circuit modules, identical with traditional control integrated circuit modules; FREQUENCY CONTROL light-adjusting module Dim is respectively by variable oscillation resistance R
OSCWith variable oscillating capacitor C
OSCForm the RC circuit; Ballast, startup, fluorescent tube and filament heat preservation module have the first heating inductor L
Lamp1The first heating capacitor C with series connection with it
Lamp1The first heating LC assembly, the second heating inductor L
Lamp2The second heating capacitor C with series connection with it
Lamp2The second heating LC assembly, lamp resonant capacitor C
Lamp, all kinds of gaseous discharge lamps are as commonly used fluorescent lamp Lamp and ballast inductance device L
Lamp
The present invention is relative, and prior art has the following advantages: the CFL electric ballast that utilizes the UBA2211 integrated circuit to form has characteristics such as low cost, high efficiency, can be good at realizing filament warm start, igniting and stable operation, RMS control can realize the permanent power of lamp, has broken away from the dependence to the input power supply.Designed circuit is simple, and peripheral required device is few, and stability is high; The present invention realizes the frequency conversion light modulation by the switching frequency of control circuit of electronic ballast; The functional reliability height, engineering construction is convenient simultaneously, does not use the ubiquitous electric current of pulse-width modulation circuit discontinuous, has alleviated the big and big defective of EMI radiation of device impact stress, has reduced the requirement to the circuit elements device performance.
Description of drawings
Fig. 1 is typical fluorescent lamp circuit based on the UBA2211 integrated circuit, takes from the databook of such device, and no dimming function is as the analysis of control circuit of this light adjusting circuit.Each frame of broken lines among Fig. 1 is and makes things convenient for file of the present invention to describe, the mark that artificial circuit function module of dividing and interpolation thereof are got on.
Fig. 2 is the UBA2211 integrated circuit pin figure of 14 pin packing forms.
Fig. 3 is the UBA2211 integrated circuit pin figure of 8 pin packing forms.
Fig. 4 is basic functional principle figure of the present invention.
Fig. 5 is R of the present invention
OSC-C
OSCThe FREQUENCY CONTROL R-C interlock light-adjusting module Dim of associating light modulation
CoImplement the circuit diagram case.
Embodiment
The course of work of the circuit of electronic ballast that Fig. 1 is traditional has been made detailed description in background technology.The present invention of Fig. 4 mainly improves and is: with (fixing) frequency control module that FREQUENCY CONTROL light-adjusting module Dim replaces Fig. 1, realized UBA2211 integrated circuit frequency conversion output; With ballast, startup and the fluorescent tube module of ballast, startup, fluorescent tube and filament heat preservation module replacement Fig. 1, to keep the filament temperature under the low-power.
Circuit part of the present invention can be divided into 4 work/functional modules: the AC-DC modular converter, and identical with the AC-DC modular converter of Fig. 1; The control integrated circuit modules, identical with the control integrated circuit modules of Fig. 1; FREQUENCY CONTROL light-adjusting module Dim; Ballast, startup, fluorescent tube and filament heat preservation module.
Set forth the present invention below in conjunction with Fig. 4.
The AC-DC modular converter: the live wire L_L of AC power supplies AC input connects surge and suppresses resistance R
FUSEAn end, surge suppresses resistance R
FUSEThe positive pole of another termination first rectifier diode D1, and the negative pole of the second rectifier diode D2, the negative pole of the first rectifier diode D1 connects the negative pole of the 4th rectifier diode D4, power supply filter capacitor C
BUFAn end, with filter inductor L
FILTAn end; Filter inductor L
FILTAnother termination first filtering-output capacitor C
OUT1An end, with the DC high pressure HV pin of the Pin 3(UBA2211 of the integrated circuit U1 of control in the integrated circuit modules); First filtering-output capacitor C
OUT1Another termination second filtering-output capacitor C
OUT2An end, an and end of ballast, startup, fluorescent tube and filament heat preservation module; Second filtering-output capacitor C
OUT2Another termination power supply filter capacitor C
BUFThe other end, the positive pole of the second rectifier diode D2, the positive pole of the 3rd rectifier diode D3, and form ground wire GND(and comprise simulation ground PGND and SGND digitally); The negative pole of the 3rd rectifier diode D3 connects the positive pole of the 4th rectifier diode D4, with the zero line L_N of AC power supplies AC input.AC-DC modular converter part is identical with the typical circuit that NXP company electronic ballast control integrated circuit UBA2211 databook provides.
The control integrated circuit modules: the first SGND(first pin Pin 1 digitally of the integrated circuit U1 in the module), the second SGND(second pin Pin 2 digitally), the 3rd SGND(the 13 pin Pin 13 digitally), the 4th SGND(the tenth pin Pin 10 digitally) and the 5th SGND(the 9th pin Pin 9 digitally) meet the ground wire GND of AC-DC modular converter after the parallel connection; DC high pressure HV(the 3rd pin Pin 3 of integrated circuit U1) meets the filter inductor L of AC-DC modular converter
FILTThe other end and first filtering-output capacitor C
OUT1The dc voltage output of the end AC-DC modular converter that forms in parallel, simulation ground PGND(the 4th pin Pin 4 of integrated circuit U1) meet the ground wire GND of AC-DC modular converter, DVDT(the 5th pin Pin 5 of integrated circuit U1) meet DVDT capacitor C
DVDTAn end, ic power VDD(the 6th pin Pin 6 of integrated circuit U1) meet VDD filtering capacitor C
VDDAn end and the input Dim 1 of FREQUENCY CONTROL light-adjusting module Dim, VDD filtering capacitor C
VDDThe ground wire GND of another termination AC-DC modular converter; RC input RC(the 7th pin Pin 7 of integrated circuit U1) meet the output Dim 2 of FREQUENCY CONTROL light-adjusting module Dim, the earth terminal Dim 3 of FREQUENCY CONTROL light-adjusting module Dim meets the ground wire GND of AC-DC modular converter; SW(the 8th pin Pin 8 of integrated circuit U1) meets SW filtering capacitor C
SWAn end, SW filtering capacitor C
SWThe ground wire GND of another termination AC-DC modular converter; FS(the 11 pin Pin 11 of integrated circuit U1) meets FS capacitor C
FSAn end, sensing input SENSE(the 12 pin Pin 12 of integrated circuit U1) connect and detect the preheat curent resistance R
SENSEAn end, detect the preheat curent resistance R
SENSEThe ground wire GND of another termination AC-DC modular converter; Power take-off OUT(the 14 pin Pin 14 of integrated circuit U1) meets DVDT capacitor C
DVDTThe other end, FS capacitor C
FSThe other end, and the other end of ballast, startup, fluorescent tube and filament heat preservation module.Not identical with the control integrated circuit modules part of frequency control module in Fig. 1 UBA2211 typical circuit that provides with control integrated circuit modules and the databook of FREQUENCY CONTROL light-adjusting module Dim.
Ballast, startup, fluorescent tube and filament heat preservation module: an end of the side lamp silk of a termination fluorescent lamp Lamp of ballast, startup, fluorescent tube and filament heat preservation module and be the first heating inductor L of the first heating LC assembly of side lamp silk insulation
Lamp1An end, the first heating inductor L
Lamp1The first heating capacitor C of another termination first heating LC assembly
Lamp1An end, the first heating capacitor C
Lamp1The other end and the lamp resonant capacitor C of a side lamp silk of another termination fluorescent lamp Lamp
LampAn end; Lamp resonant capacitor C
LampThe second heating capacitor C of another termination second heating LC assembly
Lamp2An end and the other end of the opposite side filament of fluorescent lamp Lamp, the second heating capacitor C
Lamp2The second heating inductor L of another termination second heating LC assembly
Lamp2The other end, the second heating inductor L
Lamp2The end of opposite side filament of a termination fluorescent lamp Lamp, and ballast inductance device L
LampAn end, ballast inductance device L
LampThe other end constituted the other end of ballast, startup, fluorescent tube and filament heat preservation module.
FREQUENCY CONTROL light-adjusting module Dim: the input Dim 1 of FREQUENCY CONTROL light-adjusting module Dim, the output Dim 2 of FREQUENCY CONTROL light-adjusting module Dim, the earth terminal Dim 3 of FREQUENCY CONTROL light-adjusting module Dim.The input Dim 1 of FREQUENCY CONTROL light-adjusting module Dim meets adjustable oscillation resistance R
OSCAn end, adjustable oscillation resistance R
OSCThe adjustable oscillating capacitor C of another termination
OSCAn end, and the output Dim 2 of FREQUENCY CONTROL light-adjusting module Dim, adjustable oscillating capacitor C
OSCThe earth terminal Dim 3 of another termination FREQUENCY CONTROL light-adjusting module Dim.
The input Dim 1 of FREQUENCY CONTROL light-adjusting module Dim meets ic power VDD(the 6th pin Pin 6 of integrated circuit U1) and VDD filtering capacitor C
VDDAn end, the output Dim 2 of FREQUENCY CONTROL light-adjusting module Dim meets RC input RC(the 7th pin Pin 7 of integrated circuit U1), the earth terminal Dim 3 of FREQUENCY CONTROL light-adjusting module Dim meets the ground wire GND of AC-DC modular converter;
The FREQUENCY CONTROL light-adjusting module Dim that Fig. 4 provides is fundamental diagram, by adjustable oscillation resistance R
OSC, adjustable oscillating capacitor C
OSCBoth control normal working frequency f
NomThough, have the big advantage of RC product mobility scale, it is convenient inadequately to use.Fig. 5 is the adjustable oscillation resistance of a employing-adjustable oscillating capacitor R as a further improvement on the present invention
OSC-C
OSCThe FREQUENCY CONTROL R-C interlock light-adjusting module Dim of interlock
Co
Fig. 5 is R of the present invention
OSC-C
OSCThe FREQUENCY CONTROL R-C interlock light-adjusting module Dim of associating light modulation
CoImplement circuit diagram.FREQUENCY CONTROL R-C interlock light-adjusting module Dim
CoWith connecting of external circuit: FREQUENCY CONTROL R-C interlock light-adjusting module Dim
CoInput Dim
a1 meets ic power VDD(the 6th pin Pin 6 of integrated circuit U1) and VDD filtering capacitor C
VDDAn end, FREQUENCY CONTROL R-C interlock light-adjusting module Dim
CoOutput Dim
a2 meet RC input RC(the 7th pin Pin 7 of integrated circuit U1), FREQUENCY CONTROL R-C interlock light-adjusting module Dim
CoEarth terminal Dim
a3 meet the ground wire GND of AC-DC modular converter, FREQUENCY CONTROL R-C interlock light-adjusting module Dim
Co Power end Dim
a4 connect the DC high pressure HV pin of the Pin 3(UBA2211 of integrated circuit U1).
FREQUENCY CONTROL R-C interlock light-adjusting module Dim
CoInternal circuit: FREQUENCY CONTROL R-C interlock light-adjusting module Dim
CoInput Dim
a1 meets the first fixing oscillation resistance R
OSCAn end of 1, the first oscillation resistance R
OSCOne of another termination duplex potentiometer of 1---the second variable oscillation resistance R
OSCAn end of 2, the second oscillation resistance R that one of duplex potentiometer is variable
OSCThe second oscillation resistance R that one of another termination duplex potentiometer of 2 is variable
OSC2 movable end, the first built-in oscillation capacitor C
OSCAn end of 1, the second built-in oscillation capacitor C
OSCAn end of 2, and FREQUENCY CONTROL R-C interlock light-adjusting module Dim
CoOutput Dim
a2; The second built-in oscillation capacitor C
OSCThe negative pole of another termination variable capacitance diode D5 of 2 and the end of isolation resistance Rv1, the movable end of two Rv2 of another termination duplex potentiometer of isolation resistance Rv1, the other end of the termination dropping resistor Rv3 of two Rv2 of duplex potentiometer, the end of step-down filtering capacitor Cv; The termination FREQUENCY CONTROL R-C interlock light-adjusting module Dim of dropping resistor Rv3
Co Power end Dim
a4; The other end of another termination step-down filtering capacitor Cv of two Rv2 of duplex potentiometer, the positive pole of variable capacitance diode D5, the first built-in oscillation capacitor C
OSC1 the other end, and FREQUENCY CONTROL R-C interlock light-adjusting module Dim
CoEarth terminal Dim
a3.
Normal working frequency of the present invention (total power) f
NomSelect 20～35kHz to be advisable, reach highest frequency 40～55kHz after the light modulation; Lower operating frequency is fit to the market magnetic material.
Among the present invention, the reference parameter of each components and parts of circuit is as follows:
Surge suppresses resistance R
FUSE-10 Ω/1W, the rectifier diode D1～D4-1N4007 of bridge rectifier, power supply filter capacitor C
BUF-4.7 μ F/400V, filter inductor L
FILT-2mH, first filtering-output capacitor C
OUT1With second filtering-output capacitor C
OUT2-150nF/250V detects the preheat curent resistance R
SENSE-1.8 Ω/1/4W, SW filtering capacitor C
SW-100nF/50V, FS capacitor C
FS-10nF/50V, DVDT capacitor C
DVDT-220pF/1000V, VDD filtering capacitor C
VDD-100nF/50V, ballast inductance device L
Lamp-3～4mH/EE16 magnetic core, lamp resonant capacitor C
Lamp-2.2～3.3nF/1000V, oscillation resistance R
OSC-100～133k Ω/1/4W, oscillating capacitor C
OSC-220～330pF/50V, the first heating capacitor C
Lamp1,The second heating capacitor C
Lamp2-1～2nF/50V, the first heating inductor L
Lamp1, the second heating inductor L
Lamp2-several μ H, two Rv2 of duplex potentiometer: about dropping resistor Rv3-1:9, duplex potentiometer-68～100k Ω/1/4W, the first oscillation resistance R
OSC1-50～68k Ω/1/8W, the first built-in oscillation capacitor C
OSC1-100～180pF/50V, the second built-in oscillation capacitor C
OSC2-200～330pF/50V, variable capacitance diode D5-transfiguration scope 30～300 pF, isolation resistance Rv1-330～510k Ω/1/8W, step-down filtering capacitor Cv-1～4.7 μ F/50V.
Claims (2)
1. based on the frequency conversion light adjusting circuit of UBA2211, comprise AC-DC modular converter, control integrated circuit modules, FREQUENCY CONTROL light-adjusting module and ballast, startup, fluorescent tube and filament heat preservation module, it is characterized in that: described ballast, startup, fluorescent tube and filament heat preservation module comprise the first heating LC assembly, the second heating LC assembly, lamp resonant capacitor C
Lamp, fluorescent lamp Lamp and ballast inductance device L
LampOne end of the first heating LC assembly is connected with an end of fluorescent lamp Lamp one side, first other end that heats the LC assembly respectively with the other end, the lamp resonant capacitor C of fluorescent lamp Lamp one side
LampAn end connect; One end and the ballast inductance device L of the second heating LC assembly
LampAn end of an end, fluorescent lamp Lamp opposite side connect, the other end of the second heating LC assembly respectively with the other end, the lamp resonant capacitor C of fluorescent lamp Lamp opposite side
LampThe other end connect; Ballast inductance device L
LampAnother termination control integrated circuit modules in the OUT pin of UBA2211 chip;
The described first heating LC assembly comprises the first heating inductor L
Lamp1, the first heating capacitor C
Lamp1The first heating inductor L
Lamp1With the first heating capacitor C
Lamp1Serial connection;
The described second heating LC assembly comprises the second heating inductor L
Lamp2, the second heating capacitor C
Lamp2The second heating inductor L
Lamp2With the second heating capacitor C
Lamp2Serial connection;
The oscillation resistance R of described FREQUENCY CONTROL light-adjusting module
OSC, oscillating capacitor C
OSCForm the RC conditioned circuit, oscillation resistance R
OSCTermination control integrated circuit modules in the VDD pin of UBA2211 chip, oscillation resistance R
OSCThe other end, oscillating capacitor C
OSCTermination control integrated circuit modules in the RC pin of UBA2211 chip, oscillating capacitor C
OSCOther end ground connection; Described oscillation resistance R
OSCThe adjustable or described oscillating capacitor C of resistance
OSCCapacitance adjustable, FREQUENCY CONTROL light-adjusting module normal working frequency is selected 20～35kHz, reaches highest frequency 40～55kHz after the light modulation;
Described oscillation resistance R
OSCComprise the first oscillation resistance R that resistance is fixing
OSC1 and the second variable oscillation resistance R of resistance
OSC2, the first oscillation resistance R
OSC1 and the second oscillation resistance R
OSC2 series connection; Described oscillating capacitor C
OSCComprise the first built-in oscillation capacitor C
OSC1, the second built-in oscillation capacitor C
OSC2 and variable capacitance diode D5, the first built-in oscillation capacitor C
OSCAn end of 1, the second built-in oscillation capacitor C
OSCAn end parallel connection of 2 is as oscillating capacitor C
OSCAn end, the second built-in oscillation capacitor C
OSCThe negative pole of another termination variable capacitance diode D5 of 2, the positive pole of variable capacitance diode D5, the first built-in oscillation capacitor C
OSC1 other end parallel connection is as oscillating capacitor C
OSCThe other end; Also comprise isolation resistance Rv1, duplex potentiometer Rv2, dropping resistor Rv3 and step-down filtering capacitor Cv; The negative pole of the termination variable capacitance diode D5 of isolation resistance Rv1, the movable end of another termination duplex potentiometer Rv2 of isolation resistance Rv1, the other end of the termination dropping resistor Rv3 of duplex potentiometer Rv2, the end of step-down filtering capacitor Cv; The HV pin of UBA2211 chip in the termination control integrated circuit modules of dropping resistor Rv3; The other end of another termination step-down filtering capacitor Cv of duplex potentiometer Rv2, the positive pole of variable capacitance diode D5; Described oscillation resistance R
OSCWith oscillating capacitor C
OSCAdjust simultaneously.
2. based on the light-dimming method of the frequency conversion light adjusting circuit of UBA2211, the frequency conversion light adjusting circuit based on UBA2211 wherein comprises AC-DC modular converter, control integrated circuit modules, FREQUENCY CONTROL light-adjusting module and ballast, startup, fluorescent tube and filament heat preservation module, and described ballast, startup, fluorescent tube and filament heat preservation module comprise the first heating LC assembly, the second heating LC assembly, lamp resonant capacitor C
Lamp, fluorescent lamp Lamp and ballast inductance device L
LampOne end of the first heating LC assembly is connected with an end of fluorescent lamp Lamp one side, first other end that heats the LC assembly respectively with the other end, the lamp resonant capacitor C of fluorescent lamp Lamp one side
LampAn end connect; One end and the ballast inductance device L of the second heating LC assembly
LampAn end of an end, fluorescent lamp Lamp opposite side connect, the other end of the second heating LC assembly respectively with the other end, the lamp resonant capacitor C of fluorescent lamp Lamp opposite side
LampThe other end connect; Ballast inductance device L
LampAnother termination control integrated circuit modules in the OUT pin of UBA2211 chip;
The described first heating LC assembly comprises the first heating inductor L
Lamp1, the first heating capacitor C
Lamp1The first heating inductor L
Lamp1With the first heating capacitor C
Lamp1Serial connection;
The described second heating LC assembly comprises the second heating inductor L
Lamp2, the second heating capacitor C
Lamp2The second heating inductor L
Lamp2With the second heating capacitor C
Lamp2Serial connection;
The oscillation resistance R of described FREQUENCY CONTROL light-adjusting module
OSC, oscillating capacitor C
OSCForm the RC conditioned circuit, oscillation resistance R
OSCTermination control integrated circuit modules in the VDD pin of UBA2211 chip, oscillation resistance R
OSCThe other end, oscillating capacitor C
OSCTermination control integrated circuit modules in the RC pin of UBA2211 chip, oscillating capacitor C
OSCOther end ground connection; Described oscillation resistance R
OSCThe adjustable or described oscillating capacitor C of resistance
OSCCapacitance adjustable, FREQUENCY CONTROL light-adjusting module normal working frequency is selected 20～35kHz, reaches highest frequency 40～55kHz after the light modulation; It is characterized in that: adjust the output frequency of frequency conversion light adjusting circuit by the time constant of regulating the RC conditioned circuit, realize that the gaseous discharge lamp power of frequency conversion light adjusting circuit is adjusted.
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| CN2011102254719A CN102355787B (en) | 2011-08-08 | 2011-08-08 | Method and circuit for variable frequency dimming based on UBA2211 |
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|---|---|---|---|
| CN2011102254719A CN102355787B (en) | 2011-08-08 | 2011-08-08 | Method and circuit for variable frequency dimming based on UBA2211 |
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| CN102355787B true CN102355787B (en) | 2013-09-25 |
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| CN101969734B (en) * | 2010-10-28 | 2015-07-22 | 杭州电子科技大学 | Method for performing variable frequency dimming on fluorescent lamp based on UBA2014 |
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| Title |
|---|
| 恩智浦半导体公司.驱动CFL的半桥功率集成电路产品数据手册.《UBA2211》.恩智浦半导体公司,2011, * |
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| Publication number | Publication date |
|---|---|
| CN102355787A (en) | 2012-02-15 |
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