CN2636584Y - Manual dimming electron ballast - Google Patents
Manual dimming electron ballast Download PDFInfo
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- CN2636584Y CN2636584Y CN 03272963 CN03272963U CN2636584Y CN 2636584 Y CN2636584 Y CN 2636584Y CN 03272963 CN03272963 CN 03272963 CN 03272963 U CN03272963 U CN 03272963U CN 2636584 Y CN2636584 Y CN 2636584Y
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Abstract
The utility model discloses a manual dimming electric ballast, which relates to a fitting part of a lighting equipment, in particular to a dimmable daylight lamp electric ballast. The circuit of the electric ballast mainly consists of an EMC/EMI filter circuit, a rectification filter circuit, a half-bridge drive control inverter circuit, a high frequency drive detection circuit, a light-regulating and controlling integrated chip IC1, a direct current operational power circuit, an abnormal state detection protective circuit, a lamp tube streak suppression circuit, and a light-regulating control circuit, wherein the integrated chip IC1 controls the on state current of the half-bridge drive control circuit, to achieve the purpose that the operating current of the lamp tube is regulated. An operational amplifier is connected with the high frequency drive detection circuit and a light-regulating circuit, the light-regulating circuit and a drive circuit form closed loop control, therefore the light regulating depth can be increased, the range is wide, the following performance is good, the light regulating linearity is high, the designed protective circuit is optimized, the service life of the lamp tube is effectively prolonged, therefore being applied to the light regulation of a variety of fluorescent lamps, in particular suitable for the light regulation of a T5 lamp tube, a T8 lamp tube, and other energy saving lamp tube.
Description
Technical field
The utility model relates to a kind of accessory of lighting apparatus, is specifically related to a kind of electronic ballast for fluorescent lamp of tunable optical.
Background technology
Electric ballast as the Green Lighting Project leading products has from heavy and light, characteristics such as self-heating is low, conversion efficiency is high (energy-conservation), starter characteristic is good, no stroboscopic, more and more is used widely.The florescent lamp fitting of adapted electric ballast, because its light efficiency height, color rendering are good, little power consumption, the life-span is long and the appearance of various novel high-efficiency and energy-saving green light sources, florescent lamp fitting is still the light fixture that present room lighting generally uses.Dimming electronic ballast belongs to a branch of electric ballast, it is except that the advantage that possesses electric ballast, also have the tunable optical function, and that existing dimming electronic ballast is handled aspect Electro Magnetic Compatibility is not ideal enough, can cause that light output is non-constant, cost is too high in the linearity light adjusting narrow range, operating difficulties, light modulation process.
The utility model content
In order to overcome the shortcoming that above-mentioned prior art exists, the utility model provides that a kind of circuit design has that high reliability, light modulation good linearity, dimming scope are big, circuit structure simply, manual dimming electronic ballast cheaply.
The utility model provides following technical scheme; a kind of manual dimming electronic ballast; the circuit of this ballast is mainly by the EMI/EMC filter circuit; current rectifying and wave filtering circuit; half-bridge driven control inverter circuit; the high-frequency drive testing circuit; light modulation and control integrated chip IC 1; dc working power circuit; the abnormal state detection protective circuit; the fluorescent tube striped suppresses circuit and adjusting control circuit etc. and partly forms; AC power is after protective circuit; connect current rectifying and wave filtering circuit by the EMI/EMC filter circuit; current rectifying and wave filtering circuit connects the input of half-bridge driven control inverter circuit; light modulation and the output control terminal of controlling integrated chip IC 1 connect half-bridge driven control inverter circuit input; adjusting control circuit connects light modulation and controls the dim signal reference voltage end of integrated chip IC 1; after light modulation and controlling integrated chip IC 1 inter-process; the input in the same way that connects the internal arithmetic amplifier by the dimming control signal output; the output of half-bridge driven control inverter circuit connects the high-frequency drive testing circuit; the high-frequency drive testing circuit connects light modulation and controls the reverse input end of integrated chip IC 1 internal arithmetic amplifier; via the operational amplifier output signal by light modulation and control the output control terminal control half-bridge driven control inverter circuit power amplifier Q1 of integrated chip IC 1; the conducting electric current of Q2; reach the light modulation purpose; half-bridge driven control inverter circuit suppresses circuit by the fluorescent tube striped and connects luminous lamp tube; current rectifying and wave filtering circuit connects the power end of adjusting control circuit and integrated chip successively through DC power supply circuit and protective circuit.
Described EMI/EMC filtered electrical routing transformer T1 and capacitor C 1 are formed; capacitor C 1 is connected in the secondary of transformer T1 in parallel; the former limit of transformer T1 is connected in parallel to anti-lightning strike resistance VR; be connected in series with Automatic Protection Switching F1, current rectifying and wave filtering circuit comprises that the full-wave rectification bridge, filter capacitor C2, C3, C4, the inductance T2 that are made up of diode D1, D2, D3, D4 form.
Described half-bridge driven control circuit is by two power amplifier Q1, Q2, resistance R 1～R3, R14 capacitor C 5, C7, diode D5, D6 and inductance T3 form, the source electrode of power amplifier Q1 connects the drain electrode of power amplifier Q2, and connect light modulation and control the output control terminal of integrated chip IC 1, suppress circuit by the fluorescent tube striped simultaneously and connect luminous lamp tube, the inductance T3 that is connected in series after fluorescent tube striped inhibition circuit is connected in parallel by resistance R 14 and capacitor C 7 forms, the grid of power amplifier Q1 is connected light modulation by the diode D5 that is connected in parallel with resistance R 2 and controls the high-end MOSFET drive end of integrated chip IC 1, the grid of power amplifier Q2 is connected light modulation by the diode D6 that is connected in parallel with resistance R 3 and controls integrated chip IC 1 low side MOSFET drive end, the source electrode of power amplifier Q1 connects the inductance T2 of current rectifying and wave filtering circuit, the source electrode of power amplifier Q2 connects source resistance, and with source current after resistance R 4 converts voltage signal to, connect light modulation and control the reverse input end of integrated chip IC 1 internal arithmetic device.
Described abnormal state detection protective circuit is made up of resistance R 8, R9, R13, R15, diode D10, D11 voltage-stabiliser tube DZ2, controllable silicon Q3.
Described fluorescent tube striped suppresses circuit and is made up of resistance R 14, capacitor C 7, C16, inductance T3, the resistance R 14 inductance T3 that is connected in series after the capacitor C 7 that is connected in parallel.
Described adjusting control circuit is connected in series with adjustable resistance RV by fixed resistance R6, the R7 of two series connection and forms, adjustable resistance RV is connected in parallel to capacitor C 14, the fixed resistance R6 that two are connected in series, the contact of R7 connect light modulation and control the light modulation operation control end of integrated chip IC 1, and the other end of the fixed resistance R6 of adjusting control circuit connects light modulation and controls the light modulation dim signal reference voltage end of integrated chip IC 1.
Described light modulation and the working dc power circuit of controlling integrated chip IC 1 are made up of capacitor C 17, C18, diode D12, D13 and voltage-stabiliser tube DZ1 and resistance R 12.
Described light modulation and control integrated chip IC 1, inner partly being electrically connected by drive controlling and dim signal processing two forms, wherein drive controlling partly is made up of operational amplifier, voltage controlled oscillator, under-voltage detection, control logic, driving logic, boostrap circuit, comparator, high low-end driver etc., and its dim signal is handled partly and is made up of operational amplifier, Drive and Control Circuit etc.
The utility model possesses following advantage: owing to used light modulation and controlled the conducting electric current that integrated chip IC 1 is controlled the half-bridge driven control circuit; reach the purpose of regulating the lamp works electric current; light modulation and control the operational amplifier of integrated chip IC 1 and being connected of high-frequency drive testing circuit and light adjusting circuit; make light adjusting circuit and drive circuit constitute closed-loop control; the light modulation degree of depth can strengthen; scope is wide; followability is good; light modulation linearity height; the optimal design of its protective circuit; the product reliability height has effectively prolonged useful life of fluorescent tube.
Description of drawings
Fig. 1 is an electrical principle block diagram of the present utility model.
Fig. 2 is an electrical schematic diagram of the present utility model
Embodiment
As Fig. 1; shown in Figure 2; a kind of manual dimming electronic ballast; circuit is mainly by the EMI/EMC filter circuit; current rectifying and wave filtering circuit; half-bridge driven control inverter circuit; the high-frequency drive testing circuit; light modulation and control integrated chip IC 1; dc working power circuit; the abnormal state detection protective circuit; the fluorescent tube striped suppresses circuit and adjusting control circuit etc. and partly forms; AC power is after protective circuit; connect current rectifying and wave filtering circuit by the EMI/EMC filter circuit; current rectifying and wave filtering circuit connects the input of half-bridge driven control inverter circuit; light modulation and the output control terminal of controlling integrated chip IC 1 connect half-bridge driven control inverter circuit input; adjusting control circuit connects light modulation and controls the dim signal reference voltage end of integrated chip IC 1; after light modulation and controlling integrated chip IC 1 inter-process; the input in the same way that connects the internal arithmetic amplifier by the dimming control signal output; the output of half-bridge driven control inverter circuit connects the high-frequency drive testing circuit; the high-frequency drive testing circuit connects light modulation and controls the reverse input end of integrated chip IC 1 internal arithmetic amplifier; via the operational amplifier output signal by light modulation and control the output control terminal control half-bridge driven control inverter circuit power amplifier Q1 of integrated chip IC 1; the conducting electric current of Q2; reach the light modulation purpose; half-bridge driven control inverter circuit suppresses circuit by the fluorescent tube striped and connects luminous lamp tube; current rectifying and wave filtering circuit connects the power end of adjusting control circuit and integrated chip successively through DC power supply circuit and protective circuit.
EMI/EMC filtered electrical routing transformer T1 and capacitor C 1 are formed; capacitor C 1 is connected in the secondary of transformer T1 in parallel; the former limit of transformer T1 is connected in parallel to anti-lightning strike resistance VR; be connected in series with Automatic Protection Switching F1, current rectifying and wave filtering circuit comprises that the full-wave rectification bridge, filter capacitor C2, C3, C4, the inductance T2 that are made up of diode D1, D2, D3, D4 form.
The half-bridge driven control circuit is by two power amplifier Q1, Q2, resistance R 1～R3, R14 capacitor C 5, C7, diode D5, D6 and inductance T3 form, the source electrode of power amplifier Q1 connects the drain electrode of power amplifier Q2, and connect light modulation and control the output control terminal of integrated chip IC 1, suppress circuit by the fluorescent tube striped simultaneously and connect luminous lamp tube, the inductance T3 that is connected in series after fluorescent tube striped inhibition circuit is connected in parallel by resistance R 14 and capacitor C 7 forms, the grid of power amplifier Q1 is connected light modulation by the diode D5 that is connected in parallel with resistance R 2 and controls the high-end MOSFET drive end of integrated chip IC 1, the grid of power amplifier Q2 is connected light modulation by the diode D6 that is connected in parallel with resistance R 3 and controls integrated chip IC 1 low side MOSFET drive end, the source electrode of power amplifier Q1 connects the inductance T2 of current rectifying and wave filtering circuit, the source electrode of power amplifier Q2 connects source resistance, and with source current after resistance R 4 converts voltage signal to, connect light modulation and control the reverse input end of integrated chip IC 1 internal arithmetic device.
The abnormal state detection protective circuit is made up of resistance R 8, R9, R13, R15, diode D10, D11 voltage-stabiliser tube DZ2, controllable silicon Q3.
The fluorescent tube striped suppresses circuit and is made up of resistance R 14, capacitor C 7, C16, inductance T3, the resistance R 14 inductance T3 that is connected in series after the capacitor C 7 that is connected in parallel.
Adjusting control circuit is connected in series with adjustable resistance RV by fixed resistance R6, the R7 of two series connection and forms, adjustable resistance RV is connected in parallel to capacitor C 14, the fixed resistance R6 that two are connected in series, the contact of R7 connect light modulation and control the light modulation operation control end of integrated chip IC 1, and the other end of the fixed resistance R6 of adjusting control circuit connects light modulation and controls the light modulation dim signal reference voltage end of integrated chip IC 1.
Light modulation and the working dc power circuit of controlling integrated chip IC 1 are made up of capacitor C 17, C18, diode D12, D13 and voltage-stabiliser tube DZ1 and resistance R 12.
Light modulation and control integrated chip IC 1 is innerly handled two by drive controlling and dim signal and partly is electrically connected and forms.Wherein drive controlling partly is made up of operational amplifier, voltage controlled oscillator, under-voltage detection, control logic, driving logic, boostrap circuit, comparator, high low-end driver etc., and its dim signal is handled partly and is made up of operational amplifier, Drive and Control Circuit etc.
Below in conjunction with accompanying drawing to the explanation that makes an explanation of its circuit working principle.
Light modulation and to control the pin function of integrated chip IC 1 as follows:
IC1-1 Vboot (Bootstrapped Supply Voltage) internal circuit constitutes boostrap circuit control;
The high-end MOSFET of IC1-2 HVG drives;
IC1-3 High Side Driver Reference high-side driver detects;
The IC1-4 drive controlling is the power filter loop partly;
IC1-5 LVG low side MOSFET drives;
IC1-6 Half Bridge Enable drive controlling;
IC1-7?GND?Ground；
IC1-8?GND?Ground；
The input of IC1-9 Opin-(Inverting Input of the operational amplifier) external detection;
The control of IC1-10 dim signal;
IC1-11?GND?Ground；
The partly dimming control signal input of IC1-12 drive controlling;
IC1-13 light modulation operation control;
The IC1-14 dim signal is handled the dim signal output control after partly handling;
IC1-15?GND?Ground；
The IC1-16 dim signal is power supply partly;
The IC1-17 dim signal is gathered reference voltage;
The IC1-18 drive controlling is power supply partly.
This dimming electronic ballast operation principle is as follows:
The ac grid voltage of 220V is after T1, C1 filtering, one end is added on the negative pole of anodal D3 of the D1 of rectification circuit, the other end is added on the negative pole of the anodal D4 of D2, an end that links to each other at D1 negative pole, D2 negative pole obtains the moving direct voltage of line with D3 positive pole, the anodal end that links to each other of D4, behind the first order DC filtering circuit filtering that is composed in series via C2, C3, obtain the direct voltage of level and smooth＞310V, the LC filter circuit of forming via T2, C4 obtains highly stable direct voltage at the two ends of C4 again.
Obtain the galvanic current pressure and be added on half-bridge drive circuit, current rectifying and wave filtering circuit via C17, C18, D12, D13, DZ1, C12, C13, R12 composition obtains the direct voltage of 12V, offer the 18th pin of IC1 through D9, IC1 work this moment, the half-bridge drive circuit that peripheral circuit constitutes cooperate with the IC1 internal circuit finishes that the tube cathode preheating is lit a lamp and lamp is just lighted.
The frequency of oscillation of the voltage-controlled oscillator (VCO) by changing IC1 inside can realize the control to lamp current.12 pin of IC1 are that dimming control signal is imported it and linked to each other with the operational amplifier in-phase input end of IC1 inside, the voltage of this pin is 14 pin by IC1, dim signal output decision after the IC1 inter-process, and the output of 14 pin of IC1 provides R6, the R7 of reference voltage and RV resitstance voltage divider to be determined by 17 pin of IC1, handle partly at the inner integrated dim signal of IC1 and to handle after its operational amplifier, Drive and Control Circuit are obtaining forming the obtained signal of resitstance voltage divider by R6, R7 and RV, guarantee that 14 pin of IC1 obtain control signal stable, linearity.The source resistance of the low-end switch Q2 of half-bridge drive circuit (being composed in parallel by R10 and R11) is as the detection resources electrode current, and is that voltage signal is delivered to the internal arithmetic amplifier's inverting input through R4 through 9 pin of IC1 with current conversion.Through inter-process, before lamp igniting, 9 pin of IC1 are in low level always, and IC1 internal dimming input rests on the light modulation reference voltage value that 10 pin peripheral circuits by itself and IC1 constitute.Along with the igniting after the lamp preheating, the voltage that R10 and R11 parallel connection obtain increases, and feeds back to IC1 internal arithmetic amplifier, and operational amplifier is then fulfiled lamp closed-loop control function to lamp current during normal ignition.Regulate RV, cause the 13 pin input of IC1 to change, influence the 12 pin input of IC1, thereby the input size variation of 12 pin of IC1 is adjusted the average lamp current size, thus the intensity of the light of control power output.
The light modulation loop of IC1 and external circuit formation can obtain extremely wide dimming scope and reach 3%～100%.
Defencive function has input over-voltage over-current protection, half-bridge driven over-current over-voltage protection, the protection of no lamp.
The input over-voltage over-current protection circuit is made of the VR of F1.
The half-bridge driven overcurrent-overvoltage protecting circuit is made up of R8, R9, R10, R11, R13, Q3, DZ2, D10, D11, C19, and the realization of its protection mainly is the conducting of control Q3 reaches protection fluorescent tube and ballast with the output of control IC 1 a purpose.
No lamp protection is made up of R8, R9, R10, R11, R13, R15, Q3, DZ2, D10, D11, C19.The realization of its protection mainly is the conducting of control Q3 reaches protection fluorescent tube and ballast with the output of control IC 1 a purpose.
The fluorescent tube striped suppresses circuit and is made up of C7, C16, R14, IC1, at first the linear adjustment of VCO is handled in IC1 inside, half driving in the periphery is equipped with C7, C16, R14, makes each state in light modulation, and fluorescent tube all flicker and cirrus or fringe phenomena can not occur.
Manually dimming ballast extensively should be in various fluorescent tube light modulations for these, and is strong to the adaptability of fluorescent tube, goes for T5 fluorescent tube, T8 fluorescent tube and other power saving fluorescent lamps.
Claims (5)
1. manual dimming electronic ballast; it is characterized in that: the circuit of this ballast is mainly by the EMI/EMC filter circuit; current rectifying and wave filtering circuit; half-bridge driven control inverter circuit; the high-frequency drive testing circuit; light modulation and control integrated chip (IC1); dc working power circuit; the abnormal state detection protective circuit; the fluorescent tube striped suppresses circuit and adjusting control circuit etc. and partly forms; AC power is after protective circuit; connect current rectifying and wave filtering circuit by the EMI/EMC filter circuit; current rectifying and wave filtering circuit connects the input of half-bridge driven control inverter circuit; the output control terminal of light modulation and control integrated chip (IC1) connects half-bridge driven control inverter circuit input; adjusting control circuit connects the dim signal reference voltage end of light modulation and control integrated chip (IC1); after light modulation and control integrated chip (IC1) inter-process; the input in the same way that connects the internal arithmetic amplifier by the dimming control signal output; the output of half-bridge driven control inverter circuit connects the high-frequency drive testing circuit; the high-frequency drive testing circuit connects the reverse input end of light modulation and control integrated chip (IC1) internal arithmetic amplifier; via the output control terminal control half-bridge driven control inverter circuit power amplifier (Q1 of operational amplifier output signal by light modulation and control integrated chip (IC1); Q2) conducting electric current; reach the light modulation purpose; half-bridge driven control inverter circuit suppresses circuit by the fluorescent tube striped and connects luminous lamp tube; current rectifying and wave filtering circuit connects the power end of adjusting control circuit and integrated chip successively through DC power supply circuit and protective circuit.
2. manual dimming electronic ballast as claimed in claim 1; it is characterized in that: described EMI/EMC filtered electrical routing transformer (T1) and electric capacity (C1) are formed; electric capacity (C1) is connected in the secondary of transformer (T1) in parallel; the former limit of transformer (T1) is connected in parallel to anti-lightning strike resistance (VR); be connected in series with Automatic Protection Switching (F1); current rectifying and wave filtering circuit comprises that (D1, pipe striped suppress circuit and be made up of resistance (R14), electric capacity (C7, C16), inductance (T3), resistance (R14) inductance (T3) that is connected in series behind the electric capacity (C7) that is connected in parallel by diode.
6. manual dimming electronic ballast as claimed in claim 1 is characterized in that: described abnormal state detection protective circuit is made up of resistance (R8, R9, R13, R15), diode (D10, D11), voltage-stabiliser tube (DZ2), controllable silicon (Q3).
7. manual dimming electronic ballast as claimed in claim 1 is characterized in that: the working dc power circuit of light modulation and control integrated chip (IC1) is made up of electric capacity (C17, C18), diode (D12, D13) and voltage-stabiliser tube (DZ1) and resistance (R12).
8. manual dimming electronic ballast as claimed in claim 1, it is characterized in that: described light modulation and control integrated chip (IC1), inner partly being electrically connected by drive controlling and dim signal processing two forms, wherein drive controlling partly is made up of operational amplifier, voltage controlled oscillator, under-voltage detection, control logic, driving logic, boostrap circuit, comparator, high low-end driver etc., and its dim signal is handled partly and is made up of operational amplifier, Drive and Control Circuit etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03272963 CN2636584Y (en) | 2003-06-13 | 2003-06-13 | Manual dimming electron ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03272963 CN2636584Y (en) | 2003-06-13 | 2003-06-13 | Manual dimming electron ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2636584Y true CN2636584Y (en) | 2004-08-25 |
Family
ID=34301285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03272963 Expired - Fee Related CN2636584Y (en) | 2003-06-13 | 2003-06-13 | Manual dimming electron ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2636584Y (en) |
-
2003
- 2003-06-13 CN CN 03272963 patent/CN2636584Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |