CN207124788U - A kind of high power factor is without stroboscopic light adjusting circuit - Google Patents
A kind of high power factor is without stroboscopic light adjusting circuit Download PDFInfo
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- CN207124788U CN207124788U CN201721031849.0U CN201721031849U CN207124788U CN 207124788 U CN207124788 U CN 207124788U CN 201721031849 U CN201721031849 U CN 201721031849U CN 207124788 U CN207124788 U CN 207124788U
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Abstract
The utility model provides a kind of high power factor without stroboscopic light adjusting circuit, and vice-side winding L2 is in charging process, and civil power is simultaneously to the power supply of output LED module and electrolysis C5 chargings；When the vice-side winding charging reaches boost control chip IC1 setting value, boost control chip IC1 control vice-side winding L2 electric discharges；The L2 electric currents that L2 is released in discharge process and civil power are powered to the LED module together, and the electrolysis C5 is charged；The voltages keep constant at the electrolysis C5 both ends.The utility model provides a kind of gearshift light adjusting circuit, and circuit efficiency is high, power factor ＞ more than 0.9, power-efficient more than 85%, and has the characteristics of without stroboscopic.
Description
Technical field
It the utility model is related to a kind of LED circuit, more particularly to LED light adjusting circuits.
Background technology
The light adjusting circuit reduction voltage circuit and step-up/step-down circuit to circulate on the market, has power network working frequency ripple wave, and efficiency generally exists
Less than 80%.
Utility model content
Technical problem underlying to be solved in the utility model is to provide a kind of gearshift light adjusting circuit, and circuit efficiency is high, work(
Rate factor ＞ more than 0.9, power-efficient more than 85%, and there is the characteristics of without stroboscopic.
In order to solve above-mentioned technical problem, the utility model provides a kind of high power factor without stroboscopic light adjusting circuit,
The ac input end of AC power and rectification circuit connects, and the cathode output end of the rectification circuit is connected to change by inductance L1
Depressor vice-side winding L2 one end, the vice-side winding L2 other end are connected to the positive pole of output LED module by diode D1；Institute
State the cathode output end ground connection of rectification circuit；
The both ends of the inductance L1 are in parallel with resistance R1, and resistance R1 one end is grounded by electric capacity C1, and the other end connects
It is connected to electric capacity C2 one end, the electric capacity C2 other end is connected to a common port of parallel resistance R2A, R2B, parallel resistance R2A,
R2B another common end grounding；The inductance L1 is grounded with one end that vice-side winding L2 is connected by electric capacity C3；
The vice-side winding L2 is additionally coupled to boost control chip IC1 DRAIN with one end that diode D1 anodes are connected
Stitch；The negative electrode of the diode D1 is connected to boost control chip IC1 VCC pin by series resistance R3, R4, described
VCC pin is grounded by electric capacity C4；
The FB pins of the boost control chip IC1 are connected to the positive pole of output LED module by series resistance R6, R7；
Connected between the FB pins and GND pin of the control chip by electric capacity C5, electric capacity C5 both ends are in parallel with resistance R5；Institute
The CS pins for stating boost control chip IC1 are connected to GND pin by resistance Rs1, and the CS of the boost control chip IC1 draws
Pin is grounded by resistance Rs2；
The negative electrode of the diode D1 is additionally coupled to be electrolysed C5 positive pole, is electrolysed C5 negative pole ground connection；The electrolysis C5's
Both ends are in parallel with resistance R9；The negative pole of the output LED module is connected to the output end of linear constant current chip IC 2；Linear constant current
The CS ends of chip IC 2 are grounded by resistance R8；
The vice-side winding L2 is in charging process, and civil power is simultaneously to the power supply of output LED module and electrolysis C5 chargings；Institute
Vice-side winding charging is stated when reaching boost control chip IC1 setting value, boost control chip IC1 controls vice-side winding L2 is put
Electricity；The L2 electric currents that L2 is released in discharge process and civil power are powered to the LED modules together, and the electrolysis C5 is charged；
The voltages keep constant at the electrolysis C5 both ends
Compared to prior art, the technical solution of the utility model possesses following beneficial effect：
The utility model adds linear constant current scheme, efficiency high, power factor ＞ more than 0.9, power supply effect using booster circuit
Rate more than 85%, and there is the characteristics of without stroboscopic.The driving electricity that High Power Factor high efficiency of the present utility model dims without stroboscopic
Mains electricity is converted into high voltage direct current by source using rectification filtering unit by booster circuit, after boosting after filtering is electrolysed
Into steady dc voltage, LED filament lamp is followed by using linear constant current unit output Constant Direct Current, passes through constant current constant dc
LED filament lamp is supplied, the efficiency conversion of the driving power of booster circuit is high, and output voltage stabilization, hence in so that LED high-voltage lamp
It is not in stroboscopic phenomenon that silk is luminous.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model preferred embodiment.
Embodiment
The technical solution of the utility model is further detailed below by way of embodiment combination accompanying drawing and
Description.
With reference to figure 1, without stroboscopic light adjusting circuit, the ac input end of AC power and rectification circuit connects a kind of high power factor
Connect, the cathode output end of the rectification circuit is connected to transformer secondary winding L2 one end, vice-side winding L2 by inductance L1
The other end by diode D1 be connected to output LED module positive pole；The cathode output end ground connection of the rectification circuit；
The both ends of the inductance L1 are in parallel with resistance R1, and resistance R1 one end is grounded by electric capacity C1, and the other end connects
It is connected to electric capacity C2 one end, the electric capacity C2 other end is connected to a common port of parallel resistance R2A, R2B, parallel resistance R2A,
R2B another common end grounding；The inductance L1 is grounded with one end that vice-side winding L2 is connected by electric capacity C3；Above-mentioned electricity
Hold C 2 and resistance R 2A, R 2B constitute RC antihunt circuits.Its effect is to match light modulator.RC antihunt circuits are followed by leading
Circuit booster circuit, this effect are that boost switching provides efficient, steady dc voltage.LED filament lamp is followed by using linear perseverance
Flow unit.
Wherein, RC antihunt circuits are act as：If not series resistance R2A, R2B, electric capacity C1 during due to dimmer,
C2, C3 quick charge effect, it will higher voltage and current spike occur.Current spike will destroy controllable silicon light modulation
Device, it is especially particularly true when multiple LED bulb parallel connections, because the current spike sum from each LED bulb will exceed
The rated current of controllable silicon dimmer.Current oscillation occurs after current spike, electricity is maintained due to occurring to be less than in vibration
The negative current of stream, it can also cause desk lamp with dimmer switch false triggering.If due to voltage spikes exceeds breakdown voltage rating, it will destroys outside device
Part.The electric capacity C2 of RC antihunt circuits, for providing latching current and maintaining conducting electric current.In order to eliminate above-mentioned voltage and electric current point
Peak, it is necessary to which the spike is damped using bleeder resistance.
The vice-side winding L2 is additionally coupled to boost control chip IC1 DRAIN with one end that diode D1 anodes are connected
Stitch；The negative electrode of the diode D1 is connected to boost control chip IC1 VCC pin by series resistance R3, R4, described
VCC pin is grounded by electric capacity C4；
The FB pins of the boost control chip IC1 are connected to the positive pole of output LED module by series resistance R6, R7；
Connected between the FB pins and GND pin of the control chip by electric capacity C5, electric capacity C5 both ends are in parallel with resistance R5；Institute
The CS pins for stating boost control chip IC1 are connected to GND pin by resistance Rs1, and the CS of the boost control chip IC1 draws
Pin is grounded by resistance Rs2；
The negative electrode of the diode D1 is additionally coupled to be electrolysed C5 positive pole, is electrolysed C5 negative pole ground connection；The electrolysis C5's
Both ends are in parallel with resistance R9；The negative pole of the output LED module is connected to the output end of linear constant current chip IC 2；Linear constant current
The CS ends of chip IC 2 are grounded by resistance R8；
The vice-side winding L2 is in charging process, and civil power is simultaneously to the power supply of output LED module and electrolysis C5 chargings；Institute
Vice-side winding charging is stated when reaching boost control chip IC1 setting value, boost control chip IC1 controls vice-side winding L2 is put
Electricity；The L2 electric currents that L2 is released in discharge process and civil power are powered to the LED modules together, and the electrolysis C5 is charged；
The voltages keep constant at the electrolysis C5 both ends.
Therefore, in above-mentioned circuit, input current is completely continuous, and all may be used in the sinusoidal cycles of whole defeated people's voltage
With modulation, therefore very high power factor can be obtained；The electric current of vice-side winding L2 outputs is input current, easily regulation；Rise
With pressing control chip IC1 drive signal and output common ground, driving are simple；Continuous input current, the current peak of switching tube compared with
It is small, strong adaptability is changed to input voltage, suitable for the king-sized occasion of grid voltage change.
Linear constant current chip IC 2 exports Constant Direct Current：LED filament is followed by the input of linear constant current chip IC 2, utilizes line
Metal-oxide-semiconductor inside property constant current chip IC2 is operated in the characteristics of linear permanent, the Vbe2 reference voltages inside linear constant current chip IC 2
Usually 500mV, constant output current is in Iout=Vbe2/R3.
Therefore, utilized after the stable voltage of above-mentioned technical scheme combination booster circuit output to LED filament lamp linear permanent
Unit output Constant Direct Current is flowed, LED filament lamp is supplied by constant current constant dc.Efficiency high, power factor ＞ more than 0.9,
Power-efficient more than 85%, and there is the characteristics of without stroboscopic.What High Power Factor high efficiency of the present utility model dimmed without stroboscopic
Mains electricity is converted into high voltage direct current by driving power using rectification filtering unit by booster circuit, through filtering after boosting
Into steady dc voltage after electrolysis, LED filament lamp is followed by using linear constant current unit output Constant Direct Current, it is constant by constant current
Direct current supplies LED filament lamps, and the efficiency conversion of the driving power of booster circuit is high, and output voltage stabilization, hence in so that
It is not in stroboscopic phenomenon that LED high-voltage filaments are luminous.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should
It is defined by scope of the claims.
Claims (1)
1. a kind of high power factor is without stroboscopic light adjusting circuit, it is characterised in that：The ac input end of AC power and rectification circuit
Connection, the cathode output end of the rectification circuit are connected to transformer secondary winding L2 one end, vice-side winding by inductance L1
The L2 other end is connected to the positive pole of output LED module by diode D1；The cathode output end ground connection of the rectification circuit；
The both ends of the inductance L1 are in parallel with resistance R1, and resistance R1 one end is grounded by electric capacity C1, and the other end is connected to
Electric capacity C2 one end, the electric capacity C2 other end are connected to a common port of parallel resistance R2A, R2B, parallel resistance R2A, R2B
Another common end grounding；The inductance L1 is grounded with one end that vice-side winding L2 is connected by electric capacity C3；
The vice-side winding L2 is additionally coupled to boost control chip IC1 DRAIN stitch with one end that diode D1 anodes are connected；
The negative electrode of the diode D1 is connected to boost control chip IC1 VCC pin, the VCC pin by series resistance R3, R4
It is grounded by electric capacity C4；
The FB pins of the boost control chip IC1 are connected to the positive pole of output LED module by series resistance R6, R7；It is described
Connected between the FB pins and GND pin of control chip by electric capacity C5, electric capacity C5 both ends are in parallel with resistance R5；The boosting
Control chip IC1 CS pins are connected to GND pin by resistance Rs1, and the CS pins of the boost control chip IC1 pass through electricity
Hinder Rs2 ground connection；
The negative electrode of the diode D1 is additionally coupled to be electrolysed C5 positive pole, is electrolysed C5 negative pole ground connection；The both ends of the electrolysis C5
It is in parallel with resistance R9；The negative pole of the output LED module is connected to the output end of linear constant current chip IC 2；Linear constant current chip
IC2 CS ends are grounded by resistance R8；
The vice-side winding L2 is in charging process, and civil power is simultaneously to the power supply of output LED module and electrolysis C5 chargings；The secondary
When winding charging reaches boost control chip IC1 setting value, boost control chip IC1 control vice-side winding L2 electric discharges；L2 exists
The electric current and civil power that L2 is released in discharge process are powered to the LED module together, and the electrolysis C5 is charged；The electrolysis
The voltages keep constant at C5 both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721031849.0U CN207124788U (en) | 2017-08-17 | 2017-08-17 | A kind of high power factor is without stroboscopic light adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721031849.0U CN207124788U (en) | 2017-08-17 | 2017-08-17 | A kind of high power factor is without stroboscopic light adjusting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207124788U true CN207124788U (en) | 2018-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721031849.0U Active CN207124788U (en) | 2017-08-17 | 2017-08-17 | A kind of high power factor is without stroboscopic light adjusting circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021073550A1 (en) * | 2019-10-18 | 2021-04-22 | 深圳市国盈光电有限公司 | High-voltage, high-power-factor non-flicker light strip |
-
2017
- 2017-08-17 CN CN201721031849.0U patent/CN207124788U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021073550A1 (en) * | 2019-10-18 | 2021-04-22 | 深圳市国盈光电有限公司 | High-voltage, high-power-factor non-flicker light strip |
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