CN202488857U - Soft start light - Google Patents
Soft start light Download PDFInfo
- Publication number
- CN202488857U CN202488857U CN2012200682581U CN201220068258U CN202488857U CN 202488857 U CN202488857 U CN 202488857U CN 2012200682581 U CN2012200682581 U CN 2012200682581U CN 201220068258 U CN201220068258 U CN 201220068258U CN 202488857 U CN202488857 U CN 202488857U
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- Prior art keywords
- circuit
- control chip
- soft start
- electromagnetic interference
- chip
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Abstract
The utility model discloses a soft start light, comprising a control chip, an electromagnetic interference circuit, a rectifier circuit, a filter circuit, an undervoltage protection circuit, an oscillating and preheating circuit, a charge pump circuit and a tube circuit. The electromagnetic interference circuit, the rectifier circuit and the filter circuit are connected in series and in sequence; the output terminal of the filter circuit is connected with the input terminal of the control chip; and the output terminal of the control chip is respectively connected with the input terminals of the undervoltage protection circuit, the oscillating and preheating circuit, the charge pump circuit and the tube circuit. As the control chip is added on a line to control the circuits, a half-bridge drive chip is adopted by the rectifier circuit, and a soft start module, a variable-frequency oscillator module, an undervoltage protection module and the like are integrated in the half-bridge drive chip, the soft start light can achieve the green and environment-friendly aims of multiple switch on and off and prolonging the service life of tubes.
Description
Technical field
The utility model relates to a kind of light fixture, particularly relates to a kind of soft start lamp.
Background technology
No matter be commercial lighting or lighting of home, a large amount of on the market use electricity-saving lamps all is the early simulation switching circuit, and the switch number of times has only 6000-8000 time; Life-span is short; Analog switching circuit exists discrete component to distribute, negative factors such as the temperature instability of magnet ring, and the electric ballast that makes this discrete device constitute is short useful life; And its operational environment is limited by the strictness of high temperature, low temperature, electromagnetic interference etc.; When the voltage of outer net was lower than AC198V in addition, the pipe of fluorescent tube was pressed rapidly and is risen, and will soon burn out the device on the wiring board.
The utility model content
The purpose of the utility model be to provide a kind of switch often, soft start lamp that lamp tube service life is long.
For realizing above-mentioned purpose, the technical solution of the utility model is:
The utility model is a kind of soft start lamp, and it comprises control chip, electromagnetic interference circuit, rectification circuit, filter circuit, under-voltage protecting circuit, vibration and preheat circuit, charge pump circuit, tube circuit; Described electromagnetic interference circuit, rectification circuit, filter circuit are serially connected successively; The output of filter circuit is connected the input of control chip, and the output of control chip connects the input of under-voltage protecting circuit, vibration and preheat circuit, charge pump circuit, tube circuit respectively.
Described control chip is the IMP3521 chip.
After adopting such scheme, the utility model mainly is made up of control chip, adjustable warm-up time, adjustable operating frequency, under-voltage protection, soft start function.Because the utility model increases control chip on the line circuit is controlled; Rectification circuit adopts the half-bridge driven chip; This half-bridge driven chip internal is integrated soft start; Variable oscillator, modules such as under-voltage protection, thereby reach switch often, the environmental protection purpose of prolonging lamp tube service life.The switch number of times of the utility model can reach ten thousand life-spans of 5-10, is 5-10 times of analog switching circuit life-span, and operational environment does not receive the influence of high temperature, low temperature, electromagnetic interference etc.; And the electric ballast of long service life, this ballast major control circuit is compared with the electric ballast that discrete device constitutes, and it is not to lean on magnet ring and triode self-excitation mode to vibrate; But therefore the inner integrated vibration of main control chip receives Influence of Temperature very little, can avoid because the abnormal work state that the temperature difference causes; Improve functional reliability greatly, and then promoted the useful life of this electric ballast itself, the preheat function of this ballast governor circuit can reduce the starting voltage of fluorescent tube greatly; And then the switch number of times that improves fluorescent tube reaches prolonging lamp tube service life; Particularly the place effect of frequent switch especially manifests, and cost is low, and it is little to take up room; In addition: the peripheral components of this ballast major control circuit is few; Simple in structure, be particularly suitable for the strict application scenario of space requirement, the voltage of outer net can both operate as normal when AC170V in addition.
Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model;
Fig. 2 is the circuit theory diagrams of the utility model.
Embodiment
Like Fig. 1, shown in Figure 2, the utility model is a kind of soft start lamp, and it comprises control chip 1, electromagnetic interference circuit 2, rectification circuit 3, filter circuit 4, under-voltage protecting circuit 5, vibration and preheat circuit 6, charge pump circuit 7, tube circuit 8.
Described electromagnetic interference circuit 2, rectification circuit 3, filter circuit 4 are serially connected successively; The output of filter circuit 4 is connected the input of control chip, and the output of control chip connects the input of under-voltage protecting circuit 5, vibration and preheat circuit 6, charge pump circuit 7, tube circuit 8 respectively.
Described control chip 1 is the IMP3521 chip.
The operation principle of the utility model:
The 220V-240V AC power is through the L1 of electromagnetic interference circuit 2, the EMI circuit that C8 forms; Anti-this extraneous next electromagnetic interference; Through forming rectification circuit 3 by D1 D2 D3 D4, the C1 filtering through filter circuit 4 changes the 220V alternating current into direct current (VDC); Get into 5 pin of control chip 1 (U1) through the R1 of over under-voltage protection circuit 5 R2 D5 C2; The inner under-voltage protecting circuit of U1 is supplied power with the inner high-pressure side MOSFET source electrode of U1 then, and another road gets into the inner high-pressure side MOSFET grid power supply of control chip 1 (U1), and control chip 1 inside has encapsulated two MOSFET (metal oxide layer semiconductor pipe) and constituted the typical half bridge driving; Control chip 1 (U1) begins to get into vibration; The D6 D7 C5 pump circuit of charge pump circuit 7 is formed, and vibration is followed warm-up time with the R2 C3 composition frequency of oscillation of preheat circuit 6, mainly cooperates control chip 1 (U1) frequency of oscillation with reaching the influence that does not receive high temperature warm-up time; Can avoid because the abnormal work state that the temperature difference causes; Improve functional reliability greatly, and then promoted the useful life of the utility model itself, output reaches lighting of fluorescent tube through C6 L3 C7 through control chip 1 (U1) 2 pin.
Owing to the utlity model has under-voltage protecting circuit 5; When the voltage of outer net is lower than AC170V; Control chip 1 gets into under-voltage locking (UVLO) pattern, the UVLO pattern be designed to keep a very low electric current (＜200UA) made before control chip 1 inner high-end and low side output driver is activated to guarantee the repertoire of control chip 1.Be low VCO pin in the UVLO high-end and output low side output driver of control chip 1 in control chip 1 inside therebetween and be pulled down to ground, the initial frequency that resets is to maximum.In case reaching, VCC starts 1 unlatching of thresholding control chip; The half-bridge FET starting oscillation of control chip 1 inside, control chip 1 gets into frequency flyback pattern, and VCO is that the 0V frequency is very high when starting; Be approximately 2.5 times of fmin so, the flicker of voltage glitch and lamp is minimized.Frequency is landed to high Q output stage resonance frequency, causes that modulating voltage and lamp current increase, and filament is preheating to emission temperature during this period, guarantees the long-life of lamp.Frequency continuation reduction is triggered up to lamp and lights, and control chip 1 gets into operational mode.
The emphasis of the utility model just is: control chip 1 is with control circuit.
The above; Be merely the utility model preferred embodiment; The type of control chip can have multiple; So can not limit the scope that the utility model is implemented with this, the equivalence of promptly doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model patent contains.
Claims (2)
1. soft start lamp, it is characterized in that: it comprises control chip, electromagnetic interference circuit, rectification circuit, filter circuit, under-voltage protecting circuit, vibration and preheat circuit, charge pump circuit, tube circuit; Described electromagnetic interference circuit, rectification circuit, filter circuit are serially connected successively; The output of filter circuit is connected the input of control chip, and the output of control chip connects the input of under-voltage protecting circuit, vibration and preheat circuit, charge pump circuit, tube circuit respectively.
2. soft start lamp according to claim 1 is characterized in that: described control chip is the IMP3521 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200682581U CN202488857U (en) | 2012-02-28 | 2012-02-28 | Soft start light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200682581U CN202488857U (en) | 2012-02-28 | 2012-02-28 | Soft start light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202488857U true CN202488857U (en) | 2012-10-10 |
Family
ID=46963239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200682581U Expired - Fee Related CN202488857U (en) | 2012-02-28 | 2012-02-28 | Soft start light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202488857U (en) |
-
2012
- 2012-02-28 CN CN2012200682581U patent/CN202488857U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20150228 |
|
| EXPY | Termination of patent right or utility model |