CN104168693A - LED filtering voltage stabilizing circuit - Google Patents
LED filtering voltage stabilizing circuit Download PDFInfo
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- CN104168693A CN104168693A CN201410313787.7A CN201410313787A CN104168693A CN 104168693 A CN104168693 A CN 104168693A CN 201410313787 A CN201410313787 A CN 201410313787A CN 104168693 A CN104168693 A CN 104168693A
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Abstract
The invention discloses an LED filtering voltage stabilizing circuit, consisting of a filtering circuit, a transformation circuit connected to the output terminal of the filtering circuit, a voltage stabilization circuit connected to the output terminal of the transformation circuit, and an output circuit connected to the output terminal of the voltage stabilization circuit, wherein a three-terminal voltage stabilizer is used in the voltage stabilization circuit. The invention can output constant voltage when the electric power grid voltage or the load changes, can protect the LED and the circuit, and can prolong the service life.
Description
Technical field
The present invention relates to a kind of LED circuit, specifically refer to a kind of LED filter regulator circuit.
Background technology
LED be called as the 4th generation lighting source or green light source, there is the features such as energy-saving and environmental protection, the life-span is long, volume is little, be widely used in the fields such as various indications, demonstration, decoration, backlight, general lighting and urban landscape.Yet LED lamp also has certain voltage range, as overtension or the too low LED lamp that all can allow, cannot normally work, even affect its useful life.
People's life is now perfect all the more, concerned power is also more nervous, many times can too much whole voltage be forced down because of equipment, or while there is fluctuation in line voltage, existing LED circuit cannot allow output voltage keep stable, thereby affect the normal use of LED lamp, in this case just in the urgent need to a kind of LED circuit that can stable output voltage.
Summary of the invention
When the object of the invention is to overcome line voltage fluctuation occurring, the spread of voltage of existing LED circuit output, thus have influence on the defect that LED is used, a kind of LED filter regulator circuit that can stable output voltage has been proposed.
Object of the present invention is achieved through the following technical solutions: a kind of LED filter regulator circuit, mainly by filter circuit, the transforming circuit being connected with this filter circuit output, the voltage stabilizing circuit being connected with this transforming circuit output, and the output circuit being connected with this circuit output end of pressure-stabilizing forms, it is characterized in that, described voltage stabilizing circuit is by three terminal regulator U, base stage is connected with the IN end of this three terminal regulator U, emitter is connected with the OUT end of three terminal regulator U, the transistor VT4 that collector electrode is connected with the output of transforming circuit, one end is connected with the collector electrode of transistor VT4, the resistance R 4 that the other end is connected with the IN end of three terminal regulator U after capacitor C 7 through capacitor C 6, be serially connected in the diode D5 between the tie point of resistance R 4 and capacitor C 6 and the OUT of three terminal regulator U end, one end is connected with the OUT end of three terminal regulator U, the capacitor C 8 that the other end is connected with output circuit, and be serially connected with the collector electrode of transistor VT4 and the diode D4 between emitter and form.
Described filter circuit comprises: transistor VT1, transistor VT2, transistor VT3, the P utmost point is connected with the base stage of transistor VT2, the N utmost point is connected, controls with the base stage of transistor VT1 the unidirectional thyristor D1 that the utmost point is connected with one end of capacitor C 1 and capacitor C 2 respectively after inductance L 1, be serially connected in base stage and the resistance R between collector electrode 1 of transistor VT2, and the base stage and 2 compositions of the resistance R between collector electrode that are serially connected in transistor VT1; The other end of described capacitor C 1 is connected with the collector electrode of transistor VT2, and the other end of capacitor C 2 is connected with the collector electrode of transistor VT1; The base stage of transistor VT3 is connected with the base stage of transistor VT1, the grounded emitter of transistor VT3; The collector electrode of the emitter of the emitter of transistor VT1, transistor VT2 and transistor VT3 is connected with the input of transforming circuit respectively.
Described transforming circuit is by transformer T1, and the former limit circuit and the secondary circuit composition that is arranged on the secondary of transformer T1 that are arranged on the former limit of transformer T1.
The former limit circuit of described transformer T1 is connected with the emitter of transistor VT2 by one end, the capacitor C 3 that the other end is connected with the Same Name of Ends of the inductance coil L3 on the former limit of transformer T1, the P utmost point is connected with the base stage of transistor VT2, the diode D2 that the N utmost point is connected with the non-same polarity of inductance coil L3, one end is connected with the N utmost point of unidirectional thyristor D1, the capacitor C 4 that the other end is connected with the non-same polarity of the inductance coil L4 on the former limit of transformer T1, and one end is connected with the non-same polarity of inductance coil L4, the inductance L 2 that the other end is connected with the emitter of transistor VT1 forms, the Same Name of Ends of described inductance coil L4 is connected with the non-same polarity of inductance coil L3, and the collector electrode of transistor VT3 is also connected with the non-same polarity of inductance coil L4.
The capacitor C 5 that the secondary circuit of described transformer T1 is in parallel by the inductance coil L5 with transformer T1 secondary, the unidirectional thyristor D3 and the resistance R 3 that are in parallel with capacitor C 5 form; The non-same polarity of described inductance coil L5 is connected with the collector electrode of transistor VT4, and the Same Name of Ends of inductance coil L5 is connected with the tie point of capacitor C 7 with capacitor C 6.
Described output circuit is comprised of inductance L 6, thyristor D6 and resistance R 5, described inductance L 6 one end are connected with the emitter of transistor VT4, the other end is connected with the tie point of capacitor C 7 with capacitor C 8, and thyristor D6 is in parallel with inductance L 6 again after connecting with resistance R 5.
Described three terminal regulator U is WC7805 type pressurizer.
The present invention compares compared with prior art, has the following advantages and beneficial effect:
(1) the present invention makes simply, and stability is high.
(2) the present invention compares with traditional LED circuit, can be when voltage ripple of power network or still can export constant voltage during load variations, guarantee that LED normally works, and extend LED useful life.
(3) the present invention can burning voltage when fluctuation occurs line voltage, and its circuit itself is also had to protective effect, extends circuit useful life.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, LED filter regulator circuit of the present invention is mainly by filter circuit, the transforming circuit being connected with this filter circuit output, the voltage stabilizing circuit being connected with this transforming circuit output, and the output circuit being connected with this circuit output end of pressure-stabilizing forms, it is characterized in that, described voltage stabilizing circuit is by three terminal regulator U, base stage is connected with the IN end of this three terminal regulator U, emitter is connected with the OUT end of three terminal regulator U, the transistor VT4 that collector electrode is connected with the output of transforming circuit, one end is connected with the collector electrode of transistor VT4, the resistance R 4 that the other end is connected with the IN end of three terminal regulator U after capacitor C 7 through capacitor C 6, be serially connected in the diode D5 between the tie point of resistance R 4 and capacitor C 6 and the OUT of three terminal regulator U end, one end is connected with the OUT end of three terminal regulator U, the capacitor C 8 that the other end is connected with output circuit, and be serially connected with the collector electrode of transistor VT4 and the diode D4 between emitter and form.Poor because of the direct voltage voltage stabilizing of filter circuit, transforming circuit output, the voltage of exporting when voltage ripple of power network or during load variations also changes thereupon, and with after voltage stabilizing circuit, output voltage is more stable.
Described filter circuit comprises: transistor VT1, transistor VT2, transistor VT3, capacitor C 1, capacitor C 2, resistance R 1, inductance L 1, unidirectional thyristor D1, resistance R 2.The P utmost point of described unidirectional thyristor D1 is connected with the base stage of transistor VT2, the N utmost point is connected with the base stage of transistor VT1, controlling the utmost point is connected with the collector electrode of transistor VT2 after capacitor C 1 through inductance L 1, the collector electrode of transistor VT1 is connected with the tie point of inductance L 1 with capacitor C 1 after capacitor C 2, the emitter of transistor VT1 is connected with transforming circuit, the base stage of transistor VT3 is connected with the base stage of transistor VT1, its grounded emitter, collector electrode is connected with transforming circuit, resistance R 1 is serially connected with between transistor VT2 collector electrode and base stage, resistance R 2 is serially connected with between the collector electrode and base stage of transistor VT1, described capacitor C 1 and the other end of capacitor C 2 form the power input of the present embodiment.Filter circuit carries out filtering by the pulsating voltage of input, and most alternating current component is filtered, and allows voltage become level and smooth direct voltage.
Described transforming circuit is by transformer T1, and the former limit circuit and the secondary circuit composition that is arranged on the secondary of transformer T1 that are arranged on the former limit of transformer T1.
The former limit circuit of described transformer T1 comprises: capacitor C 3, diode D2, capacitor C 4, inductance L 2, one end of described capacitor C 3 is connected with the emitter of transistor VT2, the other end is connected with the Same Name of Ends of the former limit inductance coil L3 of transformer, the P utmost point of diode D2 is connected with the base stage of transistor VT2, the N utmost point is connected with the non-same polarity of the former limit inductance coil L3 of transformer T1, one end of capacitor C 4 is connected with the N utmost point of unidirectional thyristor D1, the other end is connected with the collector electrode of transistor VT3, capacitor C 4 is also connected with the non-same polarity of the former limit inductance coil L4 of transformer T1 simultaneously, one end of inductance L 2 is connected with the tie point of the collector electrode of transistor VT3 with capacitor C 4, the other end is connected with the emitter of transistor VT1, the non-same polarity of described inductance coil L3 is connected with the Same Name of Ends of inductance coil L4.
The capacitor C 5 that the secondary circuit of described transformer T1 is in parallel by the secondary inductance coil L5 with transformer T1, and the unidirectional thyristor D3 in parallel with capacitor C 5 and resistance R 3 form respectively, the control utmost point ground connection of unidirectional thyristor D3, the non-same polarity of the secondary inductance coil L5 of described transformer T1 is connected with the collector electrode of transistor VT4, the Same Name of Ends of inductance coil L5 is connected with the tie point of capacitor C 7 with capacitor C 6.
Described output circuit comprises: inductance L 6, thyristor D6, resistance R 5, described inductance L 6 one end are connected with the emitter of transistor VT4, the other end is connected with capacitor C 8, thyristor D6 is in parallel with inductance L 6 again after connecting with resistance R 5, and the N utmost point of thyristor D6 and the other end of resistance R 5 have formed the output of the present embodiment.
Described three terminal regulator U selects WC7805 pressurizer, and WC7805 pressurizer has overvoltage, overcurrent protection, uses reliable, convenient and low price.
During work voltage after filtering circuit most alternating current component is filtered, allow voltage become level and smooth direct voltage, pass through again transforming circuit, voltage transformation is become to required voltage swing, can be becoming constant direct voltage from the fluctuation direct voltage of transforming circuit output, finally by crossing output circuit output during through voltage stabilizing circuit.
As mentioned above, just can well implement the present invention.
Claims (5)
1. a LED filter regulator circuit, mainly by filter circuit, the transforming circuit being connected with this filter circuit output, the voltage stabilizing circuit being connected with this transforming circuit output, and the output circuit being connected with this circuit output end of pressure-stabilizing forms, it is characterized in that, described voltage stabilizing circuit is by three terminal regulator U, base stage is connected with the IN end of this three terminal regulator U, emitter is connected with the OUT end of three terminal regulator U, the transistor VT4 that collector electrode is connected with the output of transforming circuit, one end is connected with the collector electrode of transistor VT4, the resistance R 4 that the other end is connected with the IN end of three terminal regulator U after capacitor C 7 through capacitor C 6, be serially connected in the diode D5 between the tie point of resistance R 4 and capacitor C 6 and the OUT of three terminal regulator U end, one end is connected with the OUT end of three terminal regulator U, the capacitor C 8 that the other end is connected with output circuit, and be serially connected with the collector electrode of transistor VT4 and the diode D4 between emitter and form.
2. a kind of LED filter regulator circuit according to claim 1, it is characterized in that, described filter circuit comprises: transistor VT1, transistor VT2, transistor VT3, the P utmost point is connected with the base stage of transistor VT2, the N utmost point is connected with the base stage of transistor VT1, control the unidirectional thyristor D1 that the utmost point is connected with one end of capacitor C 1 and capacitor C 2 respectively after inductance L 1, be serially connected in base stage and the resistance R between collector electrode 1 of transistor VT2, and the base stage and the resistance R between collector electrode 2 that are serially connected in transistor VT1 form, the other end of described capacitor C 1 is connected with the collector electrode of transistor VT2, and the other end of capacitor C 2 is connected with the collector electrode of transistor VT1, the base stage of transistor VT3 is connected with the base stage of transistor VT1, the grounded emitter of transistor VT3, the collector electrode of the emitter of the emitter of transistor VT1, transistor VT2 and transistor VT3 is connected with the input of transforming circuit respectively.
3. a kind of LED filter regulator circuit according to claim 2, is characterized in that, described transforming circuit is by transformer T1, and the former limit circuit and the secondary circuit composition that is arranged on the secondary of transformer T1 that are arranged on the former limit of transformer T1;
The former limit circuit of described transformer T1 is connected with the emitter of transistor VT2 by one end, the capacitor C 3 that the other end is connected with the Same Name of Ends of the inductance coil L3 on the former limit of transformer T1, the P utmost point is connected with the base stage of transistor VT2, the diode D2 that the N utmost point is connected with the non-same polarity of inductance coil L3, one end is connected with the N utmost point of unidirectional thyristor D1, the capacitor C 4 that the other end is connected with the non-same polarity of the inductance coil L4 on the former limit of transformer T1, and one end is connected with the non-same polarity of inductance coil L4, the inductance L 2 that the other end is connected with the emitter of transistor VT1 forms, the Same Name of Ends of described inductance coil L4 is connected with the non-same polarity of inductance coil L3, and the collector electrode of transistor VT3 is also connected with the non-same polarity of inductance coil L4,
The capacitor C 5 that the secondary circuit of described transformer T1 is in parallel by the inductance coil L5 with transformer T1 secondary, the unidirectional thyristor D3 and the resistance R 3 that are in parallel with capacitor C 5 form; The non-same polarity of described inductance coil L5 is connected with the collector electrode of transistor VT4, and the Same Name of Ends of inductance coil L5 is connected with the tie point of capacitor C 7 with capacitor C 6.
4. a kind of LED filter regulator circuit according to claim 3, it is characterized in that, described output circuit is comprised of inductance L 6, thyristor D6 and resistance R 5, described inductance L 6 one end are connected with the emitter of transistor VT4, the other end is connected with the tie point of capacitor C 7 with capacitor C 8, and thyristor D6 is in parallel with inductance L 6 again after connecting with resistance R 5.
5. according to a kind of LED filter regulator circuit described in claim 1～4 any one, it is characterized in that, described three terminal regulator U is WC7805 type pressurizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410313787.7A CN104168693B (en) | 2014-07-03 | 2014-07-03 | A kind of LED filter regulator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410313787.7A CN104168693B (en) | 2014-07-03 | 2014-07-03 | A kind of LED filter regulator circuit |
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| Publication Number | Publication Date |
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| CN104168693A true CN104168693A (en) | 2014-11-26 |
| CN104168693B CN104168693B (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410313787.7A Expired - Fee Related CN104168693B (en) | 2014-07-03 | 2014-07-03 | A kind of LED filter regulator circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217473A (en) * | 2018-10-09 | 2019-01-15 | 六安腾达信息科技有限公司 | Power information system with circuit protection function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030020418A1 (en) * | 2001-07-24 | 2003-01-30 | Chao-Cheng Lu | Ultra-high voltage impulse generator |
| CN103427674A (en) * | 2012-05-22 | 2013-12-04 | 成都酷玩网络科技有限公司 | 5V stabilized voltage supply with protecting function |
| CN103457476A (en) * | 2013-09-11 | 2013-12-18 | 昆山新金福精密电子有限公司 | Self-excitation transformation-based voltage stabilizing circuit |
-
2014
- 2014-07-03 CN CN201410313787.7A patent/CN104168693B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030020418A1 (en) * | 2001-07-24 | 2003-01-30 | Chao-Cheng Lu | Ultra-high voltage impulse generator |
| CN103427674A (en) * | 2012-05-22 | 2013-12-04 | 成都酷玩网络科技有限公司 | 5V stabilized voltage supply with protecting function |
| CN103457476A (en) * | 2013-09-11 | 2013-12-18 | 昆山新金福精密电子有限公司 | Self-excitation transformation-based voltage stabilizing circuit |
Non-Patent Citations (1)
| Title |
|---|
| 杨邦文: "具有过压保护的5V稳压电源", 《电气时代》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109217473A (en) * | 2018-10-09 | 2019-01-15 | 六安腾达信息科技有限公司 | Power information system with circuit protection function |
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| CN104168693B (en) | 2016-07-20 |
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