CN201571223U - High-power LED streetlight automatic control driving power supply - Google Patents
High-power LED streetlight automatic control driving power supply Download PDFInfo
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- CN201571223U CN201571223U CN200920276961XU CN200920276961U CN201571223U CN 201571223 U CN201571223 U CN 201571223U CN 200920276961X U CN200920276961X U CN 200920276961XU CN 200920276961 U CN200920276961 U CN 200920276961U CN 201571223 U CN201571223 U CN 201571223U
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Abstract
The utility model discloses a high-power LED streetlight automatic control driving power supply which has wide adaptable voltage, stable current and high efficiency and can realize overcurrent protection. The driving power supply is provided with a forward diode D09, wherein the negative end of the forward diode D09 is connected with a capacitor E10, resistors R11and R27 and the emitter of a triode Q07; one path of the other end of the resistor R11 is connected with the collector of the triode Q07 through a capacitor C23 and a resistor R29, and another path is connected with the base of a triode Q08 and a resistor R33; the other end of the resistor R27 is connected with the base of the triode Q07; the collector of the triode Q08 is connected with the base of the triode Q07; the emitter of the triode Q08 is grounded through a resistor R35; the collector of the triode Q07 is connected with a reversed diode D24 and an inductance coil L02; and the inductance coil L02 is connected with the power supply output end Vout through a resistor R40 and capacitors E11 and C04, which are connected in parallel.
Description
Technical field:
The utility model relates to a kind of LED streetlamp driving power supply, especially a kind ofly adapts to that voltage is wide, current stabilization, efficient height, can realize the high-power LED street lamp auto-control driving power of overcurrent protection.
Background technology:
The LED street lighting is the lighting device for the third time after naked light and incandescent lamp.At present, mainly contain boost type and buck two classes for the high-power LED street lamp drive circuit.Boost type circuit efficiency height (input voltage and LED light voltage (VF) high more near efficient more) and electric current are relatively stable, but, when the short circuit simultaneously of several LEDs is arranged in the load, then be lower than input voltage and then cause overcurrent because of lighting voltage (VF), damage for fear of remaining LED, can only quit work, influence the normal illumination of street lamp.Buck circuit is to be the version of representative with LM3404HV, what adopted is the accurate constant current of pulse current sampling type, the shortcoming of this structure also changes for pulse width when input voltage changes, cause output current to change, when the LED load is raise by temperature to make to light voltage (VF) value step-down, cause output current to become big equally, influence the life-span of LED.
Summary of the invention:
The utility model is in order to solve the above-mentioned technical problem of existing in prior technology, provides a kind of and adapts to that voltage is wide, current stabilization, efficient height, can realize the high-power LED street lamp auto-control driving power of overcurrent protection.
Technical solution of the present invention is: a kind of high-power LED street lamp auto-control driving power, be provided with forward diode D09, the negative terminal of forward diode D09 and electric capacity E10, resistance R 11, the emitter of R27 and triode Q07 joins, the other end of resistance R 11 is leaded up to capacitor C 23, the collector electrode of resistance R 29 and triode Q07 joins, the base stage of another road and triode Q08 and resistance R 33 are joined, the base stage of the other end of resistance R 27 and triode Q07 is joined, the base stage of the collector electrode of triode Q08 and triode Q07 is joined, and the emitter of triode Q08 is by resistance R 35 ground connection; Be connected to backward diode D24 and inductance coil L02 with the collector electrode of triode Q07, inductance coil L02 joins by resistance R 40, electric capacity E11, C04 and the power output end Vout that is in parallel.
With described resistance R 40 resistance R 39 that has been in parallel, the end of the resistance R that is in parallel 40, R39 and the emitter of triode Q19 join, the base stage of triode Q19 is joined by the other end of resistance R 50 be in parallel resistance R 40, R39, the collector electrode of triode Q19 joins by resistance R 44 and the base stage of triode Q09, the base stage of triode Q09 is joined by the emitter of resistance R 31 with triode Q09, and the base stage of the collector electrode of triode Q09 and triode Q08 is joined.
Be connected to resistance R 41 and forward voltage-stabiliser tube Z1 with the contact of described resistance R 44 and triode Q09 base stage, the contact of the negative terminal of voltage-stabiliser tube Z1 and resistance R 43, R42 joins, and the other end of resistance R 43 and power output end Vout join.
The utility model is the constant-current circuit structure of DC-DC, institute's feedack is a DC information, has current stabilization, efficient height, adapts to advantages such as voltage is wide, also can not cause over-current phenomenon avoidance when in the load plurality of LEDs short circuit being arranged simultaneously, improve the reliability of LED street lamp, prolonged useful life.
Description of drawings:
Fig. 1 is the circuit theory diagrams of the utility model embodiment.
Embodiment:
Below in conjunction with description of drawings embodiment of the present utility model.As shown in Figure 1: be provided with and import the forward diode D09 that power supply Vin joins, the emitter of the electric capacity E10 of the negative terminal of forward diode D09 and an end ground connection, resistance R 11, R27 and triode Q07 joins, the other end of resistance R 11 is leaded up to the collector electrode of capacitor C 23, resistance R 29 and triode Q07 and is joined, the base stage of another road and triode Q08 and resistance R 33 are joined, the base stage of the other end of resistance R 27 and triode Q07 is joined, the base stage of the collector electrode of triode Q08 and triode Q07 is joined, and the emitter of triode Q08 is by resistance R 35 ground connection; Be connected to backward diode D24 and inductance coil L02 with the collector electrode of triode Q07, inductance coil L02 joins by resistance R 40, electric capacity E11, C04 and the power output end Vout that is in parallel, the other end ground connection of backward diode D24, electric capacity E11, C04.
Described resistance R 40 resistance R 39 that has been in parallel, the end of the resistance R that is in parallel 40, R39 and the emitter of triode Q19 join, the base stage of triode Q19 is joined by the other end of resistance R 50 be in parallel resistance R 40, R39, the collector electrode of triode Q19 joins by resistance R 44 and the base stage of triode Q09, the base stage of triode Q09 is joined by the emitter of resistance R 31 with triode Q09, and the base stage of the collector electrode of triode Q09 and triode Q08 is joined.
Be connected to resistance R 41 and forward voltage-stabiliser tube Z1 with the contact of described resistance R 44 and triode Q09 base stage, the contact of the negative terminal of voltage-stabiliser tube Z1 and resistance R 43, R42 joins, the other end of resistance R 43 and power output end Vout join, the other end ground connection of resistance R 41, R42.
Operation principle:
Output end vo ut of the present utility model and load are joined.
When circuit just powers on, triode Q07 is in cut-off state, the collector terminal of triode Q07 is a low level, electric current is given the power supply of Q08 base stage by the dividing point of resistance R 11, R33, but because the existence of capacitor C 23, electric current is by 29 pairs of capacitor C of dividing point, capacitor C 23, resistance R, 23 chargings of resistance R 11 and R33, and resistance R 33 is in low level, and triode Q08 ends; (this moment, capacitor C 23 connecting resistance R11 were for just along with the charging process of capacitor C 23 is finished, connecting resistance R29 end is for negative), the current potential of resistance R 33 is also along with rising, when being raised to the conduction threshold of triode Q08, triode Q08 transfers the conducting magnifying state to by cut-off state, and provide base current for triode Q07, triode Q07 also transfers the conducting magnifying state to by cut-off state, electric current begins by triode Q07, inductance coil L02 to power supplies such as electric capacity E11, C04 and loads, and electric pole coil L02 electric current by the time also begin energy storage.On the other hand, because the conducting of triode Q07, collector terminal transfers high level to by low level, capacitor C 23 changes discharge condition into by charged state, resistance R 29, capacitor C 23, resistance R 33 constitute discharge loop, in discharge, also deepened the conducting of triode Q08, thereby impelled triode Q07 to transfer the saturation conduction state to, at this moment also reached maximum (L02 energy storage maximum) by inductance coil L02 supply current.Along with the discharge of capacitor C 23 is finished, then develop into the reverse charging state and (at this moment capacitor C 23 connecting resistance R33 end is for negative along with the reverse charging of capacitor C 23 is finished, connecting resistance R29 is for just), the current potential of resistance R 33 is also along with decline, triode Q08 withdraws from conducting state, transfer cut-off state to, triode Q07 also and then transfers cut-off state to.Triode Q07 ends, inductance coil L02 is produced release the contrary electromotive force of energy, this contrary electromotive force (meet diode D24 for negative, connecting resistance R40 for just) constitutes the loop by resistance R 40, electric capacity E11, C04 and resistance R 43, R42, load, D24, continues to give electric capacity E11, load for the benefit electric energy.Simultaneously, end and the releasing of inductance coil L02 of triode Q07 can make the collector electrode of triode Q07 be in low level, capacitor C 23 is transferred to the back discharge state and then is developed into charged state by original reverse charging state by resistance R 29, R11, during this transfer, capacitor C 23 is being clamped down on the base potential of triode Q08, makes that triode Q08 is more reliable to be ended.Along with the charging process of capacitor C 23 is finished, the current potential of resistance R 33 is also along with rising, when being raised to the conduction threshold of triode Q08, triode Q08 transfers magnifying state to by cut-off state once more ... circuit produces loop vibration like this, powers to the load with the form of DC-DC.
Over-current detection resistance is made of the resistance R 39 that is in parallel with resistance R 40, when short circuit appears in load, during power circuit generation overcurrent, the pressure drop that detects resistance R 39 reaches the Q19 conduction threshold, make triode Q09 conducting by resistance R 44, capacitor C 23 discharges are being forced in the conducting of triode Q09 on the one hand, force triode Q08 and triode Q07 to end on the other hand, end to power to the load.Inductance coil L02 after triode Q07 ends, release can, as release can be enough big, can continue to control triode Q07 by resistance R 44, triode Q09 and end.After inductance coil L02 released energy, triode Q09 recovered cut-off state, and capacitor C 23 is recovered to start working from the initial condition charging once more.And then develop into triode Q07 conducting once more, triode Q19 conducting, three machine-operated Q09 conductings, triode Q07 and end ... as long as the existence of overcurrent, circuit vibration always like this goes down.Both when circuit generation overcurrent, also still worked in oscillatory regime, but the time of triode Q07 conducting is very of short duration, to reach the effect of protection.
The voltage stabilizing part detects electric capacity E11 and load voltage by the dividing point of resistance R 43, R42, when this dividing point voltage reaches the Vbe series voltage of voltage-stabiliser tube Z1, triode Q09, triode Q09 conducting forces triode Q08 and triode Q07 to end equally, ends to power to the load.Descend until electric capacity E11, load voltage, make this detect dividing point voltage and drop to and be lower than voltage-stabiliser tube Z1, the triode Q09 conducting voltage of connect, triode Q09 ends, circuit just once more recovery enter oscillatory regime.
Claims (3)
1. high-power LED street lamp auto-control driving power, it is characterized in that: be provided with forward diode D09, the emitter of the negative terminal of forward diode D09 and electric capacity E10, resistance R 11, R27 and triode Q07 joins, the other end of resistance R 11 is leaded up to the collector electrode of capacitor C 23, resistance R 29 and triode Q07 and is joined, the base stage of another road and triode Q08 and resistance R 33 are joined, the base stage of the other end of resistance R 27 and triode Q07 is joined, the base stage of the collector electrode of triode Q08 and triode Q07 is joined, and the emitter of triode Q08 is by resistance R 35 ground connection; Be connected to backward diode D24 and inductance coil L02 with the collector electrode of triode Q07, inductance coil L02 joins by resistance R 40, electric capacity E11, C04 and power output end Vout.
2. high-power LED street lamp auto-control driving power according to claim 1, it is characterized in that: with described resistance R 40 resistance R 39 that has been in parallel, the end of the resistance R that is in parallel 40, R39 and the emitter of triode Q19 join, the base stage of triode Q19 is joined by the other end of resistance R 50 be in parallel resistance R 40, R39, the collector electrode of triode Q19 joins by resistance R 44 and the base stage of triode Q09, the base stage of triode Q09 is joined by the emitter of resistance R 31 with triode Q09, and the base stage of the collector electrode of triode Q09 and triode Q08 is joined.
3. high-power LED street lamp auto-control driving power according to claim 2, it is characterized in that: be connected to resistance R 41 and forward voltage-stabiliser tube Z1 with the contact of described resistance R 44 and triode Q09 base stage, the contact of the negative terminal of voltage-stabiliser tube Z1 and resistance R 43, R42 joins, and the other end of resistance R 43 and power output end Vout join.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920276961XU CN201571223U (en) | 2009-12-07 | 2009-12-07 | High-power LED streetlight automatic control driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920276961XU CN201571223U (en) | 2009-12-07 | 2009-12-07 | High-power LED streetlight automatic control driving power supply |
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| Publication Number | Publication Date |
|---|---|
| CN201571223U true CN201571223U (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920276961XU Expired - Fee Related CN201571223U (en) | 2009-12-07 | 2009-12-07 | High-power LED streetlight automatic control driving power supply |
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| CN (1) | CN201571223U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780199A (en) * | 2011-05-13 | 2012-11-14 | 海洋王照明科技股份有限公司 | Overcurrent protection circuit and lamp |
| CN102858048A (en) * | 2011-06-30 | 2013-01-02 | 海洋王照明科技股份有限公司 | LED driving circuit and LED lamp |
-
2009
- 2009-12-07 CN CN200920276961XU patent/CN201571223U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780199A (en) * | 2011-05-13 | 2012-11-14 | 海洋王照明科技股份有限公司 | Overcurrent protection circuit and lamp |
| CN102858048A (en) * | 2011-06-30 | 2013-01-02 | 海洋王照明科技股份有限公司 | LED driving circuit and LED lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100901 Termination date: 20121207 |