CN103547045A - Drive power supply of LED energy-saving lamp - Google Patents
Drive power supply of LED energy-saving lamp Download PDFInfo
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- CN103547045A CN103547045A CN201310556129.6A CN201310556129A CN103547045A CN 103547045 A CN103547045 A CN 103547045A CN 201310556129 A CN201310556129 A CN 201310556129A CN 103547045 A CN103547045 A CN 103547045A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a drive power supply of an LED energy-saving lamp. The drive power supply is composed of an Adapter power supply, an LED constant-current boost power supply and the LED lamp. The Adapter power supply and the LED constant-current boost power supply are arranged on the same circuit board. According to the Adapter power supply, alternative currents are input and pass through an EMI filter circuit, a bridge rectifier circuit, an isolation voltage reduction circuit, a PWM control circuit and a sampling circuit, and finally 12V direct-current voltage is outputted through an LC filter circuit. The LED constant-current boost power supply is composed of a voltage stabilizing circuit, the PWM control circuit, a boost circuit and the sampling circuit. According to the drive power supply of the LED energy-saving lamp, the 12V direct-current voltage is outputted by the Adapter power supply and then passes through the LED constant-current boost power supply, and a constant-current power supply is outputted to drive the LED lamp. According to the technical scheme, the circuit is simple in design, over-voltage protection can be effectively achieved, and output currents are constant. The LED energy-saving lamp is safe, reliable, and capable of ensuring normal work of the circuits, improving the output power of the LED energy-saving lamp, reducing the production cost and prolonging the service life of the LED energy-saving lamp.
Description
Technical field
The invention belongs to control circuit, be specifically related to a kind of LED electricity-saving lamp driving power.
Background technology
LED is a kind of very competitive new type light source, compare with traditional incandescent lamp and fluorescent lamp, LED light fixture has the advantages such as low in energy consumption, brightness is high, volume is little, the life-span is long, just progressively replace existing incandescent lamp and fluorescent lamp, start to be widely used in full-colour display screen, traffic lights, automobile lamp, background light source, Special Work illumination etc., become lighting field new generation of green light source.But, because the forward voltage-current characteristic of LED is very steep, dynamic electric resistor is little, makes to use mains voltage source directly to power, otherwise when voltage increases, the electric current that flows through LED can sharply increase, and causes LED lamp to burn out, therefore, must design constant current or constant-voltage driving power source, fully meet the driving requirement that LED works required, thereby bring into play to greatest extent the performance of LED, reduce failure rate.Yet; existing various LED lamp driving power source; circuit is complicated, and cost is high, and cost performance is low; be difficult to realize constant current output; in addition, larger at existing mains fluctuation, existing LED electricity-saving lamp driving power is owing to lacking overvoltage protection; so often cause LED electricity-saving lamp to damage, affect the useful life of LED electricity-saving lamp.
Summary of the invention
The object of the present invention is to provide a kind of LED electricity-saving lamp driving power; this device circuit simplicity of design; can effectively realize overvoltage protection; constant output current; safe and reliable, guaranteed circuit normal operation, improved the power output of LED electricity-saving lamp; reduce production cost, extended LED electricity-saving lamp useful life.
For achieving the above object, a kind of LED electricity-saving lamp of the present invention driving power, comprise Adapter power supply, LED constant current booster power and LED lamp, Adapter power supply comprises exchanging to be inputted, EMI filter circuit, bridge rectifier, isolated buck circuit, pwm control circuit and sample circuit, finally by LC filter circuit output 12V direct voltage, this LED electricity-saving lamp driving power is exported 12V direct voltage after LED constant current booster power by Adapter power supply, output constant current power drives LED lamp, it is characterized in that: Adapter power supply and LED constant current booster power are arranged on a circuit board, LED constant current booster power is comprised of voltage stabilizing circuit, pwm control circuit, booster circuit and sample circuit, described voltage stabilizing circuit is comprised of triode Q1, base biasing resistor R1, collector resistance R2, voltage-stabiliser tube DZ1 and capacitor C 1, the base stage of triode Q1 is connected with 12V direct voltage after resistance R 1, an end of voltage-stabiliser tube DZ1 is connected on the base stage of triode Q1, other end ground connection, the emitter of triode Q1 connects the rear ground connection of capacitor C 1, the IC that described pwm circuit is is OCP8107 by model, diode D1, capacitor C 2, resistance R 3, R4, R5 and R6 form, direct voltage 12V is connected with 1 pin of IC after resistance R 4, 1 pin of IC is connected with the emitter of the triode Q1 in voltage stabilizing circuit, 2 pin are connected with the LC filter circuit in Adapter power supply after resistance R 5, 3 pin after being connected in series with capacitor C 2 again with 4 pin and connect, through diode D1, resistance R 6 is connected with the LC filter circuit in Adapter power supply, 5 pin are through R8, ground connection after C4 oscillating circuit, 6 pin and 7 pin ground connection, after 8 pin output pwm signals and resistance R 3 serial connections, be connected with the grid G of metal-oxide-semiconductor in booster circuit, described booster circuit is comprised of metal-oxide-semiconductor U1, inductance L, diode D2 and capacitor C 3, the source S ground connection of metal-oxide-semiconductor U1, the drain D of metal-oxide-semiconductor U1 is connected with diode D2, diode D2 is connected with the DC power supply of 12V with inductance L 1, and the drain D of metal-oxide-semiconductor U1 is ground connection after diode D2, capacitor C 3 connect, described sample circuit is comprised of diode D3, resistance R 9, R10, R11 and R12, diode D3, resistance R 9, R10 and R11 are in parallel, output current passes through R9, R10, R11 sampling, the duty ratio that 4 pin detection voltages of process resistance R 12 to IC and internal reference ADJ relatively adjust PWM output signal.
In technique scheme, there is following advantage: the first, due to Adapter power supply and LED constant current booster power are arranged on a circuit board, saved cost, be convenient to install.The second, increased voltage stabilizing circuit, when input voltage is during higher than 18V, after R1, DZ1 voltage stabilizing, making output voltage is the 11.3V of voltage stabilizing, has guaranteed that IC can work.The 3rd, the IC that is OCP8107 due to model in circuit is designed with output over-voltage protection function, can effectively realize overvoltage protection, safe and reliable.The 4th, designed pwm control circuit, booster circuit and sample circuit, improved the power output of LED electricity-saving lamp, guaranteed constant output current, extended the useful life of LED electricity-saving lamp.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of a kind of LED electricity-saving lamp of the present invention driving power;
Fig. 2 is the concrete structure block diagram of Fig. 1;
Fig. 3 is the circuit theory diagrams of LED constant current booster power in a kind of LED electricity-saving lamp of the present invention driving power.
Embodiment
Below in conjunction with accompanying drawing, a kind of LED electricity-saving lamp driving power of the present invention is described in further detail.
By Fig. 1, Fig. 2 and Fig. 3 are visible, a kind of LED electricity-saving lamp driving power of the present embodiment is by Adapter power supply, LED constant current booster power and LED lamp form, Adapter power supply is by exchanging input through EMI filter circuit, bridge rectifier, isolated buck circuit, pwm control circuit and sample circuit, finally by LC filter circuit output 12V direct voltage, this LED electricity-saving lamp driving power is exported 12V direct voltage after LED constant current booster power by Adapter power supply, output constant current power drives LED lamp, in the present embodiment, Adapter power supply and LED constant current booster power are arranged on a circuit board.As seen from Figure 3, LED constant current booster power is by voltage stabilizing circuit, pwm control circuit, booster circuit and sample circuit form, voltage stabilizing circuit is by triode Q1, base biasing resistor R1, collector resistance R2, voltage-stabiliser tube DZ1 and capacitor C 1 form, the base stage of triode Q1 is connected with 12V direct voltage after resistance R 1, an end of voltage-stabiliser tube DZ1 is connected on the base stage of triode Q1, other end ground connection, the emitter of triode Q1 connects the rear ground connection of capacitor C 1, because IC is when input voltage surpasses 18V, with regard to cisco unity malfunction, therefore in the present embodiment, increased voltage stabilizing circuit, when input voltage is during higher than 18V, through R1, after DZ1 voltage stabilizing, making output voltage is the 11.3V of voltage stabilizing, guaranteed that IC can work.The IC that pwm circuit is is OCP8107 by model, diode D1, capacitor C 2, resistance R 3, R4, R5 and R6 form, direct voltage 12V is connected with 1 pin of IC after resistance R 4, 1 pin of IC is connected with the emitter of the triode Q1 in voltage stabilizing circuit, 2 pin are connected with the LC filter circuit in Adapter power supply after resistance R 5, 3 pin after being connected in series with capacitor C 2 again with 4 pin and connect, through diode D1, resistance R 6 is connected with the LC filter circuit in Adapter power supply, 5 pin are through R8, ground connection after C4 oscillating circuit, 6 pin and 7 pin ground connection, after 8 pin output pwm signals and resistance R 3 serial connections, be connected with the grid G of metal-oxide-semiconductor in booster circuit, booster circuit is comprised of metal-oxide-semiconductor U1, inductance L, diode D2 and capacitor C 3, the source S ground connection of metal-oxide-semiconductor U1, the drain D of metal-oxide-semiconductor U1 is connected with diode D2, and diode D2 is connected with the DC power supply of 12V with inductance L 1, and the drain D of metal-oxide-semiconductor U1 is ground connection after diode D2, capacitor C 3 connect, sample circuit is comprised of diode D3, resistance R 9, R10, R11 and R12, diode D3, resistance R 9, R10 and R11 are in parallel, output current passes through R9, R10, R11 sampling, 4 pin detection voltages and internal reference ADJ through resistance R 12 to IC relatively adjust the duty ratio of PWM output signal, thereby have guaranteed that actual output current is constant.
In the above-described embodiments, the ON voltage in Adapter power supply is through R5, and to 2 pin of IC, when voltage surpasses 2V, IC starts working, and by 8 pin output pwm signals.When pwm signal is high potential, metal-oxide-semiconductor U1 conducting, direct voltage ground connection after inductance L 1, metal-oxide-semiconductor U1 of input 12V, when pwm signal is electronegative potential, metal-oxide-semiconductor U1 cut-off, because inductance L 1 two ends electric current can not suddenly change, so the electric current of inductance L 1 charges to capacitor C 3 by diode D2, C3 both end voltage raises, and has boosted.The rear output current that boosted passes through R9, R10, and R11 sampling, 4 pin of process resistance R 12 to IC detect voltages and internal reference ADJ relatively adjusts, thereby have guaranteed that actual output current is constant.The present embodiment circuit design is simple, can effectively realize overvoltage protection, and constant output current is safe and reliable, has guaranteed circuit normal operation, has improved the power output of LED electricity-saving lamp, has reduced production cost, has extended LED electricity-saving lamp useful life.
Claims (1)
1. a LED electricity-saving lamp driving power, comprise Adapter power supply, LED constant current booster power and LED lamp, Adapter power supply comprises interchange input, EMI filter circuit, bridge rectifier, isolated buck circuit, pwm control circuit and sample circuit, finally by LC filter circuit output 12V direct voltage, this LED electricity-saving lamp driving power is exported 12V direct voltage after LED constant current booster power by Adapter power supply, output constant current power drives LED lamp, is characterized in that: Adapter power supply and LED constant current booster power are arranged on a circuit board, LED constant current booster power is comprised of voltage stabilizing circuit, pwm control circuit, booster circuit and sample circuit, described voltage stabilizing circuit is comprised of triode Q1, base biasing resistor R1, collector resistance R2, voltage-stabiliser tube DZ1 and capacitor C 1, the base stage of triode Q1 is connected with 12V direct voltage after resistance R 1, an end of voltage-stabiliser tube DZ1 is connected on the base stage of triode Q1, other end ground connection, the emitter of triode Q1 connects the rear ground connection of capacitor C 1, the IC that described pwm circuit is is OCP8107 by model, diode D1, capacitor C 2, resistance R 3, R4, R5 and R6 form, direct voltage 12V is connected with 1 pin of IC after resistance R 4, 1 pin of IC is connected with the emitter of the triode Q1 in voltage stabilizing circuit, 2 pin are connected with the LC filter circuit in Adapter power supply after resistance R 5, 3 pin after being connected in series with capacitor C 2 again with 4 pin and connect, through diode D1, resistance R 6 is connected with the LC filter circuit in Adapter power supply, 5 pin are through R8, ground connection after C4 oscillating circuit, 6 pin and 7 pin ground connection, after 8 pin output pwm signals and resistance R 3 serial connections, be connected with the grid G of metal-oxide-semiconductor in booster circuit, described booster circuit is comprised of metal-oxide-semiconductor U1, inductance L, diode D2 and capacitor C 3, the source S ground connection of metal-oxide-semiconductor U1, the drain D of metal-oxide-semiconductor U1 is connected with diode D2, diode D2 is connected with the DC power supply of 12V with inductance L 1, and the drain D of metal-oxide-semiconductor U1 is ground connection after diode D2, capacitor C 3 connect, described sample circuit is comprised of diode D3, resistance R 9, R10, R11 and R12, diode D3, resistance R 9, R10 and R11 are in parallel, output current passes through R9, R10, R11 sampling, the duty ratio that 4 pin detection voltages of process resistance R 12 to IC and internal reference ADJ relatively adjust PWM output signal.
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| CN201310556129.6A CN103547045A (en) | 2013-11-12 | 2013-11-12 | Drive power supply of LED energy-saving lamp |
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| CN201310556129.6A CN103547045A (en) | 2013-11-12 | 2013-11-12 | Drive power supply of LED energy-saving lamp |
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| CN103547045A true CN103547045A (en) | 2014-01-29 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107752629A (en) * | 2017-11-23 | 2018-03-06 | 深圳佳莱知家科技有限公司 | A kind of cervical vertebra massage pillow |
| CN109526105A (en) * | 2018-12-18 | 2019-03-26 | 深圳茂硕电子科技有限公司 | A kind of LED drive power of isolation shutdown output voltage |
| CN109874216A (en) * | 2019-04-02 | 2019-06-11 | 宁波市星耀智能科技有限公司 | A kind of luminous environment intelligence control system |
| CN110277911A (en) * | 2018-03-15 | 2019-09-24 | 深圳市三诺数字科技有限公司 | Power supply circuit and sound equipment applied to sound equipment |
| CN113890345A (en) * | 2021-09-22 | 2022-01-04 | 深圳市康力欣电子有限公司 | Central integration boosting power supply system applied to mobile phone tablet |
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2013
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107752629A (en) * | 2017-11-23 | 2018-03-06 | 深圳佳莱知家科技有限公司 | A kind of cervical vertebra massage pillow |
| CN110277911A (en) * | 2018-03-15 | 2019-09-24 | 深圳市三诺数字科技有限公司 | Power supply circuit and sound equipment applied to sound equipment |
| CN110277911B (en) * | 2018-03-15 | 2024-06-11 | 深圳市三诺数字科技有限公司 | Power supply circuit applied to sound equipment and sound equipment |
| CN109526105A (en) * | 2018-12-18 | 2019-03-26 | 深圳茂硕电子科技有限公司 | A kind of LED drive power of isolation shutdown output voltage |
| CN109526105B (en) * | 2018-12-18 | 2024-02-02 | 深圳茂硕电子科技有限公司 | LED driving power supply for isolating and switching off output voltage |
| CN109874216A (en) * | 2019-04-02 | 2019-06-11 | 宁波市星耀智能科技有限公司 | A kind of luminous environment intelligence control system |
| CN113890345A (en) * | 2021-09-22 | 2022-01-04 | 深圳市康力欣电子有限公司 | Central integration boosting power supply system applied to mobile phone tablet |
| CN113890345B (en) * | 2021-09-22 | 2024-05-28 | 深圳市康力欣电子有限公司 | Central integrated boost power supply system applied to mobile phone tablet |
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Application publication date: 20140129 |