CN201398253Y - White light LED illumination driving circuit based on current mode charge pump - Google Patents

White light LED illumination driving circuit based on current mode charge pump Download PDF

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Publication number
CN201398253Y
CN201398253Y CN2009201074844U CN200920107484U CN201398253Y CN 201398253 Y CN201398253 Y CN 201398253Y CN 2009201074844 U CN2009201074844 U CN 2009201074844U CN 200920107484 U CN200920107484 U CN 200920107484U CN 201398253 Y CN201398253 Y CN 201398253Y
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positive
resistance
charge pump
triode
white light
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Expired - Fee Related
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CN2009201074844U
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Chinese (zh)
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张华�
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张华�
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Abstract

The utility model provides a white light LED illumination driving circuit based on a current mode charge pump, which can be accessed with an alternating current power supply, is high in adaptability and favorable for guaranteeing service life of the white light LED and saves electric power. The white light LED illumination driving circuit is characterized by comprising a full-wave bridge rectifiedfilter, a U-shaped filter and a bistable multivibrator, wherein an input anode end of the bistable multivibrator is connected with an output anode end thereof via a first inductor L1, the output anode end of the bistable multivibrator is connected with a cathode end thereof via a diode D5, a filter capacitor C5 and a second inductor L2 sequentially, and a current limiting resistor R6 and one or more white light LEDs are sequentially connected between two ends of the filter capacitor C5 in series.

Description

White-light LED illumination driving circuit based on current-type charge pump
Technical field
The utility model relates to the White-light LED illumination technology, particularly a kind of White-light LED illumination driving circuit based on current-type charge pump.
Background technology
In the prior art, white light LEDs is widely used in the LCD demonstration backlight in the consumer electronics products such as mobile phone, MP3 player, and it needs stable operating voltage, if operating voltage descends, then the brightness of white light LEDs reduces, and color is just not distinct, and display effect is just undesirable.White light LEDs can not be directly battery-powered, because battery uses at the beginning, voltage just successively decreases, influence display effect, therefore generally use battery as the power supply product in, be used for often using on the LCD white light LEDs design of drive circuit backlight the charge pump of a booster type, the cell voltage that falls progressively is raised to the operating voltage that it needs.
Along with the continuous development of semiconductor technology, with LED as the application of illumination more and more widely, it is little that it has a volume, the luminous efficiency height, and advantage such as the life-span is long, and is low in energy consumption, significant for energy-conserving and environment-protective.Be mainly used in automotive lighting at present, the building decoration illumination, and progressively enter the domestic lighting field.But LED is used for general lighting,, needs to increase specific drive circuit, insert the mains ac power supply, realize the practicability of white light LED lighting device to be suitable for than ordinary light source.
The utility model content
The utility model provides a kind of White-light LED illumination driving circuit based on current-type charge pump, can the incoming transport power supply, and adaptability is strong, helps ensureing the useful life and the saves energy of white light LEDs.
The technical solution of the utility model is:
A kind of White-light LED illumination driving circuit based on current-type charge pump, it is characterized in that, comprise can the incoming transport power supply the full-wave rectification bridge of forming by four diode D1 ~ D4, the dc voltage output end of described full-wave rectification bridge connects by one by resistance R 1 and two capacitor C 1, the ∏ mode filter that C2 forms, described ∏ mode filter connects current-type charge pump, the voltage output end Vout of described current-type charge pump connects by two resistance R 3, the bleeder circuit that R2 forms, described bleeder circuit output capacitance C3 in parallel, contact in the described bleeder circuit between two resistance connects charge pump feedback input end FB, described output capacitance C3 flip and flop generator in parallel, the output cathode end of described flip and flop generator is connected by first inductance L 1 between the positive terminal with input, the output cathode end of described flip and flop generator is connected negative pole end by a diode D5 with a filter capacitor C5 and second inductance L 2 successively, order is connected in series a current-limiting resistance R6 and one or above white light LEDs between the described filter capacitor C5 two ends, described flip and flop generator comprises a positive-negative-positive triode Q1, a NPN type triode Q2, two resistance R 4, R5 and a capacitor C 4, the collector electrode of described positive-negative-positive triode Q1 connects the base stage of NPN type triode Q2, the base stage of described positive-negative-positive triode Q1 is connected by a resistance R 5 with the base stage of NPN type triode Q2, and the base stage of described positive-negative-positive triode Q1 is connected the collector electrode of described NPN type triode Q2 successively with a resistance R 4 by a capacitor C 4.
Technique effect of the present utility model:
LED illumination driving circuit adaptability of the present utility model is strong, can keep efficient in the output voltage range inputing to of broad, has improved the working life of LED to a great extent,
Description of drawings
Fig. 1 is the utility model LED illumination driving circuit schematic diagram.
Embodiment
A kind of White-light LED illumination driving circuit based on current-type charge pump, comprise can the incoming transport power supply the full-wave rectification bridge of forming by four diode D1 ~ D4, the dc voltage output end of described full-wave rectification bridge connects by one by resistance R 1 and two capacitor C 1, the ∏ mode filter that C2 forms, described ∏ mode filter connects current-type charge pump, the voltage output end Vout of described current-type charge pump connects by two resistance R 3, the bleeder circuit that R2 forms, described bleeder circuit output capacitance C3 in parallel, contact in the described bleeder circuit between two resistance connects charge pump feedback input end FB, described output capacitance C3 flip and flop generator in parallel, the output cathode end of described flip and flop generator is connected by first inductance L 1 between the positive terminal with input, the output cathode end of described flip and flop generator is connected negative pole end by a diode D5 with a filter capacitor C5 and second inductance L 2 successively, order is connected in series a current-limiting resistance R6 and one or above white light LEDs between the described filter capacitor C5 two ends, described flip and flop generator comprises a positive-negative-positive triode Q1, a NPN type triode Q2, two resistance R 4, R5 and a capacitor C 4, the collector electrode of described positive-negative-positive triode Q1 connects the base stage of NPN type triode Q2, the base stage of described positive-negative-positive triode Q1 is connected by a resistance R 5 with the base stage of NPN type triode Q2, and the base stage of described positive-negative-positive triode Q1 is connected the collector electrode of described NPN type triode Q2 successively with a resistance R 4 by a capacitor C 4.
Referring to Fig. 1, a kind of LED illumination driving circuit based on current-type charge pump, adopt the civil power AC-powered, input is 110V ~ 220V alternating voltage in the circuit of Fig. 1, full-wave rectification bridge through four diode D1 ~ D4 composition, enter the ∏ mode filter of forming by resistance R 1 and capacitor C 1, C2, output dc voltage.The voltage input end Vin that connects current-type charge pump is inserted at two ends at this output voltage, input voltage as charge pump, the voltage output end Vout of charge pump connects by two resistance (R3, R2) bleeder circuit of Zu Chenging, contact in the described bleeder circuit between two resistance connects charge pump feedback input end (FB), the output capacitance C3 of described bleeder circuit charge pump in parallel.Charge pump adopts MCP1252/3 lowering and stabilizing blood pressure charge pump in the present embodiment, it is a voltage changer based on switching capacity, input voltage is boosted or step-down, and the voltage after the output voltage stabilizing, it can boost and the step-down working method between automatically switch, owing to connected divider resistance at its voltage output end and feedback input end, made output voltage stabilization and adjustable.
For preventing that charge pump output voltage from can not guarantee enough output, insert a flip and flop generator again at the output capacitance C3 two ends of charge pump, described flip and flop generator comprises 1 positive-negative-positive Q1 and 1 NPN type triode Q2,2 resistance R 4, R5 and 1 capacitor C 4, the collector electrode of positive-negative-positive triode Q1 connects the base stage of NPN type triode Q2, resistance R 5 is connected between the base stage of triode Q1, Q2, is connected between Q1 base stage and the Q2 collector electrode after capacitor C 4 and resistance R 4 series connection.Between the collector electrode of the emitter of Q1 and Q2, also be connected with energy storage inductor L2.Resistance R 5 provides the path of a starting current by emitter-base stage of Q1 and Q2.The Q2 conducting, and therefore make the Q1 conducting, make two transistors enter saturation condition very soon, inductance L 2 storage power.By base stage-collector electrode of R4 and R5 discharge and forward bias Q1, Q2, two transistors enter cut-off state to C4 subsequently, and the time constant of R2*C1 has determined ON time, and (R1+R2) * C2 determines the shut-in time,
Connect between the emitter and collector of Q2 and be in series with diode D5 and filter capacitor C5 and inductance L 3 successively, LED in parallel and current-limiting resistance R6 at the C5 two ends.LED is several white light LEDs that is connected in series.Present embodiment is 4 ~ 8 white light LEDs.

Claims (1)

1. White-light LED illumination driving circuit based on current-type charge pump, it is characterized in that, comprise can the incoming transport power supply by four diodes (full-wave rectification bridge of D1 ~ D4) form, the dc voltage output end of described full-wave rectification bridge connects by a resistance (R1) and two electric capacity (C1, C2) the ∏ mode filter of Zu Chenging, described ∏ mode filter connects current-type charge pump, the voltage output end of described current-type charge pump (Vout) connects by two resistance (R3, R2) bleeder circuit of Zu Chenging, a described bleeder circuit output capacitance (C3) in parallel, contact in the described bleeder circuit between two resistance connects charge pump feedback input end (FB), described output capacitance (C3) flip and flop generator in parallel, the output cathode end of described flip and flop generator is connected by first inductance (L1) between the positive terminal with input, the output cathode end of described flip and flop generator is connected negative pole end by a diode (D5) with a filter capacitor (C5) and second inductance (L2) successively, order is connected in series a current-limiting resistance (R6) and one or above white light LEDs between described filter capacitor (C5) two ends, described flip and flop generator comprises a positive-negative-positive triode (Q1), a NPN type triode (Q2), two resistance (R4, R5) and an electric capacity (C4), the collector electrode of described positive-negative-positive triode (Q1) connects the base stage of NPN type triode (Q2), the base stage of described positive-negative-positive triode (Q1) is connected by a resistance (R5) with the base stage of NPN type triode (Q2), and the base stage of described positive-negative-positive triode (Q1) is connected the collector electrode of described NPN type triode (Q2) successively with a resistance (R4) by an electric capacity (C4).
CN2009201074844U 2009-04-23 2009-04-23 White light LED illumination driving circuit based on current mode charge pump Expired - Fee Related CN201398253Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009201074844U CN201398253Y (en) 2009-04-23 2009-04-23 White light LED illumination driving circuit based on current mode charge pump

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Application Number Priority Date Filing Date Title
CN2009201074844U CN201398253Y (en) 2009-04-23 2009-04-23 White light LED illumination driving circuit based on current mode charge pump

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CN201398253Y true CN201398253Y (en) 2010-02-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101527983B (en) * 2009-04-23 2012-05-30 北京格林曼光电科技有限公司 White-light LED illumination driving circuit on basis of current-type charge pump
CN103561514A (en) * 2013-10-30 2014-02-05 广东省人民医院 Thoracic cavity minimally-invasive surgery lamp block, single-lamp device, double-lamp device and using methods of three parts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101527983B (en) * 2009-04-23 2012-05-30 北京格林曼光电科技有限公司 White-light LED illumination driving circuit on basis of current-type charge pump
CN103561514A (en) * 2013-10-30 2014-02-05 广东省人民医院 Thoracic cavity minimally-invasive surgery lamp block, single-lamp device, double-lamp device and using methods of three parts
CN103561514B (en) * 2013-10-30 2015-08-12 广东省人民医院 The using method of thoracic cavity Minimally Invasive Surgery lamp block, single lamp device and two lamp device and three

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C17 Cessation of patent right
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Granted publication date: 20100203

Termination date: 20110423