CN101861021A - Lighting LED digital power-driven management control circuit - Google Patents
Lighting LED digital power-driven management control circuit Download PDFInfo
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- CN101861021A CN101861021A CN201010182708A CN201010182708A CN101861021A CN 101861021 A CN101861021 A CN 101861021A CN 201010182708 A CN201010182708 A CN 201010182708A CN 201010182708 A CN201010182708 A CN 201010182708A CN 101861021 A CN101861021 A CN 101861021A
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Abstract
The invention relates to a lighting LED digital power-driven management control circuit, which comprises a digital pulse width modulation module, an analog to digital converter module ADC, a full digital phase-locked loop module, a microcontroller module and a digital compensator module. A digital circuit replaces the traditional analog circuit or mixed signal circuit, and the digital pulse width modulation module DPWM is adopted to digitally manage an independent digital control loop and a phase to monitor, control and manage DC/DC load point power conversion so as to provide a stable power supply to adjust the brightness of the LED; and the required control function can be realized under the control of the microcontroller according to the requirement of a user. Therefore, the complexity of the system is reduced, the integrity of the circuit is improved, the whole design can be realized by the hardware description language and the design and manufacture flow is simplified.
Description
Technical field
The present invention relates to mains lighting supply driven management control circuit, be specifically related to the digital power-driven management control circuit of a kind of Light-Emitting Diode LED (Light Emitting Diode).
Background technology
The LED light fixture has high energy-conservation, long-life, be beneficial to environmental protection, be easy to advantages such as light modulation and turn-on time be very fast, add that environmental consciousness is high bloated at present all over the world, therefore the high like this LED lamp of efficient just is received by the market greatly, be widely used in fields such as lighting of home, outdoor lightings, and will become the development trend of Lighting Industry.
In the at present used LED chip for driving; the mode that its power management control module all uses simulation or digital-to-analogue to mix mostly realizes; its structure chart adopts analog pulse width modulation (PWM) (PulseWidth Modulation) mode to realize dimming function as shown in Figure 1.Analog pulse width modulation (PWM) integrated circuit (IC) (Integrated Circuit) has only two tasks: power output and regulation voltage.Such as monitor or diagnosis to wait other functions to be regarded as unnecessary.Need in only a few under the situation of these functions, then can realize by external chip.The principle of PWM is exactly under the situation that input voltage, inner parameter and external load change, control circuit carries out closed loop feedback by the difference of controlled signal and reference signal, regulate the conducting pulse duration of IC interior switching device, make controlled signals such as output voltage or electric current stable.In this control chip, by sampler to the current sample in the feedback loop, compare the back at the reference current that provides with reference voltage and produce a feedback current, this feedback current produces the pulse signal with certain duty ratio at pulse width modulation apparatus, by changing the output duty of ratio, regulate the light of external LED light source with this.If the user wants the operating state of the autotelic change light source of actual demand according to oneself, must control the operating state of light source at the external microprocessor of control chip or digital signal processor DSP (Digital SignalProcessor).
The realization of analog control circuit need be used non-essential resistance, electric capacity and need very big space, and the value of these components and parts itself also can be in time, the variation of temperature and other environmental condition and changing, thereby the stability of a system and responding ability are caused negative effect.And the value of these resistance, electric capacity is determined when all being design debug, after finishing, manufacturing can not change easily, if realization greater functionality, will design more directly feedback circuit, thereby cause control circuit to become very complicated, simulation control simultaneously can't provide optimized control response for all magnitudes of voltage or POL, and the test of analogue system and safeguard all very difficulty.
Summary of the invention
The objective of the invention is to solve the above-mentioned shortcoming of existing LED lamp analog power control module, a kind of LED illumination digital power-driven management control circuit is provided.Analog circuit before this management control circuit replaces with digital circuit, adopt digital pulse width modulation circuit DPWM (Digital Pulse WidthModulation) by digital management to independent digit control loop and phase place, realization is monitored, is controlled and manage DC/DC (DC:Direct Current) POL power source conversion, so that being provided, stable power comes driving LED, the voltage wave amplitude that reduces tradition power supply module causes the instability of system, and DPWM does not need to adopt the liquid electric capacity of traditional higher amount to involve filter action as storage.Not only reduce the complexity of power supply, improved problems such as error common in the analog power, aging (precision that comprises analogue device), temperature effect, drift, compensation, need not tuning, good reliability, can obtain unanimity, stable Control Parameter.By with the analog information digitlization, can carry out multiplication and division to each bar information, add computing, transmission, compensation, filtration and storage, therefore can also realize non-linear and asynchronous algorithm, improving mapping, thereby improve control precision and reliability.
The invention provides a kind of LED driven management control circuit of numeral; its technical scheme is the pulse-width modulation circuit by adopting digital pulse width modulation module DPWM to replace traditional simulation or digital-to-analogue to mix; can regulate the light of LED, and realize specific lighting demand according to user's request.This LED driven management control circuit comprises digital pulse width modulation module DPWM, analog to digital converter modules A DC (Analog-to-digitalconverter), all-digital phase-locked loop module, micro controller module and digital compensator module.
Wherein, described micro controller module respectively with analog to digital converter modules A DC, the digital pulse width modulation circuit, the digital compensator module links to each other with all-digital phase-locked loop, the all-digital phase-locked loop module respectively with micro controller module, analog to digital converter modules A DC, the digital pulse width modulation module links to each other with the digital compensator module, the external reference voltage of analog to digital converter modules A DC and respectively with micro controller module, the digital compensator module links to each other with the all-digital phase-locked loop module, the digital pulse width modulation module respectively with microcontroller, the all-digital phase-locked loop module links to each other with the digital compensator module, the digital compensator module respectively with micro controller module, the all-digital phase-locked loop module, ADC links to each other with the digital pulse width modulation module.
Digital pulse width modulation module DPWM links to each other with the digital compensator module under the control of micro controller module, by to the independently digital management of digital control loop and phase place, change the duty ratio of input pulse in the digital compensator, and output in the switching circuit, realization is monitored, is controlled and manage DC/DC POL power source conversion, so that stable power output to be provided, in order to regulate light.
Analog to digital converter modules A DC is external to provide the reference voltage of reference voltage for it, and link to each other with the digital compensator module, be used for substituting the error amplifier of analogue system, under the control of micro controller module, convert input voltage to binary number through behind the sample quantization, and the maintenance certain precision, be input in digital pulse width modulation module DPWM and the micro controller module.
Duty cycle control signal of the common generation of digital compensator module and analog to digital converter modules A DC is adjusted the output phase of digital pulse width modulation module DPWM.
The all-digital phase-locked loop module links to each other with microcontroller, analog to digital converter modules A DC, digital compensator and digital pulse width modulation module DPWM respectively, its function is to be used for the clock frequency and the phase place of each module of comparison, make output signal synchronous with input signal on frequency and phase place, finally make the clock synchronization of each module.
Microcontroller links to each other with all-digital phase-locked loop module, analog to digital converter modules A DC, digital compensator, digital pulse width modulation module DPWM respectively, be used for the control figure chip and finish work such as signal sampling, processing and PWM output, can realize specific controlled function according to user's request simultaneously.
Each module of the present invention all is to realize with digital circuit, preferably makes the integrated circuit control chip, owing to simultaneously microcontroller also is integrated into chip internal, has improved the integrated level of chip.
LED power management module of the present invention adopts digital form to realize, realizes the adjusting of light with the digital pulse width modulation system, and realizes the needed regulatory function of client under the control of microcontroller.Because the integrated level of digital power is very high, the complexity of system does not increase too much with the increase of function, peripheral components is (capability of fast response of digital power can also reduce the requirement to output filter capacitor) seldom, reduced and accounted for the plate area, just can finish entire circuit design with hardware description language, simplify and manufacture and design flow process.Simultaneously, the ability of the automatic diagnosis of digital power, adjusting makes debugging and maintenance work become light.
Description of drawings
Fig. 1 is the framework schematic diagram of traditional simulation LED drive control module;
Fig. 2 is a digital LED power management control module framework schematic diagram.
Embodiment
The invention provides the digital power-driven management control circuit that a kind of light-emitting diode is provided, analog circuit before this management control circuit replaces with digital circuit comprises digital pulse width modulation module DPWM, analog to digital converter modules A DC, all-digital phase-locked loop module, micro controller module and digital compensator module.Concrete structure as shown in Figure 2.
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.The structure of digital LED power-driven management control circuit of the present invention, as shown in Figure 2.Comprise digital pulse width modulation module, analog to digital converter modules A DC (being called for short the ADC module), all-digital phase-locked loop module, micro controller module and digital compensator module.
Described micro controller module respectively with analog to digital converter modules A DC, the digital pulse width modulation circuit, the digital compensator module links to each other with all-digital phase-locked loop, the all-digital phase-locked loop module respectively with micro controller module, analog to digital converter modules A DC, the digital pulse width modulation module links to each other with the digital compensator module, the external reference voltage of analog to digital converter modules A DC and respectively with micro controller module, the digital compensator module links to each other with the all-digital phase-locked loop module, the digital pulse width modulation module respectively with microcontroller, the all-digital phase-locked loop module links to each other with the digital compensator module, the digital compensator module respectively with micro controller module, the all-digital phase-locked loop module, analog to digital converter modules A DC links to each other with the digital pulse width modulation module.
Input voltage and the outside reference voltage that provides are provided ADC module in this digital LED power-driven management control circuit, and link to each other with microcontroller, digital compensator, all-digital phase-locked loop module.Wherein modules A DC samples, quantizes input voltage under the control of microcontroller, and exports the pulse with certain duty ratio jointly with the digital compensator module.The ADC module is all exported a series of numerals to each parameter, and each numeral was separated by the known time period.These values are supplied with the micro controller module that disposal ability is provided for system.The control algolithm of microcontroller is loaded in the memory that microcontroller carries, and these algorithms are responsible for carrying out the calculating of the output valve of a series of relevant ADC modules.Parameters such as these result calculated comprise error signal, the optimal delay value of the driver-level pulsewidth of wanting, various driver output and loop compensation.Its control clock is synchronous by adjusting and other modules of all-digital phase-locked loop.
The digital compensator module links to each other with ADC module and digital pulse width modulation module, under the control of microcontroller, produce pulse jointly with the ADC module with certain duty ratio, and be input in the digital pulse width modulation module, its control clock is synchronous by adjusting and other modules of all-digital phase-locked loop.
The digital pulse width modulation module links to each other with the digital compensator module under the control of micro controller module, by to the independently digital management of digital control loop and phase place, change the duty ratio of input pulse in the digital compensator, and output in the switching circuit, thereby realize DC/DC POL power source conversion is monitored, controlled and manages, so that stable power output to be provided, and the light or the ON time of regulating LED according to demand.Its control clock is synchronous by adjusting and other modules of all-digital phase-locked loop module.
The all-digital phase-locked loop module links to each other by clock with micro controller module, ADC module, digital compensator module and digital pulse width modulation module respectively, its function is to be used for the frequency and the phase place of different clocks in other modules of comparison, make output signal synchronous with input signal on frequency and phase place, finally make the control clock synchronization of each module.
Micro controller module respectively with all-digital phase-locked loop module, ADC module, digital compensator module, digital pulse width modulation module by linking to each other, preferred DSP (Digital Signal Processor) or the MCU (Micro Processor Unit) of using is used for the control figure chip and finishes work such as signal sampling, processing and PWM output.Demand according to the user, in micro controller module, implant the respective algorithms program, thereby can control sampling interval, the quantified precision of ADC, and revise the parameter of digital compensator in good time, control figure compensator cycle-index, thereby the duty ratio of the input pulse of control figure pulse width modulation module, simultaneously, the output pulse that also can change the digital pulse width modulation module as required is to obtain required illuminating effect.Its control clock is synchronous by adjusting and other module of all-digital phase-locked loop.
Existing LED Drive and Control Circuit adopts analog circuit to realize more.Though analog circuit realizes that technology is ripe at present, its circuit complexity, and lack flexibility and adaptability.LED driven management control circuit of the present invention adopts digital circuit to realize, utilizes hardware language just can realize whole Drive and Control Circuit, and one group of duty cycle control signal of the common generation of ADC and digital compensator is used for the output phase of control figure pulse-width modulation.Microcontroller is used to control the sampling interval of ADC and the operating state of digital compensator, and the output duty cycle of control figure pulse-width modulation, and the all-digital phase-locked loop clock of each module synchronously, these modules are finished the adjustment to output pulse width jointly, thereby realize the required lighting requirement of user.
Claims (4)
1. a lighting LED digital power-driven management control circuit is characterized in that, this circuit comprises the digital pulse width modulation module, analog to digital converter modules A DC, and the all-digital phase-locked loop module, micro controller module and digital compensator module,
Described micro controller module links to each other with all-digital phase-locked loop with analog to digital converter modules A DC, digital pulse width modulation circuit, digital compensator module respectively; The all-digital phase-locked loop module links to each other with the digital compensator module with micro controller module, analog to digital converter modules A DC, digital pulse width modulation module respectively; The external reference voltage of analog to digital converter modules A DC also links to each other with micro controller module, digital compensator module and all-digital phase-locked loop module respectively; The digital pulse width modulation module links to each other with microcontroller, all-digital phase-locked loop module and digital compensator module respectively; The digital compensator module links to each other with the digital pulse width modulation module with micro controller module, all-digital phase-locked loop module, analog to digital converter modules A DC respectively.
2. digital LED power-driven management control circuit according to claim 1 is characterized in that described circuit is an integrated circuit (IC) chip.
3. the LED power-driven management control circuit of numeral according to claim 1 and 2 is characterized in that described all-digital phase-locked loop module links to each other by clock with analog to digital converter modules A DC, digital pulse width modulation module and digital compensator module respectively.
4. the LED power-driven management control circuit of numeral according to claim 1 and 2 is characterized in that described micro controller module selects DSP or MCU for use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010182708A CN101861021A (en) | 2010-05-25 | 2010-05-25 | Lighting LED digital power-driven management control circuit |
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| CN201010182708A CN101861021A (en) | 2010-05-25 | 2010-05-25 | Lighting LED digital power-driven management control circuit |
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| CN101861021A true CN101861021A (en) | 2010-10-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102469645A (en) * | 2010-11-04 | 2012-05-23 | 恒耀电子股份有限公司 | Backlight module and control device for backlight module of light-emitting diode |
| CN103096570A (en) * | 2011-11-08 | 2013-05-08 | 英飞特电子（杭州）股份有限公司 | Lighting adjustment control circuit |
| CN104333955A (en) * | 2014-11-11 | 2015-02-04 | 电子科技大学 | Numerically controlled LED drive circuit |
| CN112462914A (en) * | 2020-12-10 | 2021-03-09 | 天津理工大学 | Integrated power supply structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1895009A (en) * | 2003-08-27 | 2007-01-10 | 研能双树有限公司 | Apparatus and method for providing dimming control of lamps and electrical lighting systems |
| CN1902811A (en) * | 2003-11-21 | 2007-01-24 | 美国快捷半导体有限公司 | Power converter having improved control |
| US20090184896A1 (en) * | 2008-01-21 | 2009-07-23 | Samsung Sdi Co., Ltd. | Organic light emitting display and method of driving the same |
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2010
- 2010-05-25 CN CN201010182708A patent/CN101861021A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1895009A (en) * | 2003-08-27 | 2007-01-10 | 研能双树有限公司 | Apparatus and method for providing dimming control of lamps and electrical lighting systems |
| CN1902811A (en) * | 2003-11-21 | 2007-01-24 | 美国快捷半导体有限公司 | Power converter having improved control |
| US20090184896A1 (en) * | 2008-01-21 | 2009-07-23 | Samsung Sdi Co., Ltd. | Organic light emitting display and method of driving the same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102469645A (en) * | 2010-11-04 | 2012-05-23 | 恒耀电子股份有限公司 | Backlight module and control device for backlight module of light-emitting diode |
| CN102469645B (en) * | 2010-11-04 | 2014-04-02 | 恒耀电子股份有限公司 | Backlight module and control device for backlight module of light-emitting diode |
| CN103096570A (en) * | 2011-11-08 | 2013-05-08 | 英飞特电子（杭州）股份有限公司 | Lighting adjustment control circuit |
| CN104333955A (en) * | 2014-11-11 | 2015-02-04 | 电子科技大学 | Numerically controlled LED drive circuit |
| CN112462914A (en) * | 2020-12-10 | 2021-03-09 | 天津理工大学 | Integrated power supply structure |
| CN112462914B (en) * | 2020-12-10 | 2023-09-12 | 天津理工大学 | Integrated power supply structure |
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Application publication date: 20101013 |