CN204929366U - DALI interface circuit - Google Patents
DALI interface circuit Download PDFInfo
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- CN204929366U CN204929366U CN201520769246.5U CN201520769246U CN204929366U CN 204929366 U CN204929366 U CN 204929366U CN 201520769246 U CN201520769246 U CN 201520769246U CN 204929366 U CN204929366 U CN 204929366U
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Abstract
The utility model discloses a DALI interface circuit, including rectifier unit, level processing unit, unit and MOS pipe are kept apart in receiving and dispatching, what the unit adoption was kept apart in receiving and dispatching is the binary channels digit isolator of integrated DCDC converter, the output termination RX signal of the first passageway of binary channels numeral isolator, the input termination TX signal of second channel, the DALI signal is after the rectifier unit rectification, carry out the current -limiting steady voltage by level processing unit, input from the first passageway of binary channels digit isolator again, output by first passageway, MOS pipe switch will be controlled to the level height of transmitting terminal TX signal makes the DALI signal correspondingly become lowly or the high level. The utility model discloses a power supply of whole interface is given by the main power source to the binary channels digit isolator of integrated DCDC converter, makes DALI bus signal only provide digital information, has reduced received signal's delay, has improved DALI interface circuit's reliability, reduce DALI interface circuit's electric current demand, increased controlling means and controlgear quantity that the DALI bus can insert.
Description
Technical field
The utility model relates to the Lighting Control Assembly based on digital addressable lighting interface, is specifically related to a kind of DALI interface circuit.
Background technology
Digital addressable lighting interface (DALI) agreement is the unique international standard agreement in current Lighting control field.Typical structure based on the Lighting Control Assembly of DALI agreement is host-guest architecture, and a road DALI bus is made up of bus power source, maximum 64 control device and maximum 64 control appliances.Bus power source can provide maximum 250mA output current, and each control device and non-bus electric controller allow to consume 2mA electric current at most DALI bus, and bus-powered control appliance consumes 10mA electric current from bus usually.
Telecommunication circuit between DALI interface circuit control device and control appliance, Fig. 1 is current a kind of conventional DALI interface circuit, as shown in Figure 1, the isolated communication that DALI interface circuit adopts two optocoupler U1 and U2 to realize between DALI bus and control circuit.There are following problems in the DALI interface circuit of said structure:
(1) in order to protect photoelectrical coupler U1 normally to work, needing Q1, Q3, R5 to form a current limliting high tension protection circuit, adding the complexity of interface circuit.
(2) operating current of photoelectrical coupler U1 is provided by DALI bus, because the operating current of interface circuit is less than 2mA, be not enough to allow photoelectrical coupler U1 be in rated operation, cause the time delay of Received signal strength RX to reach 40 microseconds, reduce the reliability of communication.
(3) DALI bus can access in theory at most 64 control device and 64 control appliances, 64 control device consume 128mA bus current altogether, surplus is not enough to power to 64 non-bus electric controllers, more cannot meet the demand of bus-powered control appliance, cause DALI intelligent lighting system must reduce the quantity of control device and control appliance, and the control appliance using non-bus to power as far as possible, have impact on systemic-function greatly, add system complexity.
In view of this, be badly in need of now providing the DALI interface circuit that a kind of power is lower, time delay is shorter, structure is simpler, reliability is higher.
Utility model content
Technical problem to be solved in the utility model is that the RX signal lag of DALI interface circuit is longer and the problem that power is larger.
In order to solve the problem, the utility model provides a kind of DALI interface circuit, comprise rectification unit, level processing unit, transceiver insulation unit and metal-oxide-semiconductor, the two-channel digital isolator of what described transceiver insulation unit adopted is integrated DC/DC transducer, the input termination DALI signal of described rectification unit, the drain electrode of level processing unit and described metal-oxide-semiconductor described in the output termination of described rectification unit, the source ground of described metal-oxide-semiconductor, the output termination RX signal of the first passage of described two-channel digital isolator, the input termination TX signal of second channel, the grid of metal-oxide-semiconductor described in the output termination of the second channel of described two-channel digital isolator, DALI signal, after described rectification unit rectification, carries out flow-limiting voltage-stabilizing by described level processing unit, then inputs from the input of the first passage of described two-channel digital isolator, is exported by the output of first passage, TX signal is inputted by the input of the second channel of described two-channel digital isolator, and the level height according to TX signal controls metal-oxide-semiconductor switch, makes DALI signal correspondingly become low level or maintain high level.
In such scheme, level processing unit comprises electric current and voltage limiting module, the 4th resistance and electric capacity, and described electric current and voltage limiting module is composed in series successively by the first resistance, the second resistance, the 3rd resistance; After described 4th resistance and Capacitance parallel connection, the grid of metal-oxide-semiconductor described in a termination, other end ground connection.
In such scheme, also comprise voltage stabilizing didoe, the negative electrode of described voltage stabilizing didoe connects the output of described electric current and voltage limiting module, the plus earth of described voltage stabilizing didoe.
The utility model, the two-channel digital isolator of an integrated DC/DC transducer is used to instead of two optocouplers, enormously simplify circuit design, simultaneously, because two-channel digital isolator itself is worked by integrated DC/DC transducer, this transducer is powered by main power source instead of DALI bus, and components and parts in circuit can be worked under rated condition, reduce the time delay of DALI interface circuit signal, improve reliability; And digital isolator does not rely on DALI bus-powered, significantly reduce DALI bus input current, be reduced to 0.2mA from 2mA, therefore DALI bus can be accessed by more control device and control appliance.
Accompanying drawing explanation
Fig. 1 is existing DALI interface circuit schematic diagram;
The DALI interface circuit schematic diagram that Fig. 2 provides for the utility model.
Embodiment
The utility model provides a kind of DALI interface circuit, and circuit structure is simple, power is low, and signal lag is low, reliability is high.Below in conjunction with specification drawings and specific embodiments, the utility model is described in detail.
As shown in Figure 2, the DALI interface circuit that the utility model provides is made up of with transceiver insulation unit 30 rectification unit 10, level processing unit 20.
Level processing unit 20 is made up of electric current and voltage limiting module 201, the 4th resistance R6, metal-oxide-semiconductor Q2, electric capacity C1, voltage stabilizing didoe D2, and electric current and voltage limiting module 201 is composed in series successively by the first resistance R2, the second resistance R3, the 3rd resistance R4.What transceiver insulation unit 30 adopted is the two-channel digital isolator of integrated DC/DC transducer, and in the utility model, the model of two-channel digital isolator is ADUM5211.
Rectification unit 10 is made up of input protection resistor FR1 and rectifier bridge D1; the input of input protection resistor FR1 is connected DALI bus DA1, DA2 respectively with 3 pin of rectifier bridge D1; input protection resistor FR1 output connects 1 pin of rectifier bridge D1, the 4 pin ground connection of rectifier bridge D1.
The output (2 pin) of rectifier bridge D1 accesses the input of electric current and voltage limiting module 201 and the drain electrode of metal-oxide-semiconductor Q2; The output of electric current and voltage limiting module 201 connects two-channel digital isolator V
iApin (first passage input); After 4th resistance R6 and electric capacity C1 parallel connection, the grid of a termination metal-oxide-semiconductor Q2 and the V of two-channel digital isolator
oBpin (second channel output), other end ground connection, the 4th resistance R6 is used for providing stable starting resistor for metal-oxide-semiconductor Q2, and electric capacity C1 is for reducing current interference; The source ground of metal-oxide-semiconductor Q2, two-channel digital isolator GND
1pin and GND
2pin ground connection, two-channel digital isolator V
oApin (first passage output) connects RX signal, the V of two-channel digital isolator
iBpin (second channel input) connects TX signal, two-channel digital isolator VDD
1pin and VDD
2pin connects input voltage VCCI and VCC respectively.
Also be provided with a voltage stabilizing didoe D2 in level processing unit 20, the plus earth of voltage stabilizing didoe D2, negative electrode connects the output of electric current and voltage limiting module 201, to ensure two-channel digital isolator V
iAthe incoming level of pin is in the scope of regulation.
The operation principle of circuit is introduced below in conjunction with Fig. 2:
When DALI bus sends signal, TX signal keeps low level, metal-oxide-semiconductor Q2 ends, the DA1 of DALI bus is after rectification unit rectification, through rectifier bridge to after input signal rectification, entered the first passage of two-channel digital isolator by electric current and voltage limiting module 201 current limliting, exported after inside isolates by first passage, the level height of RX signal is consistent with the incoming level of the DA1 of DALI bus, and just high level is down to about 5V after electric current and voltage limiting module 201.
During DALI bus Received signal strength, the low and high level of transmitting terminal TX will control conducting or the cut-off of metal-oxide-semiconductor Q2, the DA1 of DALI bus is made to be dragged down as low level or maintain high level, specifically, when transmitting terminal TX sends high level, signal inputs through the second channel of two-channel digital isolator, inputs the grid of metal-oxide-semiconductor Q2 after carrying out internal insulation, make metal-oxide-semiconductor Q2 conducting, the high level in DALI bus is dragged down; When transmitting terminal TX sends low level, now metal-oxide-semiconductor Q2 ends, and DALI bus keeps high level.
The utility model, the two-channel digital isolator of integrated DC/DC transducer is adopted not only to achieve signal isolation, simultaneously, two-channel digital isolator does not rely on DALI bus to provide operating current, DALI bus only provides and is low to moderate 0.2mA electric current for signal transmission, therefore, reduce the power demands of transmission signal time delay and DALI interface circuit, improve the reliability of DALI interface circuit simultaneously.
The utility model is not limited to above-mentioned preferred forms, and anyone should learn the structural change made under enlightenment of the present utility model, and every have identical or close technical scheme with the utility model is bright, all falls within protection range of the present utility model.
Claims (3)
1. a DALI interface circuit, comprise rectification unit, level processing unit, transceiver insulation unit and metal-oxide-semiconductor, it is characterized in that, the two-channel digital isolator of what described transceiver insulation unit adopted is integrated DC/DC transducer, the input termination DALI bus of described rectification unit, the drain electrode of level processing unit and described metal-oxide-semiconductor described in the output termination of described rectification unit, the source ground of described metal-oxide-semiconductor, the output termination RX signal of the first passage of described two-channel digital isolator, the input termination TX signal of second channel, the grid of metal-oxide-semiconductor described in the output termination of the second channel of described two-channel digital isolator, DALI signal, after described rectification unit rectification, carries out flow-limiting voltage-stabilizing by described level processing unit, enters the input of the first passage of described two-channel digital isolator, then exports from the output of first passage, TX signal is inputted by the input of the second channel of described two-channel digital isolator, and the level height according to TX signal controls metal-oxide-semiconductor switch, makes DALI signal correspondingly become low level or maintain high level.
2. a kind of DALI interface circuit as claimed in claim 1, it is characterized in that, described level processing unit comprises electric current and voltage limiting module, the 4th resistance and electric capacity, and described electric current and voltage limiting module is composed in series successively by the first resistance, the second resistance, the 3rd resistance; After described 4th resistance and Capacitance parallel connection, the grid of metal-oxide-semiconductor described in a termination, other end ground connection.
3. a kind of DALI interface circuit as claimed in claim 2, it is characterized in that, also comprise voltage stabilizing didoe, the negative electrode of described voltage stabilizing didoe connects the output of described electric current and voltage limiting module, the plus earth of described voltage stabilizing didoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520769246.5U CN204929366U (en) | 2015-09-30 | 2015-09-30 | DALI interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520769246.5U CN204929366U (en) | 2015-09-30 | 2015-09-30 | DALI interface circuit |
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| Publication Number | Publication Date |
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| CN204929366U true CN204929366U (en) | 2015-12-30 |
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ID=54978458
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| CN201520769246.5U Active CN204929366U (en) | 2015-09-30 | 2015-09-30 | DALI interface circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106067803A (en) * | 2016-07-07 | 2016-11-02 | 上海兴珠信息科技有限公司 | The level-conversion circuit of digital addressable lighting interface DALI |
| CN108684119A (en) * | 2018-06-20 | 2018-10-19 | 苏州欧普照明有限公司 | A kind of hardware circuit based on DALI signal detections |
| CN109445505A (en) * | 2018-11-26 | 2019-03-08 | 珠海世讯科技有限公司 | A kind of bus-powered circuit of DALI |
| CN109445355A (en) * | 2018-12-13 | 2019-03-08 | 中国电子科技集团公司第五十八研究所 | A kind of isolated form sampling SIP |
| CN113661786A (en) * | 2019-03-28 | 2021-11-16 | 昕诺飞控股有限公司 | Power supply configuration across isolation barrier |
| CN113891538A (en) * | 2021-09-29 | 2022-01-04 | 深圳民爆光电股份有限公司 | DALI addressable intelligent sensing control system |
| CN114928259A (en) * | 2022-05-06 | 2022-08-19 | 深圳市晟瑞科技有限公司 | Communication interface circuit and power consumption device |
-
2015
- 2015-09-30 CN CN201520769246.5U patent/CN204929366U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106067803A (en) * | 2016-07-07 | 2016-11-02 | 上海兴珠信息科技有限公司 | The level-conversion circuit of digital addressable lighting interface DALI |
| CN106067803B (en) * | 2016-07-07 | 2023-09-08 | 浙江优联智能科技有限公司 | Level conversion circuit of digital addressable lighting interface DALI |
| CN108684119A (en) * | 2018-06-20 | 2018-10-19 | 苏州欧普照明有限公司 | A kind of hardware circuit based on DALI signal detections |
| CN108684119B (en) * | 2018-06-20 | 2023-07-18 | 苏州欧普照明有限公司 | Hardware circuit based on DALI signal detection |
| CN109445505A (en) * | 2018-11-26 | 2019-03-08 | 珠海世讯科技有限公司 | A kind of bus-powered circuit of DALI |
| CN109445505B (en) * | 2018-11-26 | 2024-01-02 | 珠海世讯科技有限公司 | DALI bus power supply circuit |
| CN109445355A (en) * | 2018-12-13 | 2019-03-08 | 中国电子科技集团公司第五十八研究所 | A kind of isolated form sampling SIP |
| CN113661786B (en) * | 2019-03-28 | 2024-04-05 | 昕诺飞控股有限公司 | Power supply configuration across isolation barrier |
| CN113661786A (en) * | 2019-03-28 | 2021-11-16 | 昕诺飞控股有限公司 | Power supply configuration across isolation barrier |
| US12016101B2 (en) | 2019-03-28 | 2024-06-18 | Signify Holding, B.V. | Power supply configuration across isolation barrier |
| CN113891538A (en) * | 2021-09-29 | 2022-01-04 | 深圳民爆光电股份有限公司 | DALI addressable intelligent sensing control system |
| CN114928259A (en) * | 2022-05-06 | 2022-08-19 | 深圳市晟瑞科技有限公司 | Communication interface circuit and power consumption device |
| CN114928259B (en) * | 2022-05-06 | 2023-12-29 | 深圳市晟瑞科技有限公司 | Communication interface circuit and power utilization device |
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