CN102113199A - Circuitry for power limiting of electronic assembly - Google Patents
Circuitry for power limiting of electronic assembly Download PDFInfo
- Publication number
- CN102113199A CN102113199A CN200980129977.0A CN200980129977A CN102113199A CN 102113199 A CN102113199 A CN 102113199A CN 200980129977 A CN200980129977 A CN 200980129977A CN 102113199 A CN102113199 A CN 102113199A
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- voltage
- unit
- power limitation
- circuit arrangement
- voltage detector
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- 230000003321 amplification Effects 0.000 claims abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 3
- 239000011469 building brick Substances 0.000 claims description 32
- 101100305328 Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720) rlmL gene Proteins 0.000 claims description 5
- 230000005669 field effect Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000011664 signaling Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/008—Intrinsically safe circuits
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- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
Circuitry for power limiting of an electronic assembly comprises units for power supplying, for voltage amplification and for power limiting. In known apparatus the power limiting unit is provided with resistors and Zener diodes which are only conditionally useful due to the large amount of heat occurring in case of a fault. The invention provides that the power limiting unit (27) has a voltage detector (31, 32) to determine any over-voltage and to output a switching signal if a threshold value of over-voltage is exceeded, and in the supply line (22) between the power supply unit (21) and the voltage amplifier unit (25) there is a switching element (23, 24) connected to the voltage detector (31, 32) via a switch-off line (29, 30).
Description
Technical field
The present invention relates to a kind of circuit arrangement that is used for electronic building brick is carried out Power Limitation, this circuit arrangement has energy feed unit, voltage and improves unit and Power Limitation unit, and this Power Limitation unit is connected to voltage and improves on the outlet line between unit and the electronic building brick.The sort circuit device is for example as the security control signalling (Totmannmelder) of motion detector or anti-contingency and used by the fireman.
Background technology
Under the situation of the known circuit arrangement that is used for realizing at superpotential situation this explosion-proof class, the Power Limitation unit comprises that being linked into voltage improves resistance in the outlet line between unit and the electronic building brick as current limiting element and comprise that two are access in parallel diode between outlet line and the ground as voltage limiting element.They reduce voltage by the heat that can only discharge bothersomely and improve the overvoltage that the unit is produced under failure conditions.These Zener diodes are as overvoltage protection or voltage limiting element is very inaccurately worked and be big and be expensive at manufacture view as passive device.In addition, be connected safeties after the energy feed unit and can blow and make circuit arrangement inoperative thus, make relevant electronic building brick no longer can be supplied to energy.Known circuit arrangement carries out function restriction by Zener diode to electronic building brick, has the running time of minimizing owing to its electrical loss power and have the dynamic characteristic of the difference that obtains thus under the battery operation situation.
Summary of the invention
Therefore, the present invention based on task be, a kind of circuit arrangement that is used for electronic building brick is carried out Power Limitation of this type is provided, wherein eliminate these shortcomings.
In order to solve this task, the present invention has designed, the Power Limitation unit has at least one voltage detector, be used for determining overvoltage and sending switching signal above under the situation of superpotential threshold value, and be provided with at least one in the supply lines between energy feed unit and voltage raising unit by turn-offing the switch element that circuit links to each other with voltage detector, this switch element is used for based on making in the switching signal that surpasses voltage detector under the situation of superpotential threshold value the energy of electronic building brick being supplied with interruption.
According to the present invention, utilize active device to monitor the voltage that will limit.If this voltage rises on the threshold value that is limited, then turn-off the energy feed unit.Narrow shutoff window can be set.Cancel high power conversion.Be connected not bearing load of energy feed unit safeties afterwards.Utilization device has in a circuit according to the invention been satisfied by that obtain about explosion-proof safety regulation and the required restriction to the voltage in the circuit arrangement, and the shortcoming of known circuit arrangement do not occur.
Obtain other favourable expansion scheme of the present invention by dependent claims.Like this, the Power Limitation unit has two voltage detectors according to the present invention, and be in series with two switch elements in the supply lines between energy feed unit and voltage raising unit, these two switch elements respectively link to each other with voltage detector respectively by the pipeline circuit.Thus, realized for explosion-proof required double safety.
In another expansion scheme of the present invention, each voltage detector all has the device that is used to realize the voltage divider of threshold value and has the internal reference source.In addition, between energy feed unit and switch element, be provided with reverse polarity protection's device.
At last, voltage divider is built as the STM1061 device and switch and reverse polarity protection's device are built as field-effect transistor (MOSFET).
Description of drawings
Below electronic building brick is carried out the circuit arrangement of Power Limitation by being used for shown in the accompanying drawings embodiment at length set forth the present invention.Wherein:
Fig. 1 shows the circuit arrangement according to prior art,
Fig. 2 shows the block diagram of device in a circuit according to the invention, and
Fig. 3 shows the embodiment of device in a circuit according to the invention.
Embodiment
According to Fig. 1 according to the output voltage that is used for the circuit arrangement that electronic building brick carries out Power Limitation is comprised battery forms of prior art for example for the energy feed unit 2 of 3V, for example be used for producing voltage for the higher voltage of 5V and improve unit 3, improve outlet line 4 between unit 3 and the electronic building brick 1, be linked into the resistance 5 of outlet line 4 and two and be inserted into from the parallel diode 8,9 of the circuit 6,7 of outlet line 4 bifurcateds at voltage.Resistance 5 and two Zener diodes 8,9 are formed for carrying out the Power Limitation unit 10 of electric current restriction and voltage limit.
Zener diode 8,9 improves the overvoltage that unit 3 produces by reducing by voltage with the heat that high expense is discharged under failure condition.Zener diode 8,9 is as voltage limiting element and overvoltage protection element work is too inaccurate and be big and be expensive at manufacture view as passive device.In addition, be connected unshowned safeties after the energy feed unit 2 and blow and make circuit arrangement inoperative, make electronic building brick 1 no longer can be supplied to energy.Owing to use Zener diode, thus function restriction obtained at the electronic building brick that is connected, when battery operation, because running time that electrical loss power obtains reducing and obtain the dynamic characteristic of difference generally.
In order to eliminate this shortcoming, be provided with circuit arrangement of the present invention according to Fig. 2 and 3.
According to the block diagram of Fig. 2 show electronic building brick 20, in particular for the electronic building brick 20 of the security control signalling of movement detector/anti-contingency of fireman, electronic building brick 20 is relevant with the intrinsically safe circuit device.The intrinsically safe circuit device comprises that energy feed unit 21, two switch in series 23,24 in supply lines 22, voltages improve unit 25 and Power Limitation unit 27, this voltage improves unit 25 and links to each other with electronic building brick 20 by outlet line 26, and this Power Limitation unit 27 links to each other with the outlet line 26 that leads to electronic building brick 20 by Voltage Feedback circuit 28 and turn- offs circuit 29,30 by two and links to each other with switch element 23,24.Power Limitation unit 27 comprises two unshowned shunt voltage detectors 31,32 in Fig. 2, and voltage detector 31,32 links to each other and therefore links to each other with switch element 23,24 with two shutoff circuits 29,30 respectively.
The voltage that is provided by the energy feed unit 21 of the form of 3V battery is improved unit 25 by voltage and brings up to 5V and lossless the electronic building brick 20 that is fed to.Utilize voltage detector parallel connection, that be formed with source block 31,32 of Power Limitation unit 27 to monitor the voltage that will limit.If this voltage that will limit rises on the voltage that is limited of 5.8V for example, then by at least one shutoff in the switch element 31,32 and turn-off energy feed unit 21 thus.By in Power Limitation unit 27, using two voltage detectors 31,32, for the situation realization double safety of one of voltage detector fault.
Shown in Figure 3 according to the embodiment that is used for electronic building brick 20 is carried out the circuit arrangement of Power Limitation of the present invention, (as in) according to the block diagram of Fig. 2 exist the 3V battery forms energy feed unit 21, supply lines 22, outlet line 26, turn-off the Power Limitation unit 27 that circuit 29,30, Voltage Feedback circuit 28, switch element 23,24, voltage improve unit 25 and have two voltage detectors 31,32.In the part of path 22a of supply lines 22, between energy feed unit 21 and two switch elements 23,24, additionally insert safety element 33 and reverse polarity protection's element 34.The part of path 22b of supply lines 22 makes second switch element 24 link to each other with voltage amplification unit 25.
Two switch elements 23,24 are built as field-effect transistor (MOSFET) with reverse polarity protection's device 34 and link to each other with supply lines 22 or its part of path 22a, 22b with the source S terminal with the drain D terminal.The ground connection G terminal of reverse polarity protection's element 34 links to each other with ground GND by the ground path 35 that also links to each other with energy feed unit 21.The ground connection G terminal of two switch elements 23,24 links to each other with the shutoff circuit 29,30 that is associated and therefore links to each other with the output of two voltage detectors 31,32.
Voltage improves unit 25 and is access between the tie point 36 and the tie point 37 to the outlet line 26 of electronic building brick 20 in supply lines 22.Voltage improves the voltage amplifier 38 that unit 25 comprises NCP 1421 types, and the service voltage input BAT of this voltage amplifier 38 links to each other with supply lines 22 and the output OUT of this voltage amplifier 38 links to each other with outlet line 26.Output LX is returned by inductance coil 39 and is connected to supply lines 22, and this supply lines 22 is the output voltage of 3V by what tie point 36 provided energy feed unit 21.Coil 39 realizes voltage is brought up to the operating voltage of 5V by its inductance with the voltage amplifier 38 that is configured to switching regulaor, and this operating voltage is fed to electronic building brick 20 by outlet line 26 and tie point 37.
The loop line 40 that links to each other with ground GND with capacitor C120 with two other capacitor C124 and two other resistance R 121 of C125 and resistance R 123 and voltage divider 45 link to each other with ground GND with R122.The connection of voltage amplifier 38/shutoff terminal EN links to each other with loop line 40 by resistance R 123 and links to each other with ground GND by shunt capacitor C121.Reference voltage output REF links to each other with loop line 40 by capacitor C122.Ground connection output GND is applied on the ground GND.Feedback output end FB links to each other with outlet line 26 by capacitor C123.The voltage divider 45 that resistance R 121 and R122 constitute is connected between outlet line 26 and the loop line 40.Capacitor C123 is in parallel with resistance R 121.Voltage divider 45 be used for being adjusted to electronic building brick 20 outlet line 26 be the output voltage of 5V.
Because the inductance of coil 39 also can produce under failure condition than the obvious higher output voltage of the voltage of set 5V, so Power Limitation unit 27 is set, this Power Limitation unit 27 links to each other with tie point 37 to the outlet line 26 of electronic building brick 20 by Voltage Feedback circuit 28.Power Limitation unit 27 comprises the voltage detector 31 and 32 of two parallel connections, voltage detector 31 and 32 shutoff circuit 29 or 30 be inserted into supply lines 22 in switch element 23 or 24 link to each other.Voltage detector 31,32 is configured in the same manner and is described together hereinafter.
Each voltage detector 31,32 comprises its output OUT and turn-offs the STM1061 device 41,42 that circuit 29,30 links to each other.Voltage Feedback circuit 28 is by diode D105, D106 and comprise that the voltage divider 43,44 of resistance R 107, R124 or R108 and R109 is introduced to shutoff circuit 29,30.The mid point of voltage divider 43,44 links to each other with the working voltage input VCC of device 41,42 and links to each other with ground GND with ground connection input GND by capacitor C104, C107.Between diode D105, D106 and ground GND, insert other capacitor C104, C107.
The function class of STM1061 device 41,42 is similar to the comparator with internal reference source.Here employed reference voltage is 3.8V (STM1061-N38WX6F).Therefore, be provided with the voltage divider 43,44 that comprises resistance R 107, R124 or R108, R109, so that realize the threshold value of bigger 3.8V.Additionally, the resistance of voltage divider 43,44 as open the effective output of Lou low state (Open Drain Active-Low Output) on draw (Pull-up) resistance.The following size that is determined of the resistance of voltage divider 43,44: R107, R108=6.8K, and R109, R124=15K.Two switch elements 23,24 and reverse polarity protection's element 34 are built as from the p channel mosfet (IRLMS6802) that blocks.
The output voltage of voltage amplifier 38 must be limited on the maximum of 5.8V for the reason of the explosion safety of circuit arrangement.This utilizes voltage detector 31,32 and switch element 23,24 in the supply lines 22 to realize.If the output voltage of voltage amplifier 25 is on the threshold value that rises to voltage detector 31,32 on the tie point 37, then voltage detector 31,32 sends following output signal by turn-offing circuit 29,30: the supply lines 22 that this output signal is blocked associated switch element 23,24 and near voltage amplifier 38 interrupts.This causes the output voltage of voltage amplifier 38 to reduce again.
Avoid overvoltage for protective circuit device additionally, voltage detector 31,32 two parallel connections, work independently of one another is set.Thus, realized for explosion-proof required double safety at this circuit arrangement.The entire circuit device is poured into a mould in unshowned concrete form of implementation.
The Reference numeral tabulation
1 electronic building brick
2 energy are supplied with the unit
3 voltages improve the unit
4 outlet lines
5 resistance
6,7 circuits
8,9 Zener diodes
10 Power Limitation unit
20 electronic building bricks
21 energy feed units
22 supply lines
23,24 switch elements
25 voltages improve the unit
26 outlet lines
27 Power Limitation unit
28 Voltage Feedback circuits
29,30 turn-off circuit
31,32 voltage detectors
33 safety elements
34 reverse polarity protection's elements
35 ground paths
36,37 tie points
38 voltage amplifiers
39 inductance coils
40 loop lines
41,42 devices
43,44 voltage dividers
45 voltage dividers
Claims (according to the modification of the 19th of treaty)
1. circuit arrangement that is used for the electronic building brick at the security control signalling of motion detector that is used for the fireman or anti-contingency is carried out Power Limitation, it has the energy feed unit, voltage improves unit and Power Limitation unit, described Power Limitation unit is connected to voltage and improves on the outlet line between unit and the electronic building brick
It is characterized in that,
Power Limitation unit (27) has the voltage detector (31,32) of two work independently of one another, and be used for determining overvoltage and sending switching signal above under the situation of superpotential threshold value,
Be in series with two switch elements (23,24) in the supply lines (22) between energy feed unit (21) and voltage raising unit (25), and described two switch elements (23,24) respectively by turn-offing circuit (29,30) link to each other with voltage detector (31,32) respectively, and
Described switch element (23,24) is used for based on making in the switching signal that surpasses correspondent voltage detector (31,32) under the situation of superpotential threshold value the energy of this electronic building brick (20) being supplied with interruption.
2. circuit arrangement according to claim 1 is characterized in that, each voltage detector (31,32) has voltage divider (43,44) that is used to realize threshold value and the device (41,42) that has the internal reference source.
3. circuit arrangement according to claim 1 and 2 is characterized in that, is provided with reverse polarity protection's device (34) between energy feed unit (21) and switch element (23,24).
4. according to the described circuit arrangement of one of claim 1 to 3, it is characterized in that voltage detector (31; 32) be provided with STM1061 device (41; 42), and switch element (23,24) and reverse polarity protection's device (34) be built as from the p slot field-effect transistor (MOSFET) that blocks.
Claims (5)
1. circuit arrangement that is used for electronic building brick is carried out Power Limitation, it has the energy feed unit, voltage improves unit and Power Limitation unit, and described Power Limitation unit is connected on the outlet line between voltage amplification unit and the electronic building brick,
It is characterized in that,
Power Limitation unit (27) has at least one voltage detector (31,32), and be used for determining overvoltage and be used for sending switching signal surpassing under the situation of superpotential threshold value, and
Be provided with at least one switch element (23 in the supply lines (22) between energy feed unit (21) and voltage raising unit (25), 24), described at least one switch element is by turn-offing circuit (29,30) with described at least one voltage detector (31,32) link to each other, described at least one switch element (23,24) be used for the energy of electronic building brick (20) being supplied with interruption based on making in the switching signal that surpasses described at least one voltage detector (31,32) under the situation of superpotential threshold value.
2. circuit arrangement according to claim 1, it is characterized in that, Power Limitation unit (27) has two voltage detectors (31,32), and in the supply lines (22) between energy feed unit (21) and voltage raising unit (25) be in series with two switch elements (23,24), and described two switch elements (23,24) respectively link to each other with voltage detector (31,32) respectively by turn-offing circuit (29,30).
3. circuit arrangement according to claim 1 and 2 is characterized in that, each voltage detector (31,32) has voltage divider (43,44) that is used to realize threshold value and the device (41,42) that has the internal reference source.
4. circuit arrangement according to claim 1 and 2 is characterized in that, is provided with reverse polarity protection's device (34) between energy feed unit (21) and switch element (23,24).
5. according to the described circuit arrangement of one of claim 2 to 4, it is characterized in that voltage detector (31; 32) be provided with STM1061 device (41; 42), and switch element (23,24) and reverse polarity protection's device (34) be built as from the p slot field-effect transistor (MOSFET) that blocks.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200810035162 DE102008035162A1 (en) | 2008-07-28 | 2008-07-28 | Circuit arrangement for limiting the power of an electronic module |
| DE102008035162.8 | 2008-07-28 | ||
| PCT/EP2009/005445 WO2010012445A1 (en) | 2008-07-28 | 2009-07-28 | Circuitry for power limiting of an electronic assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102113199A true CN102113199A (en) | 2011-06-29 |
Family
ID=41264137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980129977.0A Withdrawn CN102113199A (en) | 2008-07-28 | 2009-07-28 | Circuitry for power limiting of electronic assembly |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2313962A1 (en) |
| CN (1) | CN102113199A (en) |
| DE (1) | DE102008035162A1 (en) |
| WO (1) | WO2010012445A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012018799A1 (en) * | 2012-09-22 | 2014-03-27 | Dräger Safety AG & Co. KGaA | A supply circuit in a head protection cover communication system, a head protection cover having such a supply circuit, and a method of operating such a supply circuit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3818273A (en) * | 1971-03-26 | 1974-06-18 | Yokogawa Electric Works Ltd | Barrier isolator device employing an overload protection circuit |
| JP3031649B2 (en) * | 1993-05-07 | 2000-04-10 | 三菱電機株式会社 | X-ray protector device |
| US5365420A (en) * | 1993-06-14 | 1994-11-15 | Scully Signal Company | High efficiency intrinsically safe power supply |
| DE10349282A1 (en) * | 2003-10-23 | 2005-05-25 | Hella Kgaa Hueck & Co. | Cross-polarity and overvoltage protection for d.c. circuit arrangement, e.g. for 5 volt sensors, has control arrangement that switches on switch in normal operation to connect first and second connectors of switch together |
| JP4704099B2 (en) * | 2004-05-21 | 2011-06-15 | ローム株式会社 | Power supply device and electronic device using the same |
| DE102004058540A1 (en) * | 2004-12-04 | 2006-06-08 | Bosch Rexroth Ag | Method and device for monitoring a voltage |
| JP2006311731A (en) * | 2005-04-28 | 2006-11-09 | Seiko Instruments Inc | Electronic circuit |
-
2008
- 2008-07-28 DE DE200810035162 patent/DE102008035162A1/en not_active Withdrawn
-
2009
- 2009-07-28 WO PCT/EP2009/005445 patent/WO2010012445A1/en active Application Filing
- 2009-07-28 EP EP09777478A patent/EP2313962A1/en not_active Withdrawn
- 2009-07-28 CN CN200980129977.0A patent/CN102113199A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010012445A1 (en) | 2010-02-04 |
| DE102008035162A1 (en) | 2010-02-11 |
| EP2313962A1 (en) | 2011-04-27 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Open date: 20110727 |