CN106160461A - A kind of functional safety power module - Google Patents
A kind of functional safety power module Download PDFInfo
- Publication number
- CN106160461A CN106160461A CN201610202582.0A CN201610202582A CN106160461A CN 106160461 A CN106160461 A CN 106160461A CN 201610202582 A CN201610202582 A CN 201610202582A CN 106160461 A CN106160461 A CN 106160461A
- Authority
- CN
- China
- Prior art keywords
- input
- voltage
- nmos switch
- monitoring
- power module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
- H02M3/072—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps adapted to generate an output voltage whose value is lower than the input voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
Disclosure one functional safety power module; the 24V of DC power converter V24C5T100BL of VICOR can be inputted by it, 5V output characteristics is monitored; ensureing that input terminal voltage is 19 30V and overcurrent protection value is 5A, output end voltage is 4.6 5.4V and overcurrent protection value is 10A.Comprising: EMC protection circuit; π type filter circuit; 24V input terminal voltage monitoring current-limiting protection unit; 24V inputs nmos switch, inputs storage capacitor, DC power converter V24C5T100BL; output filter unit; output storage capacitor, 5V output end voltage monitoring current-limiting protection unit, 5V exports nmos switch.
Description
Technical field
The invention belongs to the technical field of the product design of functional safety, particularly relate to a kind of functional safety power module,
The 24V input of DC power converter V24C5T100BL, the 5V output characteristics of VICOR is mainly monitored by it.
Background technology
In the product design of functional safety, very strict to the monitoring requirement of voltage x current in some occasions, not only want
Input voltage and input current is monitored, and output voltage electric current is monitored, and occur that voltage is abnormal or electric
Flow through protective measure to be had during stream.
The 24V input terminal voltage monitoring model that DC power converter V24C5T100BL itself that VICOR company manufactures carries
Enclosing relatively wide, for 18-36V, the magnitude of voltage of outfan 5V overvoltage protection is 6.25V, and overcurrent protection value is 23A, and these numerical value are all
Too big, and these monitoring and protection imperfection, do not reach the requirement in the functional safety source of IEC61508.
Summary of the invention
The technical problem to be solved in the present invention is the defect overcoming prior art, it is provided that a kind of functional safety power module,
The 24V of DC power converter V24C5T100BL of VICOR can be inputted by it, 5V output characteristics is monitored, it is ensured that input
Terminal voltage is 19-30V and overcurrent protection value is 5A, and output end voltage is 4.6-5.4V and overcurrent protection value is 10A.
The technical scheme solving the problems referred to above is: this functional safety power module, comprising: EMC protection circuit, π type
Filter circuit, 24V input terminal voltage monitoring current-limiting protection unit, 24V inputs nmos switch, inputs storage capacitor, DC source
Transducer V24C5T100BL, exports filter unit, exports storage capacitor, and 5V output end voltage monitoring current-limiting protection unit, 5V is defeated
Go out nmos switch；Input voltage passes sequentially through EMC protection circuit, π type filter circuit, 24V input nmos switch, input energy storage electricity
Appearance, DC power converter V24C5T100BL, output filter unit, output storage capacitor, 5V export nmos switch, and π type filters
The outfan of circuit connects 24V input terminal voltage monitoring current-limiting protection unit, 24V input terminal voltage monitoring current-limiting protection unit
Outfan connects 24V and inputs nmos switch, and the outfan of DC power converter V24C5T100BL connects 5V output end voltage prison
Control current-limiting protection unit, the outfan of 5V output end voltage monitoring current-limiting protection unit connects 5V and exports nmos switch.
The present invention in use, protected by 24V input terminal voltage monitoring current limliting by the magnitude of voltage of 24V input overvoltage monitoring overvoltage
Protect unit and determine whether overvoltage, when the magnitude of voltage of input can detect more than 30V, 24V input terminal voltage monitoring current-limiting protection unit
To this situation, produce a high level at 24V input terminal voltage monitoring current-limiting protection unit, disconnect 24V and input nmos switch；
The magnitude of voltage that monitoring that 24V input is under-voltage is under-voltage is determined whether under-voltage, when defeated by 24V input terminal voltage monitoring current-limiting protection unit
The magnitude of voltage entered detects this situation, at 24V input terminal voltage less than 19V, 24V input terminal voltage monitoring current-limiting protection unit
Monitoring current-limiting protection unit produces a high level, disconnects 24V and inputs nmos switch；Input overcurrent protection, when 24V input electricity
When pressure monitoring current-limiting protection unit detects the pressure drop of 50mV, it is believed that be over-current phenomenon avoidance, will be switched off 24V and input nmos switch；5V
Outfan overvoltage monitoring is determined by 5V output end voltage monitoring current-limiting protection unit, when the magnitude of voltage of output is defeated more than 5.4V, 5V
Go out terminal voltage monitoring current-limiting protection unit and this situation detected, produce one at 5V output end voltage monitoring current-limiting protection unit
High level, disconnects 5V and exports nmos switch；Monitoring that 5V outfan is under-voltage, 5V outfan overvoltage monitoring is monitored by 5V output end voltage
Current-limiting protection unit determines, when the magnitude of voltage of output detects this less than 4.6V, 5V output end voltage monitoring current-limiting protection unit
The situation of kind, produces a high level at 5V output end voltage monitoring current-limiting protection unit, disconnects 5V and export nmos switch, after protection
Continuous circuit；Output overcurrent is protected, when 5V output end voltage monitoring current-limiting protection unit detects the pressure drop of 50mV, it is believed that be
Flow phenomenon, disconnects 5V and exports nmos switch；Therefore this functional safety power module can be to the DC power converter of VICOR
The 24V input of V24C5T100BL, 5V output characteristics are monitored, it is ensured that input terminal voltage is 19-30V and overcurrent protection value is
5A, output end voltage is 4.6-5.4V and overcurrent protection value is 10A.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the functional safety power module of the present invention.
Fig. 2 is the 24V input monitoring schematic diagram of the present invention.
Fig. 3 is the 5V outfan monitoring schematic diagram of the present invention.
Detailed description of the invention
As it is shown in figure 1, this functional safety power module, comprising: EMC protection circuit, π type filter circuit, 24V inputs
Terminal voltage monitoring current-limiting protection unit, 24V inputs nmos switch, inputs storage capacitor, DC power converter
V24C5T100BL, exports filter unit, exports storage capacitor, and 5V output end voltage monitoring current-limiting protection unit, 5V exports NMOS
Switch；Input voltage passes sequentially through EMC protection circuit, π type filter circuit, 24V input nmos switch, input storage capacitor, straight
Stream power supply changeover device V24C5T100BL, output filter unit, output storage capacitor, 5V export nmos switch, π type filter circuit
Outfan connect 24V input terminal voltage monitoring current-limiting protection unit, 24V input terminal voltage monitoring current-limiting protection unit output
End connects 24V and inputs nmos switch, and the outfan of DC power converter V24C5T100BL connects 5V output end voltage monitoring limit
Stream protected location, the outfan of 5V output end voltage monitoring current-limiting protection unit connects 5V and exports nmos switch.
The present invention in use, protected by 24V input terminal voltage monitoring current limliting by the magnitude of voltage of 24V input overvoltage monitoring overvoltage
Protect unit and determine whether overvoltage, when the magnitude of voltage of input can detect more than 30V, 24V input terminal voltage monitoring current-limiting protection unit
To this situation, produce a high level at 24V input terminal voltage monitoring current-limiting protection unit, disconnect 24V and input nmos switch；
The magnitude of voltage that monitoring that 24V input is under-voltage is under-voltage is determined whether under-voltage, when defeated by 24V input terminal voltage monitoring current-limiting protection unit
The magnitude of voltage entered detects this situation, at 24V input terminal voltage less than 19V, 24V input terminal voltage monitoring current-limiting protection unit
Monitoring current-limiting protection unit produces a high level, disconnects 24V and inputs nmos switch；Input overcurrent protection, when 24V input electricity
When pressure monitoring current-limiting protection unit detects the pressure drop of 50mV, it is believed that be over-current phenomenon avoidance, will be switched off 24V and input nmos switch；5V
Outfan overvoltage monitoring is determined by 5V output end voltage monitoring current-limiting protection unit, when the magnitude of voltage of output is defeated more than 5.4V, 5V
Go out terminal voltage monitoring current-limiting protection unit and this situation detected, produce one at 5V output end voltage monitoring current-limiting protection unit
High level, disconnects 5V and exports nmos switch；Monitoring that 5V outfan is under-voltage, 5V outfan overvoltage monitoring is monitored by 5V output end voltage
Current-limiting protection unit determines, when the magnitude of voltage of output detects this less than 4.6V, 5V output end voltage monitoring current-limiting protection unit
The situation of kind, produces a high level at 5V output end voltage monitoring current-limiting protection unit, disconnects 5V and export nmos switch, after protection
Continuous circuit；Output overcurrent is protected, when 5V output end voltage monitoring current-limiting protection unit detects the pressure drop of 50mV, it is believed that be
Flow phenomenon, disconnects 5V and exports nmos switch；Therefore this functional safety power module can be to the DC power converter of VICOR
The 24V input of V24C5T100BL, 5V output characteristics are monitored, it is ensured that input terminal voltage is 19-30V and overcurrent protection value is
5A, output end voltage is 4.6-5.4V and overcurrent protection value is 10A.
It addition, this functional safety power module also includes connecing protecting field circuit.
It addition, described 24V input terminal voltage monitoring current-limiting protection unit is LTC4364 surge suppressor, when LTC4364 examines
The input voltage 24V measuring outside does not crosses stream in the scope of monitoring or input current, and the grid at LTC4364 controls pin and produces
A raw high level, disconnects the 24V being attached thereto and inputs nmos switch, makes the input voltage 24V of V24C5T100BL disconnect and not enter
Enter the input to V24C5T100BL；Described 5V output end voltage monitoring current-limiting protection unit is LTC4231 surge suppressor,
When LTC4231 detects that output voltage 5V not in the scope of monitoring or exports overcurrent, and the grid at LTC4231 controls to draw
Foot produces a high level, disconnects the 5V output nmos switch being attached thereto and makes 5V voltage to export.
It addition, described 24V input nmos switch is model is the NMOS tube of FDB3632, described 5V output nmos switch is
Model is the NMOS tube of SI4126DY.
It addition, the voltage range of 24V input monitoring is 19V-30V, by controlling the value of voltage acquisition resistance.
It addition, input overcurrent turn-off function value is 5A, by crossing the value of flow monitoring resistance.
It addition, the voltage range of 5V outfan monitoring is 4.6V-5.4V, by controlling the value of voltage acquisition resistance
System.
It addition, outfan overcurrent turn-off function value is 10A, by crossing the value of flow monitoring resistance.
The present invention is described more thoroughly below.
As in figure 2 it is shown, 24V input overvoltage monitoring, after EMC protection and π type filter, enter 24V voltage monitoring, mistake
The magnitude of voltage of pressure is determined by LTC4364 and the 4th resistance R4, the 6th resistance R6, the 8th resistance R8, by the 9 foot collections of LTC4364
Voltage determines whether overvoltage, when the magnitude of voltage inputted the 9th foot more than 30V, LTC4364 can detect this situation, at the 5th foot
A high level can be produced, disconnect NMOS tube FDB3632 (Q1).Monitoring that 24V input is under-voltage, filters it in EMC protection and π type
After, entering 24V voltage monitoring, under-voltage magnitude of voltage is by LTC4364 and the 4th resistance R4, the 6th resistance R6, and the 8th resistance R8 is true
Fixed, 8 feet of LTC4364 gather voltage and determine whether under-voltage, when the magnitude of voltage of input is less than the 8th foot meeting of 19V, LTC4364
This situation detected, a high level can be produced at the 5th foot, disconnect NMOS tube FDB3632 (Q1).Input overcurrent protection, logical
Crossing the voltage that detection is flow through on R1, when flowing through the voltage of R1 more than 50mV, electric current reaches 5A, when LTC4364 detects 50mV
Pressure drop time, be taken as over-current phenomenon avoidance, will be switched off NMOS tube FDB3632 (Q1).
As it is shown on figure 3,5V outfan overvoltage monitoring, 5V outfan overvoltage monitoring by LTC4231 and the 17th resistance R17,
19th resistance R19, the 20th resistance R20, the 21st resistance R21 determine, when the magnitude of voltage of output is more than 5.4V,
4th foot of LTC4231 can detect this situation, can produce a high level at the 10th foot, disconnects NMOS tube SI4126DY
(U3).Monitoring that 5V outfan is under-voltage, 5V outfan overvoltage monitoring by LTC4231 and the 17th resistance R17, the 19th resistance R19,
20th resistance R20, the 21st resistance R21 determine, when the magnitude of voltage of output is less than the 2nd and 3 foot meetings of 4.6V, LTC4231
This situation detected, a high level can be produced at the 10th foot, disconnect NMOS tube SI4126DY (U3), protect subsequent conditioning circuit.
Output overcurrent is protected, and is flow through the voltage on R15 by detection, and when flowing through the voltage of R15 more than 50mV, electric current reaches 10A, when
When LTC4231 detects the pressure drop of 50mV, it is taken as over-current phenomenon avoidance, disconnects NMOS tube SI4126DY (U3).
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any pro forma restriction.This area
Those of ordinary skill it should be understood that every technical spirit according to the present invention any simply repairing that above example is made
Change, equivalent variations and modification, the most still belong to the protection domain of technical solution of the present invention.
Claims (8)
1. a functional safety power module, it is characterised in that: comprising: EMC protection circuit, π type filter circuit, 24V inputs
Terminal voltage monitoring current-limiting protection unit, 24V inputs nmos switch, inputs storage capacitor, DC power converter
V24C5T100BL, exports filter unit, exports storage capacitor, and 5V output end voltage monitoring current-limiting protection unit, 5V exports NMOS
Switch；Input voltage passes sequentially through EMC protection circuit, π type filter circuit, 24V input nmos switch, input storage capacitor, straight
Stream power supply changeover device V24C5T100BL, output filter unit, output storage capacitor, 5V export nmos switch, π type filter circuit
Outfan connect 24V input terminal voltage monitoring current-limiting protection unit, 24V input terminal voltage monitoring current-limiting protection unit output
End connects 24V and inputs nmos switch, and the outfan of DC power converter V24C5T100BL connects 5V output end voltage monitoring limit
Stream protected location, the outfan of 5V output end voltage monitoring current-limiting protection unit connects 5V and exports nmos switch.
Functional safety power module the most according to claim 1, it is characterised in that: this functional safety power module also includes
Connect protecting field circuit.
Functional safety power module the most according to claim 2, it is characterised in that: described 24V input terminal voltage monitoring limit
Stream protected location is LTC4364 surge suppressor, when LTC4364 detects that the input voltage 24V of outside is not in the scope of monitoring
Or input current crosses stream, the grid at LTC4364 controls pin and produces a high level, disconnects the 24V input being attached thereto
Nmos switch, makes the input voltage 24V of V24C5T100BL disconnect and not enter into the input of V24C5T100BL；Described 5V is defeated
Going out terminal voltage monitoring current-limiting protection unit is LTC4231 surge suppressor, when LTC4231 detects that output voltage 5V is not in monitoring
Scope or output overcurrent, the grid at LTC4231 controls pin and produces a high level, disconnects the 5V being attached thereto defeated
Go out nmos switch and make 5V voltage to export.
Functional safety power module the most according to claim 3, it is characterised in that: described 24V input nmos switch is type
Number be the NMOS tube of FDB3632, described 5V output nmos switch be model be the NMOS tube of SI4126DY.
Functional safety power module the most according to claim 4, it is characterised in that: the voltage range of 24V input monitoring
For 19V-30V, by the value of voltage acquisition resistance is controlled.
Functional safety power module the most according to claim 5, it is characterised in that: input overcurrent turn-off function value is 5A, logical
The value of flow monitoring resistance.
Functional safety power module the most according to claim 6, it is characterised in that: the voltage range of 5V outfan monitoring is
4.6V-5.4V, by controlling the value of voltage acquisition resistance.
Functional safety power module the most according to claim 7, it is characterised in that: outfan overcurrent turn-off function value is 10A, logical
The value of flow monitoring resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610202582.0A CN106160461A (en) | 2016-04-01 | 2016-04-01 | A kind of functional safety power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610202582.0A CN106160461A (en) | 2016-04-01 | 2016-04-01 | A kind of functional safety power module |
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| Publication Number | Publication Date |
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| CN106160461A true CN106160461A (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610202582.0A Pending CN106160461A (en) | 2016-04-01 | 2016-04-01 | A kind of functional safety power module |
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