DTL35A-LC [MURATA]
Analog Circuit, PACKAGE-9;
| 型号： | DTL35A-LC |
| 厂家： | 
muRata |
| 描述： | Analog Circuit, PACKAGE-9 |
| 文件： | 总4页 (文件大小：268K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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6OLTAGEꢀ#ONTROLLEDꢁ ꢂ !MP
ꢃꢄꢄ 7ATTꢁ ,OWꢀ#OMPLIANCE
%LECTRONIC ,OADS
OBSOLETE PRODUCT
4HE $4,ꢀꢁ!ꢂ,# IS AN ISOLATED ꢃꢁꢄꢄ6DCꢅꢆ NEARꢂIDEAL ꢃ:). ꢇ ꢈꢇ ꢉ-7ꢅꢆ ANALOGꢊVOLTAGEꢂCONTROLLED
CURRENT SINKꢋ )TgS ꢄꢂꢁ! OUPUTꢊLOAD CURRENT IS STRAIGHTFORWARDLY ꢌPROGRAMMEDꢌ BY APPLYING A ꢄꢂꢍꢄ6
INPUTꢋ 4HE CONTROL SIGNAL CAN BE GENERATED BY CIRCUITS AS SIMPLE AS THE WIPER OF A TRIMPOT OR AS
SOPHISTICATED AS PROGRAMMABLE LOGIC CONTROLLERS ꢃ0,#gSꢅ OR ANALOGꢂOUTPUT COMPUTER )ꢊ/ BOARDS ꢃ$ꢊ!
BOARDSꢅꢋ 4HE $4,ꢀꢁ!ꢂ,# SUPPORTS ANY COMBINATION OF )/54 ꢇ ꢄꢂꢁ !MPS AND 6/54 ꢇ ꢄꢋꢎꢂꢀꢄ 6OLTSꢋ
)TS THERMALLY EFlCIENTꢆ METAL PACKAGEꢆ WHEN PROPERLY HEAT SUNKꢆ CAN DISSIPATE OUTPUTꢊLOAD POWER UP
TO ꢍꢄꢄ 7ATTSꢋ
&EATURES
ꢀꢁꢂꢀ6 )NPUTꢃCONTROL VOLTAGE
N
N
ꢀꢁꢄ! OUTPUTꢃLOAD CURRENT
N
ꢀꢅꢆꢁꢇꢀ6 OUTPUT COMPLIANCE VOLTAGE
N
ꢀꢁꢂꢀꢀ7 OUTPUTꢃLOAD POWER
N
ꢈ-7 )NPUT )MPEDANCE
ꢄꢀꢀ6DC )SOLATION
N
4HE EASYꢂTOꢂUSE $4,ꢀꢁ!ꢂ,# IS AN EXCELLENT BUILDING BLOCK FOR LOWꢂCOSTꢆ FULLY mEXIBLEꢆ
POWERꢂSUPPLY ꢃ!#ꢊ$# OR $#ꢊ$#ꢅ OR POWERꢂCOMPONENT ꢃ-/3&%4gSꢆ DIODESꢆ ETCꢋꢅ TEST AND BURNꢂIN
APPLICATIONSꢋ )T IS ACCURATE ꢃ¢ꢁM! OFFSET ERRORꢆ ¢ꢍꢏ OVERALL ACCURACYꢅꢆ FAST ꢃꢐꢄꢄ«SEC FULLꢂSCALE STEP
RESPONSEꢅꢆ AND CAPABLE OF IMPRESSIVE RESOLUTIONꢋ )F IT IS CONTROLLED WITH A ꢍꢐꢂBITꢆ ꢄꢂꢍꢄ6 $ꢊ! CONVERTERꢆ
FOR EXAMPLEꢆ ONE ,3" ꢃLEAST SIGNIlCANT BITꢅ OF THE $ꢊ! CORRESPONDS TO A ꢍꢋꢐꢁM! CHANGE IN THE
$4,ꢀꢁ!ꢂ,#gS OUTPUTꢊLOAD CURRENTꢋ
N
ꢂꢉ ACCURACY UNDER ALL CONDITIONS
N
ꢊꢀꢀSEC FULLꢁSCALE STEP RESPONSE
N
ꢊꢋ X ꢊꢋꢌ OPENꢁFRAME WITH BASEPLATE
PACKAGE
N
/PERATE IN PARALLEL FOR HIGHER POWER
4HE $4,ꢀꢁ!ꢂ,# IS PACKAGED IN A SMALL ꢃꢐꢌ X ꢐꢌ X ꢄꢋꢁꢌꢅꢆ THERMALLY EFlCIENT OPENꢂFRAME PACKAGE
INCORPORATING AN ALUMINUM BASEPLATE WITH THROUGHꢂHOLE MOUNTING INSERTSꢋ )T IS POWERED BY A SINGLE
ꢑꢁ6 SUPPLY AND DRAWS A MERE ꢍꢁꢄM!ꢋ
!PPLICATIONS
0OWERꢁSUPPLY TEST AND CHARACTERIZATION
N
4HE $4,ꢀꢁ!ꢂ,# HAS AN OUTPUT COMPLIANCE VOLTAGE OF ꢄꢋꢎꢂꢀꢄ 6OLTSꢋ 3HOULD THE OUTPUTꢊLOAD
VOLTAGE DROP BELOW THE ꢄꢋꢎ6 REQUIRED FOR PROPER BIASINGꢆ AN INTERNAL MONITORING CIRCUIT ACTIVATES THE
$4,ꢀꢁ!ꢂ,#gS OUTPUT &AULT LINEꢋ
N
3TATICꢃDYNAMIC POWERꢁSUPPLY BURNꢁIN
0OWERꢁRESISTOR SUBSTITUTION
2EALꢁTIME LOAD SIMULATION
N
N
4HE $4,ꢀꢁ!ꢂ,# AND OTHER ELECTRONIC LOADSꢆ CONTROLLER BOARDSꢆ AND SOFTWARE FROM $!4%,
ARE OUTSTANDING BUILDINGꢂBLOCK COMPONENTS FOR POWERꢂSUPPLY BURNꢂIN AND TEST SYSTEMSꢋ 4HEY ARE
EXTREMELY RELIABLEꢆ COSTꢂEFFECTIVE SOLUTIONS THAT ENABLE YOU TO QUICKLY CONlGURE IMPRESSIVELY ACCURATE
SYSTEMSꢋ
N
#APACITOR DISCHARGE TESTING
&IGURE ꢀꢁ 3IMPLIlED 3CHEMATIC
ꢏꢂꢂ 7!44ꢀ 6/,4!'%ꢌ#/.42/,,%$ %,%#42/.)# ,/!$
ꢀ/ꢁÊ-iÀiÃ
0ERFORMANCE 3PECIlCATIONS AND /RDERING 'UIDE
/UTPUT
/UTPUT
)NPUT
#ONTROL
6OLTAGE
ꢍ6OLTSꢎ
)NPUT
)MPEDANCE
ꢍ-INIMUMꢎ
ꢇ-7
#OMPLIANCE
#URRENT
ꢍ!MPSꢎ
ꢄꢀꢂꢈꢄ
2ESOLUTION
6OLTAGE
0OWER
ꢍ7ATTSꢎ
ꢄꢀꢃꢄꢄ
0ACKAGE
ꢍ#ASEꢌ 0INOUTꢎ
#ꢉꢇ"ꢁ 0ꢂꢃ
y
z
ꢍ6OLTSꢎ
-ODEL
$4,ꢅꢂ!ꢀ,#
ꢍM!ꢎ
ꢄ TO ꢆꢃꢄ6
ꢃꢈꢉꢂ
ꢄꢈꢊꢀꢅꢄ
4YPICAL AT 4! ꢇ ꢑꢐꢁª# WITH NOMINAL ꢑꢁ6 SUPPLY VOLTAGEꢆ UNLESS NOTEDꢋ
,ISTED RESOLUTION ꢃꢍꢋꢐꢁM!ꢅ IS FOR A TYPICAL APPLICATION IN WHICH THE $4,ꢀꢁ!ꢂ,# IS CONTROLLED BY A VOLTAGE
GENERATED BY A ꢍꢐꢂBIT $ꢊ! CONVERTER WITH A ꢄꢂꢍꢄ6 OUTPUT RANGEꢋ /NE ,3" ꢃLEAST SIGNIlCANT BITꢅ OF THE $ꢊ!
CORRESPONDS TO ꢄꢋꢄꢐꢉꢉꢏ ꢃꢍꢊꢉꢄꢔꢎꢅ OF FULL SCALE ꢃꢁꢋꢄ !MPSꢅꢆ WHICH EQUALS APPROXIMATELY ꢍꢋꢐꢁM!ꢋ
&OR PROPER OPERATIONꢆ THE UNITgS OUTPUTꢊLOAD VOLTAGE MUST REMAIN WITHIN THIS RANGEꢋ 6OLTAGES GREATER THAN THE LISTED
MAXIMUM CAN DAMAGE THE DEVICEꢋ 6OLTAGES LESS THAN THE MINIMUM PROVIDE INSUFlCIENT BIAS FOR THE OUTPUT STAGE AND WILL
RESULT IN UNPREDICTABLE OR NO OPERATIONꢋ 3EE /UTPUT #OMPLIANCE 6OLTAGE AND THE &AULT ,INE FOR DETAILSꢋ
0!24 .5-"%2 3425#452%
-%#(!.) #!, 30%#) &) #!4) /.3
$4, ꢂꢂ! ꢂꢂ!
ꢂꢂ!
ꢈ,#
$4,
ꢆꢇ
!
$!4%,
%LECTRONIC ,OAD
,OW #OMPLIANCE
6OLTAGE
6OLTAGE 2ANGE
!ꢁ3ERIES
ꢀꢁ ꢇ ꢄꢋꢎ TO ꢀꢄ6
(IGH 2ELIABILITY
4%-0%2!452% $%2!4).'
)ꢃ/ #ONNECTIONS
0IN
ꢍ
&UNCTION 0ꢄꢂ
ꢑꢁ 6OLT 3UPPLY
ꢑꢁ 6OLT 2ETURN
0IN
ꢎ
&UNCTION 0ꢄꢂ
ꢂ,OAD
ꢂ,OAD
ꢑ,OAD
ꢑ,OAD
ꢐ
ꢒ
"ASEPLATE4EMPERATURE ꢍ #ꢎ
ꢀ
&AULT
ꢓ
ꢉ
#ONTROL 6OLTAGE )N ꢃꢑꢅ
#ONTROL 6OLTAGE )N ꢃꢂꢅ
ꢔ
4HE HORIZONTAL AXIS OF THE ABOVE CHART REFERENCES THE TEMPERATURE OF THE $4,ꢀꢁ!ꢂ,#gS
ALUMINUM BASEPLATEꢋ 4HE DEVICE CAN CONTINUALLY DISSIPATE UP TO ꢍꢄꢄ 7ATTS IF THE BASEPLATE
IS MAINTAINED AT OR BELOW ꢑꢁꢄª#ꢋ !T ꢑꢐꢁª# AMBIENT TEMPERATUREꢆ WITH NO HEAT SINK OR
SUPPLEMENATAL AIR mOWꢆ THE $4,ꢀꢁ!ꢂ,# CAN RELIABLY DISSIPATE A CONTINUOUS ꢍꢄ 7ATTSꢋ
ꢁ
#ONTACT $!4%, FOR (EAT 3INK INFORMATIONꢋ
ꢃ
ꢀ/ꢁÎxꢂꢁꢃ
ꢏꢂꢂ 7!44ꢀ 6/,4!'%ꢌ#/.42/,,%$ %,%#42/.)# ,/!$
0ERFORMANCEꢃ&UNCTIONAL 3PECIlCATIONS
4YPICAL 4 ꢇ ꢑꢐꢁª# WITH NOMINAL ꢑꢁ6 SUPPLY VOLTAGEꢆ UNLESS NOTEDꢋ
!
,ISTED RESOLUTION ꢃꢍꢋꢐꢁM!ꢅ IS FOR A TYPICAL APPLICATION IN WHICH THE $4,ꢀꢁ!ꢂ,# IS CONTROLLED BY
A VOLTAGE GENERATED BY A ꢍꢐꢂBIT $ꢊ! CONVERTER WITH A ꢄꢂꢍꢄ6 OUTPUT RANGEꢋ /NE ,3" ꢃLEAST
SIGNIlCANT BITꢅ OF THE $ꢊ! CORRESPONDS TO ꢄꢋꢄꢐꢉꢉꢏ ꢃꢍꢊꢉꢄꢔꢎꢅ OF FULL SCALE ꢃꢁꢋꢄ !MPSꢅꢆ WHICH
EQUALS APPROXIMATELY ꢍꢋꢐꢁM!ꢋ
)NPUT
#ONTROL 6OLTAGE
)MPEDANCE
ꢄꢂꢍꢄ 6OLTS
ꢉ -7ꢆ MINIMUM
/FFSET ERROR IS DElNED AS THE CURRENT SUNKꢊSOURCED BY THE $4,ꢀꢁ!ꢂ,#gS OUTPUTꢆ UNDER ANY
OUTPUTꢂVOLTAGE CONDITIONSꢆ WHEN THE APPLIED CONTROL VOLTAGE IS ꢄ 6OLTSꢋ
/UTPUT
!PPLIES OVER ALL RANGESꢊCOMBINATIONS OF SPECIlED OUTPUT CURRENTꢆ LOAD VOLTAGEꢆ OUTPUT POWERꢆ
4RANSFER &UNCTION
)/54 ꢃ!MPSꢅ ꢇ ꢄꢋꢁ 6). ꢃ6OLTSꢅ
OPERATING TEMPERATURE AND 6##
ꢋ
&OR PROPER OPERATIONꢆ THE $4,ꢀꢁ!ꢂ,#gS OUTPUT VOLTAGE MUST REMAIN WITHIN THE RANGE LISTEDꢋ
6OLTAGES GREATER THAN THE LISTED MAXIMUM CAN DAMAGE THE DEVICEꢋ 6OLTAGES LESS THAN THE
LISTED MINIMUM PROVIDE INSUFlCIENT BIAS FOR THE OUTPUT STAGE AND WILL RESULT IN UNPREDICTABLE OR
NO OPERATIONꢋ 3EE /UTPUT #OMPLIANCE 6OLTAGE AND &AULT ,INE FOR DETAILSꢋ
4HE $4,ꢀꢁ!ꢂ,# CAN ACHIEVE ITS MAXIMUM OUTPUTꢊLOAD POWER ONLY WHEN ITS BASEPLATE
TEMPERATURE IS PROPERLY MAINTAINEDꢋ 3EE 4EMPERATURE $ERATINGꢋ
} 3PECIlED FOR THE FULLꢂSCALE STEP FROM ꢍꢄM! TO ꢁꢋꢄ !MPS SETTLING TO ¢ꢐꢏ ꢃ¢ꢍꢄꢄM!ꢅ OF lNAL
VALUEꢋ ! MINIMAL LOADING OF ꢍꢄM! IS RECOMMENDED TO ACHIEVE THE FASTEST DYNAMIC RESPONSEꢋ
~ "ASEPLATE TEMPERATUREꢋ 3EE .OTE ꢁ AND 4EMPERATURE $ERATINGꢋ
#URRENTꢏ
2ANGE
ꢄꢂꢁꢋꢄ !MPS
x
2ESOLUTION
/FFSET %RROR
'AIN %RROR
!BSOLUTE !CCURACY
ꢄꢋꢄꢐꢁꢏ&3 ꢃꢍꢋꢐꢁ M!ꢅ
¢ꢁ M!
¢ꢍꢏꢆ MAXIMUM
y
z
¢ꢍꢏꢆ MAXIMUM
{
6OLTAGE
ꢄꢋꢎꢂꢀꢄ 6OLTS
ꢄꢂꢍꢄꢄ 7ATTS
|
0OWER
!BSOLUTE -AXIMUM 2ATINGS
)SOLATION 6OLTAGEꢏ
!NALOG )NPUT TO ¢ ,OAD
ꢑꢁ6 0OWER TO )NPUT OR ¢ ,OAD
!NY PIN TO CASE
ꢁꢄꢄ6DCꢆ MINIMUM
ꢁꢄꢄ6DCꢆ MINIMUM
ꢁꢄꢄ6DCꢆ MINIMUM
0OWER 3UPPLY 6OLTAGE ꢌꢆ6CCꢁ 0IN ꢃꢍ
#ONTROL 6OLTAGE )N ꢌ0IN ꢇꢍ
ꢀꢄꢈꢂ TO ꢆꢂꢈꢂ 6OLTS
ꢀꢄꢈꢂ TO ꢆꢃꢂ 6OLTS
.O PROTECTION
.O PROTECTION
9ES ꢌ3EE &AULT ,INEꢍ
ꢆꢎꢂ #
/UTPUT 2EVERSEꢁ0OLARITY 0ROTECTION
/UTPUT /VERVOLTAGE 0ROTECTION
/UTPUT 5NDERVOLTAGE 0ROTECTION
#ASE4EMPERATURE
)SOLATION 2ESISTANCE
&AULT ,OGIC ,EVELSꢏ
,OGIC ꢋꢃꢋ ꢌ ꢃꢂꢄ!ꢍ
,OGIC ꢋꢄꢋ ꢌ ꢃꢈꢊ M!ꢍ
ꢍꢄꢄ-7ꢀ MINIMUM
ꢑꢀꢋꢁ 6OLTSꢆ MINIMUM
ꢑꢄꢋꢉ 6OLTSꢆ MAXIMUM
3TORAGE4EMPERATURE
nꢇꢄ TO ꢆꢎꢂ #
ꢆꢅꢄꢄ #
$YNAMIC 0ERFORMANCE
,EAD4EMPERATURE ꢌSOLDERINGꢁ ꢃꢄ SECꢈꢍ
/UTPUT 3LEW 2ATEꢏ
ꢄꢋꢉ !ꢊ«SECꢆ MINIMUM
4HESE ARE STRESS RATINGSꢋ %XPOSURE OF DEVICES TO ANY OF THESE CONDITIONS MAY ADVERSELY AFFECT LONGꢂTERM
RELIABILITYꢋ 0ROPER OPERATION UNDER CONDITIONS OTHER THAN THOSE LISTED IN THE 0ERFORMANCEꢊ&UNCTIONAL
3PECIlCATIONS 4ABLE IS NOT IMPLIEDꢋ
/UTPUT 3ETTLING4IME }
ꢐꢄꢄ «SEC
$YNAMIC ,OADINGꢏ }
ꢍꢄM! TO ꢁꢋꢄ!
ꢄ TO ꢁꢋꢄ!
ꢁ K(Z
ꢍ K(Z
4%#(.)#!, ./4%3
0OWER 2EQUIREMENTS
0OWER 3UPPLY 2ANGE ꢃꢑ6CCꢆ 0INꢍꢅ
0OWER 3UPPLY #URRENT }
ꢑꢉꢋꢒꢁꢂꢁꢋꢐꢁ 6OLTS ꢃꢑꢁ6 NOMINALꢅ
ꢍꢍꢄM! TYPꢋꢆ ꢍꢁꢄM! MAXꢋ
/VERVIEW
4HE $4,ꢀꢁ!ꢂ,# IS AN ANALOG PROGRAMMABLE ꢃꢄ TO ꢑꢍꢄ6 CONTROLꢅ CURRENT SINKꢋ )TS
OUTPUTꢊLOAD CURRENT RANGE IS ꢄ TO ꢁꢋꢄ !MPS OVER A COMPLIANCE VOLTAGE RANGE OF
ꢄꢋꢎ TO ꢀꢄ 6OLTS AND AN OUTPUTꢊLOAD POWER RANGE OF ꢄ TO ꢍꢄꢄ 7ATTSꢋ 4HE DEVICEgS
TRANSFER FUNCTION IS AS FOLLOWSꢖ
%NVIRONMENTAL
/PERATING4EMPERATURE~
3TORAGE4EMPERATURE
ꢂꢐꢁ TO ꢑꢒꢄª#
ꢂꢉꢄ TO ꢑꢓꢁª#
TO ꢔꢁꢏ
(UMIDITY ꢍ.ONꢁCONDENSINGꢎ
!LTITUDE !BOVE 3EA ,EVEL
/PERATING4EM
ꢍꢄꢆꢄꢄꢄ FEET
)OUT ꢃ!MPSꢅ ꢇ ꢄꢋꢁ6). ꢃ6OLTSꢅ
0HYSICAL
%XAMPLESꢖ #ONTROL 6). ꢇ ꢍ 6OLTꢆ )/54 ꢇ ꢄꢋꢁ !MPS
#ONTROL 6). ꢇ ꢍꢄ 6OLTSꢆ )/54 ꢇ ꢁꢋꢄ !MPS
$IMENSIONS
ꢐꢌ X ꢐꢌ X ꢄꢋꢁꢌ ꢃꢁꢍ X ꢁꢍ X ꢍꢐꢋꢒ MMꢅ
#ASE -ATERIAL
/PENꢂFRAME CONSTRUCTION WITH
ALUMINUM BASEPLATE
)N A TYPICAL POWERꢂSUPPLY TEST OR BURNꢂIN APPLICATIONꢆ THE OUTPUT PINS OF THE
DEVICE UNDER TEST ꢃ$54ꢅ ARE CONNECTED TO THE $4,ꢀꢁ!ꢂ,#gS ꢑ,OAD ꢃPINS ꢍꢄ AND
ꢍꢍꢅ AND ꢂ,OAD ꢃPINS ꢓ AND ꢔꢅ OUTPUTSꢋ
0IN -ATERIAL
-OUNTING (OLES
7EIGHT
"RASSꢆ SOLDER COATED
4HROUGHꢂHOLE SPACERSꢆ ꢕꢉꢂꢉꢄ CLEARANCE
ꢍꢋꢔ OUNCES ꢃꢁꢉ GRAMSꢅ
ꢅ
ꢏꢂꢂ 7!44ꢀ 6/,4!'%ꢌ#/.42/,,%$ %,%#42/.)# ,/!$
ꢀ/ꢁÊ-iÀiÃ
4%#(.)#!, ./4%3
/UTPUT #OMPLIANCE 6OLTAGE AND THE &AULT ,INE
4HERMAL #ONSIDERATIONS
&OR PROPER OPERATIONꢆ THE $4,ꢀꢁ!ꢂ,#gS OUTPUTꢊLOAD VOLTAGE MUST ALWAYS BE
BETWEEN ꢄꢋꢎ AND ꢀꢄ 6OLTSꢋ 4HE DEVICE CANNOT BE USED TO DIRECTLY LOAD EXTREMELY
LOW VOLTAGES ꢃSUCH AS ꢄꢋꢁ6ꢅ POWER COMPONENTS OR TO SIMULATE A TRUE SHORT
CIRCUIT ꢃꢄ 6OLTSꢅꢋ 6OLTAGES GREATER THAN ꢀꢄ6 CAN DAMAGE THE DEVICEꢋ 6OLTAGES
ꢗ ꢄꢋꢎ6 WILL RESULT IN INSUFlCIENT BIASING OF THE OUTPUT CURRENT SOURCE AND
CONSEQUENTLY UNPREDICTABLE OR NO OPERATIONꢋ !CCORDINGLYꢆ WE HAVE INSTALLED AN
INTERNAL OUTPUTꢊLOADꢂVOLTAGE MONITORING CIRCUITꢋ )F THE OUTPUTꢊꢊLOAD VOLTAGE DROPS
BELOW ꢄꢋꢎ6 AND THE $4,ꢀꢁ!ꢂ,#gS OUTPUT IS AT RISK OF BECOMING DISABLEDꢆ THE
&AULT LINE ACTIVATESꢋ
4HE $4,ꢀꢁ!ꢂ,# CAN RELIABLY HANDLE ꢍꢄꢄ7 LOADS IF ITS ALUMINUM BASEPLATE
TEMPERATURE IS MAINTAINED AT OR BELOW ꢑꢁꢄª#ꢋ 7ITH NO HEAT SINKING OR
AUXILIARY COOLINGꢆ THE DEVICE CAN ONLY HANDLE LOADS UP TO ꢍꢄ 7ATTSꢋ 0LEASE
REFER TO THE 4EMPERATURE $ERATING #URVE FOR ADDITIONAL INFORMATIONꢋ $ATELgS
%LECTRONIC ,OAD !PPLICATIONS %NGINEERS CAN ASSIST YOU IN DEVELOPING HEATꢂ
SINK SOLUTIONS FOR YOUR HIGHERꢂPOWER $4,ꢀꢁ!ꢂ,# APPLICATIONSꢋ 0LEASE
CONTACT US FOR DETAILS AND CONCERNING OUR $4,ꢂ(3ꢍꢄꢄ$ꢍꢐ HEAT SINKꢋ
#ONSTANT 2ESISTANCE !PPLICATION
4HE &AULT LINE IS AN ACTIVEꢂLOW FUNCTION WITH AN OPENꢂCOLLECTOR OUTPUT ꢃINTERNAL
ꢍꢄK7 PULLꢂUP RESISTOR TO ꢑꢁ6ꢅꢋ 5NDER NORMAL CONDITIONSꢆ ITS OUTPUT IS HIGH
ꢃLOGIC ꢌꢍꢌꢅꢋ 5NDER FAULT CONDITIONS ꢃ6OUT ꢗ ꢄꢋꢎ6ꢅꢆ ITS OUTPUT DROPS TO A LOGIC ꢌꢄꢌꢋ
4HERE IS NO OUTPUTꢊLOADꢂVOLTAGE MONITORING CIRCUIT FOR VOLTAGES GREATER THAN ꢀꢄ6ꢆ
AND OPERATION ABOVE ꢀꢄ6 CAN DAMAGE THE DEVICEꢋ
4HE $4,ꢀꢁ!ꢂ,# OPERATES AS A CONSTANT CURRENT ELECTRONIC LOAD IN ITS TYPICAL
CONlGURATIONꢋ ! CONSTANT RESISTANCE MODE OF OPERATION CAN BE ACHIEVED
AS FOLLOWSꢖ
4HE $4,ꢀꢁ!ꢂ,# HAS A HIGH IMPEDANCE ISOLATED ANALOG INPUTꢆ THAT ALLOWS
THE ANALOG INPUTS TO BE CONNECTED DIRECTLY ACROSS THE LOADꢋ 4HE $4,ꢀꢁ!ꢂ,#
SINKS ꢁꢋꢄ AMPS FOR A ꢍꢄ6 FULL SCALE INPUT OR ) ꢇ ꢄꢋꢁ X 6).ꢋ )F YOU MAKE 6). ꢇ
6,/!$ ꢃTHE VOLTAGE ACROSS THE LOADꢅꢆ THEN 2 ꢇ 6,/!$ꢊ) ꢇ 6,/!$ ꢊ ꢃꢄꢋꢁ X 6,/!$ꢅ ꢇ
ꢐ /HMSꢋ #ONSEQUENTLYꢆ THE LOAD LOOKS LIKE A ꢐ /HM RESISTORꢋ
!N ꢌOFFSET SUPPLYꢌ CAN BE INSERTED BETWEEN THE $4,ꢀꢁ!ꢂ,#gS ꢂ,OAD OUTPUT ꢃPINS
ꢓ AND ꢔꢅ AND THE POWER DEVICE UNDER TEST ꢃ$54ꢅ TO ꢌTRANSLATEꢌ THE $4,ꢀꢁ!ꢂ,#gS
ꢐꢔꢋꢉ6 OUTPUTꢊLOAD VOLTAGE RANGEꢋ 4HE OFFSET SUPPLY MUST HAVE ADEQUATE CURRENT
CAPABILITIES AND BE CONNECTED WITH THE POLARITIES INDICATED IN &IGURE ꢐ BELOWꢋ
5NDER NO CIRCUMSTANCES SHOULD THE VOLTAGE ACROSS THE $4,ꢀꢁ!ꢂ,#gS OUTPUT BE
ALLOWED TO EXPERIENCE A POLARITY REVERSALꢋ
&URTHERMOREꢆ IF YOU MAKE 6). ꢇ K X 6,/!$ BY CONNECTING A POTENTIOMETER OR
RESISTIVE DIVIDER ACROSS THE LOADꢆ THEN 2 ꢇ 6,/!$ ꢊ ꢃꢄꢋꢁ X K X 6,/!$ꢅ ꢇ ꢐꢊK SO
ADJUSTING THE POTENTIOMETER WILL GIVE YOU AN ADJUSTABLE POWER RESISTOR EꢋGꢋ
AT + ꢇ ꢐꢆ THEN 2 ꢇ ꢍ /HMꢆ K ꢇ ꢍ THEN 2 ꢇ ꢐ /HMSꢆ ETCꢋ 4HE ONLY LIMITATION
THAT YOU MUST OBSERVE IS THE MAXIMUM LOAD VOLTAGE ꢃꢀꢄ6ꢅ AND ꢍꢄꢄ WATT
POWER DISSIPATIONꢋ ! MULTIPLYING DIGITALꢂTOꢂANALOG CONVERTERꢆ OR A DIGITAL
POTENTIOMETER COULD BE UTILIZED TO MAKE A PROGRAMMABLE RESISTANCEꢋ
)F A ꢁ6ꢊꢁꢋꢄ! OFFSET SUPPLY IS INSERTED AS SHOWNꢆ THE RANGE OF $54 VOLTAGES WILL
BE ꢂꢉꢋꢉ TO ꢑꢐꢁ 6OLTSꢋ 3UCH A CONlGURATION CAN BE USED FOR TRUE SHORTꢂCIRCUIT
TESTINGꢋ ! MECHANICAL RELAY CAN BE USED TO SHORT THE OUTPUTS OF THE $54 WHILE
THE OFFSET SUPPLY ENSURES THE $4,ꢀꢁ!ꢂ,# ALWAYS SEES AT LEAST ꢁ 6OLTS ACROSS
ITS OUTPUTSꢋ
&IGURE ꢂꢁ !N ꢉOFFSET 3UPPLYꢉ %NABLES
4RUE 3HORTꢈ#IRCUIT 4ESTING
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2012 Murata Power Solutions, Inc.
www.murata-ps.com/support
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