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參數(shù)資料
| 型號： | PQ60260HTB10PRS |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 250 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | HALF-BRICK PACKAGE-11 |
| 文件頁數(shù)： | 4/13頁 |
| 文件大小： | 1524K |
| 代理商： | PQ60260HTB10PRS |
Product # PQ60260HTB10
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-2HTB26F Rev. H
10/10/08
Page 12
Input:
Output:
Current:
Package:
35-75 V
26 V
9.6 A (250W)
Half-brick
Technical Specification
FULLFEATUREAPPLICATIONNOTES
This section provides some basic application information for the
full-feature version of the PowerQor series converter. The pin-out
configurationfortheseoptionalfeaturepinsisshownonpage2,
andthepartnumberingformatisshownonthelastpageofthis
specificationsheet.
All units in this product family include back-drive protection to
simplifytheuseofmultipleconvertersinaparallelorsequencing
application. However, any voltage applied to the output of the
convertershouldbekeptbelow120%oftheratedoutputvoltage
oftheconverter.
Inadditiontoback-driveprotection,theseunitsincludethefollow-
ingfeatures(pins):
Current Share (pin 3):Theactivecurrentsharefeatureallows
forN+1andparallelapplications.Toachieveloadsharing,direct-
lyconnecttheIsharepinsofmultipleunits.Theloadcurrentwill
shareequallyamongthemultipleunits(±5%atfullratedcurrent).
ItisimportantthattheVin(-)pinsofthesharingunitsbedirectlycon-
nectedandNOTplacedoutsideofanEMIfilterorotherimpedance
path.ThevoltageattheISharepinwillrangefrom0to5volts(at
fullratedcurrent),referencedtotheprimary-sideground,Vin(-).
Start Sync (pin B):TheStartSynchronizationpinwillallowa
moreconsistentstart-upsequence.Tooperatethisfeature,connect
togethertheStart-Syncpinsofmultiplecurrent-sharingunits.Thiswill
permitimmediatestart-upwithloadsgreaterthanthecurrentlimitof
asingleunit.Withoutthisconnection,anysetofconvertersattempt-
ingtoasynchronouslystart(orre-start)withaloadgreaterthanthe
currentlimitofasingleunitwill“hiccup”.This“hiccup”modewill
continueuntiloneconverterattemptsastartatthesametimeasthe
minimumnumberofadditionalunitsnecessarytosustaintheload
condition.Forexample,three50ampunitsstartingintoa90amp
loadwouldrequiretwounitstosimultaneouslyattemptastart.The
StartSyncconnectionsynchronizesthesestartingattemptsandpro-
videsamoreconsistentandreliablestart-upsequence.Fordetails
aboutthe“hiccupmode”orrepeatedstartupattempts,pleasesee
the“StartupInhibitPeriod”noteinthisTechnicalSpecification.
Clock Sync (pin A): The External Clock Synchronization pin
providestheabilityfortheusertocontroltheEMIsignatureand
synchronize sensitive circuitry to quiet periods in the converter
operation.Withthisoption,theconvertercanbesynchronizedto
an external clock signal whose frequency is greater than that of
the free-running internal clock. However, substantially raising the
converter’sfrequencywillreduceitsefficiency.Therefore,therec-
ommendedfrequencyrangefortheexternalclocksynchronization
signalappliedtothispinwouldbethelowestvaluepossiblewithout
droppingbelowtheminimumfrequencylistedbelow:
340KHzforthe26Vunit
Thefollowingrequirementsshouldalsobemet:
Theexternalclocksignalshouldbereferencedtothe
negativeinputvoltage,Vin(-).
Thehighlevelofthesignalshouldbebetween3.5Vand5.0V.
Thelowlevelshouldbebetween-0.5Vand+1.2V.
Donotapplyaclocksignallowerthanthespecified
frequency.
Under-Voltage
LockoutTurn-On
Threshold
ON/OFF
(poslogic)
Figure F: Startup Inhibit Period (turn-on time not
to scale)
Vout
Vin
200ms
(typicalstart-up
inhibitperiod)
t0
t1
t2
t
25ms
(typical
turnontime)
ON
OFF
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