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IQ24500HED08NRS-G Datasheet(PDF) 10 Page - SynQor Worldwide Headquarters |
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IQ24500HED08NRS-G Datasheet(HTML) 10 Page - SynQor Worldwide Headquarters |
10 / 12 page Input: Output: Current: Package: 18-36 V 50 V 8 A (400 W) Half-brick Technical Specification APPLICATIONCONSIDERATIONS Input System Instability:Thisconditioncanoccurbecause any DC-DC converter appears incrementally as a negative resistanceload.Adetailedapplicationnotetitled“InputSystem Instability”isavailableontheSynQorwebsitewhichprovides anunderstandingofwhythisinstabilityarises,andshowsthe preferredsolutionforcorrectingit. Application Circuits:FigureCbelowprovidesatypicalcircuit diagramwhichdetailstheinputfilteringandvoltagetrimming. Input Filtering and External Input Capacitance:FigureD belowshowstheinternalinputfiltercomponents.Thisfilterdra- matically reduces input terminal ripple current, which otherwise couldexceedtheratingofanexternalelectrolyticinputcapacitor. Therecommendedexternalinputcapacitanceisspecifiedinthe InputCharacteristicssectionontheElectricalSpecificationspage. More detailed information is available in the application note titled“EMICharacteristics”ontheSynQorwebsite. Output Filtering and External Output Capacitance: FigureDbelowshowstheinternaloutputfiltercomponents.This filterdramaticallyreducesoutputvoltageripple.However,some minimumexternaloutputcapacitanceisrequired,asspecifiedin theOutputCharacteristicssectionontheElectricalSpecifications page.Nodamagewilloccurwithoutthiscapacitorconnected, butpeakoutputvoltageripplewillbemuchhigher. Vin External Input Filter Trim Vin(+) Iload Cload L Vout(+) Rtrim-up or Rtrim-down Vsense(+) ON/OFF Vin(_) Vin(+) Vin(_) Vout(_) Vsense(_) Electrolytic Capacitor Figure D: Typical application circuit (negative logic unit, permanently enabled). C Figure E: Internal Input Filter Diagram (component values listed on the specifications page). Product # IQ24500HEx08 Phone 1-888-567-9596 www.synqor.com Doc.# 005-IHE2450 Rev. C 03/31/09 Page 10 |
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