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IQ32120HPC13NRS 参数 Datasheet PDF下载

IQ32120HPC13NRS图片预览
型号: IQ32120HPC13NRS
PDF下载: 下载PDF文件 查看货源
内容描述: 半砖DC- DC转换器 [Half-brick DC-DC Converter]
分类和应用: 转换器
文件页数/大小: 12 页 / 1723 K
品牌: SYNQOR [ SYNQOR WORLDWIDE HEADQUARTERS ]
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Technical  
Specification  
IQ32-HPC Family  
Beforeꢀtimeꢀt0,ꢀwhenꢀtheꢀinputꢀvoltageꢀisꢀbelowꢀtheꢀUVLꢀthreshold,ꢀ  
theꢀunitꢀisꢀdisabledꢀbyꢀtheꢀInputꢀUnder-VoltageꢀLockoutꢀfeature.ꢀ  
Whenꢀ theꢀ inputꢀ voltageꢀ risesꢀ aboveꢀ theꢀ UVLꢀthreshold,ꢀ theꢀ  
InputUnder-VoltageLockoutisreleased,andaStartupInhibitꢀ  
Periodꢀisꢀinitiated.ꢀꢀAtꢀtheꢀendꢀofꢀthisꢀdelay,ꢀtheꢀON/OFFꢀpinꢀisꢀ  
evaluated, and since it is active, the unit turns on.  
maximum power the converter can dissipate for a given thermal  
conditionꢀifꢀitsꢀbase-plateꢀisꢀtoꢀbeꢀnoꢀhigherꢀthanꢀ100ꢀºC.  
100 ºCꢀ-ꢀTA  
Pmax  
=
dissꢀꢀꢀꢀꢀꢀꢀRTH  
BA  
Thisꢀvalueꢀofꢀpowerꢀdissipationꢀcanꢀthenꢀbeꢀusedꢀinꢀconjunctionꢀ  
withꢀtheꢀdataꢀshownꢀinꢀFigureꢀ2ꢀtoꢀdetermineꢀtheꢀmaximumꢀloadꢀ  
currentꢀ(andꢀpower)ꢀthatꢀtheꢀconverterꢀcanꢀdeliverꢀinꢀtheꢀgivenꢀ  
thermal condition.  
Atꢀtimeꢀt1,ꢀtheꢀunitꢀisꢀdisabledꢀbyꢀtheꢀON/OFFꢀpin,ꢀandꢀitꢀcannotꢀ  
beꢀenabledꢀagainꢀuntilꢀtheꢀStartupꢀInhibitꢀPeriodꢀhasꢀelapsed.  
Whenꢀ theꢀ ON/OFFꢀ pinꢀ goesꢀ highꢀ afterꢀ t2,ꢀ theꢀ Startupꢀ Inhibitꢀ  
Period has elapsed, and the output turns on within the typical  
Turn-OnꢀTime.  
Forꢀconvenience,ꢀFiguresꢀ3ꢀandꢀ4ꢀprovideꢀPowerꢀderatingꢀcurvesꢀ  
for an encased converter without a heatsink and with a typical  
1/4"ꢀhighꢀheatsink.  
Thermal Considerations: The maximum operating base-  
plate temperature, TB,ꢀisꢀ100ꢀºC.ꢀAsꢀlongꢀasꢀtheꢀuser’sꢀthermalꢀ  
system keeps TB <ꢀ 100ꢀ ºC,ꢀ theꢀ converterꢀ canꢀ deliverꢀ itsꢀ fullꢀ  
rated power.  
Aꢀpowerꢀderatingꢀcurveꢀcanꢀbeꢀcalculatedꢀforꢀanyꢀheatsinkꢀthatꢀisꢀ  
attached to the base-plate of the converter. It is only necessary  
toꢀdetermineꢀtheꢀthermalꢀresistance,ꢀRTH , of the chosen heatsink  
BA  
between the base-plate and the ambient air for a given airflow  
rate. This information is usually available from the heatsink  
vendor. The following formula can the be used to determine the  
V
in  
Under-Voltageꢀ  
LockoutꢀTurn-  
OnꢀThreshold  
ON/OFF  
(negꢀlogic)  
ON  
OFF  
ON  
OFF  
ON  
9ms (typical  
turnꢀonꢀtime)  
V
out  
200ms  
(typical start-up  
inhibitꢀperiod)  
200ms  
200ms  
t
t0  
t1  
t2  
Figure F: Startup Inhibit Period (turn-on time not to scale)  
Product # IQ32xxxHPCxx  
Phone 1-888-567-9596  
www.synqor.com  
Doc.# 005-005H332 Rev. 1  
08/13/08  
Page 11