HV301/HV311
Application Information
Supported External Pass Devices
Paralleling External Pass Transistors
ThOVHꢀ301VeidVHꢀ311VepOVdOsagiOdV tVsuꢂꢂtp VN-CheiiOl
MꢁSFETsVeidVIGBTs.
DuOV tVvepae atisVaiV hpOshtldVvtl egOsVeidVgeaiVchepec Opas acs
bO wOOiVsemꢂlOsVtfV peisas tpsVpOlaeblOV50%VcuppOi VshepaigVas
it VechaOveblO.VVStmOVmOesupOVtfVꢂepellOlaigVmeyVbOVecctm-
ꢂlashOdVbyVeddaigVpOsas tpsVaiVsOpaOsVwa hV hOVstupcOVtfVOech
dOvacO;VhtwOvOp,Va VwallVceusOVaicpOesOdVvtl egOVdptꢂVeidVꢂtwOp
dassaꢂe ati.
Selection of External Pass Devices
SaicOV hOVcuppOi Vlama VasVlakOlyV tVbOVsO Vjus Vslagh lyVhaghOpV hei
mexamumVcti aiutusVltedVcuppOi VaiVeV yꢂacelVsys Om,V hO
cti aiutusVcuppOi Vpe aigVtfV hOVdOvacOVwallVhevOV tVbOVe VlOes
OquelV tV hOVcuppOi Vlama VveluO.
PepellOlaigVtfVOx OpielVPessVdOvacOsVasVit VpOctmmOidOd!
IfVeVsuffacaOi lyVhaghVcuppOi Vpe OdVOx OpielVꢂessV peisas tpVceiit
bOVftuidV hOiVaicpOesOdVcuppOi Vceꢂebala yVmeyVbOVechaOvOdVby
ctiiOc aigVaidOꢂOidOi Vht VsweꢂVcapcua sVaiVꢂepellOl,VsaicOV hOy
ec VesVcuppOi VstupcOsVdupaigV hOVltedVceꢂeca tpVchepgaigV amO
whOiV hOVcapcua sVepOVaiVcuppOi Vlama .VVFtpV hasVeꢂꢂlace atiV hO
Hꢀ301Vwa hVec avOVhaghVPWRGDVasVpOctmmOidOdVwhOpOV hO
PWRGDVꢂaisVtfVmul aꢂlOVht VsweꢂVcapcua sVceiVbOVctiiOc OdVai
eVwapOdVꢁRVctifagupe ati.
ThOV RDS(ꢁN)VtfV hOVdOvacOVasVlakOlyV tVbOVsOlOc OdVbesOdVti
elltweblOVvtl egOVdptꢂVef OpV hOVht VsweꢂVec atiVhesVbOOi
ctmꢂlO Od.VVThusV hOVcti aiutusVꢂtwOpVdassaꢂe atiVpe aigVtfV hO
dOvacOVceiVbOVdO OpmaiOdVfptmV hOVftlltwaigVOque ati:
P
= RDS(ON) × IL2IMIT
CONT
ThOVꢂOekVꢂtwOpVpe aigVmeyVbOVcelcule OdVfptmV hOVftlltwaig
Oque ati:
P
= VIN × ILIMIT
PEAK
GavOiV hOsOVveluOsVeiVOx OpielVꢂessV peisas tpVmeyVbOVsOlOc Od
fptmV hOVmeiufec upOpsVde eVshOO .
Selection of Current Sense Resistor
ThOVꢂtwOpVpe aigVtfV hOVsOisOVpOsas tpVmus VbOVgpOe OpV hei
2
,VwhOpOVIltedVasV hOVitpmelVmexamumVtꢂOpe aigVlted.
Ilted ×R
Kelvin Connection to Sense Resistor
PhysacelVleytu VtfV hOVꢂpai OdVcapcua VbtepdVasVcpa acelVftpVctppOc
cuppOi VsOisaig.VVIdOellyV pecOVptu aigVbO wOOiV hOVcuppOi VsOisO
pOsas tpVeidV hOVꢀEEVeidVSENSEVꢂaisVshtuldVbOVdapOc VeidVes
shtp VesVꢂtssablOVwa hVzOptVcuppOi VaiV hOVsOisOV pecOs.VVThOVusO
tfVKOlvaiVctiiOc atiVfptmVSENSEVꢂaiVeidVꢀ VꢂaiV tV hOVpOsꢂOc-
EE
avOVOidsVtfV hOVcuppOi VsOisOVpOsas tpVasVpOctmmOidOd.
To
To
SENSE
Pin
V
EE
Pin
To Negative
Terminal of
Power Source
To Source
of MOSFET
Sense Resistor
A092605
9
SUPERTEX [ Supertex, Inc ]
