HV301/HV311
Use with Negative Ground
Current Limit Stability (Method 2 (Servo) Only)
ThOVHꢀ301VeidVHꢀ311VmeyVbOVusOdVwa hVmeiyVꢂtsa avOVgptuid
sys OmsVwhOpOVDC/DCVPWMVCtivOp OpsVhevOVastle OdVtu ꢂu s
eidV hOapVaiꢂu sViOOdVit VbOVgptuidVpOfOpOicOdV( Application
Circuit 14).
ThOVcltsOdVlttꢂVcuppOi VmtdOVcti ptlVsys OmVusOdVaiV hOVHꢀ301/
Hꢀ311VasVvOpyVs eblO,VOsꢂOcaellyVwhOiVdpavaigVMꢁSFETsVwa h
haghVge OVceꢂeca eicOsV(CISS).VVHtwOvOp,VeVꢂOekaigVaiVILIMITViOep
hOVOidVtfV hOVcuppOi Vlama VmeyVbOVit OdVwa hVstmOVMꢁSFETs.
ThOVcuppOi Vcti ptlVlttꢂVceiVbOVfpOquOicyVctmꢂOise OdV t
Olamaie OV hasVꢂOekaigVbyVeddaigVeVsOpaOsVctiiOc OdVceꢂeca tp
eidVpOsas tpVbO wOOiV hOVge OVeidVstupcOVtfV hOVOx OpielVMꢁSFET.
ThOVpOctmmOidOdVs ep aigVveluOsVftpVCVeidVRVepOV10iFVeidV1K.
ThOsOVctmꢂOise atiVveluOsVshtuldVbOVvOpafaOdVbyVbtepdVlOvOl
Os aig,VwhachVmeyVyaOldVse asfec tpyVpOsul sVwa hVpOducOdVctm-
ꢂtiOi VveluOs.
+48V
8
V
DD
1
PWRGD / PWRGD
R1
487kΩ
ENABLE/ ENABLE
+5V
Cload
3
2
UV
R2
HV301/
HV311
6.81kΩ
COM
OV
DC/DC PWM CONVERTER
R3
9.76kΩ
RAMP
V
4
SENSE GATE
EE
7
5
6
C1
10nF
GND
R4
12.5mΩ
Q1
IRF530
Nt O:Vceꢂeca tpVmeyVbOViOOdOdV tVsltwVPWRGDVdv/d VafVge O
tscalle atisVeptuidVepOVtbsOpvOdVwhOiVꢀINVasVcltsOV tVꢁꢀLꢁ.
Application Circuit 14
A092605
17
SUPERTEX [ Supertex, Inc ]
