FDS8978 Dual N-Channel PowerTrench
®
MOSFET
PSPICE Electrical Model
.SUBCKT FDS8978 2 1 3
*February 2005
Ca 12 8 7.8e-10
Cb 15 14 7.8e-10
Cin 6 8 .78e-9
Dbody 7 5 DbodyMOD
Dbreak 5 11 DbreakMOD
Dplcap 10 5 DplcapMOD
Ebreak 11 7 17 18 32.9
Eds 14 8 5 8 1
Egs 13 8 6 8 1
Esg 6 10 6 8 1
Evthres 6 21 19 8 1
Evtemp 20 6 18 22 1
It 8 17 1
Lgate 1 9 5.29e-9
Ldrain 2 5 1.0e-9
Lsource 3 7 0.18e-9
RLgate 1 9 52.9
RLdrain 2 5 10
RLsource 3 7 1.8
Mmed 16 6 8 8 MmedMOD
Mstro 16 6 8 8 MstroMOD
Mweak 16 21 8 8 MweakMOD
Rbreak 17 18 RbreakMOD 1
Rdrain 50 16 RdrainMOD 1.6e-3
Rgate 9 20 2.3
RSLC1 5 51 RSLCMOD 1e-6
RSLC2 5 50 1e3
Rsource 8 7 RsourceMOD 8.9e-3
Rvthres 22 8 RvthresMOD 1
Rvtemp 18 19 RvtempMOD 1
S1a 6 12 13 8 S1AMOD
S1b 13 12 13 8 S1BMOD
S2a 6 15 14 13 S2AMOD
S2b 13 15 14 13 S2BMOD
Vbat 22 19 DC 1
ESLC 51 50 VALUE={(V(5,51)/ABS(V(5,51)))*(PWR(V(5,51)/(1e-6*170),5))}
.MODEL DbodyMOD D (IS=2.0E-12 IKF=10 N=1.01 RS=7.0e-3 TRS1=8e-4 TRS2=2e-7
+ CJO=3.5e-10 M=0.55 TT=7e-11 XTI=2)
.MODEL DbreakMOD D (RS=0.2 TRS1=1e-3 TRS2=-8.9e-6)
.MODEL DplcapMOD D (CJO=3.8e-10 IS=1e-30 N=10 M=0.45)
.MODEL MstroMOD NMOS (VTO=2.36 KP=150 IS=1e-30 N=10 TOX=1 L=1u W=1u)
.MODEL MmedMOD NMOS (VTO=1.95 KP=5.0 IS=1e-30 N=10 TOX=1 L=1u W=1u RG=2.3)
.MODEL MweakMOD NMOS (VTO=1.57 KP=0.02 IS=1e-30 N=10 TOX=1 L=1u W=1u RG=23 RS=0.1)
.MODEL RbreakMOD RES (TC1=8.3e-4 TC2=-8e-7)
.MODEL RdrainMOD RES (TC1=15e-3 TC2=0.1e-5)
.MODEL RSLCMOD RES (TC1=1e-4 TC2=1e-6)
.MODEL RsourceMOD RES (TC1=1e-3 TC2=3e-6)
.MODEL RvtempMOD RES (TC1=-1.8e-3 TC2=2e-7)
.MODEL RvthresMOD RES (TC1=-2.0e-3 TC2=-6e-6)
MODEL S1AMOD VSWITCH (RON=1e-5 ROFF=0.1 VON=-4 VOFF=-3.5)
.MODEL S1BMOD VSWITCH (RON=1e-5 ROFF=0.1 VON=-3.5 VOFF=-4)
.MODEL S2AMOD VSWITCH (RON=1e-5 ROFF=0.1 VON=-1.5 VOFF=-1.0)
.MODEL S2BMOD VSWITCH (RON=1e-5 ROFF=0.1 VON=-1.0 VOFF=-1.5).ENDSNote: For further discussion of the PSPICE mod-
el, consult
A New PSPICE Sub-Circuit for the Power MOSFET Featuring Global
Temperature Options;
IEEE Power Electronics Specialist Conference Records, 1991, written by William J. Hepp and C. Frank
Wheatley.
LGATE
GATE
1
RLGATE
CIN
LDRAIN
5
RLDRAIN
DBREAK
11
+
17
EBREAK 18
-
MWEAK
MMED
MSTRO
LSOURCE
8
RSOURCE
12
S1A
13
8
S1B
CA
13
+
EGS
-
6
8
EDS
-
S2A
14
13
S2B
CB
+
5
8
8
RVTHRES
14
IT
-
VBAT
+
22
15
17
RBREAK
18
RVTEMP
19
7
RLSOURCE
SOURCE
3
DRAIN
2
RSLC1
51
ESLC
50
DPLCAP
10
RSLC2
5
51
-
ESG
+
EVTEMP
RGATE + 18 -
22
9
20
6
8
EVTHRES
+ 19 -
8
6
©2011 Fairchild Semiconductor Corporation
FDS8978 Rev. B1
8
+
-
RDRAIN
21
16
DBODY
www.fairchildsemi.com
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
