Datasheet FDD8880 Datasheet (Fairchild)

Page 1
N
April 2008
FDD8880
FDD8880
N-Channel PowerTrench® MOSFET 30V, 58A, 9mΩ
General Description
This N-Channel MOSFET has been designed specifically to improve the overall efficiency of DC/DC converters using either synchronous or conventional switching PWM controllers. It has been optimized for low gate charge, low r
and fast switching speed.
DS(ON)
Applications
• DC/DC converters
D
G
S
D-PAK
TO-252
(TO-252)
MOSFET Maximum Ratings T
Symbol Parameter Ratings Units
V V
I
E P T
D
DSS GS
AS
D
, T
J
STG
Drain to Source Voltage 30 V Gate to Source Voltage ±20 V Drain Current Continuous (T Continuous (T Continuous (T Pulsed Figure 4 A Single Pulse Avalanche Energy (Note 2) 53 mJ Power dissipation 55 W Derate above 25 Operating and Storage Te mperature -55 to 175
= 25oC, VGS = 10V) (Note 1)
C
= 25oC, VGS = 4.5V) (Note 1) 51 A
C
= 25oC, VGS = 10V, with R
amb
o
C0.37W/
= 25°C unless otherwise noted
C
Features
•r
•r
• High performance trench technology for extremely low
• Low gate charge
• High power and current handling capability
• RoHS Compliant
= 52oC/W) 13 A
θJA
DS(ON)
DS(ON)
r
DS(ON)
= 9mΩ, V = 12mΩ, V
= 10V, ID = 35A
GS
= 4.5V, ID = 35A
GS
G
D
S
58 A
tm
o
C
o
C
Thermal Characteristics
R
θJC
R
θJA
R
θJA
Thermal Resistance Junction to Case TO-252 2.73 Thermal Resistance Junction to Ambient TO-252 100 Thermal Resistance Junction to Ambient TO-252, 1in2 copper pad area 52
Package Marking and Ordering Information
Device Marking Device Package Reel Size Tape Width Quantity
FDD8880 FDD8880 TO-252AA 13” 12mm 2500 units
©2008 Fairchild Semiconductor Corporation
o
C/W
o
C/W
o
C/W
FDD8880 Rev. B3
Page 2
FDD8880
Electrical Characteristics T
= 25°C unless otherwise noted
C
Symbol Parameter Tes t Cond itions Min Typ Max Units
Off Characteristics
B
VDSS
I
DSS
I
GSS
Drain to Source Breakdown Voltage ID = 250µA, VGS = 0V 30 - - V
V
= 24V - - 1
Zero Gate Voltage Drain Current
DS
= 0V TC = 150oC - - 250
V
GS
Gate to Source Leakage Current VGS = ±20V - - ±100 nA
On Characteristics
V
GS(TH)
r
DS(ON)
Gate to Source Threshold Voltage VGS = VDS, ID = 250µA 1.2 - 2.5 V
I
= 35A, VGS = 10V - 0.007 0.009
D
= 35A, VGS = 4.5V - 0.009 0.012
I
Drain to Source On Resistance
D
I
= 35A, VGS = 10V,
D
= 175oC
T
J
- 0.013 0.015
Dynamic Characteristics
C
ISS
C
OSS
C
RSS
R
G
Q
g(TOT)
Q
g(5)
Q
g(TH)
Q
gs
Q
gs2
Q
gd
Input Capacitance Output Capacitance - 260 - pF Reverse Transfer Capacitance - 150 - pF
= 15V, VGS = 0V,
V
DS
f = 1MHz
Gate Resistance VGS = 0.5V, f = 1MHz - 2.3 - Ω Total Gate Charge at 10V VGS = 0V to 10V Total Gate Charge at 5V VGS = 0V to 5V - 13 17 nC
V
= 15V
Threshold Gate Charge VGS = 0V to 1V - 1.3 1.7 nC Gate to Source Gate Charge - 3.8 - nC Gate Charge Threshold to Plateau - 2.5 - nC
DD
= 35A
I
D
= 1.0mA
I
g
Gate to Drain “Miller” Charge - 5.0 - nC
- 1260 - pF
-2331nC
µA
Ω
Switching Characteristics
t
ON
t
d(ON)
t
r
t
d(OFF)
t
f
t
OFF
Turn-On Time Turn-On Delay Time - 8 - ns Rise Time - 91 - ns Turn-Off Delay Time - 38 - ns Fall Time - 32 - n s Turn-Off Time - - 108 ns
(VGS = 10V)
Drain-Source Diode Characteristics
V
SD
t
rr
Q
RR
Notes: 1: Package current limitation is 35A. 2: Starting T 3
Source to Drain Diode Voltage Reverse Recovery Time ISD = 35A, dISD/dt = 100A/µs- -27ns
Reverse Recovered Charge ISD = 35A, dISD/dt = 100A/µs- -14nC
= 25°C, L = 0.14mH, IAS = 28A, VDD = 27V, VGS = 10V.
J
- - 147 ns
= 15V, ID = 35A
V
DD
= 10V, RGS = 10Ω
V
GS
I
= 35A - - 1.25 V
SD
I
= 15A - - 1.0 V
SD
©2008 Fairchild Semiconductor Corporation FDD8880 Rev. B3
Page 3
FDD8880
Typical Characteristics T
= 25°C unless otherwise noted
C
1.2
1.0
0.8
0.6
0.4
0.2
POWER DISSIPATION MULTIPLIER
0
0 25 50 75 100 175
125
150
TC, CASE TEMPERATURE (oC)
Figure 1. Normali ze d Po we r Dis sip ation vs Case
Temperature
2
DUTY CYCLE - DESCENDING ORDER
0.5
1
0.2
0.1
0.05
0.02
0.01
0.1
, NORMALIZED
θJC
Z
THERMAL IMPEDANCE
0.01
-5
10
SINGLE PULSE
-4
10
-3
10
t, RECTANGULAR PULSE DURATION (s)
60
50
CURRENT LIMITED BY PACKAGE
40
VGS = 10V
30
20
, DRAIN CURRENT (A)
D
I
VGS = 4.5V
10
0
25 50 75 100 125 150 175
TC, CASE TEMPERATURE (oC)
Figure 2. Maximum Contin uous Drain Current vs
Case Temperature
P
DM
t
1
t
x R
θJC
+ T
2
C
1
10
NOTES: DUTY FACTOR: D = t
PEAK TJ = PDM x Z
-2
10
-1
10
θJC
10
1/t2
0
Figure 3. Normalized Maximum Transient Thermal Impedance
500
TRANSCONDUCTANCE MAY LIMIT CURRENT IN THIS REGION
VGS = 10V
VGS = 4.5V
100
, PEAK CURRENT (A)
DM
I
30
-5
10
-4
10
-3
10
-2
10
-1
10
t, PUL SE WIDTH (s)
TC = 25oC
FOR TEMPERATURES
o
ABOVE 25
C DERATE PEAK
CURRENT AS FOLLOWS:
175 - T
I = I
25
10
C
150
0
1
10
Figure 4. Peak Current Capability
©2008 Fairchild Semiconductor Corporation FDD8880 Rev. B3
Page 4
FDD8880
Typical Characteristics T
1000
100
10
OPERATION IN THIS
AREA MAY BE
, DRAIN CURRENT (A)
D
I
LIMITED BY r
1
SINGLE PULSE TJ = MAX RATED
= 25oC
T
C
0.1 110
DS(ON)
V
, DRAIN TO SOURCE VOLTAGE (V)
DS
= 25°C unless otherwise noted
C
Figure 5. Forward Bias Safe Operating Area
80
PULSE DURATION = 80µs DUTY CYCLE = 0.5% MAX
V
= 15V
DD
60
40
TJ = 25oC
, DRAIN CURRENT (A)
D
I
20
TJ = 175oC
0
1.5 2.0 2.5 3.0 3.5 4.0 VGS, GATE TO SOURCE VOLTAGE (V)
TJ = -55oC
10µs
100µs
1ms
10ms
DC
500
If R = 0 tAV = (L)(IAS)/(1.3*RATED BV
If R ≠ 0
= (L/R)ln[(IAS*R)/(1.3*RATED BV
t
AV
100
10
, AVALANCHE CURRENT (A)
AS
I
60
1
0.01 0.1 1
STARTING TJ = 150oC
tAV, TIME IN AVALANCHE (ms)
- VDD)
DSS
- VDD) +1]
DSS
STARTING TJ = 25oC
NOTE: Refer to Fairchild Applica ti on Note s AN75 14 and AN75 15
Figure 6. Unclamped Inductive Switching
Capability
80
VGS = 5V
60
VGS = 10V
40
, DRAIN CURRENT (A)
D
I
20
0
0 0.25 0.5 0.75 1.0
VDS, DRAIN TO SOURCE VOLTAGE (V)
VGS = 4V
PULSE DURATION = 80µs
DUTY CYCLE = 0.5% MAX
10
VGS = 3V
TC = 25oC
Figure 7. Transfer Characteristics Figure 8. Saturation Characteristics
25
ID = 35A
20
15
ID = 1A
, DRAIN TO SOURCE
ON RESISTANCE (mΩ)
10
DS(ON)
r
5
246810
V
, GATE TO SOURCE VOLTAGE (V)
GS
PULSE DURATION = 80µs DUTY CYCLE = 0.5% MAX
Figure 9. Drain to Source On Resis tanc e vs Ga te
Voltage and Drain Current
©2008 Fairchild Semiconductor Corporation FDD8880 Rev. B3
1.8
PULSE DURATION = 80µs DUTY CYCLE = 0.5% MAX
1.6
1.4
1.2
ON RESISTANCE
1.0
0.8
NORMALIZED DRAIN TO SOURCE
0.6
-80 -40 0 40 80 120 160 200 TJ, JUNCTION TEMPERATURE (oC)
VGS = 10V, ID = 35A
Figure 10. Normalized Drain to Source On
Resistance vs Junction Temperature
Page 5
FDD8880
Typical Characteristics T
1.2
1.0
0.8
NORMALIZED GATE
THRESHOLD VOLTAGE
0.6
0.4
-40 0 40 80 120 160 200-80 TJ, JUNCTION TEMPERATURE (oC)
= 25°C unless otherwise noted
C
VGS = VDS, ID = 250µA
Figure 11. Normalized Gate Thresho ld Voltage vs
Junction Temperature
2000
C
= CGS + C
1000
ISS
C
= C
RSS
GD
GD
C
≅ C
+ C
OSS
DS
GD
1.10 ID = 250µA
1.05
1.00
BREAKDOWN VOLTAGE
0.95
NORMALIZED DRAIN TO SOURCE
0.90
-80 -40 0 40 80 120 160 200 T
, JUNCTION TEMPERATURE (oC)
J
Figure 12. Normalized Drain to Source
Breakdown Voltage vs Junction Temperature
10
VDD = 15V
8
6
C, CAPACITANCE (pF)
V
= 0V, f = 1MHz
GS
100
0.1 1 10 VDS, DRAIN TO SOURCE VOLTAGE (V)
Figure 13. Capacitance vs Drain to Source
Voltage
4
2
, GATE TO SOURCE VOLTAGE (V)
GS
V
0
30
0 5 10 15 20 25
Qg, GATE CHARGE (nC)
WAVEFORMS IN DESCENDING ORDER:
ID = 35A I
= 1A
D
Figure 14. Gate Charge Waveforms for Constant
Gate Current
©2008 Fairchild Semiconductor Corporation FDD8880 Rev. B3
Page 6
Test Circuits and Waveforms
V
DS
L
TO OBTAIN
VARY t
P
REQUIRED PEAK I
V
GS
R
AS
G
+
V
DD
-
I
AS
DUT
t
0V
P
I
AS
0.01Ω
0
Figure 15. Unclamped Energy Test Circuit Figure 16. Unclamped Energy Waveforms
V
DS
V
DD
L
V
I
g(REF)
GS
DUT
+
V
DD
-
V
GS
0
I
g(REF)
= 1V
Q
gs2
Q
g(TH)
Q
gs
Q
0
Figure 17. Gate Charge Test Circuit Figure 18. Gate Charge Waveforms
BV
DSS
t
P
t
AV
Q
g(TOT)
V
DS
Q
g(5)
V
V
GS
VGS = 5V
gd
FDD8880
DS
V
DD
V
= 10V
GS
V
DS
R
L
V
GS
R
GS
V
GS
DUT
+
V
DD
-
V
DS
0
V
GS
10%
0
t
d(ON)
90%
t
ON
50%
t
10%
r
PULSE WIDTH
t
d(OFF)
90%
t
OFF
t
f
90%
10%
50%
Figure 19. Switching Time Test Circuit Figure 20. Switching Time Waveforms
©2008 Fairchild Semiconductor Corporation FDD8880 Rev. B3
Page 7
Thermal Resistance vs. Mounting Pad Area
The maximum rated junction temperature, TJM, and the thermal resistance of the heat dissipating path determines the maximum allowable device power dissipation, P application. Therefore the application’s ambient temperature, T must be reviewed to ensure that T Equation 1 mathematically represents the relationship and
(oC), and thermal resistance R
A
is never exceeded.
JM
DM
θJA
, in an
(oC/W)
serves as the basis for establishing the rating of the part.
P
DM
TJMTA–()
------------------- ----------=
R
θJA
(EQ. 1)
125
100
C/W)
o
(
75
θJA
R
50
R
= 33.32+ 23.84/(0.268+Area) EQ.2
θJA
R
= 33.32+ 154/(1.73+Area) EQ.3
θJA
FDD8880
In using surface mount devices such as the TO-252 package, the environment in which it is applied will have a significant influence on the part’s current and maximum power dissipation ratings. Precise determination of P complex and influenced by many factors:
DM
is
1. Mounting pad area onto which the device is attached and whether there is copper on one side or both sides of t he board.
2. The number of copper layers and the thickness of the board.
3. The use of external heat sinks.
4. The use of thermal vias.
5. Air flow and board orientation.
6. For non steady state applications, the pulse width, the duty cycle and the transient thermal response of the part, the board and the environment they are in.
Fairchild provides thermal information to assist the designer’s preliminary application evaluation. Figure 21 defines the R copper (component side) area. This is for a horizontally
for the device as a function of the top
θJA
positioned FR-4 board with 1oz copper after 1000 seconds of steady state power with no air flow. This graph provides the necessary information for calculation of the steady state junction temperature or power dissipation. Pulse applications can be evaluated using the Fairchild device Spice thermal model or manually utilizing the normalized maximum transient thermal impedance curve.
25
0.01 0.1 1 10 (0.645) (6.45) (64.5)(0.0645)
AREA, TOP COPPER AREA in2 (cm2)
Figure 21. Thermal Resistance vs Mounting
Pad Area
Thermal resistances corresponding to other copper area s can be obtained from Figure 21 or by calculation using Equation 2 or 3. Equation 2 is used for copper area defined in inches square and equation 3 is for area in centimeters square. The area, in square inches or square centimeters is the top copper area including the gate and source pads.
θJA
θJA
33.32
33.32
R
R
©2008 Fairchild Semiconductor Corporation FDD8880 Rev. B3
23.84
-------------------------------------+=
0.268 Area+()
Area in Inches Squared
154
----------------------------------+=
1.73 Area+()
Area in Centimeters Squared
(EQ. 2)
(EQ. 3)
Page 8
PSPICE Electrical Model
.SUBCKT FDD8880 2 1 3 ; rev April 2004 Ca 12 8 9.5e-10 Cb 15 14 9.5e-10 Cin 6 8 1.15e-9
Dbody 7 5 DbodyMOD Dbreak 5 11 DbreakMOD Dplcap 10 5 DplcapMOD
Ebreak 11 7 17 18 33.15 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 5.3e-9
Ldrain 2 5 1.0e-9 Lsource 3 7 1.7e - 9
RLgate 1 9 53 RLdrain 2 5 10 RLsource 3 7 17
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 3.2e-3 Rgate 9 20 2.2 RSLC1 5 51 RSLCMOD 1e-6 RSLC2 5 50 1e3 Rsource 8 7 RsourceMOD 3.2e-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
GATE
1
LGATE
RLGATE
RGATE
9
CA
ESG
+
EVTEMP
+
-
18 22
20
S1A
12
13
8
S1B
EGS EDS
-
13
6 8
10
RSLC2
6
14 13
+
+
6 8
-
-
DPLCAP
EVTHRES
+
19
8
S2A
S2B
15
CIN
CB
-
+
-
5
51
5
51
MSTRO
14
5 8
RSLC1
+
ESLC
­50
RDRAIN
16
21
8
MMED
DBREAK
EBREAK
MWEAK
RSOURCE
RBREAK
17 18
IT
8
RVTHRES
FDD8880
LDRAIN
RLDRAIN
11
+
17
DBODY
18
-
LSOURCE
7
RLSOURCE
RVTEMP 19
­VBAT
+
22
DRAIN
2
SOURCE
3
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=2E-12 IKF=10 N=1.01 RS=3.76e-3 TRS1=8e-4 TRS2=2e-7
+ CJO=4.8e-10 M=0.55 TT=1e-17 XTI=2) .MODEL DbreakMOD D (RS=0.2 TRS1=1e-3 TRS2=-8.9e-6) .MODEL DplcapMOD D (CJO=5 .5e-10 IS=1e-30 N=10 M=0.45)
.MODEL MmedMOD NMOS (VTO=2.0 KP=10 IS=1e-30 N=10 TOX=1 L=1u W=1u RG=2.2) .MODEL MstroMOD NMOS (VTO=2.5 KP=170 IS=1e-30 N=10 TOX=1 L=1u W=1u) .MODEL MweakMOD NMOS (VTO=1.69 KP=0.05 IS=1e-30 N=10 TOX=1 L=1u W=1u RG=22 RS=0.1)
.MODEL RbreakMOD RES (TC1 =8.3e-4 TC2=-8e-7) .MODEL RdrainMOD RES (TC1=1.8e-3 TC2=8e-6) .MODEL RSLCMOD RES (TC1=9e -4 TC2=1e-6) .MODEL RsourceMOD RES (TC1=5e-3 TC2=1e-6) .MODEL RvthresMOD RES (TC1=-1e-3 TC2=-8.2e-6) .MODEL RvtempMOD RES (TC1=- 2.6e-3 TC2=2e-7)
.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=-1.3 VOFF=-0.8) .MODEL S2BMOD VSWITCH (RON=1e-5 ROFF=0.1 VON=-0.8 VOFF=-1.3) .ENDS
Note: For further discussio n of the PSP ICE mode l, consul t A New PSPICE Sub-Circuit for the Power MOSFET Featuring Global Temperature Options; IEEE Power Electronics Specialist Confere nce Records, 1991, written by William J. Hepp and C. Frank Wheatley.
©2008 Fairchild Semiconductor Corporation FDD8880 Rev. B3
Page 9
SABER Electrical Model
rev April 2004 template FDD8880 n2,n 1,n3 electrical n2,n1,n3
{ var i iscl dp..model dbodymod = (isl=2e-12,ikf=10,nl=1.01,rs=3.76e-3,trs1=8e-4,trs2=2e-7,cjo=4.8e-10,m=0.55,tt=1e-17,xti=2) dp..model dbreakmod = (rs=0.2,trs1=1e-3,trs2=-8.9e-6) dp..model dplcapmod = (cjo=5.5e-10,isl=10e-30,nl=10,m=0.45) m..model mmedmod = (type=_n,vto=2.0,kp=10,is=1e-30, tox=1) m..model mstrong mod = (type=_n,vto=2 .5,kp=170,is=1e- 30, tox=1) m..model mweakmod = (type=_n,vto=1.69,kp=0.05,is=1e-30, tox=1,rs=0.1) sw_vcsp..model s1amod = (ron=1e-5,roff=0.1,von=-4,voff=-3.5) sw_vcsp..model s1bmod = (ron=1e-5,roff=0.1,von=-3.5,voff=-4) sw_vcsp..model s2amod = (ron=1e-5,roff=0.1,von=-1.3,voff=-0.8) sw_vcsp..model s2bmod = (ron=1e-5,roff=0.1,von=-0.8,voff=-1.3) c.ca n12 n8 = 9.5e-10 c.cb n15 n14 = 9.5e-10 c.cin n6 n8 = 1.15e-9
dp.dbody n7 n5 = model= dbodymod dp.dbreak n5 n11 = model=dbreakmod
ESG
dp.dplcap n10 n5 = model=dplcapmod spe.ebreak n11 n7 n17 n18 = 33.15
spe.eds n14 n8 n5 n8 = 1 spe.egs n13 n8 n6 n8 = 1 spe.esg n6 n10 n6 n8 = 1
GATE
1
LGATE
RLGATE
RGATE
9
EVTEMP +
18 22
20
spe.evthres n6 n 21 n19 n8 = 1 spe.evtemp n20 n6 n18 n22 = 1
i.it n8 n17 = 1 l.lgate n1 n9 = 5.3e-9
l.ldrain n2 n5 = 1.0e-9 l.lsource n3 n7 = 1.7e-9
CA
S1A
12
S1B
res.rlgate n1 n9 = 53 res.rldrain n2 n5 = 10 res.rlsource n3 n7 = 17
m.mmed n16 n6 n8 n8 = model=mmedm od, l=1u, w=1u m.mstrong n16 n6 n8 n8 = model=mstrongmod, l=1u, w=1u m.mweak n16 n21 n8 n8 = model=mweakmod, l=1u, w=1u
res.rbreak n17 n18 = 1, tc1=8.3e-4,tc2=-8e - 7 res.rdrain n50 n16 = 3.2e-3, tc1=1.8e-3,tc2=8e-6 res.rgate n9 n20 = 2.2 res.rslc1 n5 n51 = 1e-6, tc1=9e-4,tc2=1e-6 res.rslc2 n5 n50 = 1e3 res.rsource n8 n7 = 3.2e-3, tc1=5e-3,tc2=1e-6 res.rvthres n22 n8 = 1, tc1=-1e-3,tc2=-8.2e - 6 res.rvtemp n18 n19 = 1, tc1=-2.6e-3,tc2=2e-7 sw_vcsp.s1a n6 n12 n13 n8 = model=s1amod sw_vcsp.s1b n13 n12 n13 n8 = model=s1bmod sw_vcsp.s2a n6 n15 n14 n13 = model=s2amod sw_vcsp.s2b n13 n15 n14 n13 = model=s2bmod
DPLCAP
10
RSLC2
­6
8
EVTHRES
+
+
19
8
6
-
S2A
14
13
13
8
S2B
13
+
+
6
EGS EDS
8
-
-
15
CIN
CB
-
+
-
5
MSTRO
14
5 8
RSLC1
51
ISCL
50 RDRAIN
16
21
8
MMED
8
DBREAK
11
MWEAK
EBREAK
+
-
RSOURCE
RBREAK
17 18
IT
RVTHRES
17 18
7
RVTEMP 19
-
+
22
RLSOURCE
LDRAIN
RLDRAIN
DBODY
LSOURCE
VBAT
DRAIN
2
SOURCE
3
FDD8880
v.vbat n22 n19 = dc=1 equations { i (n51->n50) +=iscl iscl: v(n51,n50) = ((v(n5,n51)/(1e-9+abs(v(n5,n51))))*((abs(v(n5,n51)*1e6/170))** 5)) } }
©2008 Fairchild Semiconductor Corporation FDD8880 Rev. B3
Page 10
FDD8880
PSPICE Thermal Model
REV 23 April 2004 FDD8880T CTHERM1 TH 6 8e-4
CTHERM2 6 5 1e-3 CTHERM3 5 4 2.5e-3 CTHERM4 4 3 2.6e-3 CTHERM5 3 2 8e-3 CTHERM6 2 TL 1.5e-2
RTHERM1 TH 6 1. 44 e- 1 RTHERM2 6 5 1.9e-1 RTHERM3 5 4 3.0e-1 RTHERM4 4 3 4.0e-1 RTHERM5 3 2 5.7e-1 RTHERM6 2 TL 5.8e-1
SABER Thermal Model
SABER thermal model FDD8880T template thermal_model th tl thermal_c th, tl { ctherm.ctherm1 th 6 =8e-4 ctherm.ctherm2 6 5 =1e-3 ctherm.ctherm3 5 4 =2.5e-3 ctherm.ctherm4 4 3 =2.6e-3 ctherm.ctherm5 3 2 =8e-3 ctherm.ctherm6 2 t l =1.5e-2
rtherm.rtherm1 th 6 =1.4 4e-1 rtherm.rtherm2 6 5 =1.9e-1 rtherm.rtherm3 5 4 =3.0e-1 rtherm.rtherm4 4 3 =4.0e-1 rtherm.rtherm5 3 2 =5.7e-1 rtherm.rtherm6 2 tl =5.8e-1 }
RTHERM1
RTHERM2
RTHERM3
RTHERM4
RTHERM5
JUNCTION
th
CTHERM1
6
CTHERM2
5
CTHERM3
4
CTHERM4
3
CTHERM5
RTHERM6
2
CTHERM6
tl
CASE
©2008 Fairchild Semiconductor Corporation FDD8880 Rev. B3
Page 11
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FDD8880 Rev. B3
Rev. I34
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