Thermal Resistance Junction to Case TO-220, TO-2631.0
Thermal Resistance Junction t o Ambient TO- 220, TO-263 (Note 2)62
Thermal Resistance Junction to Ambient TO-263, 1in2 copper pad ar ea43
FDB2552FDB2552TO-263AB330mm24mm800 units
FDP2552FDP2552TO-220ABTubeN/A50 units
FDB25 52 / FDP2552
Electrical Characteristics
TC = 25°C unless otherwise noted
SymbolParameterTest Con ditionsMinTypMaxUnits
Off Characteristics
B
I
DSS
I
GSS
VDSS
Drain to Sou r c e Br ea k down Voltag eID = 250µA, VGS = 0V150--V
V
= 120V--1
Zero Gate Voltage Drain Current
DS
= 0VTC = 150oC- -250
V
GS
Gate to Source Leakage CurrentVGS = ±20V--±100nA
On Characteristics
V
GS(TH)
r
DS(ON)
Gate to Source Threshold VoltageVGS = VDS, ID = 250µA2-4V
= 16A, VGS = 10V -0.0320.036
I
D
I
= 8A, VGS = 6V -0.0360.054
Drain to S ou r c e On Re si st ance
D
= 16A, VGS = 10V,
I
D
T
= 175oC
J
-0.0840.097
Dynamic Characteristics
C
C
C
Q
Q
Q
Q
Q
ISS
OSS
RSS
g(TOT)
g(TH)
gs
gs2
gd
Input Capacitance
Output Capacitanc e-285-pF
Reverse Transfer Capacitance-55-pF
= 25V, VGS = 0V,
V
DS
f = 1MHz
Total Gate Charge at 10VVGS = 0V to 10V
Threshold Gate ChargeVGS = 0V to 2V-5.26.8nC
Gate to Source Gate Charg e-13.5-nC
Gate Charge Threshold to Plateau-8.4-nC
V
DD
I
= 16A
D
I
= 1.0m A
g
= 75V
Gate to Drain “Miller” Charge-8.3-nC
-2800-pF
3951nC
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-12-ns
Rise Time-29-ns
Turn-Off D elay Time-36-ns
Fall Time-29-ns
Turn-Off Time--97ns
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 th ermal res istance R
A
is never exceeded.
JM
serve s as the basis for establ ishing the rating of the part.
TJMTA–()
P
----------------- ------------=
DM
R
θJA
In using surface mount devices such as the TO-263
package, the environment in which it is applied will have a
significant influence on the part’s current and maximum
power d issipati on rating s. Precise d etermin ation of P
comple x and influenced by many factors:
1. Mou nting pad area ont o which the device is attached and
whet her the re is copp er on one s ide or both side s of the
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 no n steady state applic ations, th e pulse widt h, the
duty cycle and the transient thermal response of the part,
the boa rd 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
positi on ed FR-4 bo ar d with 1oz c opper af t er 1000 se c on ds
of stea dy st ate pow er w ith n o air flow . Th is gr aph prov ides
the necessary information for calculation of the steady state
junction temperature or power dissipation. Pulse
applications can be evaluated using the Fairchild device
Spice t hermal model or manu ally utilizin g the normal ized
maximum transient thermal impedance curve.
DM
(oC/W)
θJA
(EQ. 1)
, in an
is
DM
60
C/W)
o
(
θJA
R
40
20
Figure 21. Thermal Resistance vs Mounting
R
= 26.51+ 19.84/(0.262+Area) EQ.2
θJA
R
= 26.51+ 128/(1.69+Area) EQ.3
θJA
(0.645)(6.45)(64.5)
AREA, TOP COPPER AREA in2 (cm2)
1100.1
Pad Area
FDB25 52 / FDP2552
Therma l resi stances correspondi ng to other copper are as
can be obtained from Figure 21 or by calculation using
Equation 2 or 3. Equation 2 is used for copper area defined
in inch es squ are and equ ation 3 is for area in cent imeters
square. The area, in square inches or square centimeters is
the top copper area including the gate and source pads.
ESLC 51 50 VALUE={(V(5,5 1)/ABS(V(5,51)))*(PWR (V (5,51)/(1e-6*75),3))}
.MODEL DbodyMOD D (IS=2.6E-11 N=1.09 RS=2.6e-3 TRS1=3.0e-3 TRS2=1.5e-6
+ CJO=1.9e-9 M= 0.62 TT=5.1e-8 X T I=4.2)
.MODEL DbreakMOD D (RS=0.3 TRS1=3.0e-3 TR S 2=-8.9e-6)
.MODEL DplcapMOD D (CJO=5.7e-10 IS=1.0e-30 N=10 M=0.58)
.MODEL MmedMOD NMOS (VTO=3.5 KP=6 IS=1e-30 N=10 TOX=1 L=1u W=1u RG=1.04)
.MODEL Mstro M OD NMOS (VTO=4.15 KP=80 IS=1e-30 N=10 T OX = 1 L=1u W=1u)
.MODEL Mwe akMOD NMOS (VTO=2.91 KP=0.03 IS=1e-30 N=10 TO X = 1 L=1u W=1u RG=10. 4 RS=0.1)
.MODEL RbreakMOD RES (TC1=1.1e-3 TC2=-2e-6)
.MODEL Rd rai nMOD RES (TC 1=8. 5 e-3 TC2=2.5e-5)
.MODEL RSLCMOD RES (TC1=3.4e-3 TC2=1.5e-6)
.MODEL RsourceMOD RES (TC 1=4.0e-3 TC2=1.0e-6)
.MODEL RvthresMOD RES (TC1=-4.3e-3 TC 2=-1.6e-5)
.MODEL RvtempMOD RES (T C1=-4.1e-3 TC 2=1. 5e-6)
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intended to be an exhaustive list of all such trademarks.
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Saving our world, 1mW/W/kW at a time™
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Solutions for Your Success™
SPM
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SuperSOT™-3
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SupreMOS
SyncFET™
Sync-Lock™
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THEREIN, WHICH COVERS THESE PRODUCTS.
FDB25 52 / FDP2552
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Definition of Terms
.
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No Identification NeededFull Production
ObsoleteNot In Production
Datasheet contains the design specifications for product development. Specifications
may change in any manner without notice.
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Datasheet contains specifications on a product that is discontinued by Fairchild
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