Thermal Resistance Junction to Case TO-2521.11
Thermal Resistance Junction to Ambient TO-252100
Thermal Resistance Junction to Ambient TO-252, 1in2 copper pad ar ea52
copy of the requirements, see AEC Q101 at: http://www.aecouncil.com/
Reliability data can be found at: http://www.fairchildsemi.com/products/discrete/reliability/index.html.
Drain t o Source Breakdown Volta geID = 250µA, VGS = 0V100--V
V
= 80V--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
I
Drain to Source On Resistance
= 44A, V
D
= 21A, VGS = 6V, -0.0310.047
D
I
=44A, VGS=10V, TC=175oC-0.0540.068
D
= 10V-0.0240.028
GS
Dynamic Characteristics
C
C
C
Q
Q
Q
Q
Q
ISS
OSS
RSS
g(TOT)
g(TH)
gs
gs2
gd
Input Capacitance
Output Capacitance-247-pF
Reverse Transfer Capacitance-62-pF
= 25V, VGS = 0V,
V
DS
f = 1MHz
Total G ate Ch arg e at 10 VVGS = 0V to 10V
Threshold Gate ChargeVGS = 0V to 2V-34.5nC
Gate to Source Gate Charge-8.6-nC
Gate Charge Threshold to Plateau-5.6-nC
V
DD
I
= 44A
D
I
= 1.0m A
g
= 50V
Gate to Drain “Miller” Charge-5.6-nC
-1710- pF
-2436nC
µA
ΩI
Resistive Switching Characteristics
t
ON
t
d(ON)
t
r
t
d(OFF)
t
f
t
OFF
Turn-On Time
Turn-On Delay Time-11-ns
Rise Time-59-ns
T u rn-Off Delay Time-26-ns
Fall Time-44-ns
Turn-Off Time--104ns
Drain-Source Diode Characteristics
V
SD
t
rr
Q
RR
Notes:
1: Starting T
2: Pulse Width = 100s
Source to Drain Di ode Voltage
Reverse Recovery TimeISD = 44A, dISD/dt =100A/µs- - 52ns
The maximum rated junction temperature, TJM, and the
thermal resistance of the heat dissipating path determines
the maxi mum al lowab le de vice p ower di ssip ation, 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
θJA
, in an
DM
(oC/W)
serve s as the basis for establ ishing 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
FDD3672
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 d issipati on rating s. Precise d etermin ation of P
comple x and influenced by many factors:
DM
is
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 20
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 board w ith 1oz co pp er af ter 1000 secon ds
of stea dy st ate pow er w ith n o air flow . Th is gr aph prov ides
the necessary inf ormation 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 utilizing the no rmalized
maximum transient thermal impedance curve.
25
0.010.1110
(0.645)(6.45)(64.5)(0.0645)
AREA, TOP COPPER AREA in2 (cm2)
Figure 20. Thermal Resistance vs Mounting
Pad Area
Therma l resi stances correspondi ng to other copper are as
can be obtained from Figure 20 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.
+ CJO=1.2e-9 M= 0.58 TT=3.75e -8 X T I=4.0)
.MODEL Db reakMOD D (RS= 15 T RS 1=4.0e-3 TRS2=-5.0e-6)
.MODEL DplcapMOD D (CJO=3.8e-10 IS=1.0e-30 N=10 M=0.60)
.ENDS
Note: For further discussion of the PSPICE model, consult A New PSPICE Sub-Circuit for the Power MOSFET Featuring Global Temperature Options; IEEE Power Electronics Specialist Conference Records, 1991, wri t ten by William J. Hepp and C. Frank
Wheatley.
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PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet IdentificationProduct StatusDefinition
Advance Inf or m ationForm a t ive or In
Design
PreliminaryFirst ProductionThis datasheet contains preliminary data, and
No Identificat ion NeededFull ProductionThis datasheet contains final specifications. Fairchild
ObsoleteNot In ProductionThis datasheet contains specifications on a product
This datasheet contains the design specifications for
product development. Specifi cations may change in
any manner without notice.
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
that has been disc ontinued by Fairchild se miconductor.
The datasheet is printed f or refe rence information only.
Rev. H7
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