SCHOTTKY RECTIFIER 8 Amp
8TQ... SERIES
PD-2.238 rev. A 12/97
1www.irf.com
Dimensions in millimeters and inches
Conforms to JEDEC Outline TO - 220AC
CASE STYLE AND DIMENSIONS
Major Ratings and Characteristics
IF(AV) Rectangular 8 A
waveform
VRRM range 80 to 100 V
IFSM @ tp = 5 µs sine 850 A
VF@ 8 Apk, TJ
= 125°C 0.58 V
TJrange - 55 to 175 °C
Characteristics 8TQ... Units
Description/Features
The 8TQ Schottky rectifier series has been optimized for low
reverse leakage at high temperature. The proprietary barrier
technology allows for reliable operation up to 175° C junction
temperature. Typical applications are in switching power
supplies, converters, free-wheeling diodes, and reverse bat-
tery protection.
175° C TJ operation
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
8TQ... Series
2
PD-2.238 rev. A 12/97
www.irf.com
VFM Max. Forward Voltage Drop (1) 0.72 V @ 8A
* See Fig. 1 0.88 V @ 16A
0.58 V @ 8A
0.69 V @ 16A
IRM Max. Reverse Leakage Current (1) 0.55 mA TJ = 25 °C
* See Fig. 2 7 m A TJ = 125 °C
CTMax. Junction Capacitance 500 p F VR = 5VDC, (test signal range 100Khz to 1Mhz) 25 °C
LSTypical Series Inductance 8 n H Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change 10,000 V/ µ s
(Rated VR)
TJ = 25 °C
TJ = 125 °C
VR = rated VR
Electrical Specifications
Parameters 8TQ Units Conditions
(1) Pulse Width < 300µs, Duty Cycle < 2%
TJMax. Junction Temperature Range -55 to 175 °C
Tstg Max. Storage Temperature Range -55 to 175 °C
RthJC Max. Thermal Resistance Junction 2.0 °C/W DC operation * See Fig. 4
to Case
RthCS Typical Thermal Resistance, Case to 0.50 °C/W Mounting surface , smooth and greased
Heatsink
wt Approximate Weight 2 (0.07)g (oz.)
T Mounting Torque Min. 6 (5)
Max. 12 (10)
Case Style TO-220AC JEDEC
Kg-cm
(Ibf-in)
Thermal-Mechanical Specifications
Parameters 8TQ Units Conditions
Part number 8TQ080 8TQ100
VRMax. DC Reverse Voltage (V)
VRWM Max. Working Peak Reverse Voltage (V)
Voltage Ratings
IF(AV) Max. Average Forward Current 8 A 50% duty cycle @ TC = 157° C, rectangular wave form
* See Fig. 5
IFSM Max. Peak One Cycle Non-Repetitive 850 5µs Sine or 3µs Rect. pulse
Surge Current * See Fig. 7 230 10ms Sine or 6ms Rect. pulse
EAS Non-Repetitive Avalanche Energy 7.50 mJ TJ = 25 °C, IAS
= 0.50 Amps, L = 60 mH
IAR Repetitive Avalanche Current 0.50 A Current decaying linearly to zero in 1 µsec
Frequency limited by TJ max. VA = 1.5 x VR typical
Parameters 8TQ Units Conditions
Absolute Maximum Ratings
AFollowing any rated
load condition and
with rated VRRM applied
80 100
8TQ... Series
3
PD-2.238 rev. A 12/97
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Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
Fig. 4 - Maximum Thermal Impedance ZthJC
Characteristics
Fig. 1 - Maximum Forward Voltage Drop Characteristics
.1
1
10
100
1000
0.2.4.6.811.21.41.61.822.
2
FM
F
Instantaneo us Forward Current - I (A)
T = 175°C
T = 125°C
T = 25°C
J
J
J
Forw ard Voltag e Dro p - V (V )
.001
.01
.1
1
10
.00001 .0001 .001 .01 .1 1 10 10
0
D = 0.33
D = 0.50
D = 0.25
D = 0.17
D = 0.08
1
thJC
t , Recta ngular Pulse D u ra tion (S econd s)
Thermal Im peda nce - Z (°C/W)
Sin g le Pu ls e
(Thermal Resistance)
2
t
1
t
P
DM
Notes:
1. Duty factor D = t / t
2. Pe a k T = P x Z + T
1
JDMthJCC
2
100
1000
010203040506070809010011
0
T = 25°C
J
R eve rse V o lta ge - V (V )
R
T
Junction Capacitance - C (pF)
.0001
.001
.01
.1
1
10
100
02040608010
0
R
R
T = 175°C
150°C
125°C
100°C
75°C
50°C
25°C
J
R everse V oltage - V (V)
Re v e r s e Cur re n t - I ( mA)
8TQ... Series
4
PD-2.238 rev. A 12/97
www.irf.com
Fig. 8 - Unclamped Inductive Test Circuit
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current Fig. 6 - Forward Power Loss Characteristics
Fig. 7 - Maximum Non-Repetitive Surge Current
160
165
170
175
180
02468101
2
DC
Allowable Case Tempe ra ture - (°C)
A verage F orw ard C u r ren t - I ( A)
F(AV)
8TQ
R (DC) = 2.0°C/W
thJC
0
1
2
3
4
5
6
7
02468101
2
DC
Average Power Loss - (Watts)
F(AV)
D = 0.08
D = 0.17
D = 0.25
D = 0.33
D = 0.50
RMS Limit
Averag e Fo r w a r d Cu rre n t - I ( A)
100
1000
10 100 1000 10000
FSM
p
N on-Repet i tive Sur ge Current - I (A)
At Any Rated Load Condition
And With Rated V Ap plied
Following Surge
RRM
S quare Wave P ul se Durati on - t (mi crosec )
FREE-WHEEL
DIODE
40HFL40S02
CURRENT
MONITOR
HIGH-SPEED
SWITCH
IRFP460
L
DUT
Rg = 25 ohm Vd = 25 Volt
+
