PD-2.293 rev. A 12/97
181NQ... SERIES
SCHOTTKY RECTIFIER
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
range
I
FSM
@ tp = 5 µs sine
V
F
T
J
@ 180Apk, T
J
=125°C
range
180 Amp
Description/Features
Units
A
V
A
V
°C
The 181NQ high current Schottky rectifier module series has
been optimized for very low forward voltage drop, with moderate
leakage. 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 battery protection.
175° C T
J
operation
Unique high power, Half-Pak module
Replaces three parallel DO-5's
Easier to mount and lower profile than DO-5's
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
Very low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
181NQ...
180
35 to 45
22,000
0.56
- 55 to 175
CASE STYLE AND DIMENSIONS
Outline HALF PAK Module
Dimensions in millimeters and inches
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1
181NQ... Series
PD-2.293 rev. A 12/97
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
35
40
45
V
RWM
Max. Working Peak Reverse Voltage (V)
181NQ035
181NQ040
181NQ045
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward Current
* See Fig. 5
I
FSM
E
AS
I
AR
Max. Peak One Cycle Non-Repetitive
Surge Current * See Fig. 7
Non-Repetitive Avalanche Energy
Repetitive Avalanche Current
181NQ Units
180
22,000
2500
243
36
A
mJ
A
A
Conditions
50% duty cycle @ T
C
= 125° C, rectangular wave form
5µs Sine or 3µs Rect. pulse
10ms Sine or 6ms Rect. pulse
Following any rated
load condition and
with rated V
RRM
applied
T
J
= 25 °C, I
AS
= 36 Amps, L = 0.38 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
* See Fig. 1
(1)
181NQ Units
0.66
0.80
0.56
0.69
V
V
V
V
mA
mA
pF
nH
V/ µs
@ 180A
@ 360A
@ 180A
@ 360A
T
J
= 25 °C
T
J
= 125 °C
Conditions
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
C
T
L
S
Max. Reverse Leakage Current (1)
* See Fig. 2
Max. Junction Capacitance
Typical Series Inductance
15
135
7800
6.0
10,000
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25 °C
From the top of terminal hole to mounting plane
dv/dt Max. Voltage Rate of Change
(Rated V
R
)
(1) Pulse Width < 300µs, Duty Cycle < 2%
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
181NQ Units
-55 to 175
-55 to 175
0.30
0.10
°C
°C
°C/W
°C/W
DCoperation
Conditions
R
thJC
Max. Thermal Resistance Junction
to Case
R
thCS
Typical Thermal Resistance, Case to
Heatsink
wt
T
Approximate Weight
Mounting Torque
Terminal Torque
Case Style
Min.
Max.
Min.
Max.
* See Fig. 4
Mounting surface , smooth and greased
25.6 (0.9) g (oz.)
40 (35)
58 (50)
58 (50)
86 (75)
Non-lubricated threads
Kg-cm
(Ibf-in)
HALF PAK Module
2
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181NQ... Series
PD-2.293 rev. A 12/97
10
00
10
00
10
0
1
0
1 5C
2°
1
.
1
.0
1
2°
5C
.0
01
0
5
1 1 2 2 3 3 4 4
0 5 0 5 0 5 0 5
R v r eV lt g - V ( )
e es o a e R V
1 0C
0°
7°
5C
5°
0C
T =1 5C
7°
J
1 0C
5°
In ta ta e u F r a C r n - I ( )
s n n o s o w rd u re t
A
F
10
0
T =1 5 C
7°
J
T =1 5 C
2°
J
T= 2 °
5C
J
1
0
R v r eC rr n - I ( A
e es u e t
m)
R
Fig. 2 - Typical Values of Reverse Current
Vs. Reverse Voltage
100
00
J n tio C p c n - C ( F
u c n a a ita ce
p)
T
T =2 °
5C
J
1
0
.
2
.4
.
6
.8
1
10
00
0
1
0
2
0
3
0
4
0
5
0
F r a V lta eDo - V ( )
o w rd o g r p
V
F
M
R v r eV lta e- V (V
e es o g
R )
Fig. 1 - Maximum Forward Voltage Drop Characteristics
1
T e m l Im e a c -Z
h r a p d ne
( CW
° / )
th C
J
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
D=0 0
.5
.1
D=03
.3
D=0 5
.2
D=0 7
.1
D=0 8
.0
.1
0
P
M
D
t
1
t
2
N te :
o s
1 D tyfa to D= t1/ t2
. u
c r
S g P ls
in le u e
( h r a R s ta c )
T e m l e is n e
2 P a T =P xZ
. ek
+T
J D
M th C C
J
.0
1
.
1
1
1
0
10
0
.0 1
0
.0 0 1
00
.0 0
01
.0 1
0
t , R c n u r P ls D ra n( e o d )
e ta g la u e u tio S c n s
1
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
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3
181NQ... Series
PD-2.293 rev. A 12/97
10
8
A w b C s T m ea r - ( C
llo a le a e e p r tu e ° )
11 Q
8N
R J ( C =03 ° /
. 0 CW
th C D )
10
5
D=0 8
.0
D=0 7
.1
15
2
D=0 5
.2
D=0 3
.3
D=0 0
.5
10
0
7
5
5
0
2
5
0
0
D
C
10
7
10
6
A e g P w r L s - (W tts
v ra e o e o s
a )
R SL it
M im
10
5
D
C
10
4
10
3
0
4
0
8
0
10 10 20 20 20
2
6
0
4
8
4
0
8
0
10 10 20 20 20
2
6
0
4
8
A e g F rw r C r e t - IFA ) ( )
v ra e o a d u r n
( V A
A ea eF rw r C r e t - I
v r g o ad u r n
(A
)
FA )
( V
Fig. 5 - Maximum Allowable Case Temperature
Vs. Average Forward Current
100000
FSM
Fig. 6 - Forward Power Loss Characteristics
At Any Rated Load Condition
And With Rated V
RRM
Applied
Following Surge
Non-Repetitive Surge Current - I
(A)
10000
1000
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Maximum Non-Repetitive Surge Current
L
HIGH-SPEED
SWITCH
FREE-WHEEL
DIODE
40HFL40S02
Vd = 25 Volt
DUT
IRFP460
Rg = 25 ohm
+
CURRENT
MONITOR
Fig. 8 - Unclamped Inductive Test Circuit
4
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