Bulletin PD-20736 rev. B 10/02
400DMQ... SERIES
SCHOTTKY RECTIFIER
400 Amp
TO-244AB
isolated doubler
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
range
I
FSM
@ tp = 5 µs sine
V
F
T
J
@200Apk, T
J
=125°C
(per leg)
range
- 55 to 150
°C
35 to 45
29,000
0.52
V
A
V
Description/ Features
The 400DMQ high current, Schottky rectifier doubler module
series has been optimized for very low forward voltage drop,
with moderate leakage. The proprietary barrier technology
allows for reliable operation up to 150 °C junction temperature.
Typical applications are in switching power supplies, convert-
ers, free-wheeling diodes, welding, and reverse battery
protection.
150 °C T
J
operation
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
reliability
400DMQ... Units
400
A
1
2
3
Modified JEDEC
Outline TO-244AB Isolated
Dimensions in millimeters and (inches)
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1
400DMQ... Series
Bulletin PD-20736 rev. B 10/02
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
35
40
45
V
RWM
Max. Working Peak Reverse Voltage (V)
400DMQ035
400DMQ040
400DMQ045
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward Current
(Per Device)
I
FSM
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg)
E
AS
I
AR
Non-Repetitive Avalanche Energy
(Per Leg)
Repetitive Avalanche Current
(Per Leg)
29,000
3400
180
40
A
mJ
A
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
5µs Sine or 3µs Rect. pulse
T
J
= 25 °C, I
AS
= 40 Amps, L = 0.22 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
400DMQ Units
400
A
Conditions
50% duty cycle @ T
C
= 70 °C, rectangular wave form
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(Per Leg) * See Fig. 1
(1)
400DMQ Units
0.57
0.73
0.52
0.68
V
V
V
V
mA
A
pF
nH
V/ µs
@ 200A
@ 400A
@ 200A
@ 400A
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
(Per Leg) * See Fig. 2
(1)
Max. Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
(Rated V
R
)
20
1
10,300
5.0
10000
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25°C
From top of terminal hole to mounting plane
dv/dt Max. Voltage Rate of Change
Thermal-Mechanical Specifications
Parameters
T
J
T
stg
Max. Junction Temperature Range
Max. Storage Temperature Range
(1) Pulse Width < 300µs, Duty Cycle <2%
400DMQ Units
-55 to 150
-55 to 150
0.4
0.2
0.1
°C
°C
Conditions
R
thJC
Max. Thermal Resistance Junction
to Case (Per Leg)
R
thJC
Max. Thermal Resistance Junction
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
to Heatsink
wt
T
Approximate Weight
Mounting Torque Base
Mou ue Center Hole
TerminalTorque
Case Style
°C/W DC operation
°C/W DC operation
* See Fig. 4
°C/W Mounting surface , smooth and greased
79 (2.80) g (oz.)
Min.
24(20)
Max.
35 (30)
Kg-cm
Typ.
13.5 (12)
(Ibf-in)
Min.
35 (30)
Max.
46 (40)
TO - 244AB isolated doubler Modified JEDEC
2
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400DMQ... Series
Bulletin PD-20736 rev. B 10/02
1000
10000
1000
Reverse Current - I
R
(mA)
T J = 150˚C
125˚C
100
10
1
100˚C
75˚C
50˚C
25˚C
100
Instantaneous Forward Current - I
F
(A)
0.1
T = 150˚C
J
0.01
0
10
20
30
40
50
Reverse Voltage - V
R
(V)
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage
T
J
= 125˚C
T
J
= 25˚C
10000
Junction Capacitance - C
T
(pF)
10
T = 25˚C
J
1
0
0.3
0.6
0.9
1.2
Forward Voltage Drop - V
FM
(V)
Fig. 1 - Max. Forward Voltage Drop Characteristics
1000
0
10
20
30
40
50
Reverse Voltage - V
R
(V)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage
1
Thermal Impedance Z
thJC
(°C/W)
D = 0.75
D = 0.50
D = 0.33
D = 0.25
D = 0.20
0.1
P
DM
t1
t2
0.01
Single Pulse
(Thermal Resistance)
Notes:
1. Duty factor D = 1 / t
t 2
2. Peak T
J
= P
DM
x Z
thJC
+ T
C
0.001
0.00001
0.0001
0.001
0.01
0.1
1
10
t
1
, Rectangular Pulse Duration (Seconds)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics
100
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3
400DMQ... Series
Bulletin PD-20736 rev. B 10/02
180
Allowable Case Temperature (°C)
Average Power Loss (Watts)
500
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
150
120
DC
400
RMS Limit
300
90
60
Square wave (D = 0.50)
80% Rated V applied
R
200
DC
30
see note (2)
100
0
0
200
400
600
Average Forward Current - I
F(AV)
(A)
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current
0
0
100
200
300
400
500
600
Average Forward Current - I
F(AV)
(A)
Fig. 6 - Forward Power Loss Characteristics
100000
Non-Repetitive Surge Current - I
FSM
(A)
At Any Rated Load Condition
And With Rated VRRM Applied
Following Surge
10000
1000
10
100
1000
10000
Square Wave Pulse Duration - t
p
(microsec)
Fig. 7 - Max. Non-Repetitive Surge Current
L
HIGH-SPEED
SWITCH
FREE-WHEEL
DIODE
40HFL40S02
+
DUT
IRFP460
Rg = 25 ohm
Vd = 25 Volt
CURRENT
MONITOR
Fig. 8 - Unclamped Inductive Test Circuit
(2)
Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward Power Loss = I
F(AV)
x V
FM
@ (I
F(AV)
/
D) (see Fig. 6);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D); I
R
@ V
R1
= 80% rated V
R
4
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400DMQ... Series
Bulletin PD-20736 rev. B 10/02
Data and specifications subject to change without notice.
This product has been designed and qualified for Industrial Level.
Qualification Standards can be found on IR's Web site.
IR WORLD HEADQUARTERS:
233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7309
Visit us at www.irf.com for sales contact information. 10/02
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