Preliminary Data Sheet PD-20572 11/98
40CTQ045L
SCHOTTKY RECTIFIER
40 Amp
TO-262
Major Ratings and Characteristics
Characteristics
I
F(AV)
Rectangular
waveform
V
RRM
I
FSM
@ tp = 5 µs sine
V
F
T
J
@ 20 Apk, T
J
= 125°C
(per leg)
range
45
1240
0.48
V
A
V
Description/Features
The 40CTQ045L center tap Schottky rectifier 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, converters, free-
wheeling diodes, and reverse battery protection.
150° C T
J
operation
Center tap TO-262 package
Low forward voltage drop
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
40CTQ...L Units
40
A
- 55 to 150
°C
BASE
COMMON
CATHODE
2
1
2
3
ANODE COMMON ANODE
CATHODE
1
2
Modified JEDEC outline TO-262
Dimensions in millimeters and inches
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40CTQ045L
Preliminary Data Sheet PD-20572
11/98
Voltage Ratings
Part number
V
R
Max. DC Reverse Voltage (V)
45
V
RWM
Max. Working Peak Reverse Voltage (V)
40CTQ045L
Absolute Maximum Ratings
Parameters
I
F(AV)
Max. Average Forward
Current
I
FSM
E
AS
I
AR
* See Fig. 5
(Per Leg)
(Per Device)
40CTQ...L Units
20
40
1240
350
20
3
mJ
A
A
A
Conditions
50% duty cycle @ T
C
= 116°C, rectangular wave form
5µs Sine or 3µs Rect. pulse
Following any rated
load condition and with
10ms Sine or 6ms Rect. pulse rated V
RRM
applied
T
J
= 25 °C, I
AS
= 3 Amps, L = 4.40 mH
Current decaying linearly to zero in 1 µsec
Frequency limited by T
J
max. V
A
= 1.5 x V
R
typical
Max. Peak One Cycle Non-Repetitive
Surge Current (Per Leg) * See Fig. 7
Non-Repetitive Avalanche Energy
(Per Leg)
Repetitive Avalanche Current
(Per Leg)
Electrical Specifications
Parameters
V
FM
Max. Forward Voltage Drop
(Per Leg) * See Fig. 1
(1)
40CTQ...L Units
0.53
0.68
0.48
0.67
3
115
0.27
8.72
2800
8.0
10,000
V
V
V
V
mA
mA
V
m
Ω
Conditions
@ 20A
@ 40A
@ 20A
@ 40A
T
J
= 25 °C
T
J
= 125 °C
T
J
= T
J
max.
T
J
= 25 °C
T
J
= 125 °C
V
R
= rated V
R
I
RM
Max. Reverse Leakage Current
(Per Leg) * See Fig. 2
(1)
V
F(TO)
Threshold Voltage
r
t
C
T
L
S
Forward Slope Resistance
Max. Junction Capacitance (Per Leg)
Typical Series Inductance (Per Leg)
pF
nH
V/ µs
V
R
= 5V
DC
, (test signal range 100Khz to 1Mhz) 25°C
Measured lead to lead 5mm from package body
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
to Case (Per Leg) * See Fig. 4
R
thJC
Max. Thermal Resistance Junction
to Case (Per Package)
R
thCS
Typical Thermal Resistance, Case
to Heatsink
wt
Approximate Weight
T
Mounting Torque
Case Style
Min.
Max.
0.50
2 (0.07)
6 (5)
12 (10)
°C/W Mounting surface , smooth and greased
g (oz.)
Kg-cm
(Ibf-in)
JEDEC
1.0
°C/W DCoperation
40CTQ...L Units
-55 to 150
-55 to 150
2.0
°C
°C
Conditions
R
thJC
Max. Thermal Resistance Junction
°C/W DCoperation
TO-262
2
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40CTQ045L
Preliminary Data Sheet PD-20572
11/98
1000
1000
100
10
1
50°C
0.1
25°C
0.01
0.001
0
5
10
15
20
25
30
35
40
45
Reverse Voltage - V
R
(V)
T
J
= 150°C
125°C
100°C
75°C
(A)
Instantaneous Forward Current - I
F
100
Reverse Current - I
R
(mA)
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
10000
(pF)
T
10
T
J
= 150°C
T
J
= 125°C
T
J
= 25°C
Junction Capacitance - C
T
J
= 25°C
1000
1
0
0.2
0.4
0.6
0.8
1
1.2
FM
100
1.4
(V)
1.6
1.8
0
10
20
30
40
50
Forward Voltage Drop - V
Reverse Voltage - V
R
(V)
Fig. 1 - Max. Forward Voltage Drop Characteristics
(Per Leg)
10
Thermal Impedance Z
thJC
(°C/W)
Fig. 3 - Typical Junction Capacitance
Vs. Reverse Voltage (Per Leg)
1
D
D
D
D
D
=
=
=
=
=
0.75
0.50
0.33
0.25
0.20
P
DM
0.1
Notes:
Single Pulse
(Thermal Resistance)
0.01
0.00001
t1
t2
1. Duty factor D = t 1/ t 2
2. Peak T
J
= P
DM
x Z
thJC
+ T
C
0.1
1
10
100
0.0001
0.001
0.01
t 1 , Rectangular Pulse Duration (Seconds)
Fig. 4 - Max. Thermal Impedance Z
thJC
Characteristics (Per Leg)
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40CTQ045L
Preliminary Data Sheet PD-20572
11/98
150
Allowable Case Temperature - (°C)
145
140
135
130
125
120
115
110
105
100
0
5
10
15
20
25
30
Average Forward Current - I
F(AV)
(A)
see note (2)
18
16
Average Power Loss - (Wat ts)
14
12
10
8
6
4
2
0
0
5
10
15
20
25
30
Average Forward Current - I
F(AV)
(A)
D = 0.20
D = 0.25
D = 0.33
D = 0.50
D = 0.75
RMS Limit
DC
DC
Square wave (D = 0.50)
80% Rated V applied
R
Fig. 5 - Max. Allowable Case Temperature
Vs. Average Forward Current (Per Leg)
Non-Repetitive Surge Current - I
FSM
(A)
10000
At Any Rated Load Condition
And With Rated V
RRM
Applied
Following Surge
Fig. 6 - Forward Power Loss Characteristics
(Per Leg)
1000
100
10
100
1000
10000
Square Wave Pulse Duration - t p (microsec)
Fig. 7 - Max. Non-Repetitive Surge Current (Per Leg)
L
HIGH-SPEED
SWITCH
FREE-WHEEL
DIODE
40HFL40S02
Vd = 25 Volt
DUT
IRFP460
Rg = 25 ohm
+
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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40CTQ045L
Preliminary Data Sheet PD-20572
11/98
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