S E M I C O N D U C T O R
RURU75120
75A, 1200V Ultrafast Diode
Package
JEDEC STYLE SINGLE LEAD TO-218
ANODE
April 1995
Features
• Ultrafast with Soft Recovery . . . . . . . . . . . . . . . . <125ns
• Operating Temperature . . . . . . . . . . . . . . . . . . . . +175
o
C
• Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 1200V
• Avalanche Energy Rated
• Planar Construction
CATHODE
(FLANGE)
Applications
• Switching Power Supplies
• Power Switching Circuits
• General Purpose
Symbol
K
Description
The RURU75120 (TA49032) is an ultrafast diode with soft
recovery characteristics (t
RR
< 125ns). It has low forward
voltage drop and is silicon nitride passivated ion-implanted
epitaxial planar construction.
This device is intended for use as a freewheeling/clamping
diode and rectifier in a variety of switching power supplies
and other power switching applications. Its low stored
charge and ultrafast recovery with soft recovery characteris-
tic minimize ringing and electrical noise in many power
switching circuits reducing power loss in the switching tran-
sistors.
PACKAGING AVAILABILITY
PART NUMBER
RURU75120
PACKAGE
TO-218
BRAND
RURU75120
A
NOTE: When ordering, use the entire part number.
Absolute Maximum Ratings
T
C
= +25
o
C
RURU75120
1200
1200
1200
75
150
500
190
50
-65 to +175
UNITS
V
V
V
A
A
A
W
mj
o
C
Peak Repetitive Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V
RRM
Working Peak Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
RWM
DC Blocking Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
R
Average Rectified Forward Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I
F(AV)
(T
C
= +56.75
o
C)
Repetitive Peak Surge Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I
FSM
(Square Wave, 20kHz)
Nonrepetitive Peak Surge Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I
FSM
(Halfwave, 1 Phase, 60Hz)
Maximum Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P
D
Avalanche Energy (L = 40mH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E
AVL
Operating and Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T
STG
, T
J
Copyright © Harris Corporation 1995
File Number
5-109
3413.2
Specifications RURU75120
Electrical Specifications
T
C
= +25
o
C, Unless Otherwise Specified
LIMITS
SYMBOL
V
F
V
F
I
R
I
R
t
RR
t
RR
t
A
t
B
R
θJC
DEFINITIONS
V
F
= Instantaneous forward voltage (pw = 300µs, D = 2%).
I
R
= Instantaneous reverse current.
t
RR
= Reverse recovery time summation of t
A
+ t
B
.
t
A
= Time to reach peak reverse current (See Figure 2).
t
B
= Time from peak I
RM
to projected zero crossing of I
RM
based on a straight line from peak I
RM
through 25% of I
RM
(See Figure 2).
R
θJC
= Thermal resistance junction to case.
E
AVL
= Controlled avalanche energy (See Figures 7 and 8).
pw = pulse width.
D = duty cycle.
I
F
= 75A
I
F
= 75A
V
R
= 1200V
V
R
= 1200V
I
F
= 1A, dI
F
/dt = 100A/µs
I
F
= 75A, dI
F
/dt = 100A/µs
I
F
= 75A, dI
F
/dt = 100A/µs
I
F
= 75A, dI
F
/dt = 100A/µs
T
C
= +150
o
C
T
C
=
+150
o
C
TEST
CONDITION
MIN
-
-
-
-
-
-
-
-
-
TYP
-
-
-
-
-
-
90
65
-
MAX
2.1
V
1.9
500
2
125
200
-
-
0.8
o
C/W
UNITS
µA
mA
ns
V
1
AMPLITUDE CONTROLS I
F
V
2
AMPLITUDE CONTROLS dI
F
/dt
L
1
= SELF INDUCTANCE OF
R
4
+ L
LOOP
R
1
Q
1
+V
1
0
t
2
t
1
R
2
+V
3
Q
2
t
1
≥
5t
A(MAX)
t
2
> t
RR
t
3
> 0
L
1
t
A(MIN)
≤
R
4
10
L
LOOP
DUT
Q
4
0
0.25 I
RM
I
RM
C1
R
4
-V
4
V
RM
V
R
I
F
dI
F
dt
t
A
t
RR
t
B
t
3
0
-V
2
R
3
Q
3
FIGURE 1. t
RR
TEST CIRCUIT
FIGURE 2. t
RR
WAVEFORMS AND DEFINITIONS
5-110
RURU75120
Typical Performance Curves
FIGURE 3. TYPICAL FORWARD CURRENT vs FORWARD
VOLTAGE DROP
FIGURE 4. TYPICAL REVERSE CURRENT vs VOLTAGE
FIGURE 5. TYPICAL t
RR
, t
A
AND t
B
CURVES vs FORWARD
CURRENT
IMAX = 1A
L = 40mH
R < 0.1Ω
EAVL = 1/2LI
2
[VAVL/(VAVL - V
DD
)]
Q
1
AND Q
2
ARE 1000V MOSFETs
Q
1
FIGURE 6. CURRENT DERATING CURVE FOR ALL TYPES
L
R
+
V
DD
130Ω
1MΩ
DUT
VAVL
12V
Q
2
130Ω
CURRENT
SENSE
I V
V
DD
I
L
I
L
-
12V
t
0
t
1
t
2
t
FIGURE 7. AVALANCHE ENERGY TEST CIRCUIT
FIGURE 8. AVALANCHE CURRENT AND VOLTAGE WAVE-
FORMS
5-111
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