RURD4120, RURD4120S
Data Sheet January 2000
4A, 1200V Ultrafast Diodes
The RURD4120 and RURD4120S are ultrafast diodes with
soft recovery characteristics (t
< 70ns). They have low
rr
forward voltage drop and are silicon nitride passivated
ion-implanted epitaxial planar construction.
These devices are intended for use as freewheeling/
clamping diodes and rectifiers in a variety of switchingpower
supplies and other power switching applications. Their low
stored charge and ultrafast soft recovery minimize ringing
and electrical noise in many power switching circuits
reducing power loss in the switching transistors.
Formerly developmental type TA49036.
Ordering Information
PART NUMBER PACKAGE BRAND
RURD4120 TO-251 UR4120
RURD4120S TO-252 UR4120
NOTE: Whenordering, usethe entirepart number.Add the suffix 9A
to obtain the TO-252 variant in the tape and reel, i.e.,
RURD4120S9A.
File Number 3641.3
Features
• Ultrafast with Soft Recovery . . . . . . . . . . . . . . . . . . .<70ns
• Operating Temperature. . . . . . . . . . . . . . . . . . . . . . .175
o
• Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . .1200V
• Avalanche Energy Rated
• Planar Construction
Applications
• Switching Power Supplies
• Power Switching Circuits
• General Purpose
Packaging
JEDEC STYLE TO-251
ANODE
CATHODE
CATHODE
(FLANGE)
C
Symbol
K
A
Absolute Maximum Ratings T
Peak Repetitive Reverse Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
Working Peak Reverse Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
DC Blocking Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
Average Rectified Forward Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I
(TC = 152oC)
Repetitive Peak Surge Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I
(Square Wave, 20kHz)
Nonrepetitive Peak Surge Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I
(Halfwave, 1 Phase, 60Hz)
Maximum Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P
Avalanche Energy (See Figures 10 and 11).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E
Operating and Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T
= 25oC, Unless Otherwise Specified
C
RRM
RWM
F(AV)
FRM
FSM
STG
AVL
, T
JEDEC STYLE TO-252
CATHODE
CATHODE
ANODE
RURD4120, RURD4120S UNITS
1200 V
1200 V
R
D
J
1200 V
4A
8A
40 A
50 W
10 mJ
-65 to 175
(FLANGE)
o
C
1
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 2000
RURD4120, RURD4120S
Electrical Specifications T
= 25oC, Unless Otherwise Specified
C
SYMBOL TEST CONDITION MIN TYP MAX UNITS
V
F
IF = 4A - - 2.1 V
IF = 4A, TC = 150oC - - 1.9 V
I
R
VR = 1200V - - 100 µA
VR = 1200V, TC = 150oC - - 500 µA
t
rr
IF = 1A, dIF/dt = 200A/µs--70ns
IF = 4A, dIF/dt = 200A/µs--90ns
t
a
t
b
Q
RR
C
J
R
θJC
IF = 4A, dIF/dt = 200A/µs - 40 - ns
IF = 4A, dIF/dt = 200A/µs - 28 - ns
IF = 4A, dIF/dt = 200A/µs - 335 - nC
VR = 10V, IF = 0A - 15 - pF
--3oC/W
DEFINITIONS
VF = Instantaneous forward voltage (pw = 300µs, D = 2%).
IR = Instantaneous reverse current.
trr= Reverse recovery time (See Figure 9), summation of ta+tb.
ta = Time to reach peak reverse current (See Figure 9).
tb = Time from peak IRM to projected zero crossing of IRM based on a straight line from peak IRM through 25% of IRM (See Figure 9).
QRR = Reverse recovery time.
CJ = Junction capacitance.
R
= Thermal resistance junction to case.
θJC
pw = Pulse width.
D = Duty cycle.
Typical Performance Curves
20
10
175oC
, FORWARD CURRENT (A)
F
1
I
0.5
0 0.5 1 1.5 2 2.5 3
100oC
VF, FORWARD VOLTAGE (V)
FIGURE 1. FORWARD CURRENT vs FORWARD VOLTAGE
25oC
100
10
1
0.1
, REVERSE CURRENT (µA)
0.01
R
I
0.001
200
0 400 800 1200600 1000
VR, REVERSE VOLTAGE (V)
175oC
100oC
25oC
FIGURE 2. REVERSE CURRENT vs REVERSE VOLTAGE
2
RURD4120, RURD4120S
Typical Performance Curves (Continued)
75
60
45
30
t, RECOVERY TIMES (ns)
15
0
0.5
TC = 25oC, dIF/dt = 200A/µs
t
rr
t
a
t
b
IF, FORWARD CURRENT (A)
41
100
80
60
40
t, RECOVERY TIMES (ns)
20
0
0.5
TC = 100oC, dIF/dt = 200A/µs
t
rr
t
a
t
b
IF, FORWARD CURRENT (A)
FIGURE 3. trr,taAND tbCURVES vs FORWARD CURRENT FIGURE 4. trr,taAND tbCURVES vs FORWARDCURRENT
125
100
75
50
t, RECOVERY TIMES (ns)
25
0
0.5
TC = 175oC, dIF/dt = 200A/µs
t
rr
t
a
t
b
IF, FORWARD CURRENT (A)
41
5
4
3
2
1
, AVERAGE FORWARD CURRENT (A)
F(AV)
0
I
125 135 155 175165
T
SQ. WAVE
145
, CASE TEMPERATURE (oC)
C
DC
41
FIGURE 5. trr,taAND tbCURVES vs FORWARDCURRENT FIGURE 6. CURRENT DERATING CURVE
75
60
45
30
15
, JUNCTION CAPACITANCE (pF)
J
C
0
0 50 100 150 200
VR, REVERSE VOLTAGE (V)
FIGURE 7. JUNCTION CAPACITANCE vs REVERSE VOLTAGE
3
Test Circuits and Waveforms
VGE AMPLITUDE AND
RG CONTROL dIF/dt
t
1 ANDt2
CONTROL I
F
L
RURD4120, RURD4120S
DUT
CURRENT
R
G
V
GE
t
1
t
2
IGBT
SENSE
+
V
DD
-
0
dI
F
I
F
dt
t
rr
t
a
FIGURE 8. trr TEST CIRCUIT FIGURE 9. trr WAVEFORMS AND DEFINITIONS
I = 1A
L = 20mH
R < 0.1Ω
E
AVL
= IGBT (BV
Q
1
= 1/2LI2 [V
R(AVL)
CES
/(V
> DUT V
Q
R(AVL)
R(AVL)
1
- VDD)]
)
CURRENT
DUT
SENSE
LR
+
V
V
-
DD
DD
IV
V
AVL
I
L
t
0
I
L
t
1
t
2
FIGURE 10. AVALANCHE ENERGY TEST CIRCUIT FIGURE 11. AVALANCHE CURRENT AND VOLTAGE
WAVEFORMS
t
b
0.25 I
RM
I
RM
t
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