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PD-2.466 rev. B 12/98
Reduced RFI and EMI
Reduced Snubbing
Extensive Characterization of
Recovery Parameters
Features
Description
HEXFRED
TM
diodes are optimized to reduce losses and EMI/RFI in high frequency
power conditioning systems. An extensive characterization of the recovery
behavior for different values of current, temperature and di/dt simplifies the
calculations of losses in the operating conditions. The softness of the recovery
eliminates the need for a snubber in most applications. These devices are ideally
suited for power converters, motors drives and other applications where
switching losses are significant portion of the total losses.
Ultrafast, Soft Recovery Diode
HEXFRED
TM
HFA120MD40C
LUG
TERMINAL
ANODE 1
LUG
TERMINAL
ANODE 2
LUG
TERMINAL
CATHODE
V
R
= 400V
V
F
(typ.)
= 0.9V
I
F(AV)
= 120A
Q
rr
(typ.) = 420nC
I
RRM
(typ.)
= 9.3A
t
rr
(typ.)
= 36ns
di
(rec)M
/dt (typ.)
= 260A/s
Isolated Base
Parameter
Min.
Typ.
Max.
Units
R
thJC
Junction-to-Case, Single Leg Conducting
0.70
Junction-to-Case, Both Legs Conducting
0.35
R
thCS
Case-to-Sink, Flat , Greased Surface
0.10
Wt
Weight
79 (2.8)
g (oz)
Mounting Torque
30 (3.4)
40 (4.6)
Terminal Torque
30 (3.4)
40 (4.6)
Vertical Pull
80
2 inch Lever Pull
35
Parameter
Max.
Units
V
R
Cathode-to-Anode Voltage
400
V
I
F
@ T
C
= 25C
Continuous Forward Current
111
I
F
@ T
C
= 100C
Continuous Forward Current
53
I
FSM
Single Pulse Forward Current
600
E
AS
Non-Repetitive Avalanche Energy
1.4
mJ
P
D
@ T
C
= 25C
Maximum Power Dissipation
179
P
D
@ T
C
= 100C
Maximum Power Dissipation
71
T
J
Operating Junction and
T
STG
Storage Temperature Range
Note: Limited by junction temperature
Mounting surface must be smooth, flat, free or burrs or other
L = 100H, duty cycle limited by max T
J
protrusions. Apply a thin even film or thermal grease to mounting
125C
surface. Gradually tighten each mounting bolt in 5-10 lbfin steps
until desired or maximum torque limits are reached. Module
Absolute Maximum Ratings (per Leg)
C/W
K/W
-55 to +150
W
A
C
Thermal - Mechanical Characteristics
lbfin
(Nm)
lbfin
1
TO-244AB
(ISOLATED)
HFA120MD40C
2
PD-2.466 rev. B 12/98
14.99 (0.590)
92.71 (3.650)
90.17 (3.550)
3.02 (0.119)
3.35 (0.132)
(2 PLCS.)
20.42 (0.804)
23.55 (0.927)
6.99 (0.275)
7.49 (0.295)
DIA.
34.925 (1.375)
60.96 (2.400)
63.50 (2.500)
REF.
80.01 (3.150)
40.26 (1.585)
39.75 (1.565)
15.75 (0.620)
1/4-20 SLOTTED HEX
17.78 (0.700)
20.32 (0.800)
1
2
3
OUTLINE TO-244AB (ISOLATED)
Dimensions in Millimeters and (Inches)
LEAD ASSIGNMENTS
1 - ANODE
2 - CATHODE
3 - ANODE
Parameter
Min. Typ. Max. Units Test Conditions
t
rr
Reverse Recovery Time
36
I
F
= 1.0A, di
f
/dt = 200A/s, V
R
= 30V
t
rr1
90
140
ns T
J
= 25C
See
t
rr2
160 240
T
J
= 125C Fig. 5
I
F
= 80A
I
RRM1
Peak Recovery Current
9.3
17
T
J
= 25C
See
I
RRM2
15
30
T
J
= 125C Fig. 6
V
R
= 200V
Q
rr1
Reverse Recovery Charge
420 1100
T
J
= 25C
See
Q
rr2
1200 3200
T
J
= 125C Fig. 7
di
f
/dt = 200A/s
di
(rec)M
/dt1 Peak Rate of Fall of Recovery Current
360
T
J
= 25C
See
di
(rec)M
/dt2 During t
b
260
T
J
= 125C Fig. 8
Parameter
Min. Typ. Max. Units
Test Conditions
V
BR
Cathode Anode Breakdown Voltage
400
V
I
R
= 100A
V
FM
Max Forward Voltage
1.0
1.2
I
F
= 60A
1.2
1.4
V
I
F
= 120A
0.90 1.1
I
F
= 60A, T
J
= 125C
I
RM
Max Reverse Leakage Current
1.0
6.0
A
V
R
= V
R
Rated
1.5
8.0
mA
T
J
= 125C, V
R
= 320V
C
T
Junction Capacitance
180 260
pF
V
R
= 200V
From top of terminal hole to mounting
plane
Electrical Characteristics (per Leg) @ T
J
= 25C (unless otherwise specified)
A/s
nC
A
L
S
Series Inductance
7.0
nH
See Fig. 3
See Fig. 2
See Fig. 1
Dynamic Recovery Characteristics (per Leg) @ T
J
= 25C (unless otherwise specified)
HFA120MD40C
3
PD-2.466 rev. B 12/98
Fig. 4 - Maximum Thermal Impedance Z
thjc
Characteristics, (per Leg)
Fig. 2 - Typical Reverse Current vs. Reverse
Voltage, (per Leg)
Fig. 3 - Typical Junction Capacitance vs.
Reverse Voltage, (per Leg)
Fig. 1 - Maximum Forward Voltage Drop
vs. Instantaneous Forward Current,
(per Leg)
0.1
1
10
100
1000
10000
0
100
200
300
400
R
R
Reverse Voltage - V (V)
T = 150C
Reverse Cu
rrent -
I (
A)
T = 125C
T = 25C
J
J
J
100
1000
10000
1
10
100
1000
T = 25C
J
Reverse Voltage - V (V)
R
T
Ju
nction
Capacit
ance - C
(pF)
A
0.001
0.01
0.1
1
0.00001
0.0001
0.001
0.01
0.1
1
10
100
1
th
J
C
t , Rectangular Pulse Duration (Seconds)
D = 0.50
D = 0.33
D = 0.25
D = 0.17
D = 0.08
Single Pulse
(Thermal Resistance)
T
h
e
r
m
a
l Im
p
e
d
a
n
c
e
-
Z
(
K
/W)
2
t
1
t
P
DM
Notes:
1. Duty factor D = t / t
2. Peak T = P x Z + T
J
DM
thJC
C
2
1
1
10
100
1000
0.4
0.8
1.2
1.6
2.0
FM
F
Insta
ntan
eou
s Forwa
rd Curre
nt -
I (A
)
Forward Voltage Drop - V (V)
T = 150C
T = 125C
T = 25C
J
J
J
HFA120MD40C
4
PD-2.466 rev. B 12/98
Fig. 7 - Typical Stored Charge vs. di
f
/dt,
(per Leg)
Fig. 8 - Typical di
(rec)M
/dt vs. di
f
/dt,
(per Leg)
Fig. 5 - Typical Reverse Recovery vs. di
f
/dt,
(per Leg)
Fig. 6 - Typical Recovery Current vs. di
f
/dt,
(per Leg)
40
80
120
160
200
240
100
1000
f
di /dt - (A/s)
t
- (ns)
rr
I = 200A
I = 80A
I = 40A
F
F
F
V = 200V
T = 125C
T = 25C
R
J
J
1
10
100
100
1000
f
di /dt - (A/s)
I
- (A)
I
RRM
I = 200A
I = 80A
I = 40A
F
F
F
V = 200V
T = 125C
T = 25C
R
J
J
100
1000
10000
100
1000
f
di /dt - (A/s)
di(re
c)M
/
dt - (A/
s)
I = 200A
I = 80A
I = 40A
V = 200V
T = 125C
T = 25C
R
J
J
F
F
F
0
1000
2000
3000
4000
5000
100
1000
f
di /dt - (A/s)
RR
Q
- (nC)
I = 40A
I = 80A
I = 200A
V = 200V
T = 125C
T = 25C
R
J
J
F
F
F
HFA120MD40C
5
PD-2.466 rev. B 12/98
4. Q
rr
- Area under curve defined by t
rr
and I
RRM
t
rr
X I
RRM
Q
rr
=
2
5. di
(rec)M
/dt - Peak rate of change of
current during t
b
portion of t
rr
V
(AVAL)
R(RATED)
I
L(PK)
V
DECAY
TIME
Fig. 11 - Avalanche Test Circuit and Waveforms
Fig. 10 - Reverse Recovery Waveform and
Definitions
Fig. 9 - Reverse Recovery Parameter Test
Circuit
t
a
t
b
t
rr
Q
rr
I
F
I
RRM
I
RRM
0.5
di(rec)M/dt
0.75 I
RRM
5
4
3
2
0
1
di /dt
f
1. di
f
/dt - Rate of change of current
through zero crossing
2. I
RRM
- Peak reverse recovery current
3. trr - Reverse recovery time measured
from zero crossing point of negative
going I
F
to point where a line passing
through 0.75 I
RRM
and 0.50 I
RRM
extrapolated to zero current
REVERSE RECOVERY CIRCUIT
IRFP250
D.U.T.
L = 70H
V = 200V
R
0.01
G
D
S
dif/dt
ADJUST
CURRENT
MONITOR
HIGH-SPEED
SWITCH
DUT
Rg = 25 ohm
+
FREE-WHEEL
DIODE
Vd = 50V
L = 100H
http://www.irf.com Fax-On-Demand: +44 1883 733420 Data and specifications subject to change without notice.
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