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PD -2.473 rev. B 01/99
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
HFA80NC40C
D-61-8
V
R
= 400V
V
F
(typ.)
= 1V
I
F(AV)
= 80A
Q
rr
(typ.) = 200nC
I
RRM
(typ.)
= 6A
t
rr
(typ.)
= 30ns
di
(rec)M
/dt (typ.)
= 190A/s
Absolute Maximum Ratings (per Leg)
Note:
Limited by junction temperature
L = 100H, duty cycle limited by max T
J
125C
W
C/W
K/W
Thermal - Mechanical Characteristics
35 (4.0)
50 (5.7)
Parameter
Max.
Units
V
R
Cathode-to-Anode Voltage
400
V
I
F
@ T
C
= 25C
Continuous Forward Current
85
I
F
@ T
C
= 100C
Continuous Forward Current
42
A
I
FSM
Single Pulse Forward Current
300
E
AS
Non-Repetitive Avalanche Energy
1.4
mJ
P
D
@ T
C
= 25C
Maximum Power Dissipation
150
P
D
@ T
C
= 100C
Maximum Power Dissipation
59
T
J
Operating Junction and
T
STG
Storage Temperature Range
Parameter
Min.
Typ.
Max.
Units
R
thJC
Junction-to-Case, Single Leg Conducting
0.85
Junction-to-Case, Both Legs Conducting
0.42
R
thCS
Case-to-Sink, Flat , Greased Surface
0.30
Wt
Weight
7.8 (0.28)
g (oz)
Mounting Torque
lbfin
(Nm)
-55 to +150
C
1
HFA80NC40C
PD-2.473 rev. B 01/99
2
Parameter
Min. Typ. Max. Units
Test Conditions
V
BR
Cathode Anode Breakdown Voltage
400
V
I
R
= 100A
V
FM
Max Forward Voltage
1.1
1.3
I
F
= 40A
1.3
1.5
V
I
F
= 80A
1.0
1.2
I
F
= 40A, T
J
= 125C
I
RM
Max Reverse Leakage Current
0.50
3.0
A
V
R
= V
R
Rated
0.75
4.0
mA
T
J
= 125C, V
R
= 320V
C
T
Junction Capacitance
90
125
pF
V
R
= 200V
L
S
Series Inductance
5.5
nH
Lead to lead 5mm from package body
Electrical Characteristics (per Leg) @ T
J
= 25C (unless otherwise specified)
Dynamic Recovery Characteristics (per Leg) @ TJ = 25C (unless otherwise specified)
A/s
nC
A
Parameter
Min. Typ. Max. Units Test Conditions
t
rr
Reverse Recovery Time
30
I
F
= 1.0A, di
f
/dt = 200A/s, V
R
= 30V
t
rr1
67
100
ns
T
J
= 25C
t
rr2
110
170
T
J
= 125C
I
F
= 40A
I
RRM1
Peak Recovery Current
6.0
11
T
J
= 25C
I
RRM2
9.0
16
T
J
= 125C
V
R
= 200V
Q
rr1
Reverse Recovery Charge
200
540
T
J
= 25C
Q
rr2
500
1300
T
J
= 125C
di
f
/dt = 200A/s
di
(rec)M
/dt1
Peak Rate of Fall of Recovery Current
240
T
J
= 25C
di
(rec)M
/dt2
During t
b
190
T
J
= 125C
See Fig. 1
See Fig. 2
See Fig. 3
See Fig.
5
See Fig.
6
See Fig.
7
See Fig.
8
Outline D 61- 8
Dimensions in millimeters and (inches)
HFA80NC40C
PD-2.473 rev. B 01/99
3
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)
1
10
1 00
10 00
0.4
0.8
1.2
1.6
2.0
F M
F
I
n
s
t
ant
a
n
e
o
u
s
F
o
r
w
ar
d
Cu
r
r
ent
-
I
(
A
)
F o rw a rd V o lta g e D ro p - V (V )
T = 1 5 0 C
T = 1 2 5 C
T = 2 5 C
J
J
J
1 0
1 0 0
1 0 0 0
1
1 0
1 0 0
1 0 0 0
T = 2 5 C
J
R e v e rs e V o lta g e - V (V )
R
T
J
u
nc
t
i
on
C
a
pa
c
i
t
a
n
c
e
-
C
(
p
F
)
A
0.01
0.1
1
0.0001
0.001
0.01
0.1
1
10
100
1
th
J
C
t , R e cta n g u la r P u lse D u ra tio n (S e co n d s )
D = 0.50
D = 0.33
D = 0.25
D = 0.1 7
D = 0.08
S ingle P ulse
(The rm a l R es is ta nc e)
T
her
m
a
l
I
m
pedan
c
e
-
Z
(
K
/
W
)
2
t
1
t
P
D M
N o te s:
1 . D u ty fa c to r D = t / t
2 . P e a k T = P x Z + T
J
D M
th J C
C
2
1
0.1
1
1 0
10 0
1 0 0 0
1 0 0 0 0
0
1 00
20 0
30 0
400
R
R
R e v e rse V o lta g e - V (V )
T = 1 5 0 C
R
e
v
e
rs
e
C
u
rre
n
t
- I
(
A
)
T = 1 2 5 C
T = 2 5 C
J
J
J
HFA80NC40C
PD-2.473 rev. B 01/99
4
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)
4 0
6 0
8 0
100
120
140
160
10 0
1000
f
d i /d t - (A / s )
t
-
(
n
s
)
rr
I = 1 0 0 A
I = 4 0 A
I = 2 0 A
V = 2 0 0 V
T = 1 2 5 C
T = 2 5 C
R
J
J
F
F
F
0
500
1000
1500
2000
2500
10 0
10 00
f
d i /d t - (A / s )
RR
Q
-
(
n
C
)
I = 1 0 0 A
I = 4 0 A
I = 2 0 A
V = 2 0 0 V
T = 1 2 5 C
T = 2 5 C
R
J
J
F
F
F
1 00
10 00
1 0 0 0 0
1 0 0
1 00 0
f
d i /d t - (A / s )
d
i
(r
e
c
)M
/
d
t
-
(A
/
s
)
I = 1 0 0 A
I = 2 0 A
I = 4 0 A
V = 2 0 0 V
T = 1 2 5 C
T = 2 5 C
R
J
J
F
F
F
1
10
1 0 0
10 0
10 0 0
f
d i /d t - (A / s)
I
-
(
A
)
I
RRM
I = 1 0 0 A
I = 4 0 A
I = 2 0 A
V = 2 0 0 V
T = 1 2 5 C
T = 2 5 C
R
J
J
F
F
F
HFA80NC40C
PD-2.473 rev. B 01/99
5
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
(A V A L)
R (R A T E D )
I
L(P K )
V
D E C A Y
T IM E
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
R R M
I
R R M
0 .5
d i(re c)M /d t
0.75 I
R R M
5
4
3
2
0
1
d i /d t
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
R E V E R S E R E C O V E R Y C IR C U IT
IR F P 2 50
D .U .T .
L = 7 0 H
V = 2 00 V
R
0.01
G
D
S
d if/d t
A D JU S T
C U R R E N T
M O N IT O R
H IG H -S P E E D
S W IT C H
D U T
R g = 2 5 o h m
+
F R E E -W H E E L
D IO D E
V d = 5 0 V
L = 1 0 0 H
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