08/29/02
• Reduced RFI and EMI
• Reduced Snubbing
• Extensive Characterization of Recovery Parameters
• Hermetic
• Ceramic Eyelets
Features
Description
These Ultrafast, soft recovery 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
FRED
VR = 1200V
IF(AV) = 15A
Qrr = 370ns
Note: QD.C. = 50% rect. wave
R1/2 sine wave, 60 Hz , P.W. = 8.33 ms
HFA35HB120C
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Parameter Max. Units
VRCathode to Anode Voltage ( Per Leg ) 1200 V
IF(AV) Continuous Forward Current, Q TC =100 °C 15
IFSM Single Pulse Forward Current, R TC = 25°C ( Per Leg ) 80
PD @ TC = 25°C Maximum Power Dissipation 63 W
TJ, TSTG Operating Junction and Storage Temperature Range -55 to +150 °C
A
Absolute Maximum Ratings
CASE STYLE
TO-254AA
(ISOLATED BASE)
ANODE COMMON ANODE
CATHODE
PD - 20371D
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HFA35HB120C
Thermal - Mechanical Characteristics
Parameter Typ. Max. Units
RthJC Junction-to-Case, Single Leg Conducting — 2.0
Wt Weight 9.3 — g
°C/W
Dynamic Recovery Characteristics (Per Leg) @ TJ = 25°C (unless otherwise specified)
A/µs
nC
A
Parameter Min. Typ. Max. Uni ts Test Conditions
trr1 Reverse Recovery Time — 58 100 ns TJ = 25°C See Fig.
trr2 — 110 165 TJ = 125°C 5 IF = 7A
IRRM1 Peak Recovery Current — 5.4 8.1 TJ = 25°C See Fig.
IRRM2 — 7.2 10.8 TJ = 125°C 6 VR = 200V
Qrr1 Reverse Recovery Charge — 185 370 TJ = 25°C See Fig.
Qrr2 — 395 590 TJ = 125°C 7 dif/dt = 200A/µs
di(rec)M/dt1 Peak Rate of Fall of Recovery Current — 255 380 TJ = 25°C See Fig.
di(rec)M/dt2 During tb— 160 240 TJ = 125°C 8
Parameter Min. Typ. Max. Units Test Conditions
VBR Cathode Anode Breakdown Voltage 1200 — — V IR = 250µA
VFM Max Forward Voltage — — 3.3 IF = 7.0A
See Fig. 1 — — 4. 4 V IF = 15A
— — 2.8 IF = 7.0A, TJ = 125°C
IRM Max Reverse Leakage Current — — 10 µA VR = VR Rated
See Fig. 2 — — 1. 0 mA VR = VR Rated, TJ = 125°C
CTJunction Capacitance, See Fig. 3 — 10 15 pF VR = 200V
LSSeries Inductance — 8.7 — nH Measured from anode lead to cathode
lead, 6mm ( 0.025 in) from package
Electrical Characteristics (Per Leg) @ TJ = 25°C (unless otherwise specified)
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HFA35HB120C
Fig. 4 - Maximum Thermal Impedance Zthjc 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 )
0.001
0.01
0.1
1
10
100
1000
0 300 600 900 1200
R
R
Reverse Volta
g
e - V (V)
R e ve rse C u rren t - I (µA )
T = 125°C
J
T = 2 5 °C
J
T = 150°C
J
1
10
100
1 10 100 1000
Reverse Volta
g
e - V
(
V
)
R
T
Junction C apacitance - C (pF)
A
T = 25°C
J
0.01
0.1
1
10
0.00001 0.0001 0.001 0.01 0.1 1
Notes:
1. Duty factor D = t / t
2. Peak T =P x Z + T
1 2
JDM thJC C
P
t
t
DM
1
2
t , Rectangular Pulse Duration (sec)
Thermal Response (Z )
1
thJC
0.01
0.02
0.05
0.10
0.20
D = 0.50
SINGLE PULSE
(THERMAL RESPONSE)
1
10
100
1.0 3.0 5.0 7.0
FM
F
In s ta n tan e o us F o r w a rd Cu rre n t - I (A)
Forward Volta
g
e Dro
p
- V
(
V
)
T = 150°C
T = 125°C
T = 25°C
J
J
J
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HFA35HB120C
Fig. 7 - Typical Stored Charge vs. dif/dt Fig. 8 - Typical di(rec)M/dt vs. dif/dt
Fig. 5 - Typical Reverse Recovery vs. dif/dt Fig. 6 - Typical Recovery Current vs. dif/dt
0
30
60
90
120
150
100 1000
trr - (ns)
f
d i /d t -
(
A/
µ
s
)
I = 1 4 A
I = 7 A
I = 3.5A
F
F
F
V = 200V
T = 125°C
T = 25°C
R
J
J
1
10
100
100 1000
f
d i /d t -
(
A/
µ
s
)
RRM
I - (A)
I = 1 4 A
I = 7 A
I = 3.5A
F
F
F
V = 200V
T = 125°C
T = 2 5°C
R
J
J
10
100
1000
100 1000
f
d i /d t -
(
A/
µ
s
)
RR
Q - (n C )
I = 1 4 A
I = 7 A
I = 3.5A
F
F
F
V = 200V
T = 125°C
T = 2 5°C
R
J
J
10
100
1000
10000
100 1000
f
d i /d t -
(
A/
µ
s
)
d i(re c )M /dt - (A /µ s)
V = 200V
T = 12 5°C
T = 25°C
R
J
J
I = 7 A
F
I = 1 4 A
F
I = 3.5A
F
Qrr- (nC)
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HFA35HB120C
4. Qrr - Area under curve defined by trr
and IRRM
trr X IRRM
Qrr =
2
5. di(rec)M/dt - Peak rate of change of
current during tb portion of trr
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
d i /d t
f
1. dif/dt - Rate of change of current
through zero crossing
2. IRRM - Peak reverse recovery current
3. trr - Reverse recovery time measured
from zero crossing point of negative
going IF to point where a line passing
through 0.75 IRRM and 0.50 IRRM
extrapolated to zero current
REVERSE RECOVERY CIRCUIT
IRFP250
D.U.T.
L = 70µH
V = 200V
R
0.01
Ω
G
D
S
dif/dt
ADJUST
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105
TAC Fax: (310) 252-7903
Visit us at www.irf.com for sales contact information.
Data and specifications subject to change without notice. 08/02
Case Outline and Dimensions — TO-254AA
6.60 [.260]
6.32 [.249] 1.27 [.050]
1.02 [.040]
0.12 [.005]
13.84 [.545]
13.59 [.535]
13.84 [.545]
13.59 [.535]
3.81 [.150]
2X
17.40 [.685]
16.89 [.665]
A
1 .14 [.0 45]
0 .89 [.0 35]
0.36 [.014] B A
3X
B
20.32 [.800]
20.07 [.790]
3.78 [.149]
3.53 [.139]
123
PIN ASSIGNMEN TS
17.40 [.685]
16.89 [.665]
3.81 [.150]
0.84 [.033]
MAX.
C
1 = DRAIN
PIN ASSIGNMENTS
1 = ANODE 1
2 = COMMON CATHODE
3 = ANODE 2
NOTES:
1. DIMENSIONING & TOLERANCING PER ASME Y14.5M-1994
2. ALL DIMENSIONS ARE SHO WN IN MILLIMETERS [INCHES]
3. CONTRO LLING DIM ENSION: INC H.
4. CONFORMS TO JEDEC OUTLINE TO-254AA.