MURB820/MURB820-1
Vishay High Power Products
Ultrafast Rectifier,
8 A FRED Pt
TM
FEATURES
MURB820
MURB820-1
• Ultrafast recovery time
• Low forward voltage drop
• Low leakage current
• 175 °C operating junction temperature
• Designed and qualified for industrial level
Base
cathode
2
2
DESCRIPTION/APPLICATIONS
MUR.. series are the state of the art ultrafast recovery
rectifiers specifically designed with optimized performance of
forward voltage drop and ultrafast recovery time.
The planar structure and the platinum doped life time control,
guarantee the best overall performance, ruggedness and
reliability characteristics.
These devices are intended for use in the output rectification
stage of SMPS, UPS, dc-to-dc converters as well as
freewheeling diode in low voltage inverters and chopper
motor drives.
Their extremely optimized stored charge and low recovery
current minimize the switching losses and reduce over
dissipation in the switching element and snubbers.
1
N/C
3
Anode
1
N/C
3
Anode
D
2
PAK
TO-262
PRODUCT SUMMARY
t
rr
I
F(AV)
V
R
25 ns
8A
200 V
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Peak repetitive reverse voltage
Average rectified forward current
Non-repetitive peak surge current
Peak repetitive forward current
Operating junction and storage temperatures
SYMBOL
V
RRM
I
F(AV)
I
FSM
I
FM
T
J
, T
Stg
Rated V
R
, square wave, 20 kHz, T
C
= 150 °C
Total device, rated V
R
, T
C
= 150 °C
TEST CONDITIONS
MAX.
200
8
100
16
- 65 to 175
°C
A
UNITS
V
ELECTRICAL SPECIFICATIONS
(T
J
= 25 °C unless otherwise specified)
PARAMETER
Breakdown voltage,
blocking voltage
Forward voltage
SYMBOL
V
BR
,
V
R
V
F
I
R
C
T
L
S
I
R
= 100 µA
I
F
= 8 A
I
F
= 8 A, T
J
= 150 °C
V
R
= V
R
rated
T
J
= 150 °C, V
R
= V
R
rated
V
R
= 200 V
Measured lead to lead 5 mm from package body
TEST CONDITIONS
MIN.
200
-
-
-
-
-
-
TYP.
-
-
-
-
-
25
8.0
MAX.
-
0.975
0.895
5
250
-
-
µA
pF
nH
V
UNITS
Reverse leakage current
Junction capacitance
Series inductance
Document Number: 93123
Revision: 24-Jun-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com
1
MURB820/MURB820-1
Vishay High Power Products
Ultrafast Rectifier,
8 A FRED Pt
TM
DYNAMIC RECOVERY CHARACTERISTICS
(T
J
= 25 °C unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
I
F
= 1.0 A, dI
F
/dt = 50 A/µs, V
R
= 30 V
Reverse recovery time
t
rr
I
F
= 0.5 A, I
R
= 1.0 A, I
REC
= 0.25 A
T
J
= 25 °C
T
J
= 125 °C
Peak recovery current
I
RRM
Q
rr
T
J
= 25 °C
T
J
= 125 °C
T
J
= 25 °C
T
J
= 125 °C
I
F
= 8 A
dI
F
/dt = 200 A/µs
V
R
= 160 V
MIN.
-
-
-
-
-
-
-
-
TYP.
-
-
20
34
1.7
4.2
23
75
MAX.
35
25
-
-
-
-
-
-
A
ns
UNITS
Reverse recovery charge
nC
THERMAL - MECHANICAL SPECIFICATIONS
PARAMETER
Maximum junction and
storage temperature range
Thermal resistance,
junction to case
Thermal resistance,
junction to ambient
Thermal resistance,
case to heatsink
Weight
Mounting torque
Marking device
Case style D
2
PAK
Case style TO-262
SYMBOL
T
J
, T
Stg
R
thJC
R
thJA
R
thCS
Mounting surface, flat, smooth and
greased
TEST CONDITIONS
MIN.
- 65
-
-
-
-
-
6.0
(5.0)
TYP.
-
-
-
0.5
2.0
0.07
-
MAX.
175
3.0
50
-
-
-
12
(10)
MURB820
MURB820-1
g
oz.
kgf · cm
(lbf · in)
°C/W
UNITS
°C
www.vishay.com
2
For technical questions, contact: diodes-tech@vishay.com
Document Number: 93123
Revision: 24-Jun-08
MURB820/MURB820-1
Ultrafast Rectifier,
8 A FRED Pt
TM
I
F
- Instantaneous Forward Current (A)
100
100
Vishay High Power Products
I
R
- Reverse Current (µA)
T
J
= 175 °C
10
T
J
= 150 °C
T
J
= 125 °C
T
J
= 100 °C
0.1
10
1
1
T
J
= 175 °C
T
J
= 150 °C
T
J
= 25 °C
0.01
T
J
= 25 °C
0.001
0
50
100
150
200
250
0.1
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
V
F
- Forward Voltage Drop (V)
Fig. 1 - Typical Forward Voltage Drop Characteristics
V
R
- Reverse Voltage (V)
Fig. 2 - Typical Values of Reverse Current vs.
Reverse Voltage
1000
C
T
- Junction Capacitance (pF)
100
T
J
= 25 °C
10
1
10
100
1000
V
R
- Reverse Voltage (V)
Fig. 3 - Typical Junction Capacitance vs. Reverse Voltage
Z
thJC
- Thermal Impedance (°C/W)
10
1
P
DM
0.1
Single pulse
(thermal resistance)
0.01
0.00001
D = 0.50
D = 0.20
D = 0.10
D = 0.05
D = 0.02
D = 0.01
t
1
t
2
Notes:
1. Duty factor D = t
1
/t
2
.
2. Peak T
J
= P
DM
x Z
thJC
+ T
C
0.01
0.1
.
1
0.0001
0.001
t
1
- Rectangular Pulse Duration (s)
Fig. 4 - Maximum Thermal Impedance Z
thJC
Characteristics
Document Number: 93123
Revision: 24-Jun-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com
3
MURB820/MURB820-1
Vishay High Power Products
180
Ultrafast Rectifier,
8 A FRED Pt
TM
50
V
R
= 160 V
T
J
= 125 °C
T
J
= 25 °C
I
F
= 16 A
I
F
= 8 A
I
F
= 4 A
Allowable Case Temperature (°C)
170
40
t
rr
(ns)
160
Square wave (D = 0.50)
Rated V
R
applied
DC
30
150
20
140
See note (1)
130
0
3
6
9
12
10
100
1000
I
F(AV)
- Average Forward Current (A)
Fig. 5 - Maximum Allowable Case Temperature vs.
Average Forward Current
dI
F
/dt (A/µs)
Fig. 7 - Typical Reverse Recovery Time vs. dI
F
/dt
10
200
V
R
= 160 V
T
J
= 125 °C
T
J
= 25 °C
I
F
= 16 A
I
F
= 8 A
I
F
= 4 A
Average Power Loss (W)
8
RMS limit
D = 0.01
D = 0.02
D = 0.05
D = 0.10
D = 0.20
D = 0.50
160
Q
rr
(nC)
6
120
4
80
2
DC
0
0
3
6
40
9
12
0
100
1000
I
F(AV)
- Average Forward Current (A)
Fig. 6 - Forward Power Loss Characteristics
Note
(1)
Formula used: T = T - (Pd + Pd
C
J
REV
) x R
thJC
;
Pd = Forward power loss = I
F(AV)
x V
FM
at (I
F(AV)
/D) (see fig. 6);
Pd
REV
= Inverse power loss = V
R1
x I
R
(1 - D); I
R
at V
R1
= Rated V
R
dI
F
/dt (A/µs)
Fig. 8 - Typical Stored Charge vs. dI
F
/dt
www.vishay.com
4
For technical questions, contact: diodes-tech@vishay.com
Document Number: 93123
Revision: 24-Jun-08
MURB820/MURB820-1
Ultrafast Rectifier,
8 A FRED Pt
TM
V
R
= 200 V
Vishay High Power Products
0.01
Ω
L = 70 µH
D.U.T.
dI
F
/dt
adjust
D
G
IRFP250
S
Fig. 9 - Reverse Recovery Parameter Test Circuit
(3)
I
F
0
t
rr
t
a
t
b
Q
rr
(2)
(4)
I
RRM
0.5 I
RRM
dI
(rec)M
/dt
(5)
0.75 I
RRM
(1)
dI
F
/dt
(1) dI
F
/dt - rate of change of current
through zero crossing
(2) I
RRM
- peak reverse recovery current
(3) t
rr
- 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.
(4) Q
rr
- area under curve defined by t
rr
and I
RRM
Q
rr
=
t
rr
x I
RRM
2
(5) dI
(rec)M
/dt - peak rate of change of
current during t
b
portion of t
rr
Fig. 10 - Reverse Recovery Waveform and Definitions
Document Number: 93123
Revision: 24-Jun-08
For technical questions, contact: diodes-tech@vishay.com
www.vishay.com
5
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