Philips Semiconductors
Product specification
Dual rectifier diodes
ultrafast
FEATURES
• Low forward volt drop
• Fast switching
• Soft recovery characteristic
• High thermal cycling performance
• Low thermal resistance
BYT28 series
SYMBOL
QUICK REFERENCE DATA
V
R
= 300 V/ 400 V/ 500 V
a1
1
k 2
a2
3
V
F
≤
1.05 V
I
O(AV)
= 10 A
t
rr
≤
60 ns
SOT78 (TO220AB)
GENERAL DESCRIPTION
Dual, common cathode, ultra-fast,
epitaxial rectifier diodes intended
for use as output rectifiers in high
frequency switched mode power
supplies.
The BYT28 series is supplied in the
conventional
leaded
SOT78
(TO220AB) package.
PINNING
PIN
1
2
tab
DESCRIPTION
cathode
anode
cathode
tab
1 23
LIMITING VALUES
Limiting values in accordance with the Absolute Maximum System (IEC 134).
SYMBOL
V
RRM
V
R
I
O(AV)
I
FSM
PARAMETER
CONDITIONS
BYT28
Repetitive peak reverse voltage
Continuous reverse voltage
T
mb
≤
147˚C
Average rectified output current
(both diodes conducting)
1
Non-repetitive peak forward
current per diode.
Storage temperature
Operating junction temperature
square wave;
δ
= 0.5;
T
mb
≤
115 ˚C
t = 10 ms
t = 8.3 ms
sinusoidal; with reapplied
V
RRM(max)
-
-
-
-
-
-40
-
MIN.
-300
300
300
MAX.
-400
400
400
10
50
55
150
150
-500
500
500
UNIT
V
V
A
A
A
˚C
˚C
T
stg
T
j
THERMAL RESISTANCES
SYMBOL
R
th j-hs
R
th j-a
PARAMETER
Thermal resistance junction to
heatsink
Thermal resistance junction to
ambient
CONDITIONS
per diode
both diodes conducting
in free air.
MIN.
-
-
-
TYP.
-
-
60
MAX.
4.5
3.0
-
UNIT
K/W
K/W
K/W
1
Neglecting switching and reverse current losses.
October 1998
1
Rev 1.400
Philips Semiconductors
Product specification
Dual rectifier diodes
ultrafast
ELECTRICAL CHARACTERISTICS
characteristics are per diode at T
j
= 25 ˚C unless otherwise stated
SYMBOL
V
F
I
R
Q
s
t
rr
I
rrm
V
fr
PARAMETER
Forward voltage
Reverse current
Reverse recovery charge
Reverse recovery time
Peak reverse recovery current
Forward recovery voltage
CONDITIONS
I
F
= 5 A; T
j
= 150˚C
I
F
= 10 A
V
R
= V
RRM
V
R
= V
RRM
; T
j
= 100 ˚C
I
F
= 2 A to V
R
≥
30 V;
dI
F
/dt = 20 A/µs
I
F
= 1 A to V
R
≥
30 V;
dI
F
/dt = 100 A/µs
I
F
= 5 A to V
R
≥
30 V;
dI
F
/dt = 50 A/µs; T
j
= 100˚C
I
F
= 1 A; dI
F
/dt = 10 A/µs
MIN.
-
-
-
-
-
-
-
-
BYT28 series
TYP.
0.95
1.30
2.0
10
50
50
2.0
2.5
MAX.
1.05
1.40
10
200
60
60
3.0
-
UNIT
V
V
µA
µA
nC
ns
A
V
I
dI
F
dt
F
9
8
7
PF / W
Vo = 0.945 V
Rs = 0.021 Ohms
BYT28
Tmb(max) / C
D = 1.0
109.5
114
118.5
t
rr
time
6
5
4
0.1
3
0.2
0.5
123
127.5
132
Q
I
R
I
s
10%
100%
I
t
p
D=
2
1
T
t
p
T
t
136.5
141
145.5
150
8
rrm
0
0
1
2
3
4
IF(AV) / A
5
6
7
Fig.1. Definition of t
rr
, Q
s
and I
rrm
Fig.3. Maximum forward dissipation P
F
= f(I
F(AV)
) per
diode; square wave where I
F(AV)
=I
F(RMS)
x
√
D.
PF / W
Vo = 0.945 V
Rs = 0.021 Ohms
I
F
6
5
BYT28
Tmb(max) / C
a = 1.57
1.9
2.2
123
127.5
132
4
2.8
time
VF
V
VF
time
fr
3
2
1
0
4
136.5
141
145.5
150
5
0
1
2
IF(AV) / A
3
4
Fig.2. Definition of V
fr
Fig.4. Maximum forward dissipation P
F
= f(I
F(AV)
) per
diode; sinusoidal current waveform where a = form
factor = I
F(RMS)
/ I
F(AV)
.
October 1998
2
Rev 1.400
Philips Semiconductors
Product specification
Dual rectifier diodes
ultrafast
BYT28 series
1000
trr / ns
1000
Qs / nC
IF=5 A
100
1A
100
5A
IF = 2 A
10
Tj = 25 C
Tj = 100 C
1
1
10
dIF/dt (A/us)
100
10
1
1.0
10
-dIF/dt (A/us)
100
Fig.5. Maximum t
rr
at T
j
= 25˚C and 100˚C; per diode
Fig.8. Maximum Q
s
at T
j
= 25˚C; per diode.
10
Irrm / A
10
Transient thermal impedance, Zth j-mb (K/W)
IF= 5 A
1
1
IF=1A
0.1
0.1
0.01
P
D
t
p
D=
t
p
T
t
Tj = 25 C
Tj = 100 C
0.01
1
10
-dIF/dt (A/us)
100
0.001
1us
10us
T
100us 1ms
10ms 100ms
1s
pulse width, tp (s)
BYQ28E
10s
Fig.6. Maximum I
rrm
at T
j
= 25˚C and 100˚C; per
diode.
Fig.9. Transient thermal impedance per diode
Z
th
= f(t
p
)
15
IF / A
Tj=150C
Tj=25C
BYQ28
10
5
typ
max
0
0
0.5
VF / V
1
1.5
Fig.7. Typical and maximum forward characteristic
I
F
= f(V
F
); parameter T
j
October 1998
3
Rev 1.400
Philips Semiconductors
Product specification
Dual rectifier diodes
ultrafast
MECHANICAL DATA
Dimensions in mm
Net Mass: 2 g
BYT28 series
4,5
max
10,3
max
1,3
3,7
2,8
5,9
min
15,8
max
3,0 max
not tinned
3,0
13,5
min
1,3
max
1 2 3
(2x)
2,54 2,54
0,9 max (3x)
0,6
2,4
Fig.10. SOT78 (TO220AB); pin 2 connected to mounting base.
Notes
1. Refer to mounting instructions for SOT78 (TO220) envelopes.
2. Epoxy meets UL94 V0 at 1/8".
October 1998
4
Rev 1.400
Philips Semiconductors
Product specification
Dual rectifier diodes
ultrafast
DEFINITIONS
Data sheet status
Objective specification
Product specification
Limiting values
BYT28 series
This data sheet contains target or goal specifications for product development.
This data sheet contains final product specifications.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Limiting values are given in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and
operation of the device at these or at any other conditions above those given in the Characteristics sections of
this specification is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
©
Philips Electronics N.V. 1998
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the
copyright owner.
The information presented in this document does not form part of any quotation or contract, it is believed to be
accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any
consequence of its use. Publication thereof does not convey nor imply any license under patent or other
industrial or intellectual property rights.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices or systems where malfunction of these
products can be reasonably expected to result in personal injury. Philips customers using or selling these products
for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting
from such improper use or sale.
October 1998
5
Rev 1.400
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