Page 1
Philips Semiconductors Product specification
Dual rectifier diodes BYT28 series
ultrafast
FEATURES SYMBOL QUICK REFERENCE DATA
• Low forward volt drop V
• Fast switching
• Soft recovery characteristic V
• High thermal cycling performance
a1
13
a2
• Low thermal resistance I
k
2
= 300 V/ 400 V/ 500 V
R
≤ 1.05 V
F
= 10 A
O(AV)
trr ≤ 60 ns
GENERAL DESCRIPTION PINNING SOT78 (TO220AB)
Dual, common cathode, ultra-fast, PIN DESCRIPTION
epitaxial rectifier diodes intended
for use as output rectifiers in high 1 cathode
frequency switched mode power
supplies. 2 anode
TheBYT28series is supplied in the tab cathode
conventional leaded SOT78
(TO220AB) package.
tab
123
LIMITING VALUES
Limiting values in accordance with the Absolute Maximum System (IEC 134).
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
V
I
O(AV)
I
FSM
T
T
RRM
R
stg
j
Repetitive peak reverse voltage - 300 400 500 V
Continuous reverse voltage Tmb ≤ 147˚C - 300 400 500 V
Average rectified output current square wave; δ = 0.5; - 10 A
(both diodes conducting)
1
Tmb ≤ 115 ˚C
Non-repetitive peak forward t = 10 ms - 50 A
current per diode. t = 8.3 ms - 55 A
sinusoidal; with reapplied
V
RRM(max)
Storage temperature -40 150 ˚C
Operating junction temperature - 150 ˚C
BYT28 -300 -400 -500
THERMAL RESISTANCES
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
R
th j-hs
R
th j-a
1 Neglecting switching and reverse current losses.
October 1998 1 Rev 1.400
Thermal resistance junction to per diode - - 4.5 K/W
heatsink both diodes conducting - - 3.0 K/W
Thermal resistance junction to in free air. - 60 - K/W
ambient
Page 2
Philips Semiconductors Product specification
Dual rectifier diodes BYT28 series
ultrafast
ELECTRICAL CHARACTERISTICS
characteristics are per diode at Tj = 25 ˚C unless otherwise stated
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
F
I
R
Q
s
t
rr
I
rrm
V
fr
Forward voltage IF = 5 A; Tj = 150˚C - 0.95 1.05 V
IF = 10 A - 1.30 1.40 V
Reverse current VR = V
Reverse recovery charge IF = 2 A to VR ≥ 30 V; - 50 60 nC
VR = V
RRM
; Tj = 100 ˚C - 10 200 µA
RRM
- 2.0 10 µA
dIF/dt = 20 A/µs
Reverse recovery time IF = 1 A to VR ≥ 30 V; - 50 60 ns
dIF/dt = 100 A/µs
Peak reverse recovery current IF = 5 A to VR ≥ 30 V; - 2.0 3.0 A
dIF/dt = 50 A/µs; Tj = 100˚C
Forward recovery voltage IF = 1 A; dIF/dt = 10 A/µs - 2.5 - V
I
F
dI
F
dt
t
rr
time
Q
s
I
R
I
rrm
10%
Fig.1. Definition of trr, Qs and I
100%
rrm
PF / W
9
Vo = 0.945 V
Rs = 0.021 Ohms
8
7
6
5
4
3
2
1
0
012345678
0.1
Fig.3. Maximum forward dissipation PF = f(I
BYT28
0.2
I
IF(AV) / A
diode; square wave where I
I
F
time
V
F
PF / W
6
Vo = 0.945 V
Rs = 0.021 Ohms
5
4
3
2
BYT28
2.2
2.8
4
0.5
F(AV)
Tmb(max) / C
t
p
T
=I
F(RMS)
Tmb(max) / C
1.9
D = 1.0
D =
a = 1.57
t
p
T
t
F(AV)
x √D.
123
127.5
132
136.5
141
109.5
114
118.5
123
127.5
132
136.5
141
145.5
150
) per
Fig.2. Definition of V
V
fr
V
F
time
fr
1
0
012345
IF(AV) / A
Fig.4. Maximum forward dissipation PF = f(I
F(AV)
145.5
150
) per
diode; sinusoidal current waveform where a = form
factor = I
F(RMS)
/ I
F(AV)
.
October 1998 2 Rev 1.400
Page 3
Philips Semiconductors Product specification
Dual rectifier diodes BYT28 series
ultrafast
trr / ns
1000
100
10
Tj = 25 C
Tj = 100 C
1
110
dIF/dt (A/us)
IF=5 A
1A
100
Fig.5. Maximum trr at Tj = 25˚C and 100˚C; per diode
Irrm / A
10
1
0.1
0.01
1
Fig.6. Maximum I
rrm
IF= 5 A
IF=1A
Tj = 25 C
Tj = 100 C
10 100
-dIF/dt (A/us)
at Tj = 25˚C and 100˚C; per
diode.
Qs / nC
1000
100
10
1
1.0 10 100
-dIF/dt (A/us)
5 A
IF = 2 A
Fig.8. Maximum Qs at Tj = 25˚C; per diode.
Transient thermal impedance, Zth j-mb (K/W)
10
1
0.1
p
D =
BYQ28E
t
T
t
p
t
0.01
0.001
1us 10us 100us 1ms 10ms 100ms 1s 10s
P
D
pulse width, tp (s)
T
Fig.9. Transient thermal impedance per diode
Zth = f(tp)
IF / A
15
Tj=150C
Tj=25C
10
5
0
01
0.5
typ
VF / V
BYQ28
max
1.5
Fig.7. Typical and maximum forward characteristic
IF = f(VF); parameter T
j
October 1998 3 Rev 1.400
Page 4
Philips Semiconductors Product specification
Dual rectifier diodes BYT28 series
ultrafast
MECHANICAL DATA
Dimensions in mm
Net Mass: 2 g
10,3
max
1,3
3,7
4,5
max
3,0 max
not tinned
1,3
max
(2x)
123
2,54 2,54
2,8
3,0
13,5
min
0,9 max (3x)
5,9
min
15,8
max
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
Page 5
Philips Semiconductors Product specification
Dual rectifier diodes BYT28 series
ultrafast
DEFINITIONS
Data sheet status
Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.
Limiting values
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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