Vishay Telefunken BYW178 Datasheet

Very Fast Silicon Mesa Rectifier

Features

D

Glass passivated junction

D

Hermetically sealed package

D

Low reverse current

D

Soft recovery characteristics

D

Very fast reverse recovery time

D

Low reverse recovery peak current

BYW178

Vishay Telefunken

Applications

Ultra fast rectifier for switching mode power supplies

Absolute Maximum Ratings

Tj = 25_C

Parameter Test Conditions Type Symbol Value Unit

Reverse voltage

VR=V

=Repetitive peak reverse voltage
Peak forward surge current tp=10ms,

I

half sinewave
Repetitive peak forward current I
Average forward current I
Junction and storage temperature range Tj=T

Maximum Thermal Resistance

Tj = 25_C

Parameter Test Conditions Symbol Value Unit
Junction lead l=10mm, TL=constant R
Junction ambient on PC board with spacing 37.5mm R

thJL

thJA

Electrical Characteristics

Tj = 25_C

Parameter Test Conditions Type Symbol Min Typ Max Unit
Forward voltage IF=3A V
Reverse current VR=V

Reverse recovery current

Reverse recovery time

RRM

VR=V

, Tj=100°C I

RRM

IF=1A, diF/dtx–50A/ms,
V

=200V

Batt

IF=1A, diF/dtx–50A/ms,
V

=200V,iR=0.25xI

Batt

RM

Reverse recovery time (JEDEC) IF=0.5A, IR=1A, iR=0.25A t

I

I

R
R

RM

t

rr

rr

F

FSM

FRM

FAV

RRM

stg

94 9588

800 V

80 A

15 A

3 A

–55...+175

25 K/W
70 K/W

1.9 V
1

20

2.2 A

50 ns

60 ns

°

C

m

A

m

A

Document Number 86047
Rev. 2, 24-Jun-98

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BYW178

Vishay Telefunken

Characteristics (Tj = 25_C unless otherwise specified)

40

30

thJA

R – Therm. Resist. Junction / Ambient ( K/W )

94 9570

20

10

0

0 5 10 15 25

l – Lead Length ( mm )

ll

TL=constant

20

30

Figure 1. Typ. Thermal Resistance vs. Lead Length

2.0

1.6

1.2

4

3

2

1

FAV

I – Average Forward Current ( A )

fv20kHz

R

=25K/W

thJA

0

0

40 80 120 160

T

– Ambient Temperature ( °C )94 9471

amb

L=10mm

Figure 3. Max. Average Forward Current vs.

Ambient Temperature

5

dIF/dt=50A/ms

4

3

200

0.8

0.4

FAV

I – Average Forward Current ( A )

fv20kHz

R

=70K/W

0

thJA

0

40 80 120 160

T

– Ambient Temperature ( °C )94 9468

amb

PCB

Figure 2. Max. Average Forward Current vs.

Ambient Temperature

200

2

1

RM

I – Reverse Recovery Current ( A )

0

0.1 1

94 9571

IF – Forward Current ( A )

Figure 4. Typ. Reverse Recovery Current vs.

Forward Current

10

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Document Number 86047

Rev. 2, 24-Jun-98