background image

Philips Semiconductors

Product specification

 Damper diode

BY479X-1700 

 fast, high-voltage

FEATURES

SYMBOL

QUICK REFERENCE DATA

• Low forward volt drop

V

R

 = 1700 V

• Low Forward recovery voltage

• Fast switching

V

F

 

 1.2 V

• Soft recovery characteristic

• High thermal cycling performance

V

fr

 

 19 V

• Isolated mounting tab

I

FWM

 = 10 A

I

FRM

 

 100 A

t

fr

 

 300 ns

GENERAL DESCRIPTION

PINNING

SOD113

Glass-passivated double diffused

PIN

DESCRIPTION

rectifier diode featuring fast forward

recovery and low forward recovery

1

cathode

voltage. The device is intended for

use in multi-sync monitor deflection

2

anode

circuits up to 64kHz. The device is

designed to withstand transient

tab

isolated

reverse voltages up to 1700V.

The BY479X series is supplied in

the conventional leaded SOD113

package.

LIMITING VALUES

Limiting values in accordance with the Absolute Maximum System (IEC 134).

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

V

RSM

Peak non-repetitive reverse

-

1700

V

voltage during flash-over of

picture tube

V

RRM

Peak repetitive reverse voltage

t = 3.5 

µ

s; f = 64kHz

-

1700

V

V

RWM

Crest working reverse voltage

-

1300

V

I

FWM

Peak working forward current

1

f = 64kHz; T

hs

 

 126 ˚C

-

10

A

I

FRM

Peak repetitive forward current

t = 100 

µ

s

-

100

A

I

FSM

Peak non-repetitive forward

t = 10 ms

-

100

A

current

t = 8.3 ms

-

110

A

sinusoidal; T

j

 = 150 ˚C prior to

surge; with reapplied V

RWM(max)

T

stg

Storage temperature

-40

150

˚C

T

j

Operating junction temperature

-

150

˚C

k

a

1

2

1

2

case

Including worst case forward recovery losses, see fig:5.

September 1998

1

Rev 1.200

background image

Philips Semiconductors

Product specification

 Damper diode

BY479X-1700 

 fast, high-voltage

ISOLATION LIMITING VALUE & CHARACTERISTIC

T

hs

 = 25 ˚C unless otherwise specified

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

V

isol

R.M.S. isolation voltage from

f = 50-60 Hz; sinusoidal

-

2500

V

both terminals to external

waveform;

heatsink

R.H. 

 65% ; clean and dustfree

C

isol

Capacitance from both terminals f = 1 MHz

-

10

-

pF

to external heatsink

THERMAL RESISTANCES

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

R

th j-hs

Thermal resistance junction to

with heatsink compound

-

-

4.8

K/W

heatsink

without heatsink compound

-

-

5.9

K/W

R

th j-a

Thermal resistance junction to

in free air

-

55

-

K/W

ambient

STATIC CHARACTERISTICS

T

j

 = 25 ˚C unless otherwise stated

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

V

F

Forward voltage

I

F

 = 6.5 A

-

0.95

1.3

V

I

F

 = 6.5 A; T

j

 = 125 ˚C

-

0.85

1.2

V

I

R

Reverse current

V

R

 = V

RWMmax

-

-

0.25

mA

V

R

 = V

RWMmax

; T

j

 = 125 ˚C

-

-

1.0

mA

DYNAMIC CHARACTERISTICS

T

j

 = 25 ˚C unless otherwise stated

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

V

fr

Forward recovery voltage

I

F

 = 6.5 A; dI

F

/dt = 50 A/

µ

s

-

12

19

V

t

fr

Forward recovery time

I

F

 = 6.5 A; dI

F

/dt = 50 A/

µ

s; V

F

 = 5 V

-

200

300

ns

I

F

 = 6.5 A; dI

F

/dt = 50 A/

µ

s; V

F

 = 2 V

-

400

-

ns

t

rr

Reverse recovery time

I

F

 = 1 A; -dI

F

/dt = 50 A/

µ

s; V

R

 

 30 V

-

250

350

ns

Q

s

Reverse recovery charge

I

F

 = 2 A; -dI

F

/dt = 20 A/

µ

s; V

R

 

 30 V

-

2.0

3.0

µ

C

September 1998

2

Rev 1.200

background image

Philips Semiconductors

Product specification

 Damper diode

BY479X-1700 

 fast, high-voltage

Fig.1.  Definition of Vfr and tfr

Fig.2.   Definition of t

rr

 and Q

s

Fig.3.  Basic horizontal deflection circuit.

Fig.4.  Maximum allowable pulse width t

p

 versus line

frequency; Basic horizontal deflection circuit.

Fig.5.  Total dissipation P

tot

 = f(I

FWM

); including forward

recovery losses; Basic horizontal deflection circuit.

Fig.6.   Typical and maximum forward characteristic

I

F

 = f(V

F

); parameter T

j

time

time

V F

V

fr

V F

I

F

10%

5V / 2V

tfr

10

100

1

10

100

BY479X-1700

line frequency / kHz

Maximum pulse width / us

V

time

VRRM

width tp

period T

pulse

100%

time

dI

dt

F

I

R

I

F

trr

25%

Qs

0

2

4

6

8

10

0

1

2

3

4

5

6

BY479X

IFWM / A

Ptot / W

f = 64 kHz

Ths / C

150

140.4

130.8

121.2

IFWM

ton

IF

time

Line output transformer

VCC

D1

LY

Cs

Cf

deflection transistor

0

1

2

BY459

VF / V

IF / A

30 

20 

10 

0.5

1.5

max

typ

Tj = 125 C

Tj = 25 C

September 1998

3

Rev 1.200

background image

Philips Semiconductors

Product specification

 Damper diode

BY479X-1700 

 fast, high-voltage

Fig.7.  Typical and maximum V

fr

 = f(dI

F

/dt); I

F

 = 6.5A;

T

j

 = 25˚C

Fig.8.   Maximum reverse recovery time t

rr

 = f(dI

F

/dt);

parameter T

j

; V

R

30V

Fig.9.   Transient thermal impedance Z

th

 = f(t

p

)

0

100

200

BY479

dIF/dt (A/us)

Vfr / V

30 

20 

10 

50

150

max

typ

1us

10us

100us

1ms

10ms

100ms

1s

10s

0.001

0.01

0.1

1

10

BY459F

pulse width, tp (s)

Transient thermal impedance, Zth j-hs (K/W)

D = 

t

p

t

p

T

T

P

t

D

1

10

100

BY459

-dIF/dt (A/us)

trr / us

1.5 

0.5 

IF = 10 A

2 A

5 A

0

1 A

September 1998

4

Rev 1.200

background image

Philips Semiconductors

Product specification

 Damper diode

BY479X-1700 

 fast, high-voltage

MECHANICAL DATA

Dimensions in mm

Net Mass: 2 g

Fig.10.  SOD113; The seating plane is electrically isolated from all terminals.

Notes

1. Refer to mounting instructions for F-pack envelopes.

2. Epoxy meets UL94 V0 at 1/8".

10.3

max

3.2

3.0

4.6

max

2.9 max

2.8

seating

plane

6.4

15.8

max

0.6

2.5

2.54

5.08

1

2

3 max.

not tinned

3

0.5

2.5

0.9

0.7

M

0.4

15.8 

max.

19

max.

13.5

min.

Recesses (2x)

   2.5

0.8 max. depth

1.0 (2x)

September 1998

5

Rev 1.200

background image

Philips Semiconductors

Product specification

 Damper diode

BY479X-1700 

 fast, high-voltage

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.

September 1998

6

Rev 1.200