DYNEX DSF45425, DSF45424, DSF45422, DSF45420 Datasheet

DFS454

1/8

APPLICATIONS

■ Induction Heating

■ A.C. Motor Drives

■ Inverters And Choppers

■ Welding

■ High Frequency Rectification

■ UPS

FEATURES

■ Double Side Cooling

■ High Surge Capability

■ Low Recovery Charge

VOLTAGE RATINGS

KEY PARAMETERS

V

RRM

2500V

I

F(AV)

365A

I

FSM

3500A

Q

r

200µC

t

rr

2.0µs

CURRENT RATINGS

Symbol Parameter Conditions

Double Side Cooled

I

F(AV)

Mean forward current

I

F(RMS)

RMS value

I

F

Continuous (direct) forward current

Single Side Cooled (Anode side)

I

F(AV)

Mean forward current

I

F(RMS)

RMS value

I

F

Continuous (direct) forward current

UnitsMax.

Half wave resistive load, T

case

= 65oC 365 A

T

case

= 65oC 575 A

T

case

= 65oC 525 A

Half wave resistive load, T

case

= 65oC 242 A

T

case

= 65oC 380 A

T

case

= 65oC 335 A

2500
2400
2200
2000

DFS454 25
DFS454 24
DFS454 22
DFS454 20

Conditions

V

RSM

= V

RRM

+ 100V

Type Number Repetitive Peak

Reverse Voltage

V

RRM

V

Outline type code: M771.

See Package Detials for further information.

DFS454

Fast Recovery Diode

Advance Information

Replaces March 1998 version, DS4145-3.4 DS4145-4.0 January 2000

DFS454

2/8

SURGE RATINGS

Conditions

Max. Units

3.5 kA

61 x 10

3

A2sI2t for fusingI2t

Surge (non-repetitive) forward currentI

FSM

ParameterSymbol

10ms half sine; with 0% V

RRM, Tj

= 150oC

2.8 kA

39.2 x 10

3

A2sI2t for fusingI2t

Surge (non-repetitive) forward currentI

FSM

10ms half sine; with 50% V

RRM, Tj

= 150oC

-kA

-A

2

sI

2

t for fusingI2t

Surge (non-repetitive) forward currentI

FSM

10ms half sine; with 100% V

RRM, Tj

= 150oC

THERMAL AND MECHANICAL DATA

dc

Conditions Max. Units

o

C/W- 0.133Anode dc

Clamping force 3.5kN
with mounting compound

Thermal resistance - case to heatsink

R

th(c-h)

0.02

Double side

-

Single side

Thermal resistance - junction to case

R

th(j-c)

Single side cooled

Symbol Parameter

- 0.04

o

C/W

o

C/W

Cathode dc

- 0.147oC/W

Double side cooled

- 0.07

o

C/W

T

stg

Storage temperature range -55 175

o

C

kN4.03.0Clamping force-

T

vj

Virtual junction temperature

On-state (conducting) - 150

o

C

Min.

t

rr

50

Symbol Typ. Units

Parameter

V

FM

Forward voltage

I

RRM

Peak reverse current
Reverse recovery time

Q

RA1

Recovered charge (50% chord)

I

RM

Reverse recovery current

K

Soft factor

V

TO

Threshold voltage

r

T

Slope resistance

V

FRM

Forward recovery voltage di/dt = 1000A/µs, Tj = 125oC - 120 V

At Tvj = 150oC - 1.54 mΩ

At Tvj = 150oC - 1.64 V

1.3 - -

150 - A

- 200 µC

2.0 -

µs

At V

RRM

, T

case

= 150oC-mA

At 1000A peak, T

case

= 25oC - 3.1 V

Conditions Max.

I

F

= 750A, diRR/dt = 100A/µs

T

case

= 125oC, VR = 100V

CHARACTERISTICS

DFS454

3/8

CURVES

500

750

1000

1250

1500

1750

2000

Instantaneous forward current I

F

- (A)

1.0 2.0 3.0 4.0 5.0
Instantaneous forward voltage V

F

- (V)

Measured under pulse

conditions

Tj = 150˚C

Tj = 25˚C

DEFINITION OF K FACTOR AND Q

RA1

0.5x I

RR

I

RR

dIR/dt

t

1

t

2

τ

Q

RA1

= 0.5x IRR(t1 + t2)

k = t

1/t2

Fig. 1 Maximum (limit) forward characteristics