DYNEX DFB5435, DFB5434, DFB5433, DFB5432, DFB5431 Datasheet

DFB54

DFB54

Fast Recovery Diode

Replaces March 1998 version, DS4219-2.4 DS4219-3.0 January 2000

APPLICATIONS

■ Power Supplies

■ Freewheel Diode

■ Battery Chargers

■ D.C. Motor Control

■ Welding

■ Rectification

FEATURES

■ Double Side Cooling

■ High Surge Capability

■ Low Recovery Charge

VOLTAGE RATINGS

Type Number Repetitive Peak

Reverse Voltage

V

RRM

V

DFB54 35
DFB54 34
DFB54 33
DFB54 32
DFB54 31
DFB54 30

3500
3400
3300
3200
3100
3000

Lower voltage grades available.

CURRENT RATINGS

Conditions

= V

V

RSM

RRM

+ 100V

KEY PARAMETERS

V

RRM

I

F(AV)

I

FSM

Q

r

t

rr

Outline type code: DO200AD.

See Package Details for further information.

3500V

2135A

20000A

1500µC

6.5µs

Symbol Parameter Conditions

Double Side Cooled

I

F(AV)

I

F(RMS)

I

Mean forward current

RMS value

F

Continuous (direct) forward current

Half wave resistive load, T

= 65oC 3350 A

T

case

T

= 65oC 3060 A

case

Single Side Cooled (Anode side)

I

F(AV)

I

F(RMS)

I

F

Mean forward current

RMS value

Continuous (direct) forward current

Half wave resistive load, T

T

= 65oC 2080 A

case

T

= 65oC 1810 A

case

= 65oC 2135 A

case

= 65oC 1320 A

case

UnitsMax.

1/7

DFB54

SURGE RATINGS

ParameterSymbol

FSM

FSM

Surge (non-repetitive) forward currentI

Surge (non-repetitive) forward currentI

THERMAL AND MECHANICAL DATA

Symbol Parameter

R

R

th(j-c)

th(c-h)

Thermal resistance - junction to case

Thermal resistance - case to heatsink

Conditions

10ms half sine; with 0% V

10ms half sine; with 50% V

Conditions Max. Units

Double side cooled

Single side cooled

Clamping force 44kN
with mounting compound

= 150oC

RRM, Tj

RRM, Tj

dc

Cathode dc
Double side

Single side

= 150oC

Max. Units

20.0 kA

2000 x 10

3

16 kA

1280 x 10

3

Min.

- 0.013

- 0.027oC/W

0.003

-

- 0.006

A2sI2t for fusingI2t

A2sI2t for fusingI2t

o

C/W

o

C/W- 0.025Anode dc

o

C/W

o

C/W

T

T

stg

Virtual junction temperature

vj

Storage temperature range -55 150

Forward (conducting) - 150

CHARACTERISTICS

Symbol Typ. Units

V

FM

I

RRM

t

rr

Q

RA1

I

RM

Forward voltage

Peak reverse current
Reverse recovery time

Recovered charge (50% chord)
Reverse recovery current

K Soft factor

V

TO

Threshold voltage

Parameter

Conditions Max.

At 1500A peak, T
At V

, T

RRM

= 150oC-mA

case

= 25oC - 1.7 V

case

100

- 6.5

= 1000A, diRR/dt = 100A/µs

I

F

T

= 150oC, VR = 100V

case

- 1500 µC

- 450 A

---

At Tvj = 150oC - 1.15 V

o

o

kN48.439.6Clamping force-

µs

C
C

2/7

r

T

V

FRM

Slope resistance

At Tvj = 150oC - 0.32 mΩ

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

DFB54

DEFINITION OF K FACTOR AND Q

Q

= 0.5x IRR(t1 + t2)

RA1

dIR/dt

0.5x I

t

1

RR

I

RR

k = t

t

2

1/t2

CURVES

5000

4000

- (A)

F

Measured under pulse conditions

RA1

τ

3000

2000

Tj = 150˚C

Instantaneous forward current I

1000

Tj = 25˚C

0

0.5 1.0 1.5 2.0 2.5
Instantaneous forward voltage V

Fig.1 Maximum (limit) forward characteristics

- (V)

F

3.0

3/7