1.1

Characteristics (curves)

Figure 1. Average forward power dissipation versus

average forward current

0.0

0.5

1.0

1.5

2.0

2.5

P

(W)

F(AV)

T

δ =tp/T

tp

I

(A)

F(AV)

δ = 1

δ = 0.05

δ = 0.1

δ = 0.2

δ = 0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

Figure 2. Average forward current versus ambient

temperature (δ = 0.5) (SMB, SMC, DPAK)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

I

( A)

F(AV)

T

δ = tP/T

tP

0

25

50

75

100

125

150

Rth(j-a) = Rth(j-c)

Rth(j-a) = 65 °C/W

Tamb(°C)

DPAK

Rth(j-a) = Rth(j-l)

SMB

Rth(j-a) = Rth(j-l)

SMC

Figure 3. Average forward current versus ambient

temperature (δ = 0.5, SMB Flat)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

T

δ = tP/T

tP

0

25

50

75

100

125

150

Rth(j-a) = Rth(j-l)

IF(AV)(A)

Tamb(°C)

Figure 4. Normalized avalanche power derating versus

pulse duration (Tj = 125 °C)

P

(tp)

P

(10 µs)

ARM

ARM

0.001

0.01

0.1

1

1

10

100

1000

t (µs)

p

Figure 5. Relative variation of thermal impedance junction

to ambient versus pulse duration (SMB)

Zth(j-a)/Rth(j-a)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.E-02

1.E-01

1.E+00

1.E+01

1.E+02

1.E+03

Single pulse

tp(s)

Figure 6. Relative variation of thermal impedance junction

to lead versus pulse duration (SMB flat)

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.E-04

1.E-03

1.E-02

1.E-01

1.E+00

1.E+01

tp(s)

Z

/ R

th(j-l)

th(j-l)

Single pulse

STPS340

Characteristics (curves)

DS0792 - Rev 13

page 4/19