For more information, please refer to the following application notes related to the power losses :

•

AN604: Calculation of conduction losses in a power rectifier

•

AN4021: Calculation of reverse losses on a power diode

1.1

Characteristics (curves)

Figure 1. Average forward power dissipation versus

average forward current

P

(W)

F(AV)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

I

(A)

F(AV)

T

δ=tp/T

tp

δ = 1

δ = 0.05

δ = 0.5

δ = 0.1

δ = 0.2

Figure 2. Average forward current versus ambient

temperature (δ= 0.5)

I

(A)

F(AV)

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

0

2 5

5 0

7 5

100

125

150

175

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

Rth(j-a)=100°C/W

SMA / SMA Flat Notch

DO-15

Rth(j-a)=200°C/W

T

(°C)

amb

T

δ=tp/T

tp

Figure 3. 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 4. Relative variation of thermal impedance junction

to ambient versus pulse duration (DO-15)

Z

/R

th(j-a)

th(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-01

1.E+00

1.E+01

1.E+02

1.E+03

Single pulse

DO-15

t (s)

p

STPS2150

Characteristics (curves)

DS3282 - Rev 8

page 3/13