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

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

IF(AV)(A)

δ = 0.05

δ = 0.1

δ = 0.2

δ = 0.5

δ = 1

PF(AV)(W)

T

δ= tp/T

tp

Figure 2. Average forward current versus ambient

temperature (SMA, δ = 0.5)

IF(AV)(A)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0

25

50

75

100

125

150

175

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

T

δ= tp/T

tp

SMA

Tamb(°C)

Figure 3. Average forward current versus ambient

temperature (SMB, δ = 0.5)

IF(AV)(A)

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0

25

50

75

100

125

150

175

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

T

= tp/T

tp

δ

SMB

Tamb(°C)

Figure 4. Average forward current versus ambient

temperature (SOD123Flat, SMA Flat Notch, δ = 0.5)

IF(AV)(A)

0

1

2

3

4

5

0

25

50

75

100

125

150

175

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

T

= tp/T

tp

δ

SOD123Flat

Tamb(°C)

SMA Flat Notch

STPS1L40

Characteristics (curves)

DS1244 - Rev 9

page 3/16