To evaluate the conduction losses, use the following equation:

P = 0.425 x IF(AV) + 0.0088 x IF 2 (RMS)

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 (anode terminals short circuited)

0

2

4

6

8

10

12

14

16

18

20

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

IF(AV)(A)

δ = 0.05

δ = 0.1

δ = 0.2

δ = 0.5

δ = 1

T

δ= tp/T

tp

PF(AV)(W)

Figure 2. Average forward current versus ambient

temperature (δ = 0.5, anode terminals short circuited)

0

2

4

6

8

10

12

14

16

18

20

22

0

25

50

75

100

125

150

Tamb(°C)

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

Rth(j-a) = 15 °C/W

T

δ= tp/T

tp

TO-220AB/I²PAK/D²PAK

TO-220FPAB

IF(AV)(A)

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. Reverse leakage current versus reverse voltage

applied (typical values)

1.E-03

1.E-02

1.E-01

1.E+00

1.E+01

1.E+02

0

10

20

30

40

50

60

70

80

90

100

VR(V)

Tj = 150 °C

Tj = 125 °C

Tj = 25 °C

Tj = 100 °C

Tj = 75 °C

Tj = 50 °C

IR(mA)

STPS20M100S

Characteristics (curves)

DS6169 - Rev 5

page 3/15