FDR0540 datasheet(4/5 Pages) FS

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TL, LEAD TEMPERATURE (

°C)

0.8

0.4

0.3

0.2

0.1

IO, AVERAGE FORWARD CURRENT (AMPS)

0.1

0.45

0.40

0.35

0.15

0.05

0.4

120

100

0.5

0.2

0.3

0.5

0.8

0.10

140

0.6

SQUARE WAVE

Ipk/Io =

Ipk/Io = 5

Ipk/Io = 10

Ipk/Io = 20

Ipk/Io = 10

Ipk/Io = 5

Ipk/Io =

SQUARE WAVE

0.7

0.30

0.20

0.25

0.6

0.7

FREQ = 20 kHz

VR, REVERSE VOLTAGE (VOLTS)

100

VR, DC REVERSE VOLTAGE (VOLTS)

118

114

112

110

5.0

116

120

126

* Reverse power dissipation and the possibility of thermal runaway must be considered when operating this device under any

reverse voltage conditions. Calculations of TJ therefore must include forward and reverse power effects. The allowable operating

TJ may be calculated from the equation:

TJ = TJmax − r(t)(Pf + Pr) where

r(t) = thermal impedance under given conditions,

Pf = forward power dissipation, and

Pr = reverse power dissipation

This graph displays the derated allowable TJ due to reverse bias under DC conditions only and is calculated as

TJ = TJmax − r(t)Pr, where r(t) = Rthja. For other power applications further calculations must be performed.

Rtja = 118

°C/W

180°C/W

149°C/W

206°C/W

228°C/W

TJ = 25°C

122

124

2009. 06. 24

4/5

Revision No : 0

FDR0540

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