MBR120LSF datasheet(4/5 Pages) ONSEMI

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MBR120LSF, NRVB120LSF

http://onsemi.com

VR, REVERSE VOLTAGE (VOLTS)

1000

100

6.0

2.0

4.0

8.0

TJ = 25°C

Figure 7. Capacitance

VR, DC REVERSE VOLTAGE (VOLTS)

125

100

6.0

2.0

4.0

8.0

Figure 8. Typical Operating Temperature

Derating*

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

verse 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.

105

110

115

120

RqJA = 25.6°C/W

400

°C/W

324.9

°C/W

235

°C/W

130

°C/W

Figure 9. Thermal Response

1000

0.1

0.00001

t1, TIME (sec)

1000

0.0001

0.001

0.01

100

0.000001

0.1

100

P(pk)

DUTY CYCLE, D = t1/t2

qJA = 321.8 °C/W

Test Type > Min Pad < Die Size 38x38 @ 75% mils

D = 0.5

SINGLE PULSE

0.2

0.1

0.05

0.01

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