AUIRF7103QTR 查看數據表（PDF） - Infineon Technologies

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AUIRF7103QTR

AUTOMOTIVE GRADE

Infineon Technologies 

AUIRF7103Q

1000

100

10

1

0.1

Duty Cycle = Single Pulse

0.01

0.05

0.10

Allowed avalanche Current vs

avalanche pulsewidth, tav

assuming  Tj = 25°C due to

avalanche losses

0.01

1.0E-08

1.0E-07

1.0E-06

1.0E-05

1.0E-04

1.0E-03

tav (sec)

1.0E-02

1.0E-01

1.0E+00

1.0E+01

Fig 19. Typical Avalanche Current vs. Pulse width

25

TOP

Single Pulse

BOTTOM 10% Duty Cycle

20

ID = 3.0A

15

10

5

0

25

50

75

100 125 150 175

Starting TJ , Junction Temperature (°C)

Fig 20. Maximum Avalanche Energy

vs. Temperature

Notes on Repetitive Avalanche Curves , Figures 19, 20:

(For further info, see AN-1005 at www.infineon.com)

1. Avalanche failures assumption:

Purely a thermal phenomenon and failure occurs at a temperature far in

excess of Tjmax. This is validated for every part type.

2. Safe operation in Avalanche is allowed as long as Tjmax is not exceeded.

3. Equation below based on circuit and waveforms shown in Figures 16b, 16c.

4. PD (ave) = Average power dissipation per single avalanche pulse.

5. BV = Rated breakdown voltage (1.3 factor accounts for voltage increase

during avalanche).

6. Iav = Allowable avalanche current.

7. T = Allowable rise in junction temperature, not to exceed Tjmax (assumed as

25°C in Figure 11, 16).

tav = Average time in avalanche.

D = Duty cycle in avalanche = tav ·f

ZthJC(D, tav) = Transient thermal resistance, see Figures 11)

PD (ave) = 1/2 ( 1.3·BV·Iav) = T/ ZthJC

Iav = 2T/ [1.3·BV·Zth]

EAS (AR) = PD (ave)·tav

8

2015-9-30

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