IRFS7430TRLPBF datasheet(6/11 Pages) IRF

6 / 11 page

IRFS/SL7430PbF

Submit Datasheet Feedback

November 19, 2013

Fig 14. Maximum Effective Transient Thermal Impedance, Junction-to-Case

Fig 15. Avalanche Current vs.Pulsewidth

Fig 16. Maximum Avalanche Energy vs. Temperature

Notes on Repetitive Avalanche Curves , Figures 15, 16:

(For further info, see AN-1005 at www.irf.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 asTjmax is not exceeded.

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

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.

∆T = Allowable rise in junction temperature, not to exceed Tjmax (assumed as

25°C in Figure 15, 16).

tav = Average time in avalanche.

D = Duty cycle in avalanche = tav ·f

ZthJC(D, tav) = Transient thermal resistance, see Figures 14)

PD (ave) = 1/2 ( 1.3·BV·Iav) =

DT/ ZthJC

Iav = 2DT/ [1.3·BV·Zth]

EAS (AR) = PD (ave)·tav

100

125

150

175

Starting TJ , Junction Temperature (°C)

100

200

300

400

500

600

700

800

TOP

Single Pulse

BOTTOM 1.0% Duty Cycle

ID = 100A

1E-006

1E-005

0.0001

0.001

0.01

0.1

t1 , Rectangular Pulse Duration (sec)

0.0001

0.001

0.01

0.1

0.20

0.10

D = 0.50

0.02

0.01

0.05

SINGLE PULSE

( THERMAL RESPONSE )

Notes:

1. Duty Factor D = t1/t2

2. Peak Tj = P dm x Zthjc + Tc

1.0E-06

1.0E-05

1.0E-04

1.0E-03

1.0E-02

1.0E-01

tav (sec)

100

1000

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming

∆Τ j = 25°C and

Tstart = 150°C.

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming

∆Tj = 150°C and

Tstart =25°C (Single Pulse)

IRFS7430TRLPBF 데이터시트(PDF) 6 Page - International Rectifier

IRFS7430TRLPBF 데이터시트(HTML) 6 Page - International Rectifier

Html Pages

1 2 3 4 5 6 7 8 9 10 11

데이터시트 다운로드

링크 URL