IRF7738L2PbF

February 13, 2014

5

Fig 14. Maximum Avalanche Energy vs. Temperature

Fig 13. Maximum Safe Operating Area

Fig 15. Maximum Effective Transient Thermal Impedance, Junction-to-Case

Fig 16. Typical Avalanche Current Vs.Pulsewidth

25

50

75

100

125

150

175

Starting TJ , Junction Temperature (°C)

0

100

200

300

400

500

600

ID

TOP

17A

29A

BOTTOM 109A

1E-006

1E-005

0.0001

0.001

0.01

0.1

t1 , Rectangular Pulse Duration (sec)

0.001

0.01

0.1

1

10

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

τ

J

τ

J

τ

1

τ

1

τ

2

τ

2

τ

3

τ

3

R

1

R

1

R

2

R

2

R

3

R

3

Ci

i

/Ri

Ci=

τi/Ri

τ

τ

C

τ

4

τ

4

R

4

R

4

Ri (°C/W)

τi (sec)

0.00399

18.81517

0.81430

0.03055

0.15982

0.00014

0.62239

0.00402

1.0E-06

1.0E-05

1.0E-04

1.0E-03

1.0E-02

1.0E-01

tav (sec)

0.1

1

10

100

1000

0.05

Duty Cycle = Single Pulse

0.10

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming

∆Τj = 25°C and

Tstart = 150°C.

0.01

Allowed avalanche Current vs avalanche

pulsewidth, tav, assuming

∆Tj = 150°C and

Tstart =25°C (Single Pulse)

0.10

1

10

100

VDS, Drain-to-Source Voltage (V)

1

10

100

1000

10000

OPERATION IN THIS AREA

LIMITED BY RDS(on)

Tc = 25°C

Tj = 175°C

Single Pulse

100µsec

1msec

10msec

DC