IRF7902PbF

www.irf.com

7

Fig 25. Maximum Effective Transient Thermal Impedance, Junction-to-Ambient (Q1)

Fig 26. Maximum Effective Transient Thermal Impedance, Junction-to-Ambient (Q2)

Fig 27. Layout Diagram

1E-006

1E-005

0.0001

0.001

0.01

0.1

1

10

100

1000

t1 , Rectangular Pulse Duration (sec)

0.01

0.1

1

10

100

1000

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 Zthja + Tc

Ri (°C/W)

3.031518

0.000064

7.306226

0.005879

51.39689

0.44864

28.2607

12.37

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=

τi/Ri

Ci=

τi/Ri

τ

τ

A

τ

4

τ

4

R

4

R

4

1E-006

1E-005

0.0001

0.001

0.01

0.1

1

10

100

1000

t1 , Rectangular Pulse Duration (sec)

0.01

0.1

1

10

100

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 Zthja + Tc

Ri (°C/W)

2.445866

0.000118

9.382382

0.020778

33.63681

0.70843

17.05217

24.5

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=

τi/Ri

Ci=

τi/Ri

τ

τ

A

τ

4

τ

4

R

4

R

4