Philips Semiconductors

BUK71/7907-40ATC

TrenchPLUS standard level FET

Product data

Rev. 01 — 9 August 2002

4 of 16

9397 750 09874

© Koninklijke Philips Electronics N.V. 2002. All rights reserved.

4.

Thermal characteristics

4.1 Transient thermal impedance

Table 3:

Thermal characteristics

Symbol

Parameter

Conditions

Min

Typ

Max Unit

thermal resistance from junction to ambient

SOT263B

vertical in still air

-

60

-

K/W

SOT426

minimum footprint; mounted on a PCB

-

50

-

K/W

thermal resistance from junction to

mounting base

Figure 4

-

-

0.55 K/W

Fig 4.

Transient thermal impedance from junction to mounting base as a function of pulse duration.

03ni29

single shot

0.2

0.1

0.05

0.02

10-3

10-2

10-1

1

10-6

10-5

10-4

10-3

10-2

10-1

1

10

tp(s)

Z th(j-mb)

(K/W)

δ = 0.5

tp

tp

T

P

t

T