BF621 datasheet(6/10 Pages) NXP

6 / 10 page

2004 Dec 14

NXP Semiconductors

Product data sheet

PNP high-voltage transistors

BF621; BF623

006aaa236

10−5

10−2

10−4

102

10−1

tp (s)

10−3

103

102

103

Zth

(K/W)

(6)

(7)

(8)

(5)

(1)

(10)

(9)

(4)

(3)

(2)

Fig.4 Transient thermal impedance as a function of pulse time; typical values.

(1)

δ = 1.

(2)

δ = 0.75.

(3)

δ = 0.5.

(4)

δ = 0.33.

(5)

δ = 0.2.

(6)

δ = 0.1.

(7)

δ = 0.05.

(8)

δ = 0.02.

(9)

δ = 0.01.

(10)

δ = 0.

Mounted on FR4 printed-circuit board; mounting pad for collector 1 cm2.

006aaa237

10−5

10−2

10−4

102

10−1

tp (s)

10−3

103

102

103

Zth

(K/W)

(6)

(7)

(8)

(10)

(1)

(5)

(4)

(3)

(9)

(2)

Fig.5 Transient thermal impedance as a function of pulse time; typical values.

(1)

δ = 1.

(2)

δ = 0.75.

(3)

δ = 0.5.

(4)

δ = 0.33.

(5)

δ = 0.2.

(6)

δ = 0.1.

(7)

δ = 0.05.

(8)

δ = 0.02.

(9)

δ = 0.01.

(10)

δ = 0.

Mounted on FR4 printed-circuit board; mounting pad for collector 6 cm2.

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