BU406, BU407
NPN SILICON POWER TRANSISTORS
AUGUST 1978 - REVISED MARCH 1997
PARAMETER MEASUREMENT INFORMATION
V BB+
5.6
Ω
22
Ω
7.5
Ω
BY205
V cc = 24V
47
Ω
SET
IB
100
Ω
100
Ω
+4V
INPUT
0
2N5337
2N6191
TIP31
TIP31
TIP31
1 k
Ω
14.8
µ
H
TUT
50
Ω
TIP32
TIP32
Current
Probes
5 pF
OUTPUT
BY205
240
µ
H
22
Ω
V BB-
22
Ω
Figure 1. Inductive-Load Switching Test Circuit
64
µ
s
42
µ
s
I
B(end)
50%
0
IB
t
IC
0
s
0.1 A
t off
t
off
is the time for the collector
current I
C
to decrease to 0.1 A
Vfly
after the collector to emitter
voltage V
CE
has risen 3 V into
its flyback excursion.
V
CE
0
3V
Figure 2. Inductive-Load Switching Waveforms
PRODUCT
INFORMATION
3
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