Data Sheet

TIP120, TIP121, TIP122 (NPN); TIP125, TIP126, TIP127 (PNP)
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4
Figure 3. Switching Times Test Circuit
5.0
0.1
Figure 4. Switching Times
I
C
, COLLECTOR CURRENT (AMP)
t, TIME (s)μ
2.0
1.0
0.5
0.05
0.2 0.3 0.5 0.7 1.0 2.0 3.0 10
0.3
0.7
PNP
NPN
t
f
t
r
t
s
t
d
@ V
BE(off)
= 0
V
2
approx
+8.0 V
V
1
approx
-12 V
t
r
, t
f
10 ns
DUTY CYCLE = 1.0%
25 ms
0
R
B
51
D
1
+4.0 V
V
CC
-30 V
R
C
TUT
8.0 k
120
SCOPE
for t
d
and t
r
, D
1
is disconnected
and V
2
= 0
For NPN test circuit reverse all polarities.
R
B
& R
C
VARIED TO OBTAIN DESIRED CURRENT LEVELS
D
1
MUST BE FAST RECOVERY TYPE, eg:
1N5825 USED ABOVE I
B
100 mA
MSD6100 USED BELOW I
B
100 mA
V
CC
= 30 V
I
C
/I
B
= 250
I
B1
= I
B2
T
J
= 25°C
3.0
0.2
0.1
0.07
5.0 7.0
Figure 5. Thermal Response
t, TIME (ms)
1.0
0.01
0.01
0.5
0.2
0.1
0.05
0.02
r(t), TRANSIENT THERMAL RESISTANCE
(NORMALIZED)
0.05 0.1 0.2 0.5 1.0 2.0 5.0 10 20 50 100 200 1.0 k500
Z
q
JC(t)
= r(t) R
q
JC
R
q
JC
= 1.92°C/W MAX
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t
1
T
J(pk)
- T
C
= P
(pk)
Z
q
JC(t)
P
(pk)
t
1
t
2
DUTY CYCLE, D = t
1
/t
2
D = 0.5
0.2
0.05
0.02
0.01
SINGLE PULSE
0.1
0.7
0.3
0.07
0.03
0.02