MJD122 Ver la hoja de datos (PDF) - Motorola => Freescale
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MJD122 Datasheet PDF : 8 Pages
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RB & RC VARIED TO OBTAIN DESIRED CURRENT LEVELS
D1, MUST BE FAST RECOVERY TYPE, e.g.:
1N5825 USED ABOVE IB ≈ 100 mA
MSD6100 USED BELOW IB ≈ 100 mA
V2
APPROX
TUT
RB
VCC
– 30 V
RC SCOPE
+8 V
0
51 D1
≈ 8 k ≈ 120
V1
APPROX
–12 V
+4V
25 µs
tr, tf ≤ 10 ns
DUTY CYCLE = 1%
FOR td AND tr, D1 IS DISCONNECTED
AND V2 = 0
FOR NPN TEST CIRCUIT REVERSE ALL POLARITIES.
Figure 9. Switching Times Test Circuit
5
3
ts
2
MJD122 MJD127
PNP
NPN
1
tf
0.7
0.5
0.3
0.2
0.1
0.07
0.05
0.1
VCC = 30 V
IC/IB = 250
IB1 = IB2
TJ = 25°C
0.2 0.3
td @ VBE(off) = 0 V
0.5 0.7 1
2
tr
3 5 7 10
IC, COLLECTOR CURRENT (AMP)
Figure 10. Switching Times
1
0.7 D = 0.5
0.5
0.3
0.2
0.2
0.1
0.1 0.05
0.07 0.01
0.05
0.03 SINGLE PULSE
0.02
0.01
0.01 0.02 0.03 0.05 0.1
RθJC(t) = r(t) RθJC
RθJC = 6.25°C/W
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t1
TJ(pk) – TC = P(pk) θJC(t)
P(pk)
t1
t2
DUTY CYCLE, D = t1/t2
0.2 0.3 0.5
1
2 3 5 10
t, TIME OR PULSE WIDTH (ms)
20 30 50
Figure 11. Thermal Response
100 200 300 500 1000
20
15
10
5
3
2
1 TJ = 150°C
500 µs
100 µs
1 ms
5 ms
0.5
0.3
BONDING WIRE LIMIT
0.2
THERMAL LIMIT
0.1
TC = 25°C (SINGLE PULSE)
SECOND BREAKDOWN LIMIT
0.05
CURVES APPLY BELOW RATED VCEO
0.03
0.02
1
2 3 5 7 10
20 30
dc
50 70 100
VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)
Figure 12. Maximum Forward Bias
Safe Operating rea
There are two limitations on the power handling ability of a
transistor: average junction temperature and second break-
down. Safe operating area curves indicate IC – VCE limits of
the transistor that must be observed for reliable operation;
i.e., the transistor must not be subjected to greater dissipa-
tion than the curves indicate.
The data of Figure 12 is based on TJ(pk) = 150_C; TC is
variable depending on conditions. Second breakdown pulse
limits are valid for duty cycles to 10% provided TJ(pk)
< 150_C. TJ(pk) may be calculated from the data in Fig-
ure 11. At high case temperatures, thermal limitations will re-
duce the power that can be handled to values less than the
limitations imposed by second breakdown.
Motorola Bipolar Power Transistor Device Data
5
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