MJD2955-1 Ver la hoja de datos (PDF) - Motorola => Freescale
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MJD2955-1 Datasheet PDF : 6 Pages
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MJD2955 MJD3055
2
TJ = 25°C
1.6
1.2
VBE(sat) @ IC/IB = 10
0.8
VBE @ VCE = 3 V
0.4
VCE(sat) @ IC/IB = 10
0
0.1
0.2 0.3 0.5
1
23 5
10
IC, COLLECTOR CURRENT (AMP)
Figure 6. “On” Voltages, MJD2955
VCC
+ 30 V
+11 V
25 µs
0
RB
RC
SCOPE
–9 V
tr, tf ≤ 10 ns
51
D1
DUTY CYCLE = 1%
–4 V
RB and RC VARIED TO OBTAIN DESIRED CURRENT LEVELS
D1 MUST BE FAST RECOVERY TYPE, eg:
1N5825 USED ABOVE IB ≈ 100 mA
MSD6100 USED BELOW IB ≈ 100 mA
Figure 7. Switching Time Test Ciruit
1
0.7 D = 0.5
0.5
0.3
0.2
0.2
0.1
0.1 0.05
0.07
0.02
0.05
0.03
0.01
0.02 SINGLE PULSE
RθJC(t) = r(t) RθJC
RθJC = 6.25°C/W MAX
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
0.01
0.01 0.02 0.03 0.05 0.1
0.2 0.3 0.5 1
2 3 5 10 20 30 50
t, TIME (ms)
Figure 8. Thermal Response
100 200 300 500 1 k
10
5
3
2
1
0.5
0.3
0.1
0.05
0.03
0.02
0.01
0.6
TJ = 150°C
100 µs
1 ms
5 ms
500 µs
dc
WIRE BOND LIMIT
THERMAL LIMIT TC = 25°C (D = 0.1)
SECOND BREAKDOWN LIMIT
1
2
4 6 10
20
40 60
VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)
Figure 9. Maximum Forward Bias
Safe Operating Area
FORWARD BIAS SAFE OPERATING AREA
INFORMATION
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 9 is based on TJ(pk) = 150_C; TC is
variable depending on conditions. Second breakdown pulse
vlimits are valid for duty cycles to 10% provided TJ(pk)
150_C. TJ(pk) may be calculated from the data in Fig-
ure 8. 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.
4
Motorola Bipolar Power Transistor Device Data
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