BC856AWT1 Datasheet, PDF (5/8 Pages) Motorola, Inc – CASE 419-02, STYLE 3 SOT-323/SC-70

1.0
0.7
0.5 ^{D = 0.5}
0.2
0.3
0.2
0.05
0.1
0.1
0.07
0.05
0.03
0.02
0.01
0.1 0.2
0.5
BC856AWT1,BWT1 BC857AWT1,BWT1 BC858AWT1,BWT1,CWT1
SINGLE PULSE
SINGLE PULSE
P(pk)
t1
t2
DUTY CYCLE, D = t1/t2
1.0 2.0
5.0 10
20
50 100 200
t, TIME (ms)
Figure 13. Thermal Response
Z_θJC(t) = r(t) R_θJC
R_θJC = 83.3°C/W MAX
Z_θJA(t) = r(t) R_θJA
R_θJA = 200°C/W MAX
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t1
TJ(pk) – TC = P(pk) R_θJC(t)
500 1.0 k 2.0 k
5.0 k 10 k
–200
1s
3 ms
–100
–50
TA = 25°C TJ = 25°C
BC558
–10
BC557
BC556
–5.0
–2.0
–1.0
BONDING WIRE LIMIT
THERMAL LIMIT
SECOND BREAKDOWN LIMIT
–5.0 –10
–30 –45 –65 –100
VCE, COLLECTOR–EMITTER VOLTAGE (V)
Figure 14. Active Region Safe Operating Area
The safe operating area curves indicate IC–VCE limits of the
transistor that must be observed for reliable operation. Collector load
lines for specific circuits must fall below the limits indicated by the
applicable curve.
The data of Figure 14 is based upon TJ(pk) = 150°C; TC or TA is
variable depending upon conditions. Pulse curves are valid for duty
cycles to 10% provided TJ(pk) ≤ 150°C. TJ(pk) may be calculated from
the data in Figure 13. At high case or ambient temperatures, thermal
limitations will reduce the power that can be handled to values less
than the limitations imposed by the secondary breakdown.
Motorola Small–Signal Transistors, FETs and Diodes Device Data
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