BC857BLT3 ON Semiconductor, BC857BLT3 Datasheet - Page 5

• Manufacturer Part Number: BC857BLT3
• Description: General Purpose Transistors
• Manufacturer: ON Semiconductor

−200
−100
−5.0
−2.0
−50
−10
−1.0
0.07
0.05
0.03
0.02
0.01
1.0
0.7
0.5
0.3
0.2
0.1
0.1
Figure 14. Active Region Safe Operating Area
0.2
D = 0.5
0.2
0.1
V
CE
BONDING WIRE LIMIT
THERMAL LIMIT
SECOND BREAKDOWN LIMIT
, COLLECTOR−EMITTER VOLTAGE (V)
0.05
−5.0
T
0.5
A
= 25 C
BC558, BC559
1.0
SINGLE PULSE
−10
T
SINGLE PULSE
BC557
BC556
J
1 s
= 25 C
2.0
−30 −45 −65 −100
Figure 13. Thermal Response
5.0
BC856ALT1 Series
3 ms
http://onsemi.com
10
t, TIME (ms)
20
5
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.
T
valid for duty cycles to 10% provided T
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.
A
The data of Figure 14 is based upon T
is variable depending upon conditions. Pulse curves are
P
(pk)
The safe operating area curves indicate I
DUTY CYCLE, D = t
50
t
1
100
t
2
200
1
/t
2
500
Z
R
Z
R
D CURVES APPLY FOR POWER
PULSE TRAIN SHOWN
READ TIME AT t
T
qJC
qJA
J(pk)
qJC
qJA
1.0 k
(t) = r(t) R
(t) = r(t) R
= 200 C/W MAX
= 83.3 C/W MAX
− T
C
J(pk)
J(pk)
= P
2.0 k
qJC
qJA
(pk)
C
= 150 C; T
1
−V
R
150 C. T
qJC
CE
(t)
5.0 k 10 k
limits of
J(pk)
C
or