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BC856A Arkusz danych(PDF) 6 Page - Yea Shin Technology Co., Ltd |
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BC856A Arkusz danych(HTML) 6 Page - Yea Shin Technology Co., Ltd |
6 / 7 page http://www.yeashin.com 6 REV.02 20130403 BC85x Series t, TIME (ms) Figure 13. Thermal Response V CE , COLLECTOR–EMITTER VOLTAGE (V) Figure 14. Active Region Safe Operating Area BONDING WIRE LIMIT THERMAL LIMIT SECOND BREAKDOWN LIMIT The safe operating area curves indicate I C –V CE 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 T J(pk) = 150°C; T C or T A is variable depending upon conditions. Pulse curves are valid for duty cycles to 10% provided T J(pk) < 150°C. T J(pk) may be calcu- lated 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 sec- ondary breakdown. BC558 BC557 BC556 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 t 1 T J(pk) – T C = P (pk) R θJC (t) DUTY CYCLE, D = t 1 /t 2 t 1 t 2 P (pk) SINGLE PULSE SINGLE PULSE T A= 25°C T J= 25°C 3 ms 1s 1.0 0.7 0.5 0.3 0.2 0.1 0.07 0.05 0.03 0.02 0.01 D=0.5 0.2 0.1 0.05 0.1 0.2 0.5 1.0 2.0 5.0 10 20 50 100 200 500 1.0k 2.0k 5.0k 10k –1.0 –0.5 –10 –30 –45 –65 –100 –200 –100 –50 –10 –5.0 –2.0 DEVICE CHARACTERISTICS |
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