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BC557BRL1G Datasheet(PDF) 5 Page - ON Semiconductor |
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BC557BRL1G Datasheet(HTML) 5 Page - ON Semiconductor |
5 / 7 page BC556B, BC557A, B, C, BC558B http://onsemi.com 5 Figure 13. Thermal Response t, TIME (ms) 1.0 2.0 5.0 1.0 0.5 0.2 0.1 0.7 0.5 0.3 0.2 0.1 0.07 0.05 0.03 0.02 0.01 20 50 10 200 500 100 1.0k 2.0k 5.0k 10 Figure 14. Active Region − Safe Operating Area VCE, COLLECTOR−EMITTER VOLTAGE (V) −200 −1.0 TA = 25°C D = 0.5 0.2 0.1 0.05 SINGLE PULSE SINGLE PULSE BONDING WIRE LIMIT THERMAL LIMIT SECOND BREAKDOWN LIMIT 3 ms TJ = 25°C ZqJC(t) = (t) RqJC RqJC = 83.3°C/W MAX ZqJA(t) = r(t) RqJA RqJA = 200°C/W MAX D CURVES APPLY FOR POWER PULSE TRAIN SHOWN READ TIME AT t1 TJ(pk) − TC = P(pk) RqJC(t) t1 t2 P(pk) DUTY CYCLE, D = t1/t2 −100 −50 −10 −5.0 −2.0 −5.0 −10 −30 −45 −65 −100 1 s BC558 BC557 BC556 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 than can be handled to values less than the limitations imposed by second breakdown. |
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