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BC647CDW1T1 Datasheet(PDF) 5 Page - Leshan Radio Company |
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BC647CDW1T1 Datasheet(HTML) 5 Page - Leshan Radio Company |
5 / 5 page LESHAN RADIO COMPANY, LTD. BC846b–5/5 BC846BDW1T1, BC847BDW1T1, BC847CDW1T1, BC848BDW1T1, BC848CDW1T1 SINGLE PULSE t 1 Z θJA (t) = r(t) R θJA R θJA = 328°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) t 2 P (pk) DUTY CYCLE, D = t 1 /t 2 D=0.5 0.2 0.1 0.05 0.02 0.01 t, TIME (ms) Figure 11. Thermal Response 0 1.0 10 100 1.0K 10K 100K 1.0M 1.0 0.1 0.01 0.001 -200 -100 -50 -10 -5.0 -2.0 -1.0 -5.0 -10 -30 -45 -65 -100 V CE , COLLECTOR–EMITTER VOLTAGE (V) Figure 12. Active Region Safe Operating Area The safe operating area curves indicate I C –V CE limits of thetransistor 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 12 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 calculated from the data in Figure 12. At high case or ambient temperatures, thermal limitations will reduce the power that can be handled to values less than the limita- tions imposed by the secondary breakdown. |
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