Datasheet BC556B, BC557A, BC557B, BC557C, BC558B (ON Semiconductor) - 5

BC556B, BC557A, B, C, BC558B
1.0 0.7 D = 0.5 0.5 0.2 0.3 0.2 THERMAL 0.05 SINGLE PULSE 0.1 ZqJC(t) = (t) RqJC 0.1 RqJC = 83.3°C/W MAX P(pk) Z 0.07 SINGLE PULSE qJA(t) = r(t) RqJA ANCE (NORMALIZED) R 0.05 qJA = 200°C/W MAX t1 D CURVES APPLY FOR POWER r(t), TRANSIENT t RESIST 0.03 PULSE TRAIN SHOWN 2 0.02 READ TIME AT t1 DUTY CYCLE, D = t1/t2 TJ(pk) − TC = P(pk) RqJC(t) 0.01 0.1 0.2 0.5 1.0 2.0 5.0 10 20 50 100 200 500 1.0k 2.0k 5.0k 10 t, TIME (ms)
Figure 13. Thermal Response
−200 1 s 3 ms −100 The safe operating area curves indicate I (mA) C−VCE limits of the T transistor that must be observed for reliable operation. Collector −50 A = 25°C TJ = 25°C 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 OR CURRENT BC558 variable depending upon conditions. Pulse curves are valid for BC557 −10 duty cycles to 10% provided TJ(pk) ≤ 150°C. TJ(pk) may be BC556 calculated from the data in Figure 13. At high case or ambient , COLLECT −5.0 temperatures, thermal limitations will reduce the power than can I C BONDING WIRE LIMIT be handled to values less than the limitations imposed by second THERMAL LIMIT breakdown. SECOND BREAKDOWN LIMIT −2.0 −1.0 −5.0 −10 −30 −45 −65 −100 VCE, COLLECTOR−EMITTER VOLTAGE (V)
Figure 14. Active Region − Safe Operating Area http://onsemi.com 5