BC556 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

BC556

Amplifier Transistors

Motorola => Freescale 

1.0

0.7

0.5 D = 0.5

0.2

0.3

0.2

0.05

0.1

0.1

0.07

0.05

0.03

0.02

0.01

0.1 0.2

0.5

BC556,B BC557A,B,C BC558B

SINGLE PULSE

SINGLE PULSE

P(pk)

t1

t2

DUTY CYCLE, D = t1/t2

1.0 2.0

5.0 10

20

50 100 200

t, TIME (ms)

Figure 13. Thermal Response

ZθJC(t) = (t) RθJC

RθJC = 83.3°C/W MAX

ZθJA(t) = r(t) RθJA

RθJA = 200°C/W MAX

D CURVES APPLY FOR POWER

PULSE TRAIN SHOWN

READ TIME AT t1

TJ(pk) – TC = P(pk) RθJC(t)

500 1.0 k 2.0 k

5.0 k 10 k

–200

1s

3 ms

–100

–50

TA = 25°C TJ = 25°C

BC558

–10

BC557

BC556

–5.0

–2.0

–1.0

BONDING WIRE LIMIT

THERMAL LIMIT

SECOND BREAKDOWN LIMIT

–5.0 –10

–30 –45 –65 –100

VCE, COLLECTOR–EMITTER VOLTAGE (V)

Figure 14. Active Region — Safe Operating Area

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.

Motorola Small–Signal Transistors, FETs and Diodes Device Data

5

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