Communication-concepts MJE243 Manual de usuario descargar pdf (Pagina 4)

MJE243 − NPN, MJE253 − PNP

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, COLLECTOR-EMITTER VOLTAGE (VOLTS)

0.1

0.01

0.05

Figure 5. Active Region Safe Operating Area

500ms

5.0

20107.05.03.02.01.0

100ms

= 150°C

, COLLECTOR CURRENT (AMP)

0.2

0.5

1.0

2.0

0.02

1.0ms

1007050

5.0ms

BONDING WIRE LIMITED

THERMALLY LIMITED @

= 25°C (SINGLE PULSE)

SECOND BREAKDOWN LIMITED

CURVES APPLY BELOW

RATED V

CEO

MJE243/MJE253

There are two limitations on the power handling ability of

a transistor: average junction temperature and second

breakdown. Safe operating area curves indicate I

− V

limits of the transistor that must be observed for reliable

operation; i.e., the transistor must not be subjected to greater

dissipation than the curves indicate.

The data of Figure 5 is based on T

J(pk)

= 150_C; T

variable depending on conditions. Second breakdown pulse

limits are valid for duty cycles to 10% provided T

J(pk)

v 150_C. T

J(pk)

may be calculated from the data in

Figure 4. At high case temperatures, thermal limitations will

reduce the power that can be handled to values less than the

limitations imposed by second breakdown.

10K

, COLLECTOR CURRENT (AMPS)

500

300

200

100

Figure 6. Turn−Off Time

t, TIME (ns)

0.01 0.03 0.05 0.50.2

0.02

0.1 0.3 105213

= 30 V

= 10

= I

= 25°C

, REVERSE VOLTAGE (VOLTS)

100

200

Figure 7. Capacitance

5020107.05.03.01.0

C, CAPACITANCE (pF)

2.0

= 25°C

MJE243 (NPN)

MJE253 (PNP)

NPN MJE243

PNP MJE253

7030

1 2 3 4 5 6

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