Communication-concepts MJE243 Manual do Utilizador descarregar pdf (Página 3)

MJE243 − NPN, MJE253 − PNP

http://onsemi.com

3

16

20

Figure 1. Power Derating

T, TEMPERATURE (°C)

0

40 60 100 120 160

12

P

D

, POWER DISSIPATION (WATTS)

1.6

0

1.2

8.0 0.8

4.0

0.4

80 140

T

C

P

D

, POWER DISSIPATION (WATTS)

T

A

Figure 2. Switching Time Test Circuit

+11 V

25 ms

0

-9.0 V

R

B

-4 V

D

1

SCOPE

V

CC

+30 V

R

C

t

r

, t

f

≤ 10 ns

DUTY CYCLE = 1.0%

51

R

B

and R

C

VARIED TO OBTAIN DESIRED CURRENT LEVELS

D

1

MUST BE FAST RECOVERY TYPE, e.g.:

1N5825 USED ABOVE I

B

≈ 100 mA

MSD6100 USED BELOW I

B

≈ 100 mA

FOR PNP TEST CIRCUIT, REVERSE ALL POLARITIES

1K

I

C

, COLLECTOR CURRENT (AMPS)

V

CC

= 30 V

I

C

/I

B

= 10

T

J

= 25°C

t, TIME (ns)

500

300

200

100

50

t

d

30

20

10

5

1

0.01 0.03 0.05 0.50.20.1 0.3 10

Figure 3. Turn−On Time

3

2

5213

t

r

NPN MJE243

PNP MJE253

0.02

t, TIME (ms)

0.01

0.02 0.05 1.0 2.0 5.0 10 20 50 100 2000.1 0.50.2

1.0

0.2

0.1

0.05

r(t), TRANSIENT THERMAL RESISTANCE

q

JC

(t) = r(t) q

JC

q

JC

= 8.34°C/W MAX

D CURVES APPLY FOR POWER

PULSE TRAIN SHOWN

READ TIME AT t

1

T

J(pk)

- T

C

= P

(pk)

q

JC

(t)

P

(pk)

t

1

t

2

DUTY CYCLE, D = t

1

/t

2

0.2

0 (SINGLE PULSE)

(NORMALIZED)

Figure 4. Thermal Response

0.5

D = 0.5

0.05

0.3

0.7

0.07

0.03

0.02

0.1

0.02

0.01

1 2 3 4 5 6

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