MJD122 datasheet(6/8 Pages) ONSEMI

6 / 8 page

MJD122, NJVMJD122 (NPN), MJD127, NJVMJD127 (PNP)

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t, TIME OR PULSE WIDTH (ms)

0.01

1000

0.3

0.2

0.07

RqJC(t) = r(t) RqJC

RqJC = 6.25°C/W

D CURVES APPLY FOR POWER

PULSE TRAIN SHOWN

READ TIME AT t1

TJ(pk) - TC = P(pk) qJC(t)

P(pk)

DUTY CYCLE, D = t1/t2

0.01

0.7

0.5

0.1

0.05

0.03

0.02

0.02 0.03

0.05

0.1

0.2 0.3

0.5

100

200 300

500

0.2

SINGLE PULSE

D = 0.5

0.05

0.1

0.5

0.3

0.2

0.7

IC, COLLECTOR CURRENT (AMP)

VCC = 30 V

IC/IB = 250

IB1 = IB2

TJ = 25°C

0.7

0.5

0.3

0.2

td @ VBE(off) = 0 V

PNP

NPN

Figure 9. Switching Times Test Circuit

Figure 10. Switching Times

0.1

Figure 11. Thermal Response

APPROX

+8 V

≈ 8 k

SCOPE

VCC

-30 V

FOR td AND tr, D1 IS DISCONNECTED

AND V2 = 0

FOR NPN TEST CIRCUIT REVERSE ALL POLARITIES.

tr, tf ≤ 10 ns

DUTY CYCLE = 1%

+ 4 V

RB & RC VARIED TO OBTAIN DESIRED CURRENT LEVELS

D1, MUST BE FAST RECOVERY TYPE, e.g.:

1N5825 USED ABOVE IB ≈ 100 mA

MSD6100 USED BELOW IB ≈ 100 mA

APPROX

-12 V

TUT

≈ 120

0.07

0.05

0.1

0.01

VCE, COLLECTOR-EMITTER VOLTAGE (VOLTS)

0.3

100

0.5

0.2

BONDING WIRE LIMIT

THERMAL LIMIT

TC = 25°C (SINGLE PULSE)

SECOND BREAKDOWN LIMIT

TJ = 150°C

100

1ms

0.1

CURVES APPLY BELOW RATED VCEO

5ms

Figure 12. Maximum Forward Bias

Safe Operating rea

0.05

0.02

0.03

500

There are two limitations on the power handling ability of

a transistor: average junction temperature and second

breakdown. Safe operating area curves indicate IC − VCE

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 12 is based on TJ(pk) = 150

_C; TC is

variable depending on conditions. Second breakdown pulse

limits are valid for duty cycles to 10% provided TJ(pk)

< 150

_C. TJ(pk) may be calculated from the data in

Figure 11. At high case temperatures, thermal limitations

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

the limitations imposed by second breakdown.

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