MJ10015 MJ10016

5

Motorola Bipolar Power Transistor Device Data

The Safe Operating Area figures shown in Figures 7 and 8 are

specified ratings for these devices under the test conditions

shown.

1.0

Figure 7. Forward Bias Safe Operating Area

VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)

5.0

50

0.005

50

20

2.0

1.0

5.0

0.5

1000

10

100

0

Figure 8. Reverse Bias Switching Safe

Operating Area

VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)

0

200

300

40

20

50

400

TC = 25°C

0.1

200

dc

2.0

20

500

30

10

0.2

0.02

0.01

500

VBE(off) = 5.0 V

TC = 25°C

MJ10015

0.05

10

TURN–OFF LOAD LINE

BOUNDARY FOR MJ10016

THE LOCUS FOR MJ10015

IS 100 V LESS

10

µs

IC

IB1

u 10

BONDING WIRE LIMIT

THERMAL LIMIT (SINGLE PULSE)

SECOND BREAKDOWN LIMIT

MJ10016

100

SAFE OPERATING AREA INFORMATION

FORWARD BIAS

There are two Iimitations on the power handling ability of a

transistor: average junction temperature and second break-

down. 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 dissipa-

tion than the curves indicate.

The data of Figure 7 is based on TC = 25_C; TJ(pk) is

variable depending on power level. Second breakdown pulse

limits are valid for duty cycles to 10% but must be derated

when TC ≥ 25_C. Second breakdown limitations do not der-

ate the same as thermal limitations. Allowable current at the

voltages shown on Figure 7 may be found at any case tem-

perature by using the appropriate curve on Figure 9.

REVERSE BIAS

For inductive loads, high voltage and high current must be

sustained simultaneously during turn–off, in most cases, with

the base to emitter junction reverse biased. Under these

conditions the collector voltage must be held to a safe level

at or below a specific value of collector current. This can be

accomplished by several means such as active clamping,

RC snubbing, load line shaping, etc. The safe level for these

devices is specified as Reverse Bias Safe Operating Area

and represents the voltage–current condition allowable dur-

ing reverse biased turn–off. This rating is verified under

clamped conditions so that the device is never subjected to

an avalanche mode. Figure 8 gives the complete RBSOA

characteristics.

0

Figure 9. Power Derating

TC, CASE TEMPERATURE (°C)

0

40

80

80

40

100

120

160

200

60

20

THERMAL

DERATING

VBE(off), REVERSE BASE VOLTAGE (VOLTS)

1

2

3

4

5

6

10

8

6

5

4

3

2

0

0

SEE TABLE 1 FOR CONDITIONS,

FIGURE 6 FOR WAVESHAPE.

9

7

1

7

8

Figure 10. Typical Reverse Base Current

versus VBE(off) With No External Base

Resistance

IC = 20 A

FORWARD BIAS

SECOND BREAKDOWN

DERATING