TIP35A TIP35B TIP35C TIP36A TIP36B TIP36C

3

Motorola Bipolar Power Transistor Device Data

0.5

1.0

2.0

7.0

0.3

3.0

5.0

0.7

IC, COLLECTOR CURRENT (AMPERES)

Figure 4. Turn–Off Time

10

7.0

5.0

3.0

2.0

1.0

0.7

0.5

0.3

0.2

0.1

10

20

30

TJ = 25°C

VCC = 30 V

IC/IB = 10

IB1 = IB2

ts

tf

(PNP)

(NPN)

ts

tf

IC, COLLECTOR CURRENT (AMPS)

Figure 5. DC Current Gain

200

500

0.2

0.5

2.0

100

0.1

100

50

20

10

1.0

VCE = 4.0 V

TJ = 25°C

5.0

10

20

5.0

50

PNP

NPN

1000

2.0

1.0

FORWARD BIAS

There are two limitations 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 6 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 w 25_C. Second breakdown limitations do not der-

ate the same as thermal limitations.

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 conditions during re-

verse biased turn–off. This rating is verified under clamped

conditions so that the device is never subjected to an ava-

lanche mode. Figure 7 gives RBSOA characteristics.

VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)

7.0

20

1.0

50

100

0.2

0

0.5

SECONDARY BREAKDOWN

THERMAL LIMIT

BONDING WIRE LIMIT

1.0 ms

dc

300

µs

2.0

1.0

100

30

10 ms

Figure 6. Maximum Rated Forward Bias

Safe Operating Area

50

20

10

5.0

0.3

2.0

3.0

5.0

10

30

70

TC = 25°C

TIP35A, 36A

TIP35B, 36B

TIP35C, 36C

VCE, COLLECTOR–EMITTER VOLTAGE (VOLTS)

40

60

0

80

100

5.0

0

15

20

40

30

Figure 7. Maximum Rated Forward Bias

Safe Operating Area

25

10

10

20

30

50

70

90

TJ ≤ 100°C

TIP35A

TIP36A

TIP35B

TIP36B

TIP35C

TIP36C