TIP121 datasheet(5/7 Pages) ONSEMI

5 / 7 page

TIP120, TIP121, TIP122 (NPN); TIP125, TIP126, TIP127 (PNP)

www.onsemi.com

1.0

Figure 6. Active−Region Safe Operating Area

VCE, COLLECTOR-EMITTER VOLTAGE (VOLTS)

5.0

2.0

1.0

0.02

2.0

5.0

100

BONDING WIRE LIMITED

THERMALLY LIMITED

@ TC = 25°C (SINGLE PULSE)

0.5

TJ = 150°C

1ms

100

0.2

0.1

0.05

SECOND BREAKDOWN LIMITED

CURVES APPLY BELOW

RATED VCEO

5ms

3.0

7.0

TIP120, TIP125

TIP121, TIP126

TIP122, TIP127

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 6 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 5.

At high case temperatures, thermal limitations will reduce

the power that can be handled to values less than the

limitations imposed by second breakdown

300

0.1

VR, REVERSE VOLTAGE (VOLTS)

2.0

5.0

100

0.2

0.5

1.0

100

TJ = 25°C

Cib

Cob

PNP

NPN

Figure 7. Small−Signal Current Gain

10,000

1.0

f, FREQUENCY (kHz)

100

200

1000

2.0

5.0

3000

500

100

TC = 25°C

VCE = 4.0 Vdc

IC = 3.0 Adc

1000

PNP

NPN

Figure 8. Capacitance

500

5000

2000

300

200

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