TIP120 datasheet(2/4 Pages) RECTRON

2 / 4 page

RATING AND CHARACTERISTICS CURVES (TIP120)

Figure4 CAPACITANCE

Figure1 THERMAL RESISTANCE

There are two limitations on the power handing ability of a tran-

sistor average junction temperature and second breakdown.Safe

operating aresa curves indicate IC-VCE limits of the transistor th-

at 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 2 is based on TJ(pk)=150OC,TC is variable d-

epending on conditions. Second breakdown pulse limit are valid

for duty cycles to 10% provided TJ(pk)<150OC.TJ(pk) may be calc-

ulated from the data in Figure 1. At high case temperatures, ther-

mal limitations will reduce the power that can be handled to valu-

es less than the limitations imposed by second breakdown.

Figure3 Small-Signal Current Gain

f, FREQUENCY, (KHz)

VR, REVERSE VOLTAGE, (V)

0.01

0.02

0.05

0.3

0.5

0.7

1.0

0.1

0.2

0.5

1.0 2.0

5.0

Figure2 ACTIVE-REGION SAFE OPERATING AREA

VCE, COLLECTOR-EMITTER VOLTAGE, (V)

t, TIME, (mS)

1.0

2.0 3.0

5.0 7.0 10

70 100

1.0

2.0

5.0 10 20

50 100 200

500 1K

0.1

0.2

0.5 1.0 2.0

5.0

10 20

50 100

0.2

0.1

0.07

0.05

0.03

0.02

0.01

0.02

0.05

0.1

0.2

0.5

1.0

2.0

5.0

100 200

500

1000

100

200

300

500

10K

100

200

300

ZqJC = r(t) RqJC

RqJC= 1.92OC/W MAX.

D CURVES APPLY FOR POWER

PULSE TRAIN SHOWN

READ TIME AT t1

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

P(pk)

DUTY CYCLE, D =t1/t2

500uS

1mS

5mS

100uS

TJ=150OC

BONDING WIRE LIMITED

THERMALLY LIMITED

@TC=25OC(SINGLE PULSE)

SECOND BREAKDOWN LIMITED

CURVE APPLY BELOW

RATED VCEO

TC= 25

VCE= 40 Vdc

IC= 3.0 Adc

Cob

Cjb

TJ= 25

SINGLE PULSE

D =0.01

D =0.02

D =0.05

D =0.1

D =0.2

D =0.5

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