TIP121 datasheet(4/7 Pages) ONSEMI

4 / 7 page

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

www.onsemi.com

Figure 3. Switching Times Test Circuit

5.0

0.1

Figure 4. Switching Times

IC, COLLECTOR CURRENT (AMP)

2.0

1.0

0.5

0.05

0.2

0.3

0.5 0.7 1.0

2.0

3.0

0.3

0.7

PNP

NPN

td @ VBE(off) = 0

approx

+8.0 V

approx

-12 V

tr, tf ≤ 10 ns

DUTY CYCLE = 1.0%

+4.0 V

VCC

-30 V

TUT

≈ 8.0 k ≈ 120

SCOPE

for td and tr, D1 is disconnected

and V2 = 0

For NPN test circuit reverse all polarities.

RB & RC VARIED TO OBTAIN DESIRED CURRENT LEVELS

D1 MUST BE FAST RECOVERY TYPE, eg:

1N5825 USED ABOVE IB ≈ 100 mA

MSD6100 USED BELOW IB ≈ 100 mA

VCC = 30 V

IC/IB = 250

IB1 = IB2

TJ = 25°C

3.0

0.2

0.1

0.07

5.0 7.0

Figure 5. Thermal Response

t, TIME (ms)

1.0

0.01

0.5

0.2

0.1

0.05

0.02

0.05

0.1

0.2

0.5

1.0

2.0

5.0

100

200

1.0 k

500

ZqJC(t) = r(t) RqJC

RqJC = 1.92°C/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

D = 0.5

0.2

0.05

0.02

0.01

SINGLE PULSE

0.1

0.7

0.3

0.07

0.03

0.02

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