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BUS98 BUS98A

Motorola Bipolar Power Transistor Device Data

IC(pk)

VCE or

Table 1. Test Conditions for Dynamic Performance

VCEO(sus)

RBSOA AND INDUCTIVE SWITCHING

RESISTIVE SWITCHING

PW Varied to Attain

IC = 100 mA

Lcoil = 25 mH, VCC = 10 V

Rcoil = 0.7 Ω

Lcoil = 180 µH

Rcoil = 0.05 Ω

VCC = 20 V

VCC = 250 V

Pulse Width = 10

µs

INPUT

Rcoil

Lcoil

VCC

Vclamp

1N4937

EQUIVALENT

TUT

INDUCTIVE TEST CIRCUIT

TURN–ON TIME

IB1 adjusted to

obtain the forced

hFE desired

TURN–OFF TIME

Use inductive switching

driver as the input to

the resistive test circuit.

t1 Adjusted to

Obtain IC

t1 [

Lcoil (IC(pk))

VCC

t2 [

Lcoil (IC(pk))

Vclamp

Test Equipment

Scope — Tektronix

475 or Equivalent

RESISTIVE TEST CIRCUIT

VCE

tf Clamped

TIME

TUT

VCC

OUTPUT WAVEFORMS

SEE ABOVE FOR

DETAILED CONDITIONS

IB1

Vclamp

Vclamp = 250 V

+10 V

–10 V

MJE200

MJE210

BUV20

µF

0.1

µF

– VC1

ADJUST VC1

TO OBTAIN

DESIRED IB1

ADJUST VC2

TO OBTAIN

DESIRED IB2

tfi

trv

Figure 7. Inductive Switching Measurements

TIME

Figure 8. Peak–Reverse Current

VBE(off), BASE–EMITTER VOLTAGE (VOLTS)

90% IB1

IC pk

VCE(pk)

90% VCE(pk)

90% IC(pk)

10% VCE(pk)

10%

IC pk

2% IC

βf = 5

IC = 20 A

tsv

tti

VCE

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