MJE5740 MJE5741 MJE5742

3

Motorola Bipolar Power Transistor Device Data

REVERSE BIAS SAFE OPERATING AREA AND INDUCTIVE SWITCHING

RESISTIVE

SWITCHING

OUTPUT WAVEFORMS

NOTE:

PW and VCC Adjusted for Desired IC

RB Adjusted for Desired IB1

PW

DUTY CYCLE

≤ 10%

tr, tf ≤ 10 ns

68

1 k

0.001

µF

0.02

µF

1N4933

270

+ 5 V

1 k

2N2905

47

1/2 W

100

– VBE(off)

MJE200

T.U.T.

IB

RB

1N4933

1N4933

33

33

2N2222

1 k

MJE210

VCC

+ 5 V

L

IC

MR826*

Vclamp

*SELECTED FOR

≥ 1 kV

VCE

5.1 k

51

+VCC

RC

SCOPE

– 4 V

D1

RB

TUT

COIL DATA:

FERROXCUBE CORE #6656

FULL BOBBIN (~16 TURNS) #16

GAP FOR 200

µH/20 A

Lcoil = 200 µH

VCC = 30 V

VCE(pk) = 250 Vdc

IC(pk) = 6 A

VCC = 250 V

D1 = 1N5820 OR EQUIV.

IC

VCE

IC(pk)

t1

tf

t

t

t2

TIME

VCE OR

Vclamp

tf CLAMPED

t1 ADJUSTED TO

OBTAIN IC

t1 ≈

Lcoil (ICpk)

VCC

t2 ≈

Lcoil (ICpk)

Vclamp

TEST EQUIPMENT

SCOPE–TEKTRONICS

475 OR EQUIVALENT

+10 V

25

µs

0

– 9.2 V

tr, tf < 10 ns

DUTY CYCLE = 1%

RB AND RC ADJUSTED

FOR DESIRED IB AND IC

Table 1. Test Conditions for Dynamic Performance

Figure 5. Inductive Switching Measurements

IC, COLLECTOR CURRENT (AMPS)

1

0.2

0.1

1.4

0.8

1.2

10

5

2

1

0.5

0.2

1.6

1.8

0.6

0.4

hFE = 20

+ 25

°C

– 55

°C

+150

°C