Rev. B 03/10

29

TOP264-271

www.powerint.com

Figure 30. Duty Cycle Measurement.

Figure 31. CONTROL Pin I-V Characteristic.

Figure 32. Drain Current Operating Envelope.

Figure 33. TOPSwitch-JX General Test Circuit.

PI-2039-033001

DRAIN

VOLTAGE

HV

0 V

90%

10%

90%

t2

t1

D =

t1

t2

120

100

80

40

20

60

0

5

6

7

8

9

CONTROL Pin Voltage (V)

1

Slope

Dynamic

Impedance

=

PI-5534-072409

5-50 V

S4

40 V

0.1

µF

47

µF

470

Ω

5 W

(X and V Pins)

470

Ω

0-300 k

Ω

0-60 k

Ω

NOTES: 1. This test circuit is not applicable for current limit or output characteristic measurements.

D

S

F

X

C

V

C

CONTROL

S1

S3

0-15 V

S2

0.8

1.3

1.2

1.1

0.9

0.8

1.0

0

0

1

2

6

8

3

Time (

µs)

4

5

7

0.7

0.6

0.5

0.4

0.3

0.2

0.1

IINIT(MIN)

tLEB (Blanking Time)