TOP412/414

A

4/99

12

Figure 9. TOPSwitch Duty Cycle Measurement.

Figure 11. TOPSwitch General Test Circuit.

120

100

80

40

20

60

0

02

4

6

8

10

CONTROL Pin Voltage (V)

TYPICAL CONTROL PIN I-V CHARACTERISTIC

Latched Shutdown

Trigger Current (45 mA)

1

Slope

Dynamic

Impedance

=

Figure 10. TOPSwitch CONTROL Pin I-V Characteristic.

PI-2212-073098

C1

0.1 µF

C2

47 µF

VS1

0-50 V

VS2

40 V

R1

470 Ω

5 W

S2

S1

R2

470 Ω

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

2. For P package, short all SOURCE and SOURCE (HV RTN) pins together.

D

S

C

CONTROL

TOPSwitch

PI-1215-091794

DRAIN

VOLTAGE

HV

0 V

90%

10%

90%

t2

t1

DC =

t1

t2