E

7/96

14

TOP100-4

PI-1215-091794

DRAIN

VOLTAGE

HV

0 V

90%

10%

90%

t2

t1

DC =

t1

t2

Figure 12. TOPSwitch Duty Cycle Measurement.

PI-1905-061396

C1

0.1

µF

C2

47

µF

VS1

0-50 V

VS2

40 V

TOPSwitch

R1

470

Ω

5 W

S2

S1

R2

470

Ω

DRAIN

SOURCE

CONTROL

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

Figure 14. 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 13. TOPSwitch CONTROL Pin I-V Characteristic.