4

FP0100

Supertex inc.

1235 Bordeaux Drive, Sunnyvale, CA 94089

Tel: 408-222-8888

www.supertex.com

Figure 4. Higher Input Voltage Application

Figure 5. Short Circuit Test Performance

The FP0100 has a typical response time of less than 30ns.

The short circuit test set-up is shown in Figure 5. The output

is at 60V prior to a short. A 10Ω resistor is used to measure

the current going into the FP0100. A 220nF ceramic capaci-

tor is added on the input to supply any transient currents that

might occur. The waveform is shown in Figure 6. Channel 1

is the output voltage which is discharged to 0V. Channel 2 is

the voltage across the 10Ω resistor. The input current peaks

to 400mA then decays quickly within 20ns.

10

FP0100

+

60V

-

VIN

VOUT

RSEN

Short to

Ground

V

OUT

220nF

I

IN

FP0100

VIN

VOUT

RSEN

R

SEN

Input

0 to 450V

DN3545

±7.5V

150k

+

7.5V

-

Output