FP0100 Datasheet, PDF (4/6 Pages) Supertex, Inc – Fault Protection Switch with Current Fold-back

Figure 4. Higher Input Voltage Application
Input
0 to 450V
DN3545
FP0100
±7.5V
150kΩ
+
7.5V
-
VIN
RSEN
FP0100
VOUT
R_SEN
Output
Figure 5. Short Circuit Test Performance
I_IN
VIN
RSEN
10Ω
+
220nF
FP0100
60V
VOUT
-
Short to
Ground
V_OUT
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.
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: [phone] ● www.supertex.com
4