HA16117F Series
5. tOFF when P-RUN signal 90 kHz
When the P-RUN frequency is high, even though within specification, the CR pin potential
falls. If the P-RUN frequency falls sharply at this time, tOFF may be short.
With values of CF = 0.01 µF and CR = 0.1 µF, the CR pin potential will not fall as long as the
P-RUN frequency is 20 kHz or below.
f
P_RUN ≈ 90 kHz
50 ms
H
P-RUN
L
H
Q
Q
L
H
L
H
A
L
5 V
3.6 V
CF
0.9 V
0 V
H
WD
L
5 V
3.2 V
1.6 V
≈ 2.3 V
CR
0 V
H
B
C
L
H
L
H
RES
tOFF
26 ms
L
12