HA16117F Series
P-RUN Input Frequency vs. K (Tadj constant)
1 M
Ta = 25°C
R2
K=
R1
R2
R1 + R2
5 V
100 k
10 k
VCC
Tadj
Pulse
generator
P-RUN ACC
CF
CR
GND
RES
5V
0V
duty 50%
1 k
MPU system normal
0.01 µ
0.1 µ
Oscilloscope
100
10
R2
K =
R1 + R2
Test circuit
Notes: 1. Normal detection is assumed when RES is not output.
2. The figure at left is for a constant P-RUN frequency.
MPU system abnormal
1
0.55 0.6
0.7
0.8
Tadj constant K
P-RUN High Threshold Frequency vs. CF Capacitance
10 M
Ta = 25°C
510 k
750 k
VCC
Tadj
5 V
P-RUN ACC
MPU system abnormal
1 M
CF
CR
GND
RES
Pulse
generator
CF
CR
Oscilloscope
100 k
0 V to 5 V duty 50%
Test circuit
MPU system normal
Notes: 1. Normal detection is assumed when RES is not output.
2. The figure at left is for a constant P-RUN frequency.
10 k
500 p 1000 p
0.01 µ 0.03 µ
External capacitance CF (F)
27
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