HA17431 Series
HA17431PJ/PAJ/FPJ/FPAJ/P/PA/UA/UPA/FP/FPA/PNA/PNAJ, HA17432UA/UPA
Oscillation Stability vs. Load Capacitance between Anode and Cathode
1.5
150
Oscillation
region
Stable
region
100
50
0
V
CC
C
L
0.0001
0.001
0.01
0.1
1.0 2.0
Load capacitance CL (µF)
Open Loop Voltage Gain, Phase vs. Frequency Characteristics (1)
(With no feedback capacitance)
60
GV
IK = 10 mA
50
0
40
φ
30
20
10
0
90
220 Ω
15 kΩ
10 µF
Vout
180
Vin
8.2 kΩ GND
10
100
1 k
10 k
100 k
Frequency f (Hz)
Open Loop Voltage Gain, Phase vs. Frequency Characteristics (2)
(When a feedback capacitance (Cf) is provided)
IK = 5 mA
10
Gυ
Gυ
8
5
180
Cf = 0.022 µF
φ
Cf = 0.22 µF
270
360
2 k
Vout
+
Cf
0
200 µF
20 V
2.4 kΩ
–
Vin
GND
50 Ω
–4
10
100
1 k
10 k
Frequency f (Hz)
Rev.1, Sep. 2002, page 11 of 24