MB3778 Datasheet, PDF (21/29 Pages) Fujitsu Component Limited. – Switching Regulator Controller

MB3778
(Continued)
Frequency vs. Gain/Phase
40
20
0
−20
−40
10
CNF = OPEN
AV
180
90
0
φ
−90
100
1k
10 k
Frequency f (Hz)
100 k
−180
1M
Frequency vs. Gain/Phase
(Actual Data)
40
AV
20
CNF = 0.047 µF
180
90
0
0
φ
−20
−90
−40
10
−180
100
1k
10 k 100 k 1 M
Frequency f (Hz)
Frequency vs. Gain/Phase
(Actual Data)
CNF = 470 pF
40
180
20
AV
90
0
0
−20
φ
−90
−40
10
100
1k
10 k 100 k
Frequency f (Hz)
Actual Circuit
VREF VREF
CNF
−180
1M
40
20
0
−20
−40
10
Frequency vs. Gain/Phase
(Actual Data)
CNF = 4700 pF
180
AV
90
0
φ
−90
−180
100
1k
10 k 100 k 1 M
Frequency f (Hz)
4.7 kΩ
4.7 kΩ
10 µF
IN
−+
4.7 kΩ
4.7 kΩ
240 kΩ
−
+
Error Amp.
OUT
21