MB3887 Fujitsu, MB3887 Datasheet - Page 14

• Manufacturer Part Number: MB3887
• Description: DC/DC Converter IC
• Manufacturer: Fujitsu

14
MB3887
Error amplifier gain and phase vs. Frequency
Error amplifier gain and phase vs. Frequency
−20
−40
Current detection amplifier gain and phase vs. Frequency
−20
−40
−20
−40
40
20
40
20
40
20
0
0
0
1 k
1 k
1 k
10 k
10 k
10 k
Frequency f (Hz)
Frequency f (Hz)
Frequency f (Hz)
A
φ
φ
φ
V
100 k
100 k
100 k
A
A
V
V
Ta
1 M
1 M
Ta = +25
1 M
Ta
=
=
+25
+25
°C
°C
°C
10 M
10 M
10 M
180
90
0
−90
−180
180
90
0
−90
−180
180
90
0
−90
−180
12.6 V
IN
IN
10 kΩ
10 kΩ
10 kΩ
10 kΩ
1 µF
1 µF
+
+
2.4 kΩ
2.4 kΩ
10 kΩ
10 kΩ
10 kΩ
12.55 V
(24)
(1)
13
12
10 kΩ
+
−
×20
(Current Amp2)
Current Amp1
4.2 V
(4)
(3)
4.2 V
16
22
8
9
VCC = 19 V
4.2 V
240 kΩ
240 kΩ
−
+
−
+
+
(Error Amp2)
Error Amp1
Error Amp3
(2)
VCC = 19 V
VCC = 19 V
10
OUT
(5)
15
7
(Continued)
OUT
OUT