MB3887 Datasheet, PDF (14/33 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion battery

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