MB3878 Datasheet, PDF (11/24 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging

MB3878
(Continued)
Error amplifier gain and phase vs. frequency
Ta = +25 °C
40
AV
180
20
φ
90
0
0
−20
−90
−40
−180
1k
10 k 100 k
1M
10 M
Frequency f (Hz)
Current detection amplifier gain and phase
vs. frequency
φ
Ta = +25 °C
40
180
5.2 V
VCC = 19 V
240 kΩ
IN ^{1 µF}
−+
10 kΩ
2.4 kΩ
10 kΩ
8−
(4)
OUT
7
9+
(5)
(3)
2.5 V ^{Error Amp.1}
(Error Amp.2)
20
AV
90
VCC = 19 V
0
0
−20
−90
−40
1k
10 k
100 k
1M
Frequency f (Hz)
−180
10 M
12.6 V
13 +
(24) ×25
OUT
10
12 −
(2)
(1)
12.55 V ^{Current Amp.1}
(Current Amp.2)
Power dissipation vs. ambient temperature
800
740
700
600
500
400
300
200
100
0
−40 −20 0 20 40 60 80 100
Ambient temperature Ta ( °C)
11