MB3874 Datasheet, PDF (14/28 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Parallel Charging

MB3874/MB3876
(Continued)
Error amplifier gain and phase vs. frequency
Ta = +25 °C
40
AV
180
φ
20
90
0
0
−20
−90
−40
−180
100 1 k 10 k 100 k 1 M 10 M
4.2 V
VCC = 16 V (MB3874)
VCC = 19 V (MB3876)
240 kΩ
IN ^{1 µF}
−+
10 kΩ
2.4 kΩ
3−
(10)
OUT
2
10 kΩ ^{4 +}
(11)
(9)
2.088 V ^{Error Amp.2}
(Error Amp.3)
Frequency f (Hz)
Current detection amplifier gain and phase vs. frequency
Ta = +25 °C
40
180
AV
20
90
0
φ
0
−20
−90
−40
−180
100
1k
10 k
100 k
1M
Frequency f (Hz)
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)
VCC = 16 V (MB3874)
VCC = 19 V (MB3876)
IN
0.1 V
∗
24
+
100 kΩ
(13)
× 25
1
−
3 OUT
(10)
(12)
Current Amp.1
(Current Amp.2)
∗ : MB3874 12.6 V
MB3876 16.8 V
14