FA7703 Datasheet, PDF (10/21 Pages) Fuji Electric – FUJI Power Supply Control IC

FA7703/04
FA7703/7704
100
90
80
70
60
50
40
30
20
10
0
0.5
FB terminal voltage vs.Duty cycle
FA7703/04:OUT1 Nch driven (SEL1=REG)
FA7704:OUT2
fosc=1MHz
fosc=190kHz
0.6
0.7
0.8
0.9
1.0
1.1
1.2
FB terminal voltage [V]
100
90
80
70
60
50
40
30
20
10
0
0.5
DT terminal voltage vs.Duty cycle
FA7703/04:OUT1 Nch driven (SEL1=REG)
FA7704:OUT2
fosc=190kHz
0.6
0.7
0.8
0.9
1.0
DT terminal voltage [V]
fosc=1MHz
1.1
1.2
100
90
80
70
60
50
40
30
20
10
0
0.5
CS terminal voltage vs.Duty cycle
FA7703/04:OUT1 Nch driven (SEL1=REG)
FA7704:OUT2
fosc=1MHz
fosc=190kHz
0.6
0.7
0.8
0.9
1.0
1.1
1.2
CS terminal voltage [V]
100
90
80
70
60
50
40
30
20
10
0
0.5
FB terminal voltage vs.Duty cycle
FA7703/04:OUT1 Pch driven (SEL1=GND)
FA7703:OUT2
fosc=1MHz
fosc=190kHz
0.6
0.7
0.8
0.9
1.0
1.1
1.2
FB terminal voltage [V]
100
90
80
70
60
50
40
30
20
10
0
0.5
DT terminal voltage vs.Duty cycle
FA7703/04:OUT1 Pch driven (SEL1=GND)
FA7703:OUT2
fosc=1MHz
fosc=190kHz
0.6
0.7
0.8
0.9
1.0
1.1
1.2
DT terminal voltage [V]
100
90
80
70
60
50
40
30
20
10
0
0.5
CS terminal voltage vs.Duty cycle
FA7703/04:OUT1 Pch drivenb (SEL1=GND)
FA7703:OUT2
fosc=1MHz
fosc=190kHz
0.6
0.7
0.8
0.9
1.0
1.1
1.2
CS terminal voltage [V]
Fuji Electric Systems Co., Ltd.
AN-057E Rev.1.0
Jun-2010
10
http://www.fujielectric.co.jp/fdt/scd/