MB39A123 Datasheet, PDF (20/44 Pages) Fujitsu Component Limited. – 6 ch DC/DC Converter IC with Synchronous Rectification

MB39A123
■ SETTING THE OUTPUT VOLTAGE
• ch.1
Vo
R3
R1
38
−INE1
R2
CS1
39
Error
Amp
−
+
+
1.00 V
37
FB1
1.00 V
VO =
(R1 + R2)
R2
(R1 + R3) ≥
VO
100 µA
Set R1 and R3 to prevent the error amp’s response from decreasing by using above formula.
• ch.2 to ch.6
Vo
R3
R1
−INEX
R2
CSX
Error
Amp
−
+
+
1.23 V
1.23 V
FBX
VO = _R2 (R1 + R2)
(R1 + R3) ≥ ^VO
100 µA
X : Each channel number
Set R1 and R3 to prevent the error amp’s response from decreasing by using above formula.
20