MB3883 Datasheet, PDF (23/39 Pages) Fujitsu Component Limited. – 6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down

MB3883
s SETTING THE OUTPUT VOLTAGE
• CH1 to CH3, CH5
VO
FB1
35
R1
34
−IN1
R2
Error
Amp.1
−
+
+
1.25 V
VO =
1.25 V
R2
(R1 + R2 )
SCP
− ^Comp.1
+
+
1.0 V
• CH4
VO
R1
−IN (A) 4
9
R2
OUT (A) 4
10
R3
FB4 11
12
−IN4
INV
Amp.4
−
+
VO = ^{V−IN (A) 4 − VOUT (A) 4} R1
R2
[ ] VOUT (A) 4 = V−IN4
Error
Amp.4
−
+
+
1.25 V
23