MB3883 Datasheet, PDF (8/39 Pages) Fujitsu Component Limited. – 6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down

MB3883
• Block diagram (Expansion 2/2)
FB5 7
−IN5 8
DTC5 6
Error
− ^Amp.5
+
+
1.25 VSCP
− Comp.5
+
+
1.0 V
PWM
Comp.
5-1
+
+
−
PWM
Comp.
VB1 5-2
+
−
CH5
Drive
5-1
45 OUT5-1
Drive
5-2
46 OUT5-2
FB6 3
−IN6
(VB : 2 V) Error
Amp.6
4
−
37.5 kΩ ₊
62.5 kΩ
1.26 V
C+IN6 5
SCP
Comp.6
+
−
0.9 V
(VB : 2 V)
63 kΩ
PWM
Comp.6
+
0.74 V
+
−
37 kΩ
Power
Comp.
+
−
0.9V
CH6
Drive
6
47 OUT6
48 RB6
CTL1, 2 21
CTL3 22
CTL4 23
CS CTL
Logic
1.8 V− ^CT1
1.1 V−
1.8 V− ^CT2
1.1 V−
0.8 V− ^CT
0.3 V−
CTL5 24
OSC
2V
15
27 25 26
CS
VB RT CT
UVLO
SCP
18
CSCP
SW
Drive
1 SWOUT
44 GND (O)
2 SWIN
19 VCC
Power
Ref ON/OFF
CTL
20 CTL _{H : ON (Power/CH6)}
2.49 V
16 17
L : OFF (Standby mode)
VREF GND
(48 Pin)
8