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

MB3883
s BLOCK DIAGRAM
FB1 35
−IN1 34
DTC1 36
FB2 32
−IN2 31
DTC2 33
FB3 29
−IN3 28
DTC3 30
−IN (A) 4 9
OUT (A) 4 10
FB4 11
−IN4 12
−IN (S) 4 13
DTC4 14
FB5 7
−IN5 8
DTC5 6
Error
Amp.1
−
+
+
1.25 V
SCP
− Comp.1
+
+
1.0 V
Error
− ^Amp.2
+
+
1.25 VSCP
− Comp.2
+
+
1.0 V
Error
− ^Amp.3
+
+
1.25 VSCP
− Comp.3
+
+
1.0 V
PWM
Comp.
+ ^1-1
+
−
PWM
VB1
Comp.
1-2
+
−
PWM
Comp.
2-1
+
+
−
PWM
VB1
Comp.
2-2
+
−
PWM
Comp.3
+
+
−
INV
Amp.4
−
+
Error
− ^Amp.4
+
+
1.25 VSCP
− Comp.4
+
+
1.0 V
Error
− ^Amp.5
+
+
1.25 VSCP
− Comp.5
+
+
1.0 V
PWM
Comp.4
+
+
−
PWM
Comp.
5-1
+
+
−
PWM
Comp.
VB1 5-2
+
−
CH1
Drive
1-1
42 VCC (O)
37 OUT1-1
Drive
1-2
38 OUT1-2
CH2
Drive
2-1
39 OUT2-1
Drive
2-2
40 OUT2-2
CH3
Drive
3
41 OUT3
CH4
Drive
4
43 OUT4
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
1.8 V− ^CT1
1.1 V−
1.8 V− ^CT2
1.1 V−
0.8 V− ^CT
CS CTL 0.3 V−
Logic
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
2.49 V
16 17
VREF GND
20 CTL
H : ON (Power/CH6)
L : OFF (Standby mode)
(48 Pin)
6