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MB3881PFF Datasheet(PDF) 4 Page - fujitsu semiconductor

Part # MB3881PFF
Description  8-ch DC/DC Converter IC with Synchronous Rectifier for Voltage Step-up and Step-down
PDF  40 Pages
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Manufacturer  FUJITSU [fujitsu semiconductor]
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Logo FUJITSU - fujitsu semiconductor

MB3881PFF Datasheet(HTML) 4 Page - fujitsu semiconductor

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MB3881
4
(Continued)
Pin No.
Symbol
I/O
Descriptions
CH8
4
FB8
O
Error amplifier output pin.
5
−IN8
I
Error amplifier inverted input pin.
6
+IN8
I
Error amplifier non-inverted input pin.
7
−IN8 (C)
I
Short detection comparator inverted input pin.
8
+IN8 (C)
I
Short detection comparator non-inverted input pin.
3
DTC8
I
Dead time control pin.
2RB8
Output current setting pin.
64
OUT8
O
Output pin.
OSC
33
RT
Triangular wave frquency setting resistor connection pin.
34
CT
Triangular wave frquency setting capacitor connection pin
35
SYNC
I
External synchronous signal input pin.
Control
28
CTL-1
I
Power supply, CH 1, 3, 4, 8 control circuit.
“H” level : Power supply operating mode
“L”level : Standby mode
29
CTL-2
I
CH 2 control circuit.
•CTL-1pin = “H” level
“H” level : CH2 operating mode
“L” level : CH2 OFF mode
30
CTL-3
I
CH5, 6 control circuit.
•CTL-1pin = “H” level
“H” level : CH5, CH6 operating mode
“L” level : CH5, CH6 OFF mode
31
CTL-4
I
CH7 control circuit.
•CTL-1pin = “H” level
“H” level : CH7 operating mode
“L” level : CH7 OFF mode
26
CSCP
Short protection circuit capacitor connection pin.
32
CS
CH1, 2, 3, 4, 7 soft start circuit capacitor connection pin.
Power
27
VCC
Reference voltage and control circuit power supply pin.
58
VCC (O) -1
CH1, 2, 3, 4 output circuit power supply pin.
59
VCC (O) -2
CH5, 6, 7, 8 output circuit power supply pin.
49
VSS (O) -1
CH1, 2, 3, 4 output circuit power supply pin.
63
VSS (O) -2
CH5, 6, 7 output circuit power supply pin.
52
VDD (O)
CH1, 2 synchronous rectifier side output circuit power supply pin.
24
VREF
O
Refernce voltage output pin.
36
VB
O
Triangular wave oscillator regulator output pin.
25
GND
Ground pin.
55
GND (O) -1
CH1, 2, 3, 4 output circuit ground pin.
1
GND (O) -2
CH5, 6, 7, 8 output circuit ground pin.



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