MB3785A_03 Datasheet, PDF (3/30 Pages) Fujitsu Component Limited. – Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities)

MB3785A
s PIN DESCRIPTION
Pin No.
1
Symbol
Ca1
48
Cb1
7 +IN1(E)
6 –IN1(E)
CH1 ₅
FB1
8 –IN1(C)
4
DTC1
47
VE1
46 OUT1
3
Ca2
2
Cb2
12 +IN2(E)
11 –IN2(E)
CH2 ₁₀
FB2
13 –IN2(C)
9
DTC2
43
VE2
44 OUT2
34
Ca3
35
Cb3
25 +IN3(E)
26 –IN3(E)
CH3 ₂₇
FB3
24 –IN3(C)
28 DTC3
41
VE3
40 OUT3
36
Ca4
37
Cb4
CH4 ^{30 +IN4(E)}
31 –IN4(E)
32
FB4
29 –IN4(C)
I/O
Description
— CH1 output transistor OFF-current setting terminal. Insert a capacitor be-
tween the Ca1 and the Cb1 terminals, then set the output transistor OFF-cur-
— _rent.
I CH1 error amp non-inverted input terminal.
I CH1 error amp inverted input terminal.
O CH1 error amp output terminal.
I CH1 comparator inverted input terminal.
I CH1 dead time control terminal.
I CH1 output current setting terminal.
O CH1 totem-pole output terminal.
— CH2 output transistor OFF-current setting terminal. Insert a capacitor be-
tween the Ca2 and the Cb2 terminals, then set the output transistor OFF-cur-
— _rent.
I CH2 error amp non-inverted input terminal.
I CH2 error amp inverted input terminal.
O CH2 error amp output terminal.
I CH2 comparator inverted input terminal.
I CH2 dead time control terminal.
I CH2 output current setting terminal.
O CH2 totem-pole output terminal.
— CH3 output transistor OFF-current setting terminal. Insert a capacitor be-
tween the Ca3 and the Cb3 terminals, then set the output transistor OFF-cur-
— _rent.
I CH3 error amp non-inverted input terminal.
I CH3 error amp inverted input terminal.
O CH3 error amp output terminal.
I CH3 comparator inverted input terminal.
I CH3 dead time control terminal.
I CH3 output current setting terminal.
O CH3 totem-pole output terminal.
— CH4 output transistor OFF-current setting terminal. Insert a capacitor be-
tween the Ca4 and the Cb4 terminals, then set the output transistor OFF-cur-
— _rent.
I CH4 error amp non-inverted input terminal.
I CH4 error inverted input terminal.
O CH4 error amp output terminal.
I CH4 comparator inverted input terminal.
(Continued)
3