MB3785A_03 Datasheet, PDF (27/30 Pages) Fujitsu Component Limited. – Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities)

MB3785A
s EXAMPLE OF APPLICATION CIRCUIT
Motor
Control
Signal
Motor
Control
Signal
VCC
33 µF
A
4.7 kΩ
150 kΩ
4.7 kΩ
+IN
7
–IN
6
FB
5
RFB
B
33 kΩ
8
DTC
4
27 kΩ
1 µF
C
+IN
12
4.7 kΩ
150 kΩ
–IN ₁₁
FB
10
4.7 kΩ RFB
D
27 kΩ
13
DTC
9
33 kΩ
1 µF
E
150 kΩ
+IN
25
–IN
26
FB
27
RFB
F
10 kΩ
24
DTC
28
G
150 kΩ
+IN
30
–IN
31
FB
32
RFB
H
10 kΩ
29
DTC
33
VREF
19
SCP
23
0.1 µF
CH1
CH2
CH3
CH4
1000 pF
1
48
45 ^VCC
10 µH
33 µF
B
22 µH
10 µF
OUT
46
1000 pF
10 mA
A
47
250 Ω
1000 pF
3
2
5V
8.2 kΩ
2.7 kΩ
24 V
OUT
44
1000 pF
10 mA
43
250 Ω
1000 pF
34
35
OUT
40
1000 pF
10 mA
41
250 Ω
1000 pF
36
37
OUT
39
1000 pF
10 mA
38
250 Ω
D _{15 V}
20 kΩ
15
µF
1.8 kΩ
C
F
22 µH
10 µF
DC motor
8.2 kΩ
2.7 kΩ
E
H
22 µH
10 µF
DC motor
8.2 kΩ
2.7 kΩ
G
VCC
18
GND
42
14 15 16 17
20 21 22
RT ^CT 300 pF CTL1 CTL2 CTL3
6.2 kΩ
Ceramic Resonator
Output Control Signals
27