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MB3788
APPLICATION CIRCUIT
4.7 k
4.7 k
8.2 k
(a)
0.22 F
2.7 k
4.7 k
4.7 k
3.8 k
(b)
0.22 F
2.7 k
18
V
CC
+
-
33 F
13
14
V
CTL2
CTL1
8
+IN1 (E)
Channel 1
-IN1 (E)
7
(dB)
V
100 k
FB1
6
9
-IN1 (C)
+IN2 (E)
17
-IN2 (E)
18
Channel 2
100 k
(deg)
FB2
19
-IN2 (C)
16
V
SCP
-IN(PWM)
REF
12
15
10
0.1 F
Triangular wave signal
C
T
<MB3785A-used DC/DC converter>
10 H
+
-
11
CC
Cb1
4
1000 pF
Ca1
5
(out)
1
CC
OUT1
2
150
(15 mA)
VE1
3
20
Ca2
1000 pF
21
Cb2
23
OUT2
150
22
VE2
GND
24
1.9 V
1.3 V
<Analog power supply>
<Sensor power supply>
<DC motor speed control>
<DC motor speed control>
33 F
<Logic power supply>
(a)
22 H
5 V
+
10 F
-
<Logic power supply>
(b)
22 H
3 V
+
-
10 F
+15 V
+24 V
DC motor 1
DC motor 2
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