ICs for Motor
n Overview
The AN6657 and the AN6657S are the electronic gov-
ernors capable of controlling the forward/reverse speed,
fast forward, rewind, and start/stop of the micromotors
used for the radio/cassette tape recorders, automatic an-
swering telephone sets, and so on.
n Features
• Wide operating supply voltage range ; V
CC
=4.5V to
14V
• Stable reference voltage (1.3V) and easy speed control
• Large starting torque and maximum control torque
• Good secular drift because of external power transistor
• Provided with the motor stop function ; I
CC
=20µA or
less at stop time
• Capable of controlling forward/reverse rotation, fast for-
ward/constant speed, and start/stop via 3 input pins
n Applications
• Speed control of the micromotors for the radio cas-
settes
• Speed control of the micromotors for the microcas-
settes of the automatic answering telephone sets
• Control of the tape loading motors for the DATs, etc.
AN6657, AN6657S
Micromotor Forward/ Reverse Electronic Governors
1
2
3
4
5
6
7
8
21.7
–
0.3
1.2
–
0.25
3 ~ 15˚
Unit : mm
6.3– 0.25
0.5
–
0.1
2.54
(3.45)
7.62– 0.25
0.3
+ 0.1
– 0.05
0.51min.
3.8– 0.25
16
15
14
13
12
11
10
9
AN6657
16-Lead DIP Package (DIP016-P-0300E)
16 15 14 13 12 11 10 9
1 2 3 4 5 6 7 8
Amp.
Drive Mode
Swiching Logic
Ref.Voltage
1kΩ
10kΩ
GND VCC
For./Rev.
Drive Circuit
n Block Diagrom
Unit : mmAN6657S
0.4
0.4
–
0.25
1.27
0.1
–
0.1
0.3
1.5
–
0.2
0.650.15
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
10.1
–
0.3
6.5– 0.3
4.2– 0.3
16-Lead SOP Package (SOP016-P-0300)