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Электронный компонент: AN6612

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ICs for Motor
s
Overview
The AN6612 and the AN6612S are the electronic gov-
ernor circuits suitable for the rotating speed control of a
low voltage and compact DC motor which is used for a
small tape recorder, etc.
s
Features
Wide range of operating voltage : V
CC (opr)
=1.8V ~ 8V
2 package types
Fewer external parts
Speed control in steps with linear fine control
Output current limiting circuit is built-in
AN6612, AN6612S
Motor Control Circuits
1
2
3
4
6.3
0.3
3.8
0.25
(3.45)
2.54
1.2
0.25
0.5
0.1
7.62
0.25
3 ~ 15
0.15
+ 0.1
0.05
9.4
0.3
0.51min.
8
7
6
5
8-Lead DIP Package (DIP008-P-0300B)
Unit : mm
AN6612
8
7
6
5
1
2
3
4
Comparator
+
1k
10k
R
9
R
10
Ref.Voltage
Start
Circuit
V
M
V
O
V
B
GND
V
RM
V
RP
V
I
V
CC
s
Block Diagram
1
2
3
4
0.4
0.25
0.6
0.3
1.27
0.1
0.1
0.3
0.15
0.65
1.5
0.2
5.0
0.3
4.2
0.3
6.5
0.3
8
7
6
5
8-Lead SOP Package (SOP008-P-0225A)
Unit : mm
AN6612S
ICs for Motor
AN6612, AN6612S
Pin No.
Pin Name
1
2
3
4
Current Sensor
Reference Voltage
Control
V
CC
s
Pin Descriptions
Pin No.
Pin Name
5
6
7
8
GND
Base
Output Base
Motor pin
s
Absolute Maximum Ratings
(Ta= 25C)
V
CC
I
4
P
D
T
opr
T
stg
Supply Voltage
Supply Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
V
mA
mW
C
C
Parameter
Symbol
Rating
Unit
10
5
400
200
20 ~ + 75
40 ~ +150
40 ~ +125
AN6612
AN6612S
AN6612
AN6612S
s
Electrical Characteristics
(Ta = 25C)
V
CC
= 3V
V
CC
= 3V, R
21
= 10k
V
CC
= 1.8V, Ra
= 4.9
Parameter
Symbol
Condition
min.
typ.
max.
Unit
1.9
1.32
0.1
0.035
0.7
Supply Current
Reference Voltage
Starting Current
Voltage Variable Characteristics for
Rotating Speed
Time Drift Characteristics for Rotating
Speed
Temperature Variation
Characteristics for Rotating Speed
Output Current Limit Voltage
I
4
V
2 1
I
a
|
N
V
|
|
N
T
|
N
A
*
V
t (1 5)
mA
V
mA
rpm/V
%
%/C
V
1.24
250
3
1.40
10
0.8
* In case that only IC temperature is changed.
V
CC
= 1.8V ~ 4V,
I
L
= 72mA (1.7g cm)
V
CC
= 3V, I
L
= 72mA,
t
= 15s ~ 10min.
V
CC
= 3V, I
L
= 72mA,
Ta
= 20C ~ + 60C
V
CC
= 3V
0.6
1
2
3
4
5
6
7
8
AN6612
AN6612S
+
+
M
2.2
F
10
910
1k
10k
V
CC
+V
CC
0.47
F
2SA881A
Motor
VR3kB
VR500
B
0.5
Motor Constants
R
a
: Internal resistor = 4.9
K
a
: Electromotive force constant = 0.4mV/rpm
K
T
: Torque constant = 29g cm/A
s
Application Circuit