UTC 1470 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
1
QW-R109-007,B
MOTOR SPEED REGULATORS
DESCRIPTION
The UTC 1470 is a monolithic integrated circuit intended
as speed regulators for DC motors of record players, tape
and cassette recorders etc .
FEATURES
*Excellent Versatility in use.
*High Output current.
*Low Quiescent current.
*Low Reference voltage.
*Excellent parameters stability versus temperature.
*Excellent characteristic at low supply voltage.
TO-126B
1
1: Vcc 2: R
T
3: GND 4: MOTOR
BLOCK DIAGRAM
1
2
4
3
Vref
STARTING
CIRCUIT
COMPARATOR
CURRENT
MILLOR
GND
Vcc
RT
MOTOR
ABSOLUTE MAXIMUM RATINGS
( Ta=25
C )
PARAMETER SYMBOL
RATING
UNIT
Supply Voltage
V
CC
18 V
Circuit Current
I
4
2*
A
Package Dissipation
P
D
1.2 W
Operating Temperature
Topt
-20 ~ +75
Storage Temperature
T
STG
-40 ~ +150
*t5s
UTC 1470 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
2
QW-R109-007,B
RECOMMENDED OPERATING CONDITION
PARAMETER SYMBOL
PATING
UNIT
Supply Voltage Range
V
CC
3.5 ~ 16
V
ELECTRICAL CHARACTERISTICS
(Ta=25
C,Vcc=12V)
CHARACTERISTIC SYMBOL TEST
CONDITIONS
MIN
TYP
MAX
UNIT
Reference Voltage
Vref
I
4
=10mA (Fig.1)
1.10
1.27
1.40
V
Quiescent Current
Id
R
M
=180 (Fig.4) 0.5
0.8 1.2 mA
Reflection Coefficient
k
RM1=44,Rm2=33 (Fig.2)
18
20 22
Saturation Voltage
V4(sat)
Vcc=4.2V,Rm=4.4 (Fig.3)
1.5 2.0 V
k
k
/
Vcc
I
4
=100mA,Vcc=6.316V
(Fig.2)
0.4 %/V
Line Regulation
Vref
Vref
/
Vcc
I
4
=100mA,Vcc=6.316V
(Fig.1)
0.06 %/V
k
k
/
I
M
I
4
=30200mA
(Fig.2)
-0.02 %/mA
Load Regulation
Vref
Vref
/
I
M
I
4
=30200mA
(Fig.1)
-0.02 %/mA
k
k
/
Ta
I
4
=100mA,Ta=-20+75
(Fig.2)
0.01 %/
Temperature Coefficient
Vref
Vref
/
Ta
I
4
=100mA,Ta=-20+75
(Fig.1)
0.01 %/
*Pulse Test::PW10ms,Duty cycle2%
TEST CIRCUIT
V
IC
390
Vcc
1
3
2
4
R
M
IC
390
Vcc
1
3
2
4
R
M1
A1
A2
1
2
R
M2
I
4
SW
I
2
Fig.1
Fig.2
Vref, Vref
Vref
Vcc,
Vref
Vref
I
4
Vref
Vref
Ta
k,
k
k
Vcc,
k
k
I
4
k
k
Ta
I
4
(SW ) - I
4
(SW )
K= I
2
(SW ) - I
2
(SW )
2
1
2
1
UTC 1470 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
3
QW-R109-007,B
V
IC
Vcc
1
3
2
4
4.4
Fig.3
V
4
(sat)
IC
390
Vcc
1
3
2
4
A1
A2
I
4
I
2
Fig.4
180
(Id)
I
d
=I
2
-
I4
K
APPLICATION INFORMATION
1
2
4
3
Vref
STARTING
CIRCUIT
COMPARATOR
CURRENT
MILLOR
M
Vcc
L
R
T
R
S
Motor
R
T
:Torque Control Resistance
R
S
:Speed Control Resistance
UTC 1470 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
4
QW-R109-007,B
BASIC EQUATION FOR MOTOR
M
Vcc
Em
i
m
R
T
R
S
1
3
2
4
E
t
i2
i
4
1470
E
t
= Vref + R
T
(
i
2
+
Vref
Rs
)
i
2
=
1
K
i
4
+
i
q
i
4
=
i
m
+
Vref
Rs
1
K
i
4
+
i
q +
Vref
Rs
)
E
t
= Vref + R
T
{
1
K
(
i
m
+ Vref
Rs
)+
i
q +
E
t
= Vref { 1 +
R
T
Rs
( 1+ 1
K
+ R
T
i
q
+
i
m
They also give : Em = Eo + R
m
i
m
Eo = Vref {1 +
( 1+
}+ R
T
i
q
Eo : Back Electromotive Force
Rm: internal Resistance(of the Motor)
K : Reflection Confficient = (
i
4 /
i
2 )
E
t
= Vref + R
T
(
)
Vref
Rs
}
R
T
K
}
R
T
Rs
1
K
Rm = R
T
K
APPLICATION CIRCUIT
1
2
4
3
Vref
STARTING
CIRCUIT
COMPARATOR
CURRENT
MILLOR
M
Vcc
L
R
T
R
S
Motor
(47H)
Vcc = 12V
R
m
= 19.5
R
T
= 330
Rs = 1k
Eo = 2.3V
K = 20
Note 1.The motor speed can be adjusted by the varisble resistor R
S
.
Note 2. If R
Tmax.
> k
*
Rm min,instabilicy of the motor may occur.
Rs
min.
=
Vref
*
R
T
Eo - Vref- Iq
*
R
T
UTC 1470 LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
5
QW-R109-007,B
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
PDF 
ZIP