UTC 1470
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
MOTOR SPEED REGULATORS
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.
1
TO-126B
1: Vcc
2: R
T
3: GND
4: MOTOR
BLOCK DIAGRAM
Vcc
1
RT
2
MO TO R
4
Vref
CO MPARATO R
STARTING
CIRCUIT
CURRENT
MILLO R
3
G ND
ABSOLUTE MAXIMUM RATINGS
( Ta=25°C )
PARAMETER
Supply Voltage
Circuit Current
Package Dissipation
Operating Temperature
Storage Temperature
SYMBOL
V
CC
I
4
P
D
Topt
T
STG
RATING
18
2*
1.2
-20 ~ +75
-40 ~ +150
*t≤5s
UNIT
V
A
W
℃
℃
UTC
UNISONIC TECHNOLOGIES CO. LTD
1
QW-R109-007,B
UTC 1470
PARAMETER
Supply Voltage Range
LINEAR INTEGRATED CIRCUIT
SYMBOL
V
CC
RECOMMENDED OPERATING CONDITION
PATING
3.5 ~ 16
UNIT
V
ELECTRICAL CHARACTERISTICS
(Ta=25°C,Vcc=12V)
CHARACTERISTIC
Reference Voltage
Quiescent Current
Reflection Coefficient
Saturation Voltage
SYMBOL
TEST CONDITIONS
MIN
TYP
1.27
0.8
20
1.5
0.4
0.06
-0.02
-0.02
0.01
0.01
MAX
1.40
1.2
22
2.0
UNIT
V
mA
V
%/V
%/V
%/mA
%/mA
%/℃
%/℃
Vref
Id
k
V4(sat)
△k
/△Vcc
k
△Vref
Line Regulation
/△Vcc
Vref
△k
/△I
M
k
△Vref
Load Regulation
/△I
M
Vref
△k
/△Ta
k
△Vref
Temperature Coefficient
/△Ta
Vref
*Pulse Test::PW≤10ms,Duty cycle≤2%
I
4
=10mA
(Fig.1) 1.10
R
M
=180Ω
(Fig.4) 0.5
RM1=44Ω,Rm2=33Ω
(Fig.2)
18
Vcc=4.2V,Rm=4.4Ω
(Fig.3)
I
4
=100mA,Vcc=6.3½16V
(Fig.2)
I
4
=100mA,Vcc=6.3½16V
(Fig.1)
I
4
=30½200mA
(Fig.2)
I
4
=30½200mA
(Fig.1)
I
4
=100mA,Ta=-20½+75℃
(Fig.2)
I
4
=100mA,Ta=-20½+75℃
(Fig.1)
TEST CIRCUIT
Fig.1
△
Vref
△Vref
△Vcc,
Vref
Vref
△Vref
△
Ta
Vref
Vref,
△I
4
Fig.2
k,
△k
k
Vcc
390
Ω
V
2
1
IC
3
4
1
R
M
A1
390
Ω
2
IC
3
4
I
4
(SW
K= I
2
(SW
2
2
△k
k
△Vcc,
△Ta
△
k
k
△I
4
Vcc
I
2
A2
SW
1
2
I
4
R
M1
R
M2
) - I
4
(SW
1
)
) - I
2
(SW
1
)
UTC
UNISONIC TECHNOLOGIES CO. LTD
2
QW-R109-007,B
UTC 1470
Fig.3
V
4
(sat)
LINEAR INTEGRATED CIRCUIT
Fig.4
Vcc
4.4Ω
A1
390
Ω
I
2
A2
180Ω
2
3
4
I
d
=I
2
-
I4
K
(Id)
Vcc
I
4
2
1
IC
3
4
V
1
IC
APPLICATION INFORMATION
L
Vcc
R
T
R
S
1
2
4
R
T
:Torque Control Resistance
R
S
:Speed Control Resistance
M Motor
Vref
COMPARATOR
STARTING
CIRCUIT
3
CURRENT
MILLOR
UTC
UNISONIC TECHNOLOGIES CO. LTD
3
QW-R109-007,B
UTC 1470
LINEAR INTEGRATED CIRCUIT
Em
M
R
T
i2
2
1
1470
3
4
R
S
BASIC EQUATION FOR MOTOR
Vref
)
E
t
= Vref + R
T
(
i
2
+
Rs
Vcc
1
i
2
=
i
4
+
i
q
K
Vref
i
4
=
i
m
+
Rs
1
Vref
E
t
= Vref + R
T
(
i
4
+
i
q + Rs )
K
1
Vref
Vref )
(
i
m
+
+
i
q +
E
t
= Vref + R
T
{
}
Rs
Rs
K
1
R
T
R
T
( 1+ ) } + R
T
i
q
+
E
t
= Vref { 1 +
i
m
Rs
K
K
︷
i
m
i
4
They also give : Em = Eo + R
m
i
m
1
R
T
} + R
T
i
q
( 1+
Eo = Vref {1 +
K
Rs
Rm = R
T
K
︷
E
t
Eo : Back Electromotive Force
Rm: internal Resistance(of the Motor)
K : Reflection Confficient = (
i
4 /
i
2 )
﹙
APPLICATION CIRCUIT
Vcc
L (47μH)
R
T
R
S
1
2
4
M
Motor
Vcc = 12V
R
m
= 19.5Ω
R
T
= 330Ω
Rs = 1kΩ
Eo = 2.3V
K = 20
Vref
COMPARATOR
STARTING
CIRCUIT
3
CURRENT
MILLOR
Note 1.The motor speed can be adjusted by the varisble resistor
Rs
min.
=
Vref
*
R
T
Eo - Vref- Iq
*
R
T
R
S
.
Note 2. If R
Tmax.
> k
*
Rm min,instabilicy of the motor may occur.
UTC
UNISONIC TECHNOLOGIES CO. LTD
4
QW-R109-007,B
UTC 1470
LINEAR INTEGRATED CIRCUIT
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.
UTC
UNISONIC TECHNOLOGIES CO. LTD
5
QW-R109-007,B
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