UTC 1470
LINEAR INTEGRATED CIRCUIT
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.
1
TO-126B
1: Vcc
2: RT
3: GND
4: MOTOR
BLOCK DIAGRAM
Vcc
RT
MO TO R
1
2
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
UTC
SYMBOL
RATING
UNIT
VCC
I4
PD
Topt
TSTG
18
2*
1.2
-20 ~ +75
-40 ~ +150
*t≤5s
V
A
W
℃
℃
UNISONIC TECHNOLOGIES
CO. LTD
1
QW-R109-007,B
UTC 1470
LINEAR INTEGRATED CIRCUIT
RECOMMENDED OPERATING CONDITION
PARAMETER
Supply Voltage Range
SYMBOL
PATING
UNIT
VCC
3.5 ~ 16
V
ELECTRICAL CHARACTERISTICS (Ta=25°C,Vcc=12V)
CHARACTERISTIC
SYMBOL
Reference Voltage
Quiescent Current
Reflection Coefficient
Saturation Voltage
Vref
Id
k
V4(sat)
△k
/△Vcc
k
△Vref
Line Regulation
/△Vcc
Vref
△k
/△IM
k
△Vref
Load Regulation
/△IM
Vref
△k
/△Ta
k
△Vref
Temperature Coefficient
/△Ta
Vref
*Pulse Test::PW≤10ms,Duty cycle≤2%
MIN
TYP
MAX
UNIT
I4=10mA
(Fig.1) 1.10
RM=180Ω
(Fig.4) 0.5
RM1=44Ω,Rm2=33Ω
(Fig.2)
18
Vcc=4.2V,Rm=4.4Ω
(Fig.3)
I4=100mA,Vcc=6.3～16V
(Fig.2)
I4=100mA,Vcc=6.3～16V
(Fig.1)
I4=30～200mA
(Fig.2)
I4=30～200mA
(Fig.1)
I4=100mA,Ta=-20～+75℃
(Fig.2)
I4=100mA,Ta=-20～+75℃
(Fig.1)
TEST CONDITIONS
1.27
0.8
20
1.5
0.4
1.40
1.2
22
2.0
V
mA
V
%/V
0.06
%/V
-0.02
%/mA
-0.02
%/mA
0.01
%/℃
0.01
%/℃
TEST CIRCUIT
Fig.1
Fig.2
△Vref
Vref
△Vref
△ Ta
Vref
Vref,
△Vref
△Vcc,
Vref
△I4
△k
k
k,
△Vcc,
△k
k
△ k
k
△I4
△Ta
Vcc
Vcc
RM
390Ω
V
A1
1
3
4
1
I4
SW
2
1
2
IC
UTC
I2
390Ω
2
A2
RM1
IC
3
RM2
4
UNISONIC TECHNOLOGIES
I4 (SW
K= I2 (SW
2
2
) - I4 (SW 1 )
) - I2 (SW 1 )
CO. LTD
2
QW-R109-007,B
UTC 1470
Fig.3
LINEAR INTEGRATED CIRCUIT
Fig.4
V4(sat)
(Id)
Vcc
Vcc
4.4Ω
A1
I2
390Ω
A2
I4
180Ω
2
1
IC
3
4
V
IC
1
2
Id=I2 -
4
3
I4
K
APPLICATION INFORMATION
L
RT:Torque Control Resistance
RS:Speed Control Resistance
Vcc
M Motor
RT
RS
1
2
4
Vref
COMPARATOR
STARTING
CIRCUIT
CURRENT
MILLOR
3
UTC
UNISONIC TECHNOLOGIES
CO. LTD
3
QW-R109-007,B
UTC 1470
LINEAR INTEGRATED CIRCUIT
BASIC EQUATION FOR MOTOR
Em
︷
Vref
)
Et= Vref + RT( i2 +
Rs
Vcc
1
i 2=
i4 + iq
K
Vref
i 4= i m +
Rs
1
Vref
Et = Vref + RT (
i4+iq + Rs )
K
1
Vref
Vref )
(i m +
+ iq +
Et= Vref + RT {
}
Rs
Rs
K
1 }
RT
RT
( 1+ ) + RT iq +
Et= Vref { 1 +
im
Rs
K
K
im
M
RS
RT
i2
i4
2
1470
1
︷
They also give : Em = Eo + R m im
1
RT
} + RT i q
( 1+
Eo = Vref {1 +
K
Rs
T
R
Rm =
K
4
3
Et
Eo : Back Electromotive Force
Rm: internal Resistance(of the Motor)
K : Reflection Confficient = ( i4 / i2 )
﹙
APPLICATION CIRCUIT
Vcc
L (47μH)
M
RT
Motor
RS
1
2
4
Vcc = 12V
Rm = 19.5Ω
RT = 330Ω
Rs = 1kΩ
Eo = 2.3V
K = 20
Vref
COMPARATOR
STARTING
CIRCUIT
CURRENT
MILLOR
3
Note 1.The motor speed can be adjusted by the varisble resistor
Rsmin.=
R S.
Vref * RT
Eo - Vref- Iq*RT
Note 2. If RTmax.> 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