UTC 1470
LINEAR INTEGRATED CIRCUIT
BIPOLAR ANALOG INTEGRATED
CIRCUIT
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
1
*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: 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,A
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
UTC
3
4
1
2
1
2
IC
I4
SW
390Ω
2
A2
I2
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,A
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,A
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
RS
RT
i2
i4
2
1470
1
4
3
︷
They also give : Em = Eo + R m im
1
RT
} + RT i q
( 1+
Eo = Vref {1 +
K
Rs
T
R
Rm =
K
im
M
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,A