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1470 [UTC]

LINEAR INTEGRATED CIRCUIT; 线性集成电路
1470
型号： 1470
厂家： Unisonic Technologies    Unisonic Technologies
描述：

LINEAR INTEGRATED CIRCUIT
线性集成电路
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UTC1470  
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.  
1
*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  
RT  
2
MOTOR  
4
Vcc  
1
Vref  
COMPARATOR  
STARTING  
CIRCUIT  
CURRENT  
MILLOR  
3
GND  
ABSOLUTE MAXIMUM RATINGS ( Ta=25°C )  
PARAMETER  
SYMBOL  
VCC  
RATING  
UNIT  
V
A
Supply Voltage  
18  
2*  
Circuit Current  
I4  
Package Dissipation  
Operating Temperature  
Storage Temperature  
PD  
Topt  
TSTG  
1.2  
W
℃
-20 ~ +75  
-40 ~ +150  
*t≤5s  
℃
1
UTC UNISONIC TECHNOLOGIES CO. LTD  
QW-R109-007,B  
UTC1470  
LINEAR INTEGRATED CIRCUIT  
RECOMMENDED OPERATING CONDITION  
PARAMETER  
SYMBOL  
VCC  
PATING  
3.5 ~ 16  
UNIT  
V
Supply Voltage Range  
ELECTRICAL CHARACTERISTICS (Ta=25°C,Vcc=12V)  
CHARACTERISTIC  
Reference Voltage  
Quiescent Current  
SYMBOL  
TEST CONDITIONS  
MIN TYP MAX UNIT  
Vref  
Id  
k
I4=10mA  
(Fig.1) 1.10 1.27  
1.40  
1.2  
22  
V
RM=180Ω  
(Fig.4)  
(Fig.2)  
(Fig.3)  
0.5  
18  
0.8  
20  
1.5  
0.4  
mA  
RM1=44Ω,Rm2=33Ω  
Vcc=4.2V,Rm=4.4Ω  
I4=100mA,Vcc=6.3～16V  
(Fig.2)  
I4=100mA,Vcc=6.3～16V  
(Fig.1)  
Reflection Coefficient  
Saturation Voltage  
V
V4(sat)  
2.0  
%/V  
△k  
/△Vcc  
/△Vcc  
/△IM  
k
△Vref  
Vref  
△k  
Line Regulation  
0.06  
-0.02  
-0.02  
0.01  
0.01  
%/V  
%/mA  
%/mA  
%/℃  
I4=30～200mA  
(Fig.2)  
k
△Vref  
Vref  
△k  
I4=30～200mA  
(Fig.1)  
I4=100mA,Ta=-20～+75℃  
(Fig.2)  
Load Regulation  
/△IM  
/△Ta  
k
△Vref  
Vref  
I4=100mA,Ta=-20～+75℃  
(Fig.1)  
%/℃  
Temperature Coefficient  
/△Ta  
*Pulse Test::PW≤10ms,Duty cycle≤2%  
TEST CIRCUIT  
Fig.1  
Fig.2  
△Vref  
Vref  
△ k  
k
△Vref  
△k  
k
Vref,  
k,  
△k  
k
△Vcc,  
△Vcc,  
△Ta  
△I4  
△I4  
Vref  
△Vref  
△ Ta  
Vref  
Vcc  
Vcc  
RM  
390Ω  
A2  
SW  
A1  
I2  
I4  
V
Ω
390  
2
1
2
2
RM1  
K=  
RM2  
IC  
1
4
IC  
3
1
4
3
1
2
2
I4 (SW  
I2 (SW  
) - I4 (SW  
) - I2 (SW  
)
)
1
2
UTC UNISONIC TECHNOLOGIES CO. LTD  
QW-R109-007,B  
UTC1470  
LINEAR INTEGRATED CIRCUIT  
Fig.3  
Fig.4  
(Id)  
V4(sat)  
Vcc  
Vcc  
Ω
4.4  
A2  
180Ω  
A1  
390Ω  
I2  
I4  
2
2
IC  
1
4
IC  
Id=I2 - I4  
K
3
V
1
4
3
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
3
UTC UNISONIC TECHNOLOGIES CO. LTD  
QW-R109-007,B  
UTC1470  
LINEAR INTEGRATED CIRCUIT  
BASIC EQUATION FOR MOTOR  
Em  
M
Vref  
)
Et= Vref + RT( i2 +  
Rs  
Vcc  
1
im  
i2=  
i4 + iq  
Vref  
Rs  
K
i4= im +  
RT  
1
RS  
4
1
Vref  
)
(
Et = Vref + RT  
Et= Vref + RT {  
i4+iq +  
Rs  
Vref  
Rs  
i2  
K
i4  
1
2
Vref  
Rs  
)
(im+  
1
+ iq +  
}
K
1470  
RT  
RT ( 1+  
}
)
1 +  
Et= Vref {  
+ RT iq +  
im  
Rs  
K
K
3
They also give : Em = Eo + Rmim  
1
K
RT  
Rs  
}
( 1+  
Eo = Vref {  
1 +  
+ RT iq  
Et  
RT  
K
Rm =  
Eo : Back Electromotive Force  
Rm: internal Resistance(of the Motor)  
﹙
K
: Reflection Confficient = ( i4 / i2 )  
APPLICATION CIRCUIT  
L
(47μH)  
Vcc  
Vcc = 12V  
Rm = 19.5Ω  
RT = 330Ω  
Rs = 1kΩ  
Eo = 2.3V  
K = 20  
M
4
Motor  
RT  
RS  
1
2
Vref  
COMPARATOR  
STARTING  
CIRCUIT  
CURRENT  
MILLOR  
3
Note 1.The motor speed can be adjusted by the varisble resistor RS.  
Vref * RT  
Rsmin.=  
Eo - Vref- Iq*RT  
Note 2. If RTmax.> k * Rm min,instabilicy of the motor may occur.  
4
UTC UNISONIC TECHNOLOGIES CO. LTD  
QW-R109-007,B  
UTC1470  
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.  
5
UTC UNISONIC TECHNOLOGIES CO. LTD  
QW-R109-007,B  

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