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: RT
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
VCC I4 PD Topt TSTG
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
VCC
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%
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 CIRCUIT
Fig.1 △ Vref Vref △ Vref △ Ta Vref Vref, △Vref △ Vcc, Vref △I4 Fig.2 k, △k k Vcc 390Ω V 2 1 IC 3 4 1 RM A1 390Ω 2 IC 3 4 I4 (SW K= I2 (SW
2 2
△k k
△ Vcc, △Ta
△k k
△I4
Vcc I2 A2 SW
1 2
I4
RM1
RM2 ) - I4 (SW 1 ) ) - I2 (SW 1 )
UTC
UNISONIC TECHNOLOGIES
CO. LTD
2
QW-R109-007,B
UTC 1470
Fig.3 V4(sat)
LINEAR INTEGRATED CIRCUIT
Fig.4 Vcc 4.4Ω A1 390Ω I2 A2 180Ω 2 3 4 Id=I2 I4 K
(Id) Vcc I4
2 1 IC 3 4 V 1 IC
APPLICATION INFORMATION
L Vcc RT RS 1 2 4 RT:Torque Control Resistance RS: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 RT i2 2 1 1470 3 4 RS
BASIC EQUATION FOR MOTOR
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
i4
They also give : Em = Eo + R m im 1 RT } + RT i q ( 1+ Eo = Vref {1 + K Rs RT Rm = K
︷
Et Eo : Back Electromotive Force Rm: internal Resistance(of the Motor) K : Reflection Confficient = ( i4 / i2 )
﹙
APPLICATION CIRCUIT
Vcc L (47μH) RT RS 1 2 4 M Motor Vcc = 12V Rm = 19.5Ω RT = 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 Rsmin.= Vref * RT Eo - Vref- Iq*RT
R S.
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
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