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| 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=25C ) 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 *t5s 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=25C,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 /IM k Vref Load Regulation /IM Vref k /Ta k Vref Temperature Coefficient /Ta Vref *Pulse Test::PW10ms,Duty cycle2% I4=10mA (Fig.1) 1.10 RM=180 (Fig.4) 0.5 RM1=44,Rm2=33 (Fig.2) 18 Vcc=4.2V,Rm=4.4 (Fig.3) I4=100mA,Vcc=6.316V (Fig.2) I4=100mA,Vcc=6.316V (Fig.1) I4=30200mA (Fig.2) I4=30200mA (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 390 V 2 1 IC 3 4 1 RM A1 390 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 4.4 A1 390 I2 A2 180 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 i2= i4 + iq K Vref i4= im + Rs 1 Vref Et = Vref + RT ( i4+iq + Rs ) K 1 Vref Vref ) (im+ + 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 + Rmim 1 RT } + RT iq ( 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 (47H) RT RS 1 2 4 M Motor Vcc = 12V Rm = 19.5 RT = 330 Rs = 1k 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 RS. 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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