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| UTC6651 MOTOR SPEED CONTROL CIRCUIT DESCRIPTION LI NEAR I NTEGRATED CI RCUI T The UTC6651 is a monolithic integrated circuit designed for the rotating speed control of a compact DC motor which is used for a tape recorder, recoder player etc. 1 FEATURES * Wide operating supply voltage:Vcc=3.5V- 14.4V * Small four-lead plastic package for compact motor. * Few external components * Stable low reference voltage( 1.0V, typical ), * Wide motor speed setting * Reverse voltage protection circuit built-in. * TO-126B BLOCK DIAGRAM CONTROL 2 VREF 4 MOTOR VCC 1 COM 3 GND YOUW ANG ELECTRONI CO. CS LTD 1 UTC6651 Characteristic Symbol LI NEAR I NTEGRATED CI RCUI T Value 14.4 2000 1300 -20 ~ +75 -40 ~ +150 ABSOLUTE MAXIMUM RATINGS(Ta=25C) Unit V mA mW C C Supply Voltage VCC Supply Current(note 1) Icc Power Dissipation(note 2) PD Operating Temperature Topr Storage Temperature Tstg NOTE: 1. Ta=25C,with a 10x10 mm bakelite PCB(3.5m Cu leaf) 2. Test time < 5seconds. ELECTRICAL CHARACTERISTICS(Ta=25C,unless otherwise specified) Characteristic Reference Voltage Bias Current Current Proportional Constant Saturation Voltage Voltage Characteristics 1 Voltage Characteristics 2 Current Characteristics 1 Current Characteristics 2 Temperature Characteristics 1 Temperature Characteristics 2 Symbol VREF IBias K VSAT V REF VREF K K V REF VREF K K V REF VREF K K Ta Ta I4 I4 Vcc Vcc Test Conditions VCC=6V Ra=1k Vcc=6V Vcc=6V,DI4=40mA VCC=4.2V,Ra=5.0 VCC=3.5V~14.0V,Ra=1k VCC=3.5V~14.0V,DI4=40mA I4=50mA~200mA I4=50mA~200mA TA=-20~+75C VCC=6.0V Ra=1k TA=-20~+75C VCC=6.0V DI4=40mA Min 0.85 35 Typ 1.0 0.8 40 1.15 -0.1 0.2 -0.02 -0.01 0.01 0.01 Max 1.15 1.8 45 2 Units V mA V %/V %/V %/mA %/mA %/C %/C CHARACTERISTICS CURVE Power Dissipation Vs. Temperature 2.0 APPLICATION CIRCUIT Vcc Micro Motor Rs 1 22H Ea Ra Power Dissipation, PD(W) 1.6 (1) 1.2 0.8 (1) With a 10x10mm blakelite PCB(35m Cu leaf) (2) Without heat sink RT 2 180 M 10F UTC6651 3 4 (2) 0.4 0 -20 20 60 100 140 180 Ambient Temperature,Ta(k) Motor Constant: Ka-- Electromotive force constant=1.1mV/rpm Ra-- Internal Resistor=5 KT=Torque Constant=100g.cm/A YOUW ANG ELECTRONI CO. CS LTD 2 |
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