UTC6651 LINEAR INTEGRATED CIRCUIT MOTOR SPEED CONTROL CIRCUIT DESCRIPTION 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 COM 1 3 GND YOUW ANG ELECTRONICS CO.LTD 1 UTC6651 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS(Ta=25°C) Characteristic Symbol Supply Voltage VCC Supply Current(note 1) Icc Power Dissipation(note 2) PD Operating Temperature Topr Storage Temperature Tstg NOTE: 1. Ta=25°C,with a 10x10 mm bakelite PCB(3.5µm Cu leaf) 2. Test time < 5seconds. Value Unit 14.4 2000 1300 -20 ~+75 -40 ~ +150 V mA mW °C °C ELECTRICAL CHARACTERISTICS(Ta=25°C,unless otherwise specified) Characteristic Symbol Reference Voltage Bias Current Current Proportional Constant Saturation Voltage VREF IBias K VSAT ∆V REF Voltage Characteristics 1 VREF K VREF K Temperature Characteristics 1 Temperature Characteristics 2 CHARACTERISTICS CURVE V mA 35 VCC=3.5V~14.0V,DI4=40mA 0.2 %/V I4 I4=50mA~200mA -0.02 %/mA I4 I4=50mA~200mA -0.01 %/mA Ta TA=-20~+75°CVCC=6.0V Ra=1kΩ 0.01 %/°C Ta TA=-20~+75°CVCC=6.0V DI4=40mA 0.01 %/°C APPLICATION CIRCUIT Power Dissipation Vs. Temperature Vcc Power Dissipation, PD(W) 2.0 (1) With a 10x10mm blakelite PCB(35µm Cu leaf) (2) Without heat sink 1.6 RT 180Ω Micro Motor 22µH M Ea Ra 10µF 2 (1) Rs 1.2 0.8 V Vcc ∆K K Units 1.15 1.8 45 2 %/V ∆V REF VREF Max 1.0 0.8 40 1.15 -0.1 ∆K Current Characteristics 2 Typ VCC=3.5V~14.0V,Ra=1kΩ ∆V REF Current Characteristics 1 Min 0.85 Vcc ∆K Voltage Characteristics 2 Test Conditions VCC=6VRa=1kΩ Vcc=6V Vcc=6V,DI4=40mA VCC=4.2V,Ra=5.0Ω 1 UTC6651 4 (2) 3 0.4 0 -20 20 60 100 140 Ambient Temperature,Ta(k) 180 Motor Constant: Ka-- Electromotive force constant=1.1mV/rpm Ra-- Internal Resistor=5Ω K T=Torque Constant=100g.cm/A YOUW ANG ELECTRONICS CO.LTD 2