AN6650

AN6650 LINEAR INTEGRATED CIRCUIT MOTOR SPEED CONTROL CIRCUIT DESCRIPTION The AN6650 is a monolithic integrated circuit, designed for the tape recorder. SOP-8 FEATURES *Wide operating supply voltage: Vcc=1.8V-7V *Few external components *Easy speed control mode DIP-8 BLOCK DIAGRAM Comp. Input VREFVREF+ VCC 4 1kΩ 1 2 Reference Voltage 3 Start Circuit 10kΩ 10kΩ Motor 7 8 Phase 5 GND 6 GND ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER Supply Voltage Terminal Voltage Terminal 8 Voltage Supply Current Terminal 7 Current Power Dissipation DIP-8 SOP-8 Operating Temperature Storage Temperature *Test Time10kΩ 30mAcurrent flow to Ra VCC=1.8V,Ra=4.7Ω VCC=1.8V~7.0V 1.20 MIN TYP 2 1.28 1.0 0.2 0.1 MAX 3 1.35 1.2 0.5 1.25 UNIT mA V V V %/V TEST CIRCUIT 1 4 2 2 1 -1.25 Output Voltage Characteristics ∆VA VA ∆VCC VCC=1.8V~7.0V -1.2 0.1 1.2 %/V 3 Reference Voltage Current Characteristics Reference Voltage Temperature Characteristics ∆VREF VREF ∆I7 ∆VREF VREF ∆TA I7=1mA~20mA -0.2 0.01 0.2 %/mA 4 TA=-20~+60°C,VCC=3.0V 0.01 %/°C 4 TEST CIRCUIT V 8 7 6 5 Ra 4.7Ω 8 7 6 5 0.1 µF 0.1 µF 1 2 3 4 1 µF 9.1kΩ 1 1kΩ 2 0.47Ω 3 4 1 µF 10kΩ A VCC ∆VREF VREF VCC FIG.1 (Icc, ∆VCC ) FIG 2 (Vcc(s),Vsat) AN6650 LINEAR INTEGRATED CIRCUIT 8 7 6 5 8 7 6 5 Va Ra 4.7Ω 0.1 µF 0.1 µF 1 9.1k Ω 1k Ω 2 10Ω 3 4 1 µF A 1 9.1k Ω 1k Ω 2 10Ω 3 4 1 µF VCC V FIG 4 VCC FIG.3