TDA7274

TDA7274 LOW-VOLTAGE DC MOTOR SPEED CONTROLLER WIDE OPERATING VOLTAGE RANGE (1.8 to 6 V) BUILT-IN LOW-VOLTAGE REFERENCE (0.2 V) LINEARITY IN SPEED ADJUSTMENT HIGH STABILITY VS. TEMPERATURE LOW NUMBER OF EXTERNAL PARTS MINIDIP DESCRIPTION The TDA7274 is a monolithic integrated circuit DC motor speed controller intended for use in microcassettes, radio cassette players and other consumer equipment. It is particulary suitable for low-voltage applications. ORDERING NUMBER : TDA7274 PIN CONNECTION (top view) November 1988 1/10 TDA7274 APPLICATION CIRCUIT VS = 3.0V RM = 4.9Ω RT = 220Ω Eg = 1.65V IM = 100mA VM = RM IM + Eg = 2.14V SCHEMATIC DIAGRAM 2/10 TDA7274 ABSOLUTE MAXIMUM RATINGS Symbol VS IM Ptot Supply Voltage Motor Current Power Dissipation at Tamb = 25°C Parameter Value 6 700 1.25 Unit V mA W THERMAL DATA Symbol Rth j-amb Parameter Thermal Resistance Junction-ambient Max. Value 100 Unit °C/W ELECTRICAL CHARACTERISTICS (Refer to test circuit, VS = 3V, Tamb = 25°C unless otherwise specified) Symbol VS Vref Iq Id (Pin 6) K Parameter Supply Voltage Range Reference Voltage Quiescent Current Quiescent Current Shunt Ratio Residual Voltage Line Regulation Voltage Characteristic of Shut Ratio Load Regulation Current Characteristic of Shut Ratio IM = 100mA IM = 100mA IM = 100mA VS = 1.8 to 6V IM = 100mA VS = 1.8 to 6V IM = 20 to 200mA IM = 20 to 200mA IM = 100mA Tamb = –20 to +60°C IM = 100mA Tamb = 20 to +60°C 45 IM = 100mA Test Condition Min. 1.8 0.18 0.20 2.4 120 50 0.1...