TDA7272A

TDA7272A HIGH PERFORMANCE MOTOR SPEED REGULATOR TACHIMETRIC SPEED REGULATION WITH NO NEED FOR AN EXTERNAL SPEED PICKUP V/I SUPPLEMENTARY PREREGULATION DIGITAL CONTROL OF DIRECTION AND MOTOR STOP SEPARATE SPEED ADJUSTMENT 5.5V TO 18V OPERATING SUPPLY VOLTAGE 1A PEAK OUTPUT CURRENT OUTPUT CLAMP DIODES INCLUDED SHORT CIRCUIT CURRENT PROTECTION THERMAL SHUT DOWN WITH HYSTERESIS DUMP PROTECTION (40V) ESD PROTECTION DESCRIPTION TDA7272A are high performance motor speed controller for small power DC motors as used in cassette players. BLOCK DIAGRAM Powerdip(16+2+2) ORDERING NUMBER: TDA7272A Using the motor as a digital tachogenerator itself the performance of true tacho controlled systems is reached. A dual loop control circuit provides long term stability and fast settling behaviour. This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. June 1992 1/16 TDA7272A ABSOLUTE MAXIMUM RATINGS Symbol VS VS IO Ptot Top Tstg DC Supply Voltage Dump Voltage (300ms) Output Current Power Dissipation at Tpins = 90°C at Tamb = 70°C Operating Temperature Range Storage Temperature Parameter Value 24 40 Internally limited 4.3 1 -40 to 85 -40 to 150 W W °C °C Unit V V PIN CONNECTION (Top view) THERMAL DATA Symbol Rth j-amb R th j-pins Parameter Thermal Resistance Junction-ambient Thermal Resistance Junction-pins max. max. Value 80 14 Unit °C/W °C/W 2/16 TDA7272A TEST CIRCUIT A ELCTRICAL CHARACTERISTICS (Tamb ...