L6506 L6506D CURRENT CONTROLLER FOR STEPPING MOTORS DESCRIPTION The L6506/D is a linear integrated circuit designed to sense and control the current in stepping motors and similar devices. When used in conjunction with the L293, L298, L7150, L6114/L6115, the chip set forms a constant current drive for an inductive load and performs all the interface function from the con- trol logic thru the power stage. DIP18 SO20 Two or more devices may be synchronized using ORDERING NUMBERS: the sync pin. In this mode of operation the oscillator L6506 L6506D in the master chip sets the operating frequency in all chips. BLOCK DIAGRAM (pins number referred to DIP-18) July 2003 1/8L6506 -L6506D PIN CONNECTIONS (top view) DIP18 SO20 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V Supply Voltage 10 V CC V Input Signals 7 V i P Total Power Dissipation (T = 70C) for DIP18 1 W tot amb 0.8 W Total Power Dissipation (Tamb = 70C) for SO20 T Junction Temperature 150 j C T Storage Temperature -40 to 150 stg C THERMAL DATA Symbol Parameter DIP18 SO20 Unit R Thermal Resistance Junction-ambient Max. 80 100 th j-amb C/W ELECTRICAL CHARACTERESTICS (V = 5.0V, T = 25C unless otherwise noted) CC amb Symbol Parameter Test Conditions Min. Typ. Max. Unit V Supply Voltage 4.5 7 V CC I Quiescent Supply Current V = 7V 25 mA CC CC COMPARATOR SECTION Symbol Parameter Test Conditions Min. Typ. Max. Unit V Input Voltage Range V Inputs 0.3 3 V IN sense V Input Offset Voltage V = 1.4V mV IO IN 5.0 I Input Offset Current nA IO 200 I Input Bias Current 1 A IB Response time V = 1.4V V = 0 to 5V 0.8 1.5 s REF SENS 2/8