CS3717A Datasheet | Cherry Semiconductor Corporation

Description The CS3717A controls and drives one phase of a bipolar stepper motor with chopper control of the phase current. Current levels may be selected in three steps by means of two logic inputs which select one of three current parators. When both of these inputs are high the device is disabled. A separate logic input controls the direction of current flow. A monostable, programmed by an external RC network, sets the current decay time. The power section is a full H-bridge driver with four internal clamp diodes for current recirculation. An external connection to the lower emitters is available for the insertion of a sensing resistor. Two CS3717AÕs and several external ponents form a plete stepper motor drive subsystem. The remended operating ambient temperature range is from 0 to 70¡C. The CS3717A is supplied in a 16 lead PDIP. Features s Full/Half /Quarter Step Operation s Output Current Up to 1 A s Motor Supply Voltage 10V to 46V s Integrated Bootstrap Lowers Saturation Voltage s Built In Protection Diodes s Externally Selectable Current Level s Digital or Analog Control of Output Current Level s Thermal Overload Protection s Minimum External ponents Absolute Maximum Ratings Power Supply Voltage (VDDA, VDDB) 50V Logic Supply Voltage (VCC) 7V Logic Input Voltage (IN0, IN1, DIRECTION) 6V parator Input VCC Reference Input Voltage 15V Output Current (DC Operation) 1.2A Storage Temperature Ð55¡C to +150¡C Operating Junction Temperature...