PBD3517-1

February 1999 PBD 3517/1 Stepper Motor Drive Circuit Description PBD 3517/1 is a bipolar, monolithic, integrated circuit, intended to drive a stepper motor in a unipolar, bilevel way. One PBD 3517/1 and a minimum of external components form a complete control and drive unit for LS-TTL- or microprocessor-controlled stepper motor system for currents up to 500mA. The driver is suited for applications requiring least-posssible RFI. Motor performance can be increased by operating in a bilevel drive mode. This means that a high voltage pulse is applied to the motor winding at the beginning of a step, in order to give a rapid rise of current. Key Features Complete driver and phase logic on chip 2 x 350 mA continuous-output current Half- and full-step mode generation LS-TTL-compatible inputs Bilevel drive mode for high step rates Voltage-doubling drive possibilities Half-step position-indication output Minimal RFI 16-pin plastic DIP package or 16 pin small outline wide body VCC VSS PQR LB STEP PB2 INH OA OB PA2 PA1 GND 16-pin plastic DIP 16-pin SO (wide body) Figure 1. Block diagram. 1 P B HSM PB PB1 D 35 17 DIR Phase Logic PA P B RC Mono F-F LA D /1 35 17 /1 PBD 3517/1 PBD 3517/1 Maximum Ratings Parameter Pin No. Symbol Min Max Unit Voltage Logic supply Second supply Logic input Current Phase output Second-level output Logic input The zero output Temperature Operating junction temperature Storage temperature 16 15 6, 7, 10, 11 1, 2...