L6219 STMicroelectronics

L6219 Stepper motor driver Features Able to drive both windings of bipolar stepper motor Output current up to 750 mA each winding Wide voltage range: 10 V to 46 V Half-step, full-step and microstepping mode PDIP24 (20+2+2) SO24 (20+2+2) Built-in protection diodes Internal PWM current control A cross conduction protection is provided to avoid Low output saturation voltage simultaneous cross conduction during switching Designed for unstabilized motor supply voltage current direction. Internal thermal shutdown An internal pulse-width-modulation (PWM) controls the output current to 750 mA with peak Description startup current up to 1 A. Wide range of current control from 750 mA (each The L6219 is a bipolar monolithic integrated bridge) is permitted by means of two logic inputs circuits intended to control and drive both winding and an external voltage reference. A phase input of a bipolar stepper motor or bidirectionally control to each bridge determines the load current two DC motors. direction. A thermal protection circuitry disables The L6219 with a few external components form a the outputs if the chip temperature exceeds safe complete control and drive circuit for LS-TTL or operating limits. microprocessor controlled stepper motor system. The power stage is a dual full bridge capable of sustaining 46V and including four diodes for current recirculation. Table 1. Device summary Part number Package Packing E-L6219 PDIP24 Tube E-L6219DS SO24 Tube E-L6219DS013TR SO24 Tape & reel September 2008 Rev 13 1/16 www.st.com 1Contents L6219 Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 Input logic (I0 and I1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2 Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 Current sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.4 Single-pulse generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.5 Output stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.6 VS, VSS, VRef . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3 Application informations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2/16