LV8726TA Stepper Motor Pre-Driver, PWM, Constant-Current Control, Micro step Overview The LV8726 is a bipolar stepper motor driver with ultra-small micro step drive capability. The device uses external dual H-bridges consisting of P and N www.onsemi.com channel MOSFETs. The operation voltage range is from 9V to 55V, and it is applicable to various industrial applications. Synchronous rectification control is implemented for all H-bridges to minimize power dissipation during a MOSFET switching. The device implements constant-current control using PWM. The step advance sequencer covers from half step to 1/128 micro step, and is driven by a clock input. The configuration registers can be programmed through an SPI serial interface. 48-pin TQFP with exposed pad To enhance energy efficiency further, the device can be put into a power saving 7 mm x 7 mm standby mode. MARKING DIAGRAM Features H-bridge gate drivers o For bipolar stepper motor XXXXXXXXXX XXXXXXXXXX o Clockwise(CW) and Counter-clockwise(CCW) direction control AWLYYWWG o Built-in step vector, selectable number of step resolutions from 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 32, 36, 50, 64, 100 and 128 o Constant-current control 1 o Synchronous rectification to reduce power dissipation XXXXX = Specific Device Code Single clock input to advance the excitation step A = Assembly Location Low power 1A(max) standby mode WL = Wafer Lot YY = Year Separate power supplies for control logic (3.3-5V) and motor drivers ( 9V WW = Work Week 55V) G= PbFree Package SPI 8-bit 3-wire serial interface for system configuration Input pins for standby and active mode ORDERING INFORMATION Built-in system protection features such as: o Under-voltage Ordering Code: o Over-current LV8726TA-NH o Over-temperature Package TQFP48 EP Typical Applications (Pb-Free / Halogen Free) Textile machines Shipping (Qty / packing) Packing machines 1000 / Tape & Reel Large printers Engraving machines For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Industrial products Packaging Specifications Brochure, BRD8011/D. LV8726TA BLOCK DIAGRAM Figure 1. Block Diagram www.onsemi.com 2