LV8714TA Dual Stepper Motor Driver with Ultra-small Micro Steps The LV8714 is a fully integrated dual bipolar/unipolar stepper motor driver with ultra-small micro step drive capability. Alternatively, it can be used to drive four www.onsemi.com DC motors independently. The device includes low R (upper + lower = DS(ON) 0.9 ) type MOSFETs based quad H-bridges with gate drivers and can drive up to 1.5A per H-bridge. Synchronous rectification control is implemented for all H-bridges to lower power dissipation during a MOSFET switching. The device implements constant-current control using PWM at 125 kHz (typ.) switching frequency that enables the least noise motor drive solution. A built-in linear regulator powers internal logic circuit directly from the motor supply voltage, V thus eliminating need for any external regulator. M, A proprietary internal current sensing mechanism is implemented that 48-pin TQFP with exposed pad 7 mm x 7 mm eliminates up to four external current sense power resistors and improves the system energy efficiency significantly. External V input signal for each REF H-bridge controls the drive step size and can achieve over 256 micro step MARKING DIAGRAM resolution. Individual controls signals (ENAx and INx) are provided for controlling each H-bridge channel independently with forward and reverse direction control. To enhance energy efficiency further, the device can be put XXXXXXXXXX into a power saving standby mode, when idle. XXXXXXXXXX AWLYYWWG Features 1 Integrated quad H-bridges with independent controls o Dual bipolar/unipolar stepper motor or quad DC motor drive XXXXX = Specific Device Code o Forward and reverse direction control A = Assembly Location WL = Wafer Lot Low R (upper + lower = 0.9 ) type MOSFETs DS(ON) YY = Year Proprietary internal current sensing WW = Work Week o Eliminates up to four external current sense power resistors G= PbFree Package inputs Over 256 micro step resolution with external V REF Single supply operation with a built-in internal regulator ORDERING INFORMATION No external component for driving internal MOSFETs Ordering Code: Constant-current control with 125 kHz (typ.) PWM switching frequency LV8714TA-NH Low power standby mode when idle Synchronous rectification to reduce power dissipation Package TQFP48 EP In-built system protection features such as: (Pb-Free / Halogen Free) o Under-voltage o Over-current Shipping (Qty / packing) o Over-temperature 1000 / Tape & Reel Typical Applications Surveillance Camera Stage light Scanner Printer Semiconductor Components Industries, LLC, 2014 1 Publication Order Number: November 2014- Rev. 2 LV8714TA/D LV8714TA BLOCK DIAGRAM Figure 1. LV8714TA Block Diagram www.onsemi.com 2