LV8726TA

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 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. To enhance energy efficiency further, the device can be put into a power saving standby mode. Features  H-bridge gate drivers o For bipolar stepper motor o Clockwise(CW) and Counter-clockwise(CCW) direction control 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 o Synchronous rectification to reduce power dissipation  Single clock input to advance the excitation step  Low power 1μA(max) standby mode  Separate power supplies for control logic (3.3-5V) and motor drivers ( 9V – 55V)  SPI 8-bit 3-wire serial interface for system configuration  Input pins for standby and active mode  Built-in system protection features such as: o Under-voltage o Over-current...