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步进运动引擎和SPI电机控制器L6480
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The L6480 device， realized in analog mixed signal technology， is an advanced fully integrated solution suitable for driving two-phase bipolar stepper motors with microstepping. It integrates a dual full bridge gate driver for N-channel MOSFET power stages with embedded non dissipative overcurrent protection. Thanks to a unique voltage mode driving mode which compensates for BEMF， bus voltage and motor winding variations， the microstepping of a true 1/128-step resolution is achieved. The digital control core can generate user defined motion profiles with acceleration， deceleration， speed or target position easily programmed through a dedicated register set. All application commands and data registers， including those used to set analog values （i.e. current protection trip point， deadtime， PWM frequency， etc.） are sent through a standard 5-Mbit/s SPI. A very rich set of protections （thermal， low bus voltage， overcurrent and motor stall） makes the L6480 device “bullet proof”， as required by the most demanding motor control applications.
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