STSPIN L6474 ST motor drivers are moving the future

PublishTime：2022-07-30

●The device integrates analog circuitry and a dual full-bridge power stage making it a stand-alone solution for stepper motor driving applications.
●L6474 characteristics
■Supply voltage from 8 to 45 V
■Power stage
▲3 ARMS
▲RDS(ON)= 0.28 Ω
■Integrated current sensing(no external shunt)
■Up to 16 microsteps
■Advanced current control3
■8-bit 5 MHz SPI interface(Daisy-chain compatible)
■Integrated 16 MHz oscillator
■Integrated 5-bit ADC
■Integrated 3 V voltage regulator
■Overcurrent, over temperatureand undervoltage protections
■HTSSOP and POWERSO packages
●The fast SPI interface withdaisy-chaincapability allows a singleMCU to manage multiple devices
●Programmable alarm FLAGopen-drain output for interrupt-based FWIn daisy-chain configuration, FLAGpins of different devicescan be OR-wired to save host controller GPIOs
●STCK and DIR inputs allow fullcontrol of the motion of the motorby the MCU
●SYNC signal gives feedback of thestep-clock to the MCU(programmable # of microsteps)
●Step-clock and direction control allows performing any motion profile with no limitations
●The power stage can be enabled and disabledthrough two specific SPI commands:
■Enable: turns on the power stage and starts the current control according to the current EL_POS value.If a failure condition is present (overtemperature, overcurrent, etc.),the power stage is kept disabled.
■Disable: immediately turns off the power stage.
●Automatic selection of the decay modeStable current control in microstepping
●Slow decay and fast decay balancingReduced current ripple
●Programmable overcurrent protection
■Each MOSFETof the power stage is protected by an overcurrent protection system.
■The overcurrent threshold can be programmed from 375 mA to 6 A.
■When the current in one of the MOSFET exceeds the threshold, the whole power stage is immediately turned OFF.
■The power stage cannot be enabled until a Get Status command releases the failure condition.
●Current sensing
■The device integrates a non-dissipative current sensing on each MOSFET.
■The overcurrent protectionis performed measuring the current in each MOSFET.
■The current control is performed using the low-side MOSFETs current value.
●The device integrates a diagnostic register collecting the information about the status of the system:
■Power stage enabled/disabled
■Overcurrent
■Thermal status
■Undervoltage(it also indicates the power-up status)
■Incorrect or not performable command received
●Programmable output slew-rate
■Four output slew-rate values can be selected via SPI in order to fit the application EMI / Power dissipation tradeoff.
●Competitive advantages
■High level of integration
■Integrated current sensing
■Advanced diagnostics

Brand of Product：	ST
Part#：	STSPIN L6474 More Part#
Product Category：	full-digital interface 、 motor drivers 、 Diagnostic register More
Application：	[ stepper motor driving applications ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2017/11/21
Version Number：
Data Encoding：
Data Size：	845 KB

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