ST L6480两相双极微步进马达驱动解决方案

ST公司的L6480采用模拟混合信号技术,集成了两路全桥N-MOSFET栅极驱动器,并嵌入了没有损耗的过流保护,工作电压7.5 V - 85 V,多达128微步距,非常适合两相双极微步进马达驱动.本文介绍了L6480主要特性,框图,以及评估板EVAL6480H特性和电性能指标,电路图,材料清单和PCB设计图.
The L6480 device, realized in analog mixedsignal technology, is an advanced fully integratedsolution suitable for driving two-phase bipolarstepper motors with microstepping.
It integrates a dual full bridge gate driver forN-channel MOSFET power stages withembedded non dissipative overcurrent protection.Thanks to a unique voltage mode driving modewhich compensates for BEMF, bus voltage andmotor winding variations,the microstepping ofa true 1/128-step resolution is achieved. Thedigital control core can generate user definedmotion profiles with acceleration, deceleration, speed or target position easily programmedthrough a dedicated register set. All applicationcommands and data registers, including thoseused to set analog values (i.e. current　protectiontrip point, deadtime, PWM frequency, etc.) aresent through a standard 5-Mbit/s SPI. A very richset of protections (thermal, low bus voltage,overcurrent and motor stall) makes the L6480device“bullet proof”, as required by the mostdemanding motor control applications.
L6480主要特性:

Operating voltage: 7.5 V - 85 V
Dual full bridge gate driver for N-channelMOSFETs
Fully programmable gate driving
Embedded Miller clamp function
Programmable speed profile
Up to 1/128 microstepping
Sensorless stall detection
Integrated voltage regulators
SPI interface
Low quiescent standby currents
Programmable non dissipative overcurrentprotection
Overtemperature protection

L6480应用:

Bipolar stepper motor

图1.L6480框图
评估板EVAL6480H
The EVAL6480H and EVAL6482H are two demonstration boards based on L648x devices implementing a complete stepper motor driver for h...