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, ,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 high power applications. They are designed to operate with a supply voltage ranging from 10.5 V to 85 V and mount eight STD25NF10 MOSFETs with a maximum current of 25 A r。m。s..

In combination with the STEVAL-PCC009V2 demonstration board and the SPINFamily evaluation tool, the boards provide a complete and easy to use evaluation environment allowing the user to investigate all the features of the L648x devices. Both the boards support the daisy chain configuration making them suitable for the evaluation of the devicesin multi motor applications.

图2.评估板EVAL6480H外形图
评估板EVAL6480H电性能指标:



图3.评估板EVAL6480H (1)

图4.评估板EVAL6480H (2)
评估板EVAL6480H材料清单:



图5.评估板EVAL6480H PCB设计图(顶层)

图6.评估板EVAL6480H PCB设计图(内层2)

图7.评估板EVAL6480H PCB设计图(内层3)

图8.评估板EVAL6480H PCB设计图(底层)
详情请见:
http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00056884.pdf
和http://www.st.com/st-web-ui/static/active/en/resource/technical/document/user_manual/DM00098818.pdf
以及http://www.st.com/st-web-ui/static/active/en/resource/technical/document/bill_of_materials/eval6480h_bom.pdf
和http://www、st、com/st-web-ui/static/active/en/r
esource/technical/layouts_and_diagrams/schematic_pack/eval6480h_schem.pdf

DM00056884.pdf
DM00098818.pdf
eval6480h_bom.pdf
eval6480h_schem.pdf