ST公司的STSPIN820是集成了控制邏輯和低RDSon功率級的步進馬達驅動器,控制器采用有固定OFF時間的PWM電流控制,微步距分辨率高達1/256步.工作電壓7-45V,最大輸出電流1.5Arms,RDSon HS+LS=1Ω(典型),主要用在3D打印機,醫療設備,辦公和家庭自動化,POS,機器人,ATM和現鈔處理設備,CCTV,紡織機械,安全照相機和工業2D打印機等.本文介紹了STSPIN820主要特性,框圖,應用電路,以及馬達驅動擴展板X-NUCLEO-IHM14A1主要特性,電路圖和材料清單.

The STSPIN820 is a stepper motor driver whichintegrates, in a small QFN 4 x 4 mm package,both control logic and a low RDSon power stage.

The integrated controller implements a PWMcurrent control with fixed OFF time and a microstepping resolution up to 1/256th of the step.

The device can be forced into a low consumptionstate.The device offers a complete set of protectionfeatures including overcurrent, overtemperatureand short-circuit protection.

STSPIN820主要特性:

?Operating voltage from 7 to 45 V
?Maximum output current 1.5 Arms
RDSon HS + LS = 1 Ω typ.
?Microstepping up to 1/256th of step
?Current control with programmable OFF time
?Current sensing based on external shuntresistor
?Full protection set
?Non-dissipative overcurrent protection
Short-circuit protection
?Undervoltage lockout
?Thermal shutdown
Standby low consumption

STSPIN820應用:

3D printers
?Medical equipment
?Industrial 2D printers
?Textile and sewing machines
?CCTV, security and dome cameras
ATM and cash handling machines
Office and home automation
?POS
Robotics

圖1.STSPIN820框圖

圖2.STSPIN820典型應用電路

馬達驅動擴展板X-NUCLEO-IHM14A1

The X-NUCLEO-IHM14A1 motor driver expansion board is based on the STSPIN820 monolithic driver for stepper motors.
It represents an affordable, easy-to-use solution for driving stepper motors in your STM32 Nucleo project, implementing motor driving applications such as 2D/3D printers, robotics and security cameras.
The STSPIN820 implements a PWM current control with constant OFF time adjustable via an external resistor and a microstepping resolution up to the 256th step.
The X-NUCLEO-IHM14A1 expansion board is compatible with the Arduino UNO R3 connector and the ST morpho connector, so it can be plugged to the STM32 Nucleo development board and stacked with additional X-NUCLEO expansion boards.

馬達驅動擴展板X-NUCLEO-IHM14A1主要特性:

Operating voltage: 7 to 45 V
Output current up to 1.5 Arms
Fine tuning microstepping up to the 256th step
Current control with adjustable OFF time
Full protection set:
Overcurrent protection
Short-circuit protection
Under voltage lock out
Thermal shutdown
Compatible with Arduino UNO R3 connector
Compatible with STM32 Nucleo boards
RoHS compliant

圖3.馬達驅動擴展板X-NUCLEO-IHM14A1外形圖
The X-NUCLEO-IHM14A1 expansion board for STM32 Nucleo is a stepper motor driver covering a wide range of applications.

圖4.馬達驅動擴展板X-NUCLEO-IHM14A1電路圖
馬達驅動擴展板X-NUCLEO-IHM14A1材料清單: