ST's STSPIN820 is a stepper motor driver with integrated control logic and low RDSon power stage. The controller uses PWM current control with fixed OFF time. The micro step resolution is up to 1/256 steps. The working voltage is 7-45V, the maximum. Output current 1.5Arms, RDSon HS+LS=1Ω (typical), mainly used in 3D printers, medical equipment, office and home automation, POS, robotics, ATM and cash handling equipment, CCTV, textile machinery, security cameras and industrial 2D Printers, etc. This article introduces the main features of STSPIN820, block diagram, application circuit, and motor drive expansion board X-NUCLEO-IHM14A1 main features, circuit diagram and bill of materials.
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, overtemperature and short-circuit protection.
Main features of STSPIN820:
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 application:
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
Figure 1. STSPIN820 block diagram
Figure 2. Typical application circuit for STSPIN820
Motor drive expansion board 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.
Motor drive expansion board X-NUCLEO-IHM14A1 main features:
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
Figure 3. Outline drawing of the motor drive expansion board X-NUCLEO-IHM14A1
The X-NUCLEO-IHM14A1 expansion board for STM32 Nucleo is a stepper motor driver covering a wide range of applications.
Figure 4. Motor Drive Expansion Board X-NUCLEO-IHM14A1 Circuit Diagram Motor Drive Expansion Board X-NUCLEO-IHM14A1 Bill of Materials:
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