The new A4983 from Allegro MicroSystems is a compact DMOS microstepping motor driver IC with built-in translator circuitry for easy operation.
The device combines an easy-to-use step and direction interface with a high output capability of up to 35 V and ±2 A and high-resolution microstepping control. It is designed for the PWM (pulse-width modulation) control of bipolar stepper motors in full-, half-, quarter-, eighth- and sixteenth-step modes, and is targeted toward the office automation, industrial and medical markets.
The use of synchronous rectification reduces power dissipation and minimises the need for Schottky diodes, while the low-resistance DMOS outputs further limit power dissipation and allow higher average output currents because of the lower die temperature rise.
The built-in translator circuitry makes the A4983 easy to operate, and requires only two control lines. Simply inputting one pulse on the 'step' input drives the motor by one microstep. There are no phase sequence tables, high-frequency control lines, or complex interfaces to program, making the device an ideal fit for applications where a complex microprocessor is unavailable or overburdened.
The A4983 includes a fixed off-time current regulator, which has the ability to operate in slow or mixed decay modes. The chopping control in the A4983 automatically selects the current decay mode (slow or mixed). When a signal occurs at the 'step' input pin, the A4983 determines if that step results in a higher or lower current in each of the motor phases. If the change is to a higher current, then the decay mode is set to slow decay. If the change is to a lower current, then the current decay is set to mixed (set initially to a fast decay for a period amounting to 31,25% of the fixed off-time, then to a slow decay for the remainder of the off-time). This current decay control scheme results in reduced audible motor noise, increased step accuracy and reduced power dissipation.
Internal circuit protection includes thermal shutdown with hysteresis, under-voltage lockout (UVLO), and crossover-current protection. Special power-on sequencing is not required. A 'sleep' mode with a current consumption of only 10 μA is also available.
Ryzen-based computer on module Altron Arrow
AI & ML
SolidRun announced the launch of its new Ryzen V3000 CX7 Com module, configurable with the eight-core/16-thread Ryzen Embedded V3C48 processor.
Read more...Robust and customisable SBC Altron Arrow
DSP, Micros & Memory
Pairing the powerful i.MX8M Plus System on Module (SoM) from SolidRun, which features the i.MX 8M Plus SoC from NXP, this high-performance SBC is set to transform industrial environments.
Read more...New family supports future cryptography Altron Arrow
DSP, Micros & Memory
NXP has introduced its new i.MX 94 family, which contains an i.MX MPU with an integrated time-sensitive networking (TSN) switch, enabling configurable, secure communications with rich protocol support in industrial and automotive environments.
Read more...NXP’s all-purpose microcontroller series Altron Arrow
DSP, Micros & Memory
NXP has released its MCX A14x and A15x series of all-purpose microcontrollers which are part of the larger MCX portfolio that shares a common Arm Cortex-M33 core platform.
Read more...Non-terrestrial network module Altron Arrow
Telecoms, Datacoms, Wireless, IoT
Fibocom unveiled its MA510-GL (NTN), a non-terrestrial networks module which is compliant with 3GPP Release 17 standard.
Read more...Cellular IoT connectivity via satellite Altron Arrow
Telecoms, Datacoms, Wireless, IoT
The Telit Cinterion cellular LPWA module will enable satellite data communication using the NB-IoT protocol, without any special hardware changes required for the integration of the cellular module in the customer application.
Read more...Wine farm turns to solar installation for power Current Automation
Power Electronics / Power Management
Slanghoek Wine farm opted into a power purchase agreement to lower overall electricity costs and enter a true sustainable future, with a price-competitive edge on lower running costs.
Read more...Industrial PSU family Brabek
Power Electronics / Power Management
The RACPRO1 family of PSUs supports a universal DC input voltage range from 430 to 850 V DC, allowing the parts to support renewable energy and microgrid applications.
Read more...Integrated POL voltage regulators EBV Electrolink
Power Electronics / Power Management
Infineon’s TDA38807 and TDA38806 are their highest density high-efficiency integrated point-of-load (IPOL) solutions for smart enterprise systems.
Read more...Low noise 3-axis MEMS accelerometers Altron Arrow
DSP, Micros & Memory
The ADXL357 and ADXL357B from Analog Devices are digital outputs, low noise density, low 0 g offset drift, low power, three-axis accelerometers with selectable measurement ranges.
printer friendly version