ICs eliminate need for many external components
1 min read
Two new integrated driver ics could drive high current motors with a reduced component count and board space says On Semiconductor.
The company's new AMIS-30532 and AMIS-30542 micro stepping stepper motor drivers are said to have high current capabilities with integrated H bridges and, according to On Semi, are suitable for motion control designs in a wide range of applications.
The AMIS-30542 mixed-signal motor driver ICs are designed to provide high accuracy and reliable motor control and deliver maximum current outputs of 2.2A continuous and 5.A peak. Each device integrates smart motor control capability with voltage regulation, on board current sensing and a number of protection and diagnostic functions.
According to On Semi, this level of integration eliminates the need for external switches and sense resistors. The on board speed and load angle feedback allows removing end of line switches and hall sensors on applications ranging from surveillance cameras, robotics to printers, industrial automation equipment and textile machines.
The new ICs feature two embedded H bridges and connect to a host microcontroller via an SPI interface and dedicated I/O pins. Each chip provides speed and load angle output, which allows for the control of motor torque and speed as well as the creation of stall detection algorithms. Seven step modes can be configured, from full step to 32 microsteps. An on chip current translator is used to calculate the appropriate PWM current based on the clock signal at the 'NXT' input pin and the status of the direction register or input pin. The PWM current control includes automatic selection of fast and slow decay modes.
Guido Remmerie, director motion control and energy management products at ON Semiconductor, said: "Combining high accuracy speed and torque control with higher integrated current capability is addressing a broader range of motors and emerging applications while saving space and reducing component count."
Both the AMIS-30532 and AMIS-30542 are compatible with 5 and 3.3V microcontrollers, while the integrated voltage regulator can be used to provide microcontroller power.
