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AMIS30421C4211RG Datasheet(PDF) 1 Page - ON Semiconductor |
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AMIS30421C4211RG Datasheet(HTML) 1 Page - ON Semiconductor |
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1 / 41 page  © Semiconductor Components Industries, LLC, 2011 October, 2011 − Rev. 0 1 Publication Order Number: AMIS−30421/D AMIS-30421 Micro-Stepping Stepper Motor Bridge Controller Introduction The AMIS−30421 is a micro -stepping stepper motor bridge controller for large current range bipolar applications. The chip interfaces via a SPI interface with an external controller in order to control 2 external power NMOS H−bridges. It has an on -chip voltage regulator, current sensing, self adapting PWM controller and pre -driver with smart slope control switching allowing the part to be EMC compliant with industrial and automotive applications. It uses a proprietary PWM algorithm for reliable current control. The AMIS−30421 contains a current translation table and takes the next micro -step depending on the clock signal on the “NXT” input pin and the status of the “DIR” (direction) register or input pin. The chip provides a so -called “Speed and Load Angle” output. This allows the creation of stall detection algorithms and control loops based on load angle to adjust torque and speed. The AMIS−30421 is implemented in a mature technology, enabling fast high voltage analog circuitry and multiple digital functionalities on the same chip. The chip is fully compatible with automotive voltage requirements. The AMIS−30421 is easy to use and ideally suited for large current stepper motor applications in the automotive, industrial, medical and marine environment. With the on−chip voltage regulator it further reduces the BOM for mechatronic stepper applications. Key Features • Dual H−Bridge Pre−Drivers for 2−Phase Stepper Motors • Programmable Current via SPI • On−chip Current Translator • SPI Interface • Speed and Load Angle Output • 8 Step Modes from Full Step up to 64 Micro−Steps • Current−Sense via Two External Sense Resistors • PWM Current Control with Automatic Selection of Fast and Slow Decay • Low EMC PWM with Selectable Voltage Slopes • Full Output Protection and Diagnosis • Thermal Warning and Shutdown • Compatible with 3.3 V Microcontrollers • Integrated 3.3 V Regulator to Supply External Microcontroller • Integrated Reset Function to Reset External Microcontroller • These Devices are Pb−Free and are RoHS Compliant* *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. See detailed ordering and shipping information in the package dimensions section on page 40 of this data sheet. ORDERING INFORMATION http://onsemi.com QFN44 CASE 485BY MARKING DIAGRAM 144 AMIS30421 0C421−001 AWLYYWWG 1 A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb−Free Package |
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