AMIS-30512: Microstepping Motor Driver
The AMIS-30512 is a micro-stepping stepper motor driver for bipolar stepper motors. The chip is connected through I/O pins and an SPI interface with an external microcontroller. It has an on-chip voltage regulator, reset-output and watchdog reset, able to supply peripheral devices. The AMIS-30512 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. It uses a proprietary PWM algorithm for reliable current control.The AMIS-30512 is implemented in I2T100 technology, enabling both high voltage analog circuitry and digital functionality on the same chip. The chip is fully compatible with the automotive voltage requirements.The AMIS-30512 is ideally suited for general purpose stepper motor applications in the automotive, industrial, medical, and marine environment.
Features- Dual H-bridge for 2-phase stepper motors
- Programmable peak-current up to 800 mA using a 5-bit current DAC
- On-chip current translator
- SPI interface
- Speed and load angle output
- Seven step modes from full-step up to 32 micro-steps
- Fully integrated current-sense
- PWM current control with automatic selection of fast and slow decay
- Low EMC PWM with selectable voltage slopes
- Active fly-back diodes
- Full output protection and diagnosis
- Thermal warning and shutdown
- Compatible with 3.3 V microcontrollers, 5.0 V tolerant inputs
- Integrated 5.0 V regulator to supply external microcontroller
- Integrated reset function to reset external microcontroller
- Integrated watchdog function
|
Applications- Pan, tilt, zoom motor control
- Integrated, local control mounted to motors
- Flaps and valves in building and process
- Positioning
| End Products- Security cameras
- Smart motors (integrated drivers)
- Sewing machines
- Building automation
- Pick-and-place, office equipment
|
Software (2)
Package Drawings (1)
| Document Title | Document ID/Size | Revision |
|---|
| SOIC-24 | 751AW (62.2kB) | revo |
Application Notes (3)
Evaluation Board Documents (7)
Data Sheets (1)
Evaluation/Development Tool Information
| Product | Status | Compliance | Short Description |
|---|
| AM305122R1DBGEVB | Active | Pb-free | Daughter Board SPI Stepper Driver Voltage Regulator SOIC Evaluation Board |
| AMIS305XXGEVK | Active | Pb-free | Industrial Stepper Motor Driver Evaluation Kit 305XX Family |
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| AMIS30512C5122RG | Active | Pb-free
Halide free | SOIC-24 | 751AW | 2 | Tape and Reel | 1500 | $2.53 |
Specifications
| Product | VM Min (V) | VM Max (V) | VCC Min (V) | VCC Max (V) | IO Max (A) | IO Peak Max (A) | Step Resolution | Control Type | Feedback Method | Current Sense | Regulator Output | Fault Detection | Flyback Protection | RDS(on) Typ (Ω) |
|---|
| AMIS30512C5122RG | 6 | 40 | | | 0.8 | 0.8 | 1/32 | SPI | Back EMF/Sensorless | Fully Integrated | Yes | Over-Current | Integrated Active | |
