Overview
The AMIS-30512C5122G is a micro-stepping stepper motor driver designed for bipolar stepper motors. It is part of the AMIS-30512 series from ON Semiconductor and is connected through I/O pins and a SPI interface with an external microcontroller. This driver is implemented in I2T100 technology, enabling both high-voltage analog circuitry and digital functionality on the same chip. It is fully compatible with automotive voltage requirements and is suited for general-purpose stepper motor applications in automotive, industrial, medical, and marine environments.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Remark/Test Conditions |
|---|---|---|---|---|---|
| VBB (Nominal Operating Supply Range) | 6 | - | 30 | V | - |
| IBB (Total Current Consumption) | - | 8 | - | mA | Unloaded Outputs |
| VDD (Logic Supply Output Voltage) | 4.75 | 5 | 5.25 | V | - |
| ILoad (Maximum Output Current) | - | - | 50 | mA | 8 V ≤ VBB ≤ 30 V |
| Ttw (Thermal Warning) | 138 | 145 | 152 | °C | - |
| Ttsd (Thermal Shutdown) | - | - | Ttw + 20 | °C | - |
| fPWM (PWM Frequency) | 20.8 | 22.8 | 24.8 | kHz | Frequency Depends Only on Internal Oscillator |
Key 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
- Digital IO’s Compatible with 3.3 V and 5 V Microcontrollers
- Integrated 5 V Voltage Regulator to Supply an External Microcontroller
- Integrated Reset Function to Reset External Microcontroller
- Integrated Watchdog Function
Applications
The AMIS-30512C5122G is ideally suited for general-purpose stepper motor applications in various environments, including:
- Automotive
- Industrial
- Medical
- Marine
Q & A
- What is the AMIS-30512C5122G used for?
The AMIS-30512C5122G is a micro-stepping stepper motor driver for bipolar stepper motors.
- What is the operating voltage range of the AMIS-30512C5122G?
The nominal operating supply range is from 6 V to 30 V.
- How many step modes does the AMIS-30512C5122G support?
It supports seven step modes from full-step up to 32 micro-steps.
- What interface does the AMIS-30512C5122G use for communication with an external microcontroller?
The AMIS-30512C5122G uses a SPI interface for communication with an external microcontroller.
- Does the AMIS-30512C5122G have integrated current sensing?
- What is the purpose of the Speed and Load Angle Output?
The Speed and Load Angle Output allows for the creation of stall detection algorithms and control loops to adjust torque and speed based on load-angle.
- Does the AMIS-30512C5122G have thermal protection features?
- Is the AMIS-30512C5122G compatible with automotive voltage requirements?
- What type of PWM algorithm does the AMIS-30512C5122G use?
- Does the AMIS-30512C5122G have integrated voltage regulation for external microcontrollers?
