Overview
The NCV70624DW010R2G, produced by onsemi, is a single-chip micro-stepping motor driver with an integrated position controller and a control/diagnostic interface. This device is designed to simplify the construction of intelligent peripheral systems, allowing up to 32 drivers to be connected to a single I2C master, thereby reducing system complexity. It receives positioning instructions via the I2C bus and drives the stator coils of a two-phase stepper motor to achieve precise positioning. The on-chip position controller is configurable for different motor types, positioning ranges, and parameters such as speed, acceleration, and deceleration. The device supports micro-stepping, which enables silent motor operation and increased positioning resolution.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VBB) | 6.5 | - | 29 | V |
| Operating Temperature Range (TJ) | -40 | - | 165 | °C |
| Peak Current Through Motor Coil | - | - | 800 | mA |
| RMS Current Through Coil | - | - | 570 | mA |
| On Resistance for Each Motor Pin | 0.50 | 1 | 1.85 | Ω |
| I2C Clock Frequency (Standard Mode) | 100 | - | 400 | kHz |
| Charge Pump Frequency | 250 | - | - | kHz |
Key Features
- Micro-Stepping Technology: Allows for silent motor operation and increased positioning resolution.
- Sensorless Step-Loss Detection: Prevents the positioner from losing steps and stops the motor when running into stall.
- Peak Current Up to 800 mA: Supports high current requirements for motor operation.
- Fixed Frequency PWM Current-Control: Ensures stable and efficient current control.
- Selectable PWM Frequency: Allows for customization of PWM frequency based on application needs.
- Automatic Selection of Fast and Slow Decay Mode: Optimizes motor performance by automatically selecting the appropriate decay mode.
- No External Fly-back Diodes Required: Simplifies the circuit design by eliminating the need for external fly-back diodes.
- 14 V/24 V Compliant: Compatible with both 14V and 24V systems.
- Motion Qualification Mode: Enables verification of the complete mechanical system based on selected motion parameters.
- Position Controller with RAM and OTP Memory: Allows for configurable speeds, acceleration, and other parameters.
- I2C Interface: Bi-directional 2-wire bus for inter-IC control with field-programmable node addresses.
- Protection Features: Includes overcurrent protection, undervoltage management, open-circuit detection, high temperature warning, and low temperature flag.
Applications
The NCV70624DW010R2G is ideally suited for various applications across different industries, including:
- Automotive: Headlamp alignment, HVAC, idle control, cruise control.
- Industrial Equipment: Lighting, fluid control, labeling, process control, XYZ tables, robots.
- Building Automation: HVAC, surveillance, satellite dish, renewable energy systems.
These applications typically involve small positioning tasks, multiple axes, or mechatronic solutions where the driver chip is mounted directly on the motor.
Q & A
- What is the primary function of the NCV70624DW010R2G?
The primary function is to act as a single-chip micro-stepping motor driver with an integrated position controller and control/diagnostic interface.
- What is the maximum peak current the device can handle?
The device can handle a maximum peak current of 800 mA.
- What is the operating temperature range of the device?
The operating temperature range is from -40°C to 165°C.
- Does the device require external fly-back diodes?
No, the device does not require external fly-back diodes.
- What communication interface does the device use?
The device uses an I2C bi-directional 2-wire bus for inter-IC control.
- What protection features are included in the device?
The device includes overcurrent protection, undervoltage management, open-circuit detection, high temperature warning, and low temperature flag.
- Can the device be used in automotive applications?
- What is the purpose of the motion qualification mode?
The motion qualification mode enables verification of the complete mechanical system based on selected motion parameters.
- How many drivers can be connected to one I2C master?
Up to 32 drivers can be connected to one I2C master.
- What is the significance of sensorless step-loss detection?
Sensorless step-loss detection prevents the positioner from losing steps and stops the motor when running into stall, ensuring accurate position calibrations.
