We take your privacy very seriously, please agree to all cookies used when you visit our website. More information about the processing of personal data could be found inPrivacy Policy
2024/06/26
2024/06/26
2024/06/13
2024/06/03
As intelligent electric vehicles swiftly gain popularity, advanced features such as adaptive headlights, centralized thermal management systems and HUD head-up displays are gradually becoming basic configurations. This trend has also led to a rapid increase in the demand for stepper motor drivers among automotive tiers and OEMs.
Addressing the escalating demand for stepper motor applications in EV, NOVOSENSE has introduced a new automotive-grade programmable stepper motor driver, NSD8381-Q1. The NSD8381 is specially designed for stepper motor driver of headlight stepper motor, HUD adjustment motors, HVAC EXV(Electronic Expansion Valve) and flap motors , with excellent performance and stability.
Features of NSD8381-Q1
- Wide operating voltage: 4.5V-36V ((maximum 40V)
- Current up to 1.35A, Rdson (HS+LS): 1.2Ω
- Programmable micro-stepping, up to 1/32 micro-stepping mode
- Four programmable decay modes:Slow Decay, Mixed Decay,Auto Decay 1,Auto Decay 2
- IO direct control of clock/direction/hold, or direct half-bridge control
- Integrated current sensor and controller. Support 16-level (4-bit) current configuration for motor running and holding
- Support PWM frequency spread spectrum for EMC performance optimization
- Support slew rate and dead time configuration
- 24-bit, 4Mhz SPI communication
- Ultra-low consumption sleep mode
- Integrated BEMF detection for sensorless stall detection
- Support Vbat undervoltage lockout (VSUV), overcurrent protection (OCP), temperature warning(OTW/UTW) and overtemperature protection (OTSD)
- Support open-circuit diagnosis and protection of load
- Working temperature: Tj=-40°C~150°C
- Package: VQFN40, VQFN32
- AEC-Q100 qualified
Functional block diagram of NSD8381-Q1
NSD8381-Q1 is an automotive grade integrated driver for bipolar stepper motors capable of current controlled micro-stepping with programmable amplitude. It features SPI ,PWM frequency spread spectrum, sensorless stall detection ,and temperature warning & shutdown to support for flexible and reliable stepper motor control.
Precision Smooth stepper motor control
Highly suitable for high-precision stepper control applications in NEV such as headlight stepper, EXV(Electronic Expansion Valve), HUD adjustment motors and flap motors.
NSD8381-Q1 is optimized for precision and smooth stepper control and EMC issue. covering various aspects such as micro-stepping mode, decay mode, current loop control, PWM frequency adjustment and slew rate configurate of power stage, ensuring motors run smoothly and accurately with excellent EMC performance.
NSD8381-Q1 supports programmable micro-stepping modes, up to 1/32 micro-stepping and offers 4 decay modes (Auto Mixed decay mode 1, Auto mixed decay mode 2, slow decay mode and mixed decay mode), allowing for flexible matching of fast/slow/mixed decay modes within the current rise and fall periods . integrated current detection eliminates sample resistor. 16-step (4-bit) current configurations are available to control hold and running currents separately. PWM frequency spread spectrum and slew rate configuration are supported for optimized EMC performance of motors.
Fully independent 4- Channel half-bridge control
Flexible support for various types of loads
NSD8381-Q1 can be configured as four independent half-bridge enabling the driving of inductive and resistive loads, such as DC motors, LEDs, etc.
NSD8381-Q1, application diagram of driving stepper motor and 2-DC motors
Sensorless stall detection & protection
Real-time monitoring of stall and speed loss to protect load operation
During stepper motor is running, there is a specific relationship between the BEMF and the phase current, which can reflect the running state of the stepper motor. NSD8381-Q1 equipped with a BEMF detection module for motors, which samples the motor's BEMF at the current zero-crossing in each cycle. By comparing the BEMF voltage with the configurated threshold voltage, the motor's running state can be detected.
stall - current zero-crossing and BEMF waveform
running - current zero-crossing and BEMF waveform
Full-Function Protection
Integrated full-featured protection and load detection
NSD8381-Q1 integrates full-featured protection support for bus undervoltage lockout (VSUV), overcurrent protection (OCP), temperature warning (OTW/UTW), and overtemperature protection (OTSD), and supports open-circuit diagnosis and protection of loads. All protection features are not only precisely readable via SPI, but the NSD8381-Q1 is also designed with output pins which can map fault outputs, enabling the MCU to respond to faults efficiently.
Compact Package
Highly integrated to save PCBA areaNSD8381-Q1 offers two packag options, VQFN40 (6mm x 6mm) and VQFN32 (5mm x 5mm), with smaller sizes to help customers achieve higher integration of PCBA and BOM costs.
Thank you for your inquiry.
Please provide the following information and we will contact you as soon as possible, thank you.
