步进电机驱动器,带综合诊断反馈和 SLA 输出

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NCV70521 是一款微步步进电机驱动器,适合双极步进电机。该芯片通过 IO 引脚和 SPI 接口与外部微处理器进行联接。NCV70521 包含一个电流转换表,根据 NXT 输入引脚上的时钟信号以及 DIR(方向)寄存器或输入引脚的状态采用下一个微步进。芯片提供所谓速度和负载角度输出。因此可以基于负载角度创建失速检测算法和控制环路,来调整扭矩和速度。它采用专属 PWM 算法来实现可靠的电流控制。NCV70521 采用 I2T100 技术,在同一芯片上同时实现了高压模拟电路和数字功能。芯片可完全兼容汽车电压要求。The NCV70521 非常适合汽车环境中的通用步进电机应用。

  • Automotive headlight position
  • Flap/valve control in engine management
  • Folding displays
  • HVAC and LPG expansion valves
  • Dual H-Bridge for 2 phase stepper motors
  • Programmable peak-current up to 1.5 A using a 5-bit current DAC
  • On-chip current translator
  • SPI interface
  • Speed and load-angle output
  • 7 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 shut-down
  • Compatible with 5V and 3.3V microcontrollers

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AMIS30521C5212RG

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NQFP-32

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260

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2500

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6

40

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