The 33991 is a monolithic IC consisting of four dual output H-Bridge coil drivers and their associated control and management logic. It is used for driving low-power 2-phase bipolar stepper motors in automotive gauge clusters, mirror positioning, headlight leveling, tachograph, multimedia applications, and digital clocks.
The MC33991 is a SPI‑controlled dual stepper motor driver IC that integrates four dual‑output H‑Bridge drivers and full motion‑control logic. It offers analog microstepping, low EMI, and built‑in protection for fault detection, making it suitable for applications such as automotive gauges, mirror positioning, and headlight leveling.
The device operates from a 0‑5 V supply, consumes as little as 30 mA IDD, and works across a temperature range of –40 °C to 125 °C. Its 16‑bit SPI interface simplifies integration with microcontrollers, while internal calibration and low‑sleep‑mode current reduce system cost and component count. This manual is written in Chinese.
| Interface | 16‑bit SPI |
|---|---|
| Operating Temperature | -40 °C to 125 °C |
| Supply Current (IDD) | 30 mA |
| Microstepping | Analog microstepping for low EMI |
| Protection | Fully protected against faulted motors |
Yes, the MC33991 is designed for use with a simple microcontroller via its 16‑bit SPI interface.
The IC features low sleep‑mode current and a typical IDD of only 30 mA, reducing power consumption.
The MC33991 uses a 16‑bit SPI bus, providing a straightforward connection to a microcontroller.