Preliminary datasheet for the Motorola MC33991, a dual stepper motor gauge driver IC with SPI control and air core emulation.
The Motorola MC33991 is a single packaged, Serial Peripheral Interface (SPI) controlled, dual stepper motor gauge driver Integrated Circuit (IC). This monolithic IC consists of four dual output H-Bridge coil drivers and the associated control logic. Each pair of H-Bridge drivers is used to automatically control the speed, direction and magnitude of current through the two coils of a 2-phase instrumentation stepper motor. The device is ideal for use in automotive instrumentation systems requiring distributed and flexible stepper motor gauge driving.
| Power Input Supply Voltage Range | 6.5—26.0 V |
|---|---|
| Logic Supply Voltage Range | 4.5 5.0 5.5 V |
| Maximum Pointer Speed | 400 deg/s |
| Maximum Pointer Acceleration | 4500 deg/s2 |
| Output Current Limit | 40 100 170 mA |
It is a dual stepper motor gauge driver integrated circuit designed for automotive instrumentation systems.
It uses a fully integrated pointer movement and position state machine with air core movement emulation.
The maximum pointer velocity is 400 degrees per second.