Global semiconductors specialist, ST Microelectronics has added two miniature motor drivers to its range of SLLIMM (Small Low-Loss Intelligent Moulded Modules), enabling domestic appliances to offer better energy ratings.
SLLIMM nano modules integrate complete motor control power stage as well as optional sensing and safety features to save over 30 components to cut design time, cost and size.
Mandatory in many countries and communities worldwide, energy marking and labelling schemes such as the ENERGY STAR and in-store energy rating labels allow consumers to identify energy efficient products in each price range.
Intelligent motor controllers provide the key to using less energy, while also enabling additional benefits such as new features and quieter operation in appliances such as dishwashers, refrigerators, air conditioners and fans.
ST’s new SLLIMM nano family extends the portfolio of SLIMM intelligent power modules for appliance motor drivers in a single module, connecting directly between the central microcontroller and the motor.
Compared to a conventional driver, which typically requires more than 30 individual components, ST’s modular solution reduces costs by simplifying design and significantly reducing component count while saving space, improving reliability and lowering electromagnetic emissions (EMI). The modules are also ideal for small built-in motor applications with limited assembly space.
The two variants, the STGIPN3H60 and STGIPN3H60A power modules are each housed in a 29.15 x 12.45mm package with 26 leads. Each module incorporates a complete three-phase half bridge including high-voltage gate drivers and IGBT power switches, plus freewheeling diodes and bootstrap diodes.
The bootstrap diodes supply high-voltage circuitry on the motor side as the driver module is starting up. Integrating it in the module delivers an additional saving in external components, and is achieved using a patented technique unique to ST.
While the STGIPN3H60A module provides basic motor-drive capabilities for price-sensitive applications, the STGIPN3H60 includes extra features such as an uncommitted op-amp, which engineers can use to feed back the sensed motor current to the microcontroller in a closed-loop Field-Oriented Control (FOC) system.
Additionally, the STGIPN3H60 features a comparator for use in over-temperature or over-current shutdown. The STGIPN3H60 also has a smart shutdown function capable of generating a simple fault indication or shutting the driver down safely within 200ns in an emergency.
Key features of STGIPN3H60/A power modules:
- 600V/3A IGBT rating
- Optimised for low electromagnetic interference
- Fixed, dead-time and interlocking function
- Under-voltage lockout
- Shutdown function
- Pin-out optimised to simplify board layout
- 1.57mm creepage distance between high and low voltage pins, meeting international safety standards for high-voltage devices