STMicroelectronics SLLIMM-nano series of intelligent power modules (IPMs)

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STMicroelectronics has extended its SLLIMM-nano series of intelligent power modules (IPMs) for motor drives with more package options that help minimise overall size and complexity, as well as extra integrated features and efficiency leveraging the latest-generation 500 V MOSFETs.

With a current rating of 1 or 2 A, the IPMs target applications up to 100 W, such as refrigerator compressors, washing-machine or dishwasher motors, draining and recirculation pumps, fans and other drives running at less than 20 kHz in hard-switching circuitries. Operation up to 150°C allows use in harsh environments.

The modules integrate a three-phase MOSFET bridge and gate-driver HVICs, with features including an unassigned op-amp and comparator for functions such as overcurrent protection and current sensing. Built-in safety features include interlocking to prevent shoot-through currents from damaging MOSFETs of the bridge, a fault-status output, shutdown input and smart-shutdown capability. An optional built-in thermistor helps simplify overtemperature protection.

In addition to the zig-zag lead option, the series is also available in a line-lead package. These give designers extra flexibility to simplify the board layout and minimise controller size in mechatronic assemblies and other space-constrained applications.

The low MOSFET on-resistance of 3.6 and 1.7Ω, in 2 and 1 A variants, respectively, combines with low switching losses to ensure high energy efficiency. The MOSFETs have separate open-emitter connections to module pins, which simplifies use of three-shunt current sensing for field-oriented motor control (FOC) or single-shunt sensing for trapezoidal control. The modules also integrate the bootstrap diodes needed to control the high-side MOSFET gates, minimising demand for external components.

For more information: www.st.com/ipm.