Maximizing energy efficiency in equipment such as compressors, fans, and pumps

STMicroelectronics (ST) has launched additional package options for its new Intelligent Power Module (IPM) SLLIMM-nano, integrating components that can accelerate the development of motor drives ranging from low power up to 300W and simplify assembly.

The 3A and 5A modules feature advanced 600V super-junction MOSFETs to maximize energy efficiency in equipment such as compressors, fans, and pumps. Additionally, selecting inline or zig-zag lead-based packages optimizes space saving and ensures necessary pin separation. An optional built-in slot allows for the easy installation of inexpensive heatsinks. Furthermore, open-emitter outputs facilitate PCB routing for single or three-shunt current monitoring.

Each IPM includes a three-phase half-bridge composed of six MOSFETs and features a gate driver implemented as a high-voltage IC. Additionally, protection and fault prevention are simplified through further integrated functions, including a neutral OP-amp for current sensing, a comparator for high-speed fault protection, and an optional NTC (Negative Temperature Coefficient) thermistor for temperature monitoring. Bootstrap diodes are also integrated to reduce material costs and simplify the board layout. The smart-shutdown circuit protects the power switch, and UVLO (Under-Voltage Lockout) prevents malfunctions due to low Vcc or Vboot.

Superjunction MOSFETs maintain low on-resistance of 1.0Ω or 1.6Ω (max) at 25°C, and minimize conduction and switching losses through low capacitance and gate charge. This increases the efficiency of hard-switching circuits operating at up to 20kHz, including various industrial drives, and enables low-power applications to be driven without the use of heatsinks. Additionally, circuit design and layout can be further simplified by optimizing switching di/dt and dV/dt to achieve low EMI.

This new module supports an operating junction temperature of up to 150°C and provides insulation of up to 1500Vrms/min, and has obtained UL 1557 certification.