Half-bridge power modules drive motors up to 300W

October 30, 2013 // By Graham Prophet
International Rectifier's highly integrated, ultra-compact, patent pending µIPM (micro-integrated-power-module) series now adds the IRSM808-105MH and IRSM807-105MH, for high efficiency appliance and light industrial applications with motor power up to 300W.

In an compact 8 x 9 x 0.9mm PQFN package, the half-bridge power modules offer up to a 60% smaller footprint than existing 3-phase motor control power ICs, IR says, to provide a compact heatsink-free solution for applications including compressor drives for refrigeration, pumps for heating and water circulation, air-conditioning fans, dishwashers, and automation systems.

The µIPM product family employs common pin-out and package size and incorporates rugged and efficient high-voltage FredFET MOSFET switches optimised for variable frequency drives, together with IR’s high-voltage driver ICs. It includes DC current ratings ranging from 2A to 10A and voltages of 250V and 500V. The modules' construction uses PCB copper traces to dissipate heat , providing cost savings through a smaller package design and eliminating the need for an external heat sink. By using standard packaging QFN technology, assembly is simplified by eliminating through-hole second pass assembly and improving thermal performance compared to traditional dual-in-line module solutions.

Both the new modules are rated at 500V and 10A DC output (at 25C) (max), delivering 1.1A to a motor if not heatsinked, or 1.3A with a heatsink, for motor power of 285/390W. (Motor currents are RMS, with Fc=16 kHz, 2-phase PWM operation, ∆TCA=70°C, TA ≈ 25°C) Three of the modules used together will provide a full inverter configuration. They are priced at $1.44 (10,000).

International Rectifier; www.irf.com