Low-power electric motors dissipate even less power

16th March 2016

Nat Bowers

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Expanding its Intelligent Power Module portfolio, STMicroelectronics has announced the SLLIMM-nano 2nd series, adding higher power levels and new package options that are especially suited to increasing the efficiency and reducing cost. The devices integrate three half-bridge high-voltage gate drivers, six IGBTs and six fast and ultra-soft freewheeling recovery diodes.

The SLLIMM-nano devices also integrate low-voltage input logic that allow the devices to implement the complete interface between a low-power MCU and a mains-powered three-phase electric motor. The design of the embedded IGBTs (a planar technology for the 3A and a dedicated TFS (Trench-gate Field Stop) technology for the 5A version) and the freewheeling diodes are tailored to offer the best trade-off between switching and conduction losses for low-power BLDC motor applications, resulting in high efficiency and low electromagnetic interference.

The SLLIMM-nano devices suit compressors, pumps and fans in domestic appliances, such as refrigerators and washing machines, and any low-power motors working up to 20kHz in hard-switching circuits in an application power range up to 200W.

Key features of ST’s SLLIMM-nano 2^nd series include:

3-5A current rating at +25°C, with 600V breakdown voltage;
Lower V_CE(sat) 1.65V even at 5A, due to the TFS technology;
Low EMI;
Mounted slot package options allowing easier and lower-cost heatsink assembly;
Integrated bootstrap diode for lower BOM and simplified PCB layout;
+150°C maximum operating junction temperature;
Integrated op amp and comparator that can be used for protection circuits;
Separate open emitter outputs to simplify PCB routing for both single and three shunt solutions;
NTC (Negative Temperature Coefficient) for temperature monitoring;
Smart shutdown function;
In-line and zig-zag lead options, with/without stand-off, for maximum layout flexibility; and
1,500V_rms minimum isolation.

The first members of ST’s SLLIMM-nano 2^nd series are available now with prices starting from $7.50 in volumes of 1,000 units. The devices are housed in N2DIP-26L packages with multiple lead options.