Rohm unveils 600V IGBT IPMs delivering low noise with low loss

ROHM has unveiled four 600V IGBT Intelligent Power Modules (IPMs) of its BM6437x series that are able deliver best-in-class low noise characteristics together with low loss.

The devices are intended for use in compact industrial equipment, such as small capacity motors for robots, as well as in home appliances – including air conditioners and washing machines.

ROHM's 4-model lineup of IGBT IPMs are able to deliver low noise with low loss by reducing both radiated noise and power loss. Optimising the built-in IGBT’s characteristics and soft recovery characteristics of the internal FRD (Fast Recovery Diode) allows the BM6437x series to decrease radiated noise by more than 6dB (at peak comparison) over standard products, making it possible to consider simplifying the noise filter that is typically required.

The low-loss IGBTs adopted in these IPMs reduce power consumption over ROHM’s conventional IPM products by 6% (fc=15kHz), achieving class-leading low loss, and contribute to a reduction in equipment power consumption.

In addition, these products dramatically improve the built-in temperature monitoring function, resulting in high ±2% accuracy (equivalent to 2°C). This makes it possible to consider eliminating the external thermistor required with existing high accuracy temperature monitors, reducing the number of external parts along with design load.

Furthermore, a new function for identifying the product after mounting has been added to help prevent mounting errors. Error identification mode has also been added. This integrated function is helping to distinguish the failure status by applying “Short Current Protection”, “Under Voltage Protection” or “Thermal Shutdown Protection”.