The EQ core design is derived from the ER and PQ. The range is optimized for use in compact AC/DC notebook adapters and DC/DC converters. For instance, the EQ30 has the capability to handle a power range of 50 to 70 W (fl yback topology) in an enclosed casing of a notebook adapter or 100 to 150 W in low profi le DC/DC converter . The advantages of EQ cores are a simple core shape, round centre pole, high Ae value , a large winding window, low profi le and a large surface area for heat dissipation.