BI Technologies’ Dual Winding Inductor Deployed in GPS Systems and Handheld Devices

“The HM78D can be configured as an inductor, common mode choke or DC/DC converter, and functions as a high inductance, high efficiency part in all configurations,” said Donna Schaefer, application engineering manager for TT electronics’ BI Technologies. “The complete package—rugged, low profile, current handling capabilities, versatility and cost—make it ideal for consumer electronics, including GPS systems and battery-operated handheld devices, such as cell phones.”

The surface mount inductor is also specified for use in SEPIC (single ended primary inductor converter) applications, as well as CD and DVD players, and digital cameras.

The HM78D inductor can be configured as two single inductors connected in series or parallel; or as a 1:1 transformer. The inductor features rated current inductance values ranging from 1.176µH to 4036µH when connected in series, and 0.33µH to 1000µH when connected in parallel. Maximum DC resistance ranges from 0.0295Ω to 15.6Ω, and 0.0074Ω to 3.89Ω, respectively. In series, rated current ranges from 0.135A to 3.6A, with a saturation current from 0.16A to 9.18A. In parallel, rated current ranges from 0.27A to 7.4A, with a saturation current from 0.31A to 18.4A. Operating temperature ranges from -40°C to +125°C. Custom devices are also available.