Camarillo, Calif.—Power-One's F4804A input filter for minimizing the conducted and radiated emissions from DC/DC switchmode converters boasts higher common-mode attenuation, improved elevated-ambient-temperature performance, and a lower-profile package than previous generation products.
The F4804A, rated at 4 amps and up to 80 volts (a single filter can be used with multiple converters), includes a differential LC-filter stage, which virtually guarantees compliance with FCC conducted-noise standards across the frequency range from 150 kHz to 30 MHz, including the fundamental switching frequency and its harmonics. Test results show headroom of 15-20 dB for conducted noise quasi-peak levels, in relation to Class B requirements. When applied in accordance with the guidelines described in the product's datasheet, the filter does not require airflow and its operating characteristics will not be adversely affected at elevated ambient temperatures (to 85°C).
Click here for the product datasheet. The product is priced at $9 each in quantities of 1000. The F4804A, with a footprint of 1-by-0.75 inches, is available in RoHS-compliant lead free and lead-solder-exempt versions, and meets UL60950 and IEC/EN60950. Samples are usually available from stock. Production quantities are typically available in six to eight weeks.