Siliconix Debuts SiP280x Current-Mode Controllers
Siliconix Inc. (Santa Clara, CA), a subsidiary of Vishay Intertechnology Inc. (Malvern, PA), announced a new family of low-power current-mode controllers that provide increased efficiency and flexibility in cost-sensitive power-supply designs. The new SiP280x pulse-width modulation (PWM) controllers serve a broad variety of converters in both offline and dc-dc current-mode switching power supplies in industrial, fixed telecom and datacom applications. The devices also are suitable for point-of-load (POL) regulation; high-efficiency dc-dc converter modules; and buck, boost, flyback and forward converters.
Siliconix's pin-for-pin-compatible replacements to the UCC380x/UCC280x family include the SiP2800, SiP2801, SiP2802, SiP2803, SiP2804 and SiP2805, each of which is built on a BiCMOS process and available in either a SO-8 or TSSOP-8 package. Intended for 10 W to 250 W power supplies, the new controllers can operate from a supply voltage as low as 5 V. The SiP280x Series also features a variety of turn-on and turn-off thresholds to accommodate various supply voltage, under-volatge lockout and hysteresis requirements. The controllers are rated for an operating temperature range of -40 °C to +85 °C.
Samples and production quantities of the SiP280x controllers are available now, with lead times of 8 to 12 weeks for larger orders. Pricing for US delivery is $1.50 for quantities of 1,000 pieces or more.
