New Industry Products

STMicroelectronics Intros STSR2 Smart Driver IC

February 20, 2003 by Jeff Shepard

STMicroelectronics Inc. (Geneva, Switzerland) introduced the STSR2, a smart driver IC for synchronous rectifiers that includes specialized control circuitry to let designers take advantage of the lower conduction losses offered by MOSFETs and boost the efficiency of power converter designs. The STSR2 provides two complementary high-current outputs, able to source 2A and sink 3.5A, to drive the power MOSFETs used as secondary synchronous rectifiers in high-efficiency forward topology with a low output voltage.

Suited to distribute power, telecom and computer server power supplies, the device is designed to derive a reliable synchronization from the secondary side of the transformer. The STSR2 operates from a 4.5V to 5.5V supply in the 20kHz to 750kHz frequency range. The built-in under-voltage lockout feature guarantees proper start-up and avoids undesirable driving when the supply voltage drops. The STSR2 is supplied in an eight-pin, small-outline package. The STSR2 is available now for $0.65 for 50,000 quantities.