PSS controller is first to feature BJT drive scheme
1 min read
The first of a new generation of Primary Side Sensing (PSS) controllers has been unveiled by CamSemi.
The C2172 utilises the company's advanced BJT drive scheme with integrated base and emitter switching.
The company says the controller will enable manufacturers to develop the industry's lowest cost, most energy efficient BJT based solutions for mobile phone chargers and other universal input applications rated to 6.5W.
CamSemi's proprietary BJT drive technology uses combined base and emitter switching to boost switching performance and deliver higher operating efficiencies, more Reverse Bias Safe Operating Area (RBSOA) margin and the flexibility to accommodate a range of low cost BJTs.
The C2172 is designed to deliver no load power consumption below 30mW and 'best in class' load transient response, but with significantly lower system cost and component counts.
The ic power consumption and design have also been optimised to enable the benefit of fast start but without needing the additional cost and complexity of an additional active start up switch.
