Barrier rectifier raises efficiency of LED drivers

Diodes Inc. recently introduced their SBR1U400P1 super barrier rectifier. Having a forward voltage of about 25 percent lower than standard p-n diode alternatives, the new SBR device has been made to increase the efficiency of off-line LED drivers. This 1A, 400V rated part is ideal for both bridge (with a 120V AC input), and buck stages of driver circuits.

Some applications which benefit from these devices are LED light bulbs, lighting ballasts, signage and street lighting.

The rectifier's typical ultra-low forward voltage of less than 0.65V for a current of 1A at 125 degrees C translates to a significant reduction in power consumption, now possible for a wide range of off-line LED driver circuits. Furthermore, this is offered in Diodes' own high performance PowerDI 123 package for optimized heat dissipation.

Lastly, SBR1U400P1 also has a high-speed switching performance with a maximum reverse recovery time of just 85ns (If=0.5A, Ir=0.5A, Irr=0.25A). The rectifier exhibit soft recovery and removes ringing, resulting in an overall reduction in electrical noise generation.