VIPerX2A family has ultra-low standby power dissipation, burst mode operation in standby, 72% typical efficiency, current mode controller, output short circuit protection, thermal shut down protection.
The document presents an application note (AN2063) detailing how to build a battery charger with ultra-low standby power dissipation using the VIPerX2A family, specifically the VIPer12A. The solution achieves typical efficiencies of 72% and reduces no-load power consumption to approximately 50mW at 100Vdc input by utilizing burst mode operation.
The note provides a complete circuit description including PCB layout guidelines for minimizing electromagnetic emissions, a general fly-back regulator schematic, and specific design solutions for energy saving such as optimized voltage sources for optocouplers and snubber configurations. It includes performance results regarding load regulation, line regulation, efficiency curves, and transformer specifications.
The standby power is around 82mW when using a TL431 reference.