The new technique for the lowest power consumption in the stand-by of power supply

SMPS losses consist of switching loss, conduction loss, and core loss. In case of light load the switching loss takes the most things in SMPS. Conventional burst mode operation meets the requirement of low power consumption. But, it is not sufficient for low frequency switching at no-load condition to provide the source of IC's bias. High frequency switching increases switching loss of SMPS. Moreover recently lower stand-by power, the input power of about 0.09 mW at the no-load condition, is required. This paper presents that during the burst mode decreasing IC's consumption power at the internal block makes system high efficient and prevents malfunction at the minimum load.