When a multi-voltage switching mode power supply (SMPS) from China is in operation, it itself consumes a portion of power. Therefore, its input power is greater than its output power. The efficiency of a multi-voltage SMPS from China is the ratio of its output power to its input power, that is, the efficiency of a multi-voltage SMPS from China is the output power divided by the input...

  When a multi-voltage switching mode power supply (SMPS) from China is in operation, it itself consumes a portion of power. Therefore, its input power is greater than its output power. The efficiency of a multi-voltage SMPS from China is the ratio of its output power to its input power, that is, the efficiency of a multi-voltage SMPS from China is the output power divided by the input...