Measurements

UM1470

12/19

Doc ID 022241 Rev 1

Figure 6 shows the efficiency of the SMPS at full load applied on the 12 V, depending on the

different input voltage. A drop of efficiency at low input voltage is mainly caused by an

increase in the losses in the input inrush resistor and EMI filter.

Figure 6.

Efficiency at full load (150 mA) over input voltage range