Boost converter efficiency, TPS61021A - Electrical Engineering Stack Exchange
i using tps61021 boost converter ic increase input voltage 1.2v 3.3v. have designed boost converter application called ti webench.
input voltage: 1.2v
output voltage: 3.3v
min current: 300ma
the pcb have designed, measuring 3.3v, efficiency pathetic. below 25%. in bom, ti webench software recommends using 10uf 10v capacitor, using 10uf 6.3v. not able understand why efficiency low? datasheet inductor.
below in tabular format have written current values have measured multimeter.
fig.1 measurement of current @ different load resistance.
pin = 1.2v × 570ma = 684 mw
pout = 3.3v × 105 ma = 346.5 mw
efficiency = pout/pin = 346.5/684 = 50.7%
how on earth did come 18.42%?
similarly, 64% , 70% other 2 loads. these numbers sound pretty me @ these voltages. did webench give efficiency estimates specific configuration?
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