MP2225 converter or Large Step-Up board modified into a SEPIC
Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.
In brief: Based on review measurements: Test current: MP2225 converter (4.5 A vs. 2); Temperature rise: Large Step-Up board modified into a SEPIC (70 °C vs. 108).
Large Step-Up board modified into a SEPIC2015Read review →
Voltage, V
5.3
28
Current, A
4
2
Test current, A
4.5
2
Temperature rise, °C
108
70
Review conclusion
With reservations
Recommended
Only in one review: In test 3.3 W (Large Step-Up board modified into a SEPIC); Under load 3 V (Large Step-Up board modified into a SEPIC); Ripple 80 mV (MP2225 converter); Efficiency 96 % (MP2225 converter); Protection 4.5 A (MP2225 converter); Price 0.6 $ (Large Step-Up board modified into a SEPIC).
MP2225 converter: The compact board meets its stated specs, but sustains 4 A only briefly and heats up noticeably under prolonged load.
Large Step-Up board modified into a SEPIC: After modification, the board works stably and delivers up to 700 mA at 3.3 V from a lithium cell.
Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.
MP2225 converter2020Read review →
Large Step-Up board modified into a SEPIC2015Read review →