Comparison · Converters

USB DC-DC board, type one 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: USB DC-DC board, type one (3.2 A vs. 2).

Model	USB DC-DC board, type one2019Read review →	Large Step-Up board modified into a SEPIC2015Read review →
Voltage, V	5	28
Current, A	3	2
Test current, A	3.2	2
Review conclusion	Recommended	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); Temperature rise 70 °C (Large Step-Up board modified into a SEPIC); Price 0.6 $ (Large Step-Up board modified into a SEPIC).

USB DC-DC board, type one: Type one handles more current, runs cooler and has less ripple; the author explicitly recommends it.

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.