Módulo DC-DC de 250 W, 10-40 V a 10-50 V, módulo de potencia de impulso ajustable de 6 A, amplificador de CC de 250 W, voltaje constante y módulo convertidor de corriente constante

I have an application where I have to boost 20V to over 40V to do solar off grid cooking from a 12V 100W panel. Approximately 80W will be the typical power level in my application. This boost converter is on an aluminum substrate to dissipate heat more effectively. That aluminum substrate means the any soldering to the board will require a really hot iron as the aluminum quickly draws away the heat. My testing was at 4.4A input current. Listing says to enhance cooling over 4A with fan or additional metal on backplate. With an input voltage of 20.0V and 4.4A the input power was 88W. Output at 40V was 82.0W for an efficiency of 93%. I consider this quite good for boost converter. The converter did get warm without additional cooling, and I did not consider it excessive at this power level. The design is a typical TL494 switch mode chip driving 50N06 FET, 50A 60V. This converter claims 50V output capability. The output capacitors are only rated at 50V and I wouldn't recommend going over 45V.

This review is for the "250W DC-DC Module, 10-40V to 10-50V, 6A Adjustable Boost Power Module..." (ASIN: B0DSZY7XJ7). With its fully aluminum-backed PCB and large toroidal inductor this is a hefty little module. Verified via ohmmeter reading, the aluminum heat-sinking layer is electrically isolated from both input and output grounds (and presumably the rest of the circuit).Current sensing is via resistor R19, marked with value code "R010", indicating 10 milliohm. This SMD resistor is in a "2512" package (6.35 mm x 3.2 mm), and, without consulting a datasheet, has an approximate power rating of 1 Watt. Now, the converter's max rated current of 6 amps passing through 10 mohm of resistance dissipates (6 A)^2 × (10 mohm) = 360 mW, well within this current sense resistor's presumed rating. IMPORTANT: Because this current-sensing resistor is usually connected between the input and output ground solder pads (and their pre-soldered wires), marked "VIN-" and "OUT-", respectively, these two points should not be shorted together!!The PCB appears to be marked "aukuy" which is a trademark of Shenzhen Huasheng Electronic Technology Co., Ltd. Based on its website, this company is a Chinese distributor of legitimate major-brand chips (including Texas Instruments), suggesting genuine ICs populate the board. My board is also marked "REV:A0" and "SN:A1401220".Both the current and voltage adjustment pots increase their settings counter-intuitively by turning CCW. I found the minimum current limit setting attainable to be around 0.8A (when stepping up 16V to 24V loaded by approximately 24ohm).These potentiometers are only anchored to the PCB by their solder tabs, but they are not flush-mounted. In fact, they are canted at a small angle off the board. And so will move slightly when pushed with moderate force as their leads bend reversibly and spring back after stopping the force. I suppose a very meticulous buyer may want to fix them to the PCB more securely with some plastic compound (especially if these pots will be subjected to heavy-handed and/or frequent readjustment). By the way, the toroidal inductor was fixed (slightly above the board) only via its two soldered leads, contrary the current images (as of 4/6/2025) on this page which show a dab of a plastic compound anchoring it. And it will also flex a bit when touched.This module is functional with just a slight warming of the PCB's aluminum backing under the only conditions that, so far, I have tested it (boosting 16V to 24V with a 24ohm load for 24W output power). It should serve well in my current project that will not tax it above those values.Although I have not tested it under extreme conditions or for all specs, this module appears to be a well-built, reasonably (see above) solid, voltage boost converter worth the less than $9 price I paid for it. (I bought two and this review applies to both.)4/7/2025: Added an oscilloscope screenshot showing around 100kHz switching frequency and about 300mV pp of ripple with 16V input and 23.5V output modestly loaded at 1.4A. The output voltage ripple is visible in the lower yellow trace of channel 1 (the scopes 100kHz reference square wave is the upper blue trace of channel 2).