Test/review of Power supply frontend DPH3205 32V/5A with buck/boost converter - Page 1
Forum section: electronics / testgear

author: HKJ
author_rank: Super Contributor
timestamp: April 30, 2017, 03:30:54 pm
content: In this article I will only include a few details, for more see the full review here:http://lygte-info.dk/review/Power%20DPH3205%20UK.htmlThis device is the front end for a power supply, it must be supplied with low voltage DC power (Up to 40V).Official specifications:Input voltage range: 6.00-40.00VOutput voltage range: 0V-32.00VOutput current: 0-5.00AOutput power range: 0-160WMax allowable input current: 5AProduct Weight: about 227gDisplay module size: 79*43*41(mm) (L*W*H)Open size: 71mm*39mmPower module size: 93*71*41(mm) (L*W*H)Length of connecting line: 200mmFixed hole center distance: 86mm, 64mmOutput voltage resolution: 0.01VOutput current resolution: 0.001AOutput Voltage accuracy: ± (0.5% + 1 digit)Output Current accuracy: ± (0.5% + 3 digits)I got it from aliexpress store: RD official store on AliexpressThe control unit has a nice display, four buttons and a encoded that can be pressed.The V and A buttons will enable adjustment of voltage and current with the encoded, press the encoder to select digit, when finished press SET.Holding down V/A/SET will recall a preset, with V and A it is preset 1 and 2, with SET any of the 9 presets can be selected.On the settings screen it is possible to define a couple of parameters: Voltage, current, over voltage, over current, over power, display brightness. The "over" settings will turn output off if they are reached.The device has 9 preset memories. To save a preset adjust the parameters, move the marker to M0, adjust the encoded to desired preset number and hold down the SET button.40V input and 15V output, current is swept from 0 to 5AThe bump in the internal power consumption is when the fan starts.12V input and 15V output, current is swept from 0 to 5ASweeping input voltage do not affect output voltage.When stepping from zero to full load the output voltage drops significantlyConclusionThis module is very useful to build a cheap high power bench power supply with. Add a cheap switching power supply, a box, some binding posts and some work.The module works fine, but it is not very good for loads that pulses from very low current to very high current. This is a problem with all supplies, but the degree varies. This supply does not give over voltage, but drops significantly and is some time to recover.If possible I would prefer to use the buck only units from RD tech, they have better efficiency and are better at maintaining voltage with pulsing loads. They do also pack much more power for their size.Compared to professional units it is missing a lot: Lower noise, both numeric keypad and encoded, 4 terminal connections, computer control, larger display. But for the price it is good and works fine.

author: BravoV
author_rank: Super Contributor
timestamp: April 30, 2017, 05:21:54 pm
content: Thanks for the review.I've been eyeing for these RD products as the price is quite attractive, also I think they're quite suitable for an ad-hoc field's psu, like emergency battery charger and other miscellaneous non critical use with input power from car's lighter jack.

author: RD Tech
author_rank: Regular Contributor
timestamp: August 03, 2017, 03:58:02 am
content: thank you