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GOLF CART voltage reducer converter 48V to 12V 10A 120W
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- Input Voltage: 48V nominal Input range: 40V to 60V
- Input Current: 10A (max) No-load input current: ≤10mA
- Output Voltage: DC 12V ±2% Output Current: 10A
- Ripple wave: 50Mv Starting delay time: ≤ 2S
- Maximum Efficiency: ≥90%
Product detailsSize:48V to 12V 10A | Colour:48V to 12V 120W
- Is Discontinued By Manufacturer : No
- Package Dimensions : 10.01 x 8.1 x 3.2 cm; 249 Grams
- Date First Available : 19 June 2012
- Manufacturer : Yorktek
- ASIN : B008CM4WZ2
- Item Model Number : OMEL-EZ-PN-6722206
Best Sellers Rank:
94,084 in Electronics (See Top 100 in Electronics)
- 465 in International Power Adapters
- Customer Reviews:
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All epoxy sealed containers with Waterproof Die-Cast Aluminum Housing; Light compact, convenient to use and transport; Non-isolated High efficiency:> 90%; Operating temperature at -10 ℃ to +60 ℃; (max.+80 ℃) With overload / over-current / over / low voltage protection, stable performance. Auto recovery High efficiency:> 90%; Operating temperature at -10 ℃ to +60 ℃; (max.+80 ℃): With overload / over-current / over / low voltage protection, stable performance: Auto recovery.
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5.18V no-load Out at 12.14v In
5.11V * 1.00A Out / 12.14V * 0.49A In = 85.9% efficiency
5.02V * 1.90A Out / 12.12V * 1.92A In = 85.3% efficiency
Approx 375KHz switching frequency
Approx 60mV ripple (across loads tested above)
12.1V input, 4.5A "short-circuit" (my DMM has about a 0.25 ohm shunt) output current, stabilizing over a period of a few seconds to 5A.
Will it hold up at 10A output? At 85% efficiency, that's 0.9W dissipated per 1A output. The unit is potted inside a small plastic box with no exposed metal heatsink. I doubt it would survive long while dissipating 9 watts. I'd keep it around 3A output.
Inside this server I have 36 HDS723030ALA640 Hitachi 3.5" disk drives and a Rosewill Tachyon 1000W PSU to get the show going.
While the Tachyon has a big fat 83A 12V rail... it only has an anemic 20A 5V rail...
The HDS723030ALA640 uses 3W on the 5V rail and 7W on the 12V rail, which means that the 36 drives alone will overload the PSU (and they did).
My solution was to buy 3 of these DC-DC converters, each to sit on the 12V rail and provide independent 5V rails (running off the 83A 12V DC rail)... I built a custom harness that provides for a 6 Pin ATX/GPU input and a 12 SATA power drops with silicon wiring on the other side (tapping into both the original 12V feed and the 5V output from this)
Now each of these 50W DC-DC converters nicely feeds 39W as an independent 5V rail to 12 HDS723030ALA640's, with some room to spare.
BTW, I was very paranoid about using these in a computer grade application with dozens of very expensive hard drives, but after multiple tests using crappy EOL drives and carefully monitoring the output, then watching the output on a digital scope for spikes/funny business, I finally put them into production...
So tiny... but so powerful... I love these converters!
Reviewed in the United States on 29 December 2019