![]() ![]() Not only the primary MJE13005 HV NPN transistor on the small 5V charger board was now completely short circuited, but also the 2 emitter resistors were gone, including the primary safety inrush resistor fuse to the greatz rectifier was blown. Replacing the old one was the best service he instantly could provide.Īfter I had removed the charger board from the brought over back flip box, I started examining its components. We got no clue what they did with the charger that made it completely blow up. The best chargers support their fastest rates on each port at the same time, with added devices slowing nothing down.My very handy nephew, who is a great professional new kitchen installer, brought over about a month ago an EVOLine 230VAC back flip Power outlet Box with now defect 5V USB charger board in it he had to replace at a customer’s house with a brand new EVOLine back flip box. Combined power output: After testing each individual port, we tested the combined output when each was pushed to the maximum.Then we repeated that test on each charger’s other ports, confirming that every port behaved as expected and that, combined, they matched the right output. ![]() We started with the power load set to 0 amps and then turned it up until it matched the promised amperage, ensuring the voltage stayed between 4.75 volts and 5.25 volts. This setup allowed us to finely control the power flow and determine whether it matched the advertised rate. Chargers with USB-A ports: We tested the maximum power draw from each port by plugging in a variable power load and an ammeter.We used the Total Phase USB Power Delivery Analyzer and its Data Center Software to measure and record this data, including the advertised power profiles, the steady state output, and whether any errors occurred in charging. Chargers with USB-C ports: USB-C uses digital communication between devices to verify charging speeds in a way that USB-A doesn’t with the right tools, you can interpret exactly what’s going on in the communication between the charger and the device you’ve plugged in.USB-A ports with 12-watt or QuickCharge 3.0 output: There’s no reason to choose a charger with USB-A ports slower than 12 watts (5 volts, 2.4 amps), because they’re not much less expensive and they offer slower charging to Apple and Android devices. ![]() Apple’s MagSafe wireless charger requires 20 watts in order to achieve its full wireless charging speed. But your device will pull only as much power as it’s rated for, so there’s no safety concern about your phone being damaged or overheating when you’re using a more-powerful charger. Phones that support USB Power Delivery (USB PD)-the standard that allows for fast charging over USB-C-generally draw as much as 18 watts, while larger devices can take 45 watts or more.
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