23rd #USB #TypeC analysis is the +Anker​​ PowerPort+ 5 USB-C charger with USB-PD. [Model A2053111]
tl;dr: EXCELLENT. Overbuilt/over-specced charger. Has IR drop compensation (hooray!). Provides 45W Power Rules compliant USB-PD, not just 30W as printed. But suffers from unadvertised "Split PDO" at 20v, .55 PF could be better.

(Edit 10/31:) Warning, this charger have been "revised". The new version is only 30w USB-PD, not 45w.

(Edit 9/3:) IR compensation is within allowable limits, thank you +Benson Leung for pointing out the change!


[PDF of Compliance Checklist for Anker A2053111]

These ended up on my doorstep, so I am analyzing them. This charger overbuilt, under-advertised, and functions great. I'd recommend this as a multiport charger for people with laptops. (Or Apple Type-A iDevices.) Only downside is it's glitchy with the 20v setting and is not particularly environmentally-friendly.

First, the ratings: on the side of the box it only claims 30W USB-PD, with voltages that are PD2.0 compliant. (5/9/15/20 -- 12v got the boot.) The Type-A ports have Apple 2.4A D+/D- signaling. However, if you actually look at the USB-PD signals it sends, it is actually capable of 45W. So you are getting more than you pay for!

Problem is the 20V PDO object is glitchy and isn't advertised until sometime after a device is connected. This means I couldn't run any tests at 20v using my Twinkie PD sniffer. This is called "Split PDO" and is described by +GTrusted​​ in their article on this charger here:


However from +Benson Leung​​'s testing with Dell and Chromebook laptops, this almost doesn't affect charging. The laptop will initially select 5v, say "I could use more", then the charger re-advertises with the 20V object included. The laptop then switches from 5v to 20v. So you might run into some problems with devices (like the Twinkie) that only look for the first advertisement.

This charger has IR drop compensation. (Hooray!) This makes it only the second compliant charger with a female USB-C port I've seen with this technology. This means it boosts voltage output at load to compensate for losses/resistance in the cable. For comparison, the dodocool 30W (port) and Innergie 45W (cabled) are the only other compliant chargers I've seen with this.

This means noncompliant devices like the Nexus 6P that require >4.95v to charge will work great. In fact, for the first time ever, I was able to see the Nexus 6P charge at a full rate of 3000mA in Ampere! It even shot to 3010mA briefly.

(Edit 9/3:) Please see the comments, Benson had pointed out there was a change and this IR drop compensation now within limits. So everything is A-OK!

This comes with a downside. The Anker IR compensation is almost TOO excessive. It boosts voltage using my OEM-quality Scosche 5A cable to 5.25v. That's right on the upper threshold of USB-PD acceptable 5v (+/-5%) voltages. If I were to use a "excellent" quality cord like the j5create 5A JUCX01, which has smaller IR drop, the Anker charger would overshoot voltage to an out-of-tolerance 5.30v.

This isn't as bad as it sounds. A non-USB-PD charger can go to 5.5v-4.0v at 3A load and be compliant. It just means the Anker is ever-so-slightly out of spec for a USB-PD charger, which are held to higher standards. This was probably by design, since cable resistance can only go UP, and I'd agree with their decision.

Finally, the Power Factor on this charger is extremely low. Even with just a Nexus 6P connected (5v/3a), it draws 18.1W/34.4VA at the wall. That a PF of .52 at light load, efficiency 83%.

Power factor isn't exactly efficiency... best way to think about it is it clogs public resources. A hydrogen-powered bus with 1 passenger on it is efficient, but clogs public infrastructure. Similarly a 1970s minivan packed with 12 people is a gas guzzler, but is "efficient" in that it frees up the roads.

Computer power supplies are actually required by law to have a PF of >.9 to free up the electrical grid, using "Power Factor Correction" circuitry (PFC). This circuitry is generally expensive, and optional, so most manufacturers omit it. I just make it a point to point out PFC since these high-power USB-C supplies blur the lines between "computer power supplies" and "wall warts". Helping the environment helps everyone.

All in all this charger is well built, engineered, and forgoing some (potentially big PDO) glitches is a good multiport charger. So this is proof Anker can make good products, if they put their minds to it.

[Plus] Analyses Anker A205311
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