Over these years, Apple released 18W and 20W fast chargers for iPhone and iPad.
And the appearance is almost the same.
So, what's the difference between those two chargers except for the 2W.
Today, ChargerLAB is gonna answer it.
Let's go.
Firstly, the model number is different.
The older one is A1695.
And the newer one is A2244.
The size of the Apple 20W is about 41*42*27mm (1.61*1.65*1.06 inches).
And the power density is 0.44W/cm³.
The size of Apple 18W is almost the same.
And the power density is about 0.37W/cm³.
And those two chargers are equipped with the same USB-C port.
Here is the specs info of those two chargers.
The manufacturer and output power are significantly different.
The input prongs cannot be folded.
And we can see a "20W" icon on the left side.
The weight of Apple 20W is about 58g (2.05 oz).
And the weight of Apple 18W is about 62g (2.19 oz).
18W is slightly heavier than 20W.
Next, let's check what's inside.
This is the front of the internal module.
Two electrolytic capacitors of those two chargers are placed horizontally and vertically.
The USB-C connector of the 18W adopts full-pin design.
But the 20W charger removed unnecessary pins.
Thanks to the built-in PI IC,
only the protocol chip and the output VBUS MOSFET are placed on the back of the PCB.
And the groove of the 18W charger can isolate the primary and secondary circuits.
Both power ICs are from PI, which integrates primary controller, MOSFETs, feedback circuit,
and secondary synchronous rectifier controller.
So, we won't introduce them later.
The 20W charger adopts ZN1461C.
And 18W charger adopts SC1263K6.
And then, the protocol chip of Apple 20W is from Infineon CYPD2134 (CCG2 series).
The protocol chip of Apple 18W is from Infineon CYPD3135 (CCG3 series).
As for the synchronous rectifier, the 20W charger adapts Diodes product,
marked with T89.
And the 18W charger adopts ON Semiconductor's product,
marked with S10L.
Two electrolytic capacitors of 20W charger are from Nichicon (15μF 400V) and CHEMI-CON (400V 15μF).
Both electrolytic capacitors of 18W charger are from Nichicon (15μF 400V).
30μF in total.
The solid capacitor of 20W charger is from Fujitsu FP5K series.
560μF, 12V.
And the 18W charger adopts CHEMI-CON PSG series
560μF, 16V.
Both chargers adopt customized USB-C connectors.
It is made of plastic and is fixed by metal plate.
Just as we mentioned, the USB-C connector of the 18W adopts full-pin design.
But the 20W charger removed unnecessary pins.
ChargerLAB POWER-Z KT002 shows two chargers can support the same protocols.
Only PD2.0.
And the PDOs are slightly different.
The maximum current increased from 2A to 2.22A.
Well, that's all the difference between Apple 20W and 18W chargers.
We've made a chart for you to compare.
And the 20W charger only sells for $19, while 18W was priced at $29.
This is because the Apple 20W adopts cheaper components.
For example, the withstand voltage of solid capacitor has dropped from 16V to 12V.
And the USB-C connector is reduced from 24pins to 16pins, etc.
This is the first comparison video we've made.
Please leave your comments down below to tell us your thoughts.
See you in the next video. Bye.