At the Qualcomm 4G/5G Summit, Charging Head Network obtained an 18W QC4+ charger. The charger does not have a LOGO or nameplate, but the product is very small and has a folding plug, which immediately attracted the attention of the editor, so it took it back to the editorial department for further testing and disassembly. Let me share with you the specific disassembly details.
1. Charger appearance and performance
This QC4+ charger is in a rectangular shape, ABS+PC flame retardant material, pure white appearance, single USB-C output interface design. The AC pins of the
charger are foldable, which is convenient for storage and makes the product smaller.
uses ChargerLAB POWER-Z FL001SUPER to perform protocol detection on the USB-C port, and it shows that the supported protocols are USB PD, QC2.0, and QC3.0.
Then, it continued to perform PDO packet detection on the USB-C port, showing that there are five gears, namely 5V, 9V, and 12V fixed output voltage, as well as two sets of PPS voltages, 3.3V-5.9V and 3.3V-11V. It can be seen that this is a standard QC4+ charger.
charges iPhone X, voltage is 8.78V, current is 1.58A, power is about 13.88W, fast charging USB PD is turned on.
charges iPhone XS Max, voltage is 8.77V, current is 1.92A, charging power is about 16.88W, and turn on USB PD fast charging.
charges iPhone XS, voltage is 8.78V, current is 1.77A, power is about 15.56W, turn on USB PD fast charging.
gives iPad Pro 10.5 inches, 11.75V/1.42A, power is about 16.8W, USB PD fast charging is turned on.
MacBook Pro 2018 model, 11.74V/1.43A, power is about 16.81W, turn on USB PD fast charging.
2. Charger disassembly
Remove the charger from the AC pin side, and the PCBA is connected to the AC pin through two white wires.
pull out the charger internal PCBA.
PCBA front view, the transformer is sprayed with "EE16-490uH DM-1832" encoding, the primary side is two electrolytic capacitors , and the secondary side is one solid capacitor .
input terminal is equipped with a JURCC safety capacitor , an NTC thermistor and a common mode inductor.
The primary side of the two electrolytic capacitors from KNSCHA, the specification is 400V and 15μF, and the blue next to it is an anti-interference Y capacitor.
output a solid-state capacitor with a specification of 25V 680μF, and the USB-C output interface is soldered on a small PCBA.
The back of the small PCBA is a USB PD protocol chip provided by Fintek Jingtuo Technology, model F75183A. The chip supports Qualcomm QC 4.0/4.0+ fast charging, and also supports USB PD2.0/3.0 (PPS).
fine-tuning F75183A detailed information.
PCBA back list.
charging head network disassembly summary
Currently, there are not many QC4+ chargers available on the market, and the small size is even more scarce. This newbie uses 9V voltage fast charging for iPhone, while the iPad uses 12V voltage fast charging, both of which are turned on, and can also charge the MacBook Pro at 12V, which has good compatibility. Disassembly found that this charger uses Fintek's protocol chip F75183A, which supports Qualcomm QC4.0/4.0+ fast charging, and also supports USB PD 2.0/3.0 (PPS).
