Today, we will take apart the Xiaomi USB Type-C 65W power adapter to explore its internal structure.
The Xiaomi USB Type-C 65W power adapter looks basically the same as the 45W power adapter except for its slightly larger volume.
The power output cable has been reinforced at the base to ensure durability. In addition, we can also see the Xiaomi logo.
Close-up of the Type-C port
The power adapter supports 5V, 9V, 12V, 15V, and 20V voltage output modes. Its max output power is 65W.
The size difference between 45W and 65W power adapters.
The charger cover is welded onto the body using ultrasonic technology. After prying off the cover, it can be seen that a lot of foam adhesive fills the space between the circuit and the casing. However, even after removing the foam adhesive, the circuit board still cannot be separated. Therefore, the cover on the output end needs to be removed.
The cover of the output end adopts a double-layer structure design. The top cover is welded to the body using ultrasonic technology.
There is a circular hole near the output cable. Use a proper screwdriver to push it slightly.
Remove the circuit board from the casing.
The front of the circuit board
This is the back of the circuit board. Such a component layout is beneficial for heat dissipation.
The main capacitor is covered by an independent metal shield.
We can see the brand and specifications of the main capacitor: Taiwan Chinsan ELITE 420V 120μF.
The rectifier bridge shares a heatsink with the main switching regulator.
Transformer model and specifications
Blue anti-interference capacitor
There are two electrolytic capacitors connected in parallel at the output. They are SAMXON 25V 470μF and Taiwan Chinsan ELITE 25V 680μF.
The Type-C output cable has three cables.
Lite-On rectifier bridge KBP208GL 2A800V.
Toshiba K3569 main switching regulator
PWM
Taiwan Weltrend WT6630P USB PD controller
Lite-On Schottky barrier rectifier G40120CTW
When using POWER-Z to activate fast charging mode, the test results indicate that this adapter does not support any mainstream fast charging protocols.
Using POWER-Z to activate PD mode, the test results show that the maximum current values of the adapter at different voltages in PD mode are completely consistent with the data on the product packaging.
Xiaomi USB Type-C 65W power adapter components
It would be great to see a teardown and comparison with another MI 65W model, the CDQ07ZM, with detachable cable and QC support.
Is this charger interchangeable with other models? I would like to check whether the device is wrong.
Thanks
Yes, it is a universal charger that can be used on other devices.
Just missing the pinout of the USB-C connector.
Black – GND (A1 – A12 – B1 – B12)
White – VBUS (A4 – A9 – B4 – B9)
Blue – CC1/CC2 (A5 – A8 – B5 – B8)
GND is easy to find in any cable; it is always black. VBUS tends to be red (thickest cable). CC1/CC2 can be guessed. After connecting the other two, keep connecting the other cables until the charger works.