The Xiaomi Xiaoai Bluetooth Speaker Portable Version is a member of the Xiaoai family that has been around for a long time. It is a speaker that can be carried without the constraints of cables. Through this disassembly, let’s explore how this portable smart speaker is made. This Bluetooth speaker continues the Xiaomi’s beloved pure white simple design, and its size is very compact, easily held in one hand.
The honeycomb design on the top not only showcases aesthetics but also effectively allows sound to emanate. The shape of the speaker’s sound holes vaguely resembles a petal; overall, there is only one USB port for charging this small Bluetooth speaker. The silicone on the back serves both anti-slip purposes and effectively protects the buttons. There are two buttons here: one for power and the other for voice input. The model of this Bluetooth speaker is MDZ-28-DE, and there are no threaded fastening structures; beneath the silicone, there are only two buttons without other fastening structures.
It was unexpected that the upper and lower shells were bonded so firmly that disassembly had to be done violently.
The lower shell was reduced to a pile of debris, with no special structure; there were only two buttons, and the lower shell was ultrasonically welded to the upper shell, making it very stable.
The components on this side of the board are very densely packed and look a bit messy. Many wires are fixed by soldering. The board uses an onboard Bluetooth antenna, and the board is secured to the upper shell by three screws.
The main control chip is from Jerry Technology, the AP21289-26c8, and the crystal oscillator is 24MHz. This chip could not be found on Jerry Technology’s official website, indicating it might be a custom model.
The chip printed with LPS 9w9h1 is LPS’s LP5301, which is a voltage protection IC that supports 36V over-voltage and over-current dual protection, mainly used for charging input protection to effectively avoid high voltage shocks caused by charger misoperation.
The printed circuit for the lithium battery charging management IC is 7102, responsible for lithium battery charging and charge status indication.
The amplifier used is the ANEKE ANT8815S, which is an adaptive boost chip capable of driving a 2-ohm speaker with a maximum output of 8W in single lithium battery power supply mode. This mono class D amplifier also features low voltage detection to prevent the battery from crashing when the voltage is too low.
There are three pairs of red and black wires on the mainboard; the thinner ones are for the microphone, while the other two are for the speaker connection and battery line, all soldered to the board.
The battery is wrapped in a layer of foam to prevent damage caused by the outer shell’s pressure.
At the innermost end is a 4-ohm 2-watt speaker, fixed to the outer shell with three screws, ensuring sound can be transmitted through the openings to the outside.
Through disassembly, it can be understood that this product uses adhesive to secure the shell, indicating that it is basically a one-time product; if damaged, it cannot be repaired without damage. In terms of power supply, a protection circuit has been added to prevent high voltage from USB affecting the system. Currently, this is the only green PCB among the Xiaomi products I have disassembled; the previous ones were all black. This product has voice functionality and can be paired with Xiaoai for AI feature experience. It can be said that it is very compact, easy to carry, fully functional, and very affordable.
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