Any manufacturer likes to spread myths about some “special technologies”. People like to believe that they have “special designs.” Raspberries were collected, including in China, make your own conclusions whether the Chinese have access to PMIC =)
Finding the right chip is not a problem at all. They are sold even in our country and cost $ 3. But, of course, you can continue to believe that there are unique microcircuits created specifically for an inexpensive device and available to VIPs. However, there are such microcircuits - Soviet microcircuits created for military purposes)
But now such microcircuits are sold in radio markets in Russia (they are bought because of gold)
Ali is full of PMIC offers, and this is understandable: any major manufacturer is required to provide repair shops with spare parts. Even Apple is forced to abandon proprietary decisions, you know?
Any company must provide parts for repair. Of course, if this is not a Chinese shed of Uncle Liao's family.
https://aliexpress.ru/item/33049459362. ... archweb0_0
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There are a lot of offers, by the way.
If you have all the necessary equipment, mainly a board heating device and temperature-controlled soldering irons, then you will replace this chip in about ten minutes. It is also implied that you really know how to work with smd components. On the video and in the accompanying article, the necessary temperatures and even the composition of the solder for repair are indicated. So this is just a trivial howto
Fortunately, RPIs do not varnish their microcircuits and do not use very advanced motherboard manufacturing technologies (as in some cell phones that turn into disposable ones, and the components are glued with a compound).
Here are the repair data, if anyone is interested.
Chips MXL7704 (RE is just another designation, not a “special chip for Raspberries, engineer writes that you can take the MXL7704-AQB-T QFN32): https://vk.cc/9B0NWV
The master used the Quick 857DW + soldering station - anti-static gloves, tweezers, homemade LBP, MS8268 household multimeter, 7 "separator (UYUE 948/988 - this is expensive in our country, they are often heated on gas separators), a microscope and a T12 soldering station , microwave tip for T12, flux NC-559, solder 0.8 mm 100 g with flux, copper braid for removing solder