Discussion "Bestiolino" Nano + Full New Power Management System (open source)

[Luigid]

Hi guys, while working on my project lately I developed two options, one "custom" and the other "complete" for portable applications. It has currently been developed and tested on the PlayStation 2, but obviously if it reflects the settings for other consoles it can also be used for them. At the moment the Wii should be cut out since it only has one power stage for the CPU/GPU, but I could think about remodeling it and adding an additional stage, perhaps for my XII Boy, since the PMS v1 has the 3.3V problem.

Bestiolino "Nano":

What is it and how does it work?

"Nano" is, like the word, a highly small and efficient micro regulation module. It uses a step-down model: TPS62816 from Texas Instruments. It is designed to be a "modular" module and to be "patched" directly onto the console's motherboard in order to apply the power directly without disturbances or voltage drops. It is easily modifiable and these are the technical specifications:

1. AEC-Q100 qualified for automotive applications – Device temperature –40°C to +125°C
2. Input voltage range: 2.7 V to 6 V --> therefore it is essential to use it with a 1S configuration (li ion - Lipo - LiHv etc.)
3. Output voltage from 0.6 V to 5.5 V
4. Maximum current delivered 6A

The output is quite simple to set just change the value of R1 - R2 - CFF , here is an example table:

Obviously, being a step down and if powered directly from the battery, I do NOT recommend output voltages below 2.5v.
Here it is in action on PS2:

Making a quick comparison with the tlv62095 testing outrun 2006 in demo mode I got 3h and 5min, with "Bestiolino" I went up to 3h and 27min only by replacing this regulator, about 12% more efficient.

Link for this first release:
GitHub

A quick tip:
The PCB has an F1 output for testing (I added a 3A self-resetting one), but it's best to remove it if it's working properly.
The inductor I chose was a 1uH inductor, but if you have height issues, you can use a 0.22uH like: AWLU0420F-R22MPA after a few quick tests, it seems to work properly.

 

[Luigid]

Bestiolino "Full":
currently in development / debugging ready for release
"Full" beast as the word suggests represents a real all-in-one PMS, let's study it more closely:

1. TPS62816 --> the heart of the "Nano" 6A maximum for cpu/gpu core
2. TPS628438 --> the replacement for the ldo there are 3 solderable models but all with the same package / pinout variable voltage from 0.4v up to 3.6v easily via a single resistor - in this setup 1.8V - 600mA Max
3. TPS628501 --> There are also various variables available (see datasheet) in this setup it will be used for 2.5v - 1A Max
4. TPS63802 --> Here is the "champion" IC , already extensively covered on my 79001, a hybrid converter capable of changing its internal operation to constantly deliver 3.5v 2A Max
5. TPS61022 --> "small" step up 5V - 8A available
6. Sw6106 --> last but not least, the heart of it all is a power bank IC that in addition to "giving us" a second 5V rail so as to separate for example PS2 / audio / LCD as we prefer, manages the cell charging and much more, currently it will be limited to 5V 2.5A input charging but can handle over 18W with fastcharge (to be tested), it is also easily customizable thanks to a single resistor to program the type of battery to use

Some comparison photos between 2nano" and u-amp: