SC8201 High-Power Synchronous Boost Module

I. Initial Intent:
The school dormitory cuts off the power every night at 11 pm, and sometimes I need to run some demanding applications on my laptop. It's not ideal to always use the laptop battery. I happened to have a 12V lead-acid battery on hand, so I wanted to use a high-efficiency boost module to utilize this battery to power my laptop. Since I couldn't find a satisfactory one on Taobao (or they were too expensive), I ended up tinkering (
which involved researching, buying a bunch of tools and components, and then realizing the total cost had far exceeded my expectations).
II. Design Summary
: After consideration, the final boost controller used was the Southchip SC8201, and the power transistors were TO-220 packaged IPP040N06N. High-current traces on the PCB were soldered or buried copper. The power transistor routing followed the SC880x/SC870x routing guidelines. Component parameters are detailed in the SC8201 documentation and engineering circuit diagram.
III. Physical Images & Test Diagrams:
New Generation Finished Product Physical Images & Test Diagrams

: Physical Images:


Test:
For ripple measurement, since my small oscilloscope doesn't seem to have a direct ripple measurement function, I used two capacitors and a 10-ohm resistor to help measure the ripple. I'm not sure how accurate it is. 12V power supply:
Output 20V: No-load ripple: No-load power consumption: With a 1.7 ohm dummy load resistor, output current 12A, input current 21.2A (due to the long wire, the input voltage dropped from 12.16V at the power supply output to 11.68V):
Ripple at this time: Powering a laptop, then dual-stress test:
Old version finished product picture & test picture
Output 20V, with 1.7 ohm resistor / laptop test
IV. Supplement
This project mainly references the following projects:
https://oshwhub.com/diy-lover1123/high-power-automatic-buck-boost-module-sc8701
https://oshwhub.com/aknice/sc8701

Due to limitations, not much testing was done. Roughly estimated efficiency can reach over 95%, but standby power consumption is a bit high, around 1W, but I personally feel it's not a big problem.
Some time before this project was released, I accidentally broke the double-layer PCB The original project was accidentally deleted, so what is being released now is the still-existing multilayer board project file.
I haven't been using JLCPCB EDA for very long, and the circuit diagram and PCB layout have been modified many times, resulting in some component numbering issues. Please forgive me.