Synchronous Four Switches -a

This is the first version of a synchronous four-switch module I made as a personal hobby.
However, the first version had some issues, so I modified it (mentioned below). The
second version...
I chose such a large inductor just to see what a unique high-power flat copper inductor would look like (I bought it anyway, so I tried it out, though it was a bit pricey lol).
 
The LT 8390 is a synchronous 4-switch buck-boost DC/DC controller that regulates output voltage, input, or output current when the input voltage is higher, lower, or equal to the output voltage. A proprietary peak buck/peak boost current-mode control scheme allows adjustable and synchronized 150 kHz to 650 kHz fixed-frequency operation, or internal ±15% triangular spread spectrum frequency modulation for low EMI. With an input voltage range of 4V to 60V, an output voltage capability of 0V to 60V, and seamless low-noise transitions between operating regions, the LT 8390 is ideal for regulator, battery, and supercapacitor charger applications in automotive, industrial, telecommunications, and even battery-powered systems.
During the initial development, a hiccup was observed in the output short-circuit protection. Subsequent simulation revealed that the capacitance value of the SS pin and the compensation network of the VC pin were causing the issue.
 
 
The chip datasheet describes the SS pin as follows:
SS: Soft-start timer setting. The SS pin is used to set the soft-start timer by grounding a capacitor. An internal 12.5μA pull-up current charges the external SS capacitor, causing the FB regulation voltage to gradually rise. A 0.1μF capacitor is recommended for this pin. Any UVLO or thermal shutdown will immediately pull the SS pin to ground and stop the switch. Under output short-circuit conditions, using a single resistor from SS to VREF, the LT8390 can be configured with three different fault protection modes: hiccup (no resistor), latch-up (499 kΩ), and hold-on (100 kΩ).
Excessive capacitance on the SS pin triggers the chip's short-circuit protection, causing an abnormal output.
 
The chip datasheet describes the VC pin as follows:
VC: Error amplifier output setting inductor current comparator threshold. The VC pin is used to compensate the control loop via an external RC network. When LOADEN is low, the VC pin is disconnected from all internal loads to store their voltage information.
Abnormal resistor and capacitor values ​​on the VC pin can cause problems in the compensation control loop; the values ​​used here were determined through simulation. (I haven't fully understood the external compensation control loop; I also encountered this issue with the SCT2650, lol).
 
I chose a high-power flat copper inductor simply to test this seemingly high-end component. However, if I want to boost the voltage from 11V to 15V to the preset 48V, the current output capability is quite limited (actually around 500mA; if outputting 1A, it only reaches about 45V). But for my purpose of charging an 18V solar panel to power a 48V battery, current output capability isn't a critical requirement.
 
Please consult the LT8390 datasheet before making any modifications.
To modify the output voltage of a DC-DC step-up/step-down converter, you can follow these steps:
Vout = 1V × (upper resistance + lower resistance) / lower resistance. Overvoltage protection is 1.1 times the target voltage. Short-circuit protection is when the pin is below 0.25V. Vout | R7 | R8 | R1 48V 470K 0 10K 24V 200K 30K 10K 19V 180K 0 10K 12V 100K 10K 10K
 
 
If there are any errors, please feel free to point them out. orz