The SY8123 is a DC-DC synchronous buck regulator IC chip that can replace the SY8122 and SY8122A.
When replacing the chip, it is necessary to understand the pin function, pin ordering, internal structure and parameters of each chip in detail, including whether the chip is integrated with a continuous diode, feedback voltage value, EN on\/off threshold, input\/output voltage range, output current size, etc. Then through comparison, to find the same or similar parameters of the chip, can implement substitution.
When replacing a chip, perform this operation with caution and strictly follow related safety regulations. If necessary, it is recommended to consult a professional technician or go to an electronic equipment repair shop for help.