Hello everyone. I got an LED driver for an LED chandelier. The CB-2S module (BK7231N) is soldered on the board, an unknown microcircuit and analog drivers with PWM regulation BP2958. On the CB-2S, only 3.3 V, GND, TX1, RX1 are soldered. Pins TX1 and RX1 are connected to an unknown chip directly, and this chip is connected from BP2958 to PWM pins. Does anyone have an understanding of how it all works?...
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