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The SN51DP is a staple in the repair of from brands like Arielli, Crown, and Felix, particularly those using the TP.S506.PB801 or TP.V56.PB801 main boards. SN51DP - Original Electronic Components for PCB & BOM

Input for PWM or analog dimming signals to control brightness.

Output to drive the external MOSFET for the boost converter.

The SN51DP pinout usually follows a standard 10-pin configuration for LED drivers: Power supply input.

Used to stabilize the output voltage/current loop.