RayRailSwSense

RayRailSwSense switches and monitors your amplifier’s DC rail using a smart high-side switch IC (U1) with built-in protection and a precision IS current-sense pin. The sense line is scaled to 0–3.3 V for direct connection to an ADC (e.g., ADS1115) on the controller. Logic control uses 3.3 V inputs (IN/DEN), and the board includes a field-replaceable blade fuse, input TVS, bulk/RC filtering, and a ferrite bead on the logic 3.3 V rail.

Two SKU options are supported by swapping U1: a 25 A version and a 50 A version. The pin header (J3) exposes Out+, 0–3.3 V Out, logic IN, optional VIN-sense, IS/Out-sense, and GND for easy adoption by third-party controllers, PLCs, or test rigs.