APA102 transfer data via standard SPI protocol which is similar WS2801 or LPD8806 chip. its footprint is SMD5050 with 6 feet. Including Two signal (CI,DI) input, and Two signal (CO, DO) output. exteral 2 feet, one is 5V, other is GND.
So far, we here can supply two kinds APA102 led, one is ordinary version, Just like ws2811/ws2812b chip built in led. The beam angle is 120 degree,Other package with an increased metallization area to improve heat conduction and larger beam angle (160 degree)