Foxeer 4K Ambarella A12

This page is about the Foxeer digital camera, model Foxeer 4K Ambarella A12, manufactured and distributed by Foxeer here: https://www.foxeer.com/foxeer-4k-ambarella-a12-hd-camera-uav-pwm-remote-control-wifi-distortionless-lens-tv-out-micro-hdmi-g-220.

Useful information:

 * 1) Power is provided through the microUSB connector, goes to a Zenner diode (Dxx) for overvoltage protection, and then is transferred to the power board via 3 pins (labelled VIN).
 * 2) The power board is the bottom board of the stack. It receives 5V from the USB, and provides a continous 3.1V for the power button.
 * 3) There are 2 DC-DC converters on the power board:
 * 4) RT9992 uses up to 5 of its outputs, and has 4 of the enable pins connected to the 32-pin connector.
 * 5) T8010A is configured for 3V output, and its enable is also controlled from the 32-pin connector.
 * 6) The 16-pin connector is used only for Wi-Fi, and the camera turns on even if the connector is disconnected (i.e. is not properly seated).

Resources:

 * 1) x-ray view of the power board (see picture on the right)Xray of power board.jpg
 * 2) Richtek Tech RT9992ZQW datasheet
 * 3) Richtek Tech T8010A datasheet