SPRUIX0D February 2021 – August 2021
The following sections describe the power distribution network topology that supplies the GP EVM board, supporting components and reference voltages.
The AM64x/AM243x GP EVM board includes a power solution based on discrete power supply components. The initial stage of the power supply will be 12 V from a barrel jack connector with part reference J6. J6 supports 8A current rating and necessary diodes for reverse polarity protection and voltage surge protection. The 12 V input (VMAIN) of the EVM that is used to generate all necessary voltages required by the EVM.
A ON/OFF switch with part reference SW1 is provided to turn ON/OFF the EVM by connecting this switch to Enable pin of LM5140, thereby, allowing the switch to turn on or off the board based on the switch position. The board is in off condition when switch is grounded position 1-2 and in on condition when the switch is in position 2-3. Additionally GPIO from the test automation header is also connected to the switch to control ON/OFF of the EVM via the test automation board. A fault indication LED LD5 will be in ON status in case of reverse polarity. LD6 will be in ON status to indicate VMAIN power good.