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OSD3358-SM-RED
– User Guide
Rev. 1.0 9/19/2017
Octavo Systems LLC
Copyright 2017
4
Detailed hardware design
The following sections describe the hardware design of the OSD3358-SM-RED platform.
4.1
Power management
The following figure shows the power system of the OSD3358-SM-RED board. The voltage
rails, their current sourcing capabilities and the components that are powered by them are also
shown.
Figure 37: Power system outline of OSD3358-SM-RED
The power system of the platform is comprised of :
1. AC, USB, battery inputs
2. protection circuit on AC input
3. The PMIC TPS65217C and LDO TL5209 inside the OSD3358-512M-BSM.
The PMIC is responsible for powering the AM335x processor and the DDR3 as well as provide
output power for other system needs. It provides configurable power-up and power-down
sequencing required by the processor and monitors the processor input voltage levels. It
contains 3 DC-DC power converters, 2 LDOs and 2 load switches that are configured as LDOs
and used as power supplies. It can be powered by any combination of a 5V AC adapter, USB
