Copyright © 2017, Texas Instruments
Incorporated
Copyright © 2017, Texas Instruments Incorporated
Hardware
9
SPRUII5A – December 2017 – Revised November 2018
Copyright © 2017–2018, Texas Instruments Incorporated
DRA77xP/DRA76xP-ACD CPU EVM Board
3.2
Power Architecture
shows the EVM’s power distribution system. The power management solution is created from
four total devices. A step-down 12 V to 5 V / 3.3 V converter provides the primary 5v0/3v3 power rails for
the entire system. The TPS65917 and LP87565 devices are optimized for the SoC maximum power and
sequence requirements. A sink/source regulator provides the DDR power and termination rails.
Figure 5. Power Distribution Block Diagram
An external power supply is required to power the EVM, but is not included as part of the EVM kit. The
external power supply requirements are:
Power Jack: 2.5 mm ID, 5.5 mm OD
Nom Voltage: 12 VDC
Max Current: 5000 mA
Efficiency Level V
External Power Supply Regulatory Compliance Certifications: Recommended selection and use of an
external power supply that meets TI’s required minimum electrical ratings in addition to complying with
applicable regional product regulatory/safety certification requirements, (for example, UL, CSA, VDE,
CCC, PSE, and so forth).