SPRABU5 May   2019 AM3351 , AM3352 , AM3354 , AM3356 , AM3357 , AM3358 , AM3358-EP , AM3359

 

  1.   AM335x Hardware Design Guide
    1.     Trademarks
    2. 1  Introduction
    3. 2  Constructing the Block Diagram
    4. 3  Selecting the Boot Mode
    5. 4  Confirming Pin Multiplexing Compatibility
    6. 5  Confirming Electrical and Timing Compatibility
    7. 6  Designing the Power Subsystem
    8. 7  Designing the Clocking Subsystem
    9. 8  PCB Floorplan
    10. 9  Creating the Schematics
    11. 10 Laying Out the PCB
    12. 11 Board Bringup/Diagnostic
    13. 12 Refereces

6 Designing the Power Subsystem

Once the block diagram has been validated for pin multiplexing, electrical, and timing compatibility, the power sub-system can be designed. See the below resources on estimating power consumption and designing a matching power subsystem.

  • AM335x Power Consumption Summary wiki: The AM335x power numbers discuss the power consumption for common system application usage scenarios for the AM335x Arm®Cortex®-A8 Microprocessors (MPUs). Power consumption is highly dependent on the individual user’s application; however, this document focuses on providing several AM335x application-usage case scenarios and the environment settings that were used to perform such power measurements.
  • AM335x Power Estimation Tool: The Power Estimation Tool (PET) provides insight into the power consumption of select Sitara processors. The tool includes the ability for you to choose multiple application scenarios and understand the power consumption as well as how advanced power saving techniques can be applied to further reduce overall power consumption.

    • Table 1. AM335x Power Options

    TPS65217x TPS65218 TPS65910x TPS650250
    A B C D A A3
    Battery Charger Yes No No No
    Boost WLED backlighting No No
    AM335x OPP OPP50, OPP100 OPP50, OPP100,
    OPP120, Turbo, Nitro    		 OPP50, OPP100
    OPP120, Turbo, Nitro    		 OPP50, OPP100, OPP120, Turbo, Nitro OPP50, OPP100
    Power 3DCDC @ 1.2A 3 DCDC @ 1.8A
    1 DCDC @ 1.6A
    2 low-q DCDC for RTC
    1 LDO and 3 LSW    		 2 DCDC @ 1.5A
    1 DCDC @ 1A
    9 LDO    		 1 DCDC @ 1.6A
    2 DCDC @ 0.8A
    3 LDO
    Input Voltage Range 2.7 V - 5.8 V 2.5 V - 6.5 V 2.7 V - 5.5 V 2.5 V - 6.5 V
    DVFS/SmartReflex Yes Yes Yes No
    RTC-Only Mode Yes No Yes Yes No
    DDR DDR2, LPDDR1 DDR3 DDR3L DDR3, DDR3L DDR2, LPDDR1 DDR3 DDR2, LPDDR1, DDR3
    Package 48 pin QFn, 6 mm x 6 mm 32 pin QFN
    5 mm x 5 mm    		 48 pin QFn, 6 mm x 6 mm 32 pin QFN
    5 mm x 5 mm
    TA - 40°C to 105°C - 40°C to 85°C - 40°C to 85°C - 40°C to 85°C
  • Powering the AM335x With the TPS65217x
  • TPS65910Ax User's Guide For AM335x Processors
  • Powering the AM335x With the TPS650250