DRA718: DRA718 problem

David chen

Part Number: DRA718
Other Parts Discussed in Thread: TPS65919-Q1, TPS65917-Q1

hi Team:

1. in the datasheet: On page 161 , How to understand"could ramp up concurrently with VDDA_PLL group only if the vdda33v_usb1 power resource has an “off impedance” greater than 100Ω."?

2. I want to use TPS65919 PMIC for DRA718,Can you provide reference circuit diagram?

3. in the datasheet: 5.10.3 Power Supply Sequences ,Inconsistent with the following description, which is correct?

over 6 years ago

0 Lyuben Aleksiev over 6 years ago

TI__Prodigy 515 points

Hi David,

Please refer to the "TPS65919-Q1 and TPS65917-Q1 User's Guide to Power DRA71x, DRA79x, and TDA2E-17" document. Follow this link - http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=slvuax9&fileType=pdf Figure 1 shows the detailed connections between a processor and the pmic. If you intend to use the DDR3 (not DDR3L) type of memory, please see Figure 2. The TPS65919 pmic is validated for using as a power source by TI and all power sequence requirements are met.

Regards,

Lyuben.

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DRA718: DRA718 problem