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TPS65987D: Power States and these state's behavior

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Maurice

Replies: 8

Views: 99

Part Number: TPS65987D

Hi, everyone,

We want to know how TPS65987DDH becomes OFF / idle / active and so on.

So could you tell us

1) Power State Diagram

and

2) Power States Summary
*When TPS65987DDH is OFF / idle / active,
what becomes of FOSC_100k / FOSC_24M / USB type-C detection / I2C / UART / SPI / USBPD ?
Please tell me these functions are available or not.

I'd appreciate if you share (1) Power state diagram & (2) power states summary
like Figure 5-1 and Table 5-1 of TPS65982 datasheet.

Mastermind 23395 points

Eric Beljaars
- Feb 1, 2019 1:36 PM
Hi Maurice,

The power states for TPS65987D are the same as the TPS65982. The only difference is that the TPS65987D will not lose the first I2C transaction when recovering from sleep mode, the TPS65982 will.

You can use the same power state diagram and power state summary from TPS65982 for TPS65987D.

If this answers your question, PLEASE select This resolved my issue

Thank you,
Eric
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Intellectual 515 points

Maurice
- Feb 4, 2019 12:38 AM
In reply to Eric Beljaars:
Hi, Eric-san,

Thank you for your reply.

Now, I have another question.

Can TPS65987DDH support Fast mode I2C interface (400kHz) during sleep power state?

Because we want to know
whether TPS65987DDH can respond to Fast mode I2C communication during sleeping or not.

Best Regards,
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Eric Beljaars
- Feb 4, 2019 1:15 PM
In reply to Maurice:
Hi Maurice,

Yes, the TPS65987D can support 400kHz I2C coming out of sleep mode.

Thank you,
Eric
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Maurice
- Feb 7, 2019 10:13 AM
In reply to Eric Beljaars:
Hi, Eric-san,

Thank you for your reply.
I'm sorry, but I have some additional questions.

(1) In datasheet of TPS65987DDH,
it says "System Power State" 0x20 is recommended as following:
0x00 = S0 / 0x03 = S3 / 0x04 = S4 / 0x05 = S5
in Table 1-1.

How about S0ix ? What value should we use for S0ix ?

e2e.ti.com/.../768789
(2) Are there any disadvantage
if we make TPS65987DDH Sleep even in S0 state?
Because we want to make power consumption as small as possible.

Best Regards,
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Eric Beljaars
- Feb 7, 2019 1:55 PM
In reply to Maurice:
Hi Maurice,

I'm not sure what "S0ix" is. When the PD controller is in S0 state, it is fully awake and active. Are you asking if it is okay to leave the PD Controller in S0 state while the notebook goes into a Sleep State?
There should be no issues with doing that.

Thank you,
Eric
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Maurice
- Feb 12, 2019 11:34 AM
In reply to Eric Beljaars:
Hi, Eric-san,

Thank you for your reply.

I'm sorry,

we're asking
if it is okay to leave PD controller Sleep state:
- 0x20: 05
- 0x70: 05
regardless of without any notebook state (S0 / S3 Sleep / S4 Hib. / S5 OFF).

>I'm not sure what "S0ix" is.

For detail, please refer this website.
software.intel.com/.../vtune-amplifier-help-s0ix-states

Best Regards,
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Eric Beljaars
- Feb 12, 2019 1:54 PM
In reply to Maurice:

Hi Maurice,

Yes, it is okay to leave the device in that configuration:

- 0x20: 05

- 0x70: 05

The PD controller will automatically wake from sleep mode if there is any I2C communication or PD communication.

If this answers your question, PLEASE select This resolved my issue

Thank you,
Eric
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Maurice
- Feb 13, 2019 9:22 AM
In reply to Eric Beljaars:
Hi, Eric-san,

Thank you for your reply.
I understand this matter.

Best Regards,
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