TDA3MV: Power Down Sequence for TDA3x

Hiroyasu Tazawa1

Part Number: TDA3MV

Hi,

Let me talk about Power down Sequence of TDA3x and TPS65917

We see TDA3x Section Note3 of Figure 5-2 in Datasheet.

=================
If vddshv* are used as 3.3V, they can start ramping down no sooner than 100µs after PORz low assertion and must ramped
down before vdd_dspeve. If all vddshv_* are 1.8V, then neither vdd_dspeve or vdd should start ramping down no sooner than 100µs
after PORz low assertion.
=================

But Figure8 of this application note mention that it seems same timing between RESET_OUT and REGEN1(GPIO_3).

www.tij.co.jp/.../litabsmultiplefilelist.tsp

These timing are difference.
Is it no probrem ??

and My customer are planning this system.

Best Regards
Hiroyasu

over 8 years ago

0 Mariya Petkova over 8 years ago

TI__Expert 4885 points

Hi, Hiroyasu Tazawa1,

Could you provide the full part number of the PMIC or the OTP number the customer shall use?

The same Note is commented here:

Regards,

Mariya

0 Hiroyasu Tazawa1 over 8 years ago in reply to Mariya Petkova

Guru 12350 points

Hi, Mariya

Thank you for your reply !

My customer is planning to use O917A152TRGZRQ1.

Best Regards
Hiroyasu

0 Mariya Petkova over 8 years ago in reply to Hiroyasu Tazawa1

TI__Expert 4885 points

Hi, Hiroyasu Tazawa1,

The datasheet of the TPS65917 can be downloaded from here:

Figure 5-3. Power Sequence Example shows a time lag between the two signals RESET_OUT and REGEN1.

See 8.3.5 Power Supply Mapping section in data manual for more information about approved PMIC solutions for TDA3x. Furthermore, the Data Manual of TDA3x lists TPS65917 as the approved and validated power supply.

Regards,

Mariya

0 Hiroyasu Tazawa1 over 8 years ago in reply to Mariya Petkova

Guru 12350 points

Hi, Mariya

Thank you! I got it.

Best Regards
Hiroyasu

Processors

Processors forum

TDA3MV: Power Down Sequence for TDA3x