UCD90320: UCD90320

Kevin Cho

Part Number: UCD90320

Tool/software:

Hi Sir,

I would like to configure the power-off sequence such that EN_RTVDD_0P77_MAC0 is turned off once AC_OK is pulled low.

However, based on waveform measurements, it appears that this setting is not functioning as expected. I’ve tried using a different monitored rail instead of a GPI pin as the reference signal, and it worked correctly.

May I confirm whether this means that GPI pins cannot be used as a valid trigger for power-off sequencing?

1 month ago

0 yihe 1 month ago

TI__Guru 65670 points

Please enable the GPI fault response to shutdown.

Regards

Yihe

0 Kevin Cho 1 month ago in reply to yihe

Prodigy 70 points

Hi Yihe,

Thanks for the reply.

I tried to follow your suggestion, but the following error message occurred:

Fullscreen 1526.Error message.txt Download

Overview
--------

Application: Fusion Digital Power Designer 7.10.1.0
Operating System: Microsoft Windows NT 6.2.9200.0
.NET Runtime: 4.0.30319.42000
Memory Used: 161.00 MB

Exception
---------

System.NullReferenceException: 並未將物件參考設定為物件的執行個體。
   於 TIDP.WinForms.Apps.DPGUI.c3.a(af A_0, e A_1, Boolean A_2)
   於 TIDP.WinForms.Apps.DPGUI.c3.ay1(p A_0)
   於 TIDP.WinForms.Apps.DPGUI.du.ay9(Object A_0, ab A_1)
   於 System.EventHandler1.Invoke(Object sender, TEventArgs e)
   於 TIDP.PMBus.ParameterControl.u.c(ab A_0)
   於 TIDP.PMBus.ParameterControl.u.b(Object A_0, ab A_1)
   於 TIDP.PMBus.ParameterControl.ReadOnlyParameterControl5.adl()
   於 TIDP.PMBus.ParameterControl.ReadWriteParameterControl5.adl()
   於 TIDP.PMBus.ParameterControl.ReadOnlyParameterControl5.aq()
   於 TIDP.PMBus.ParameterControl.ReadWriteParameterControl5.a(TDecodedValue A_0, c A_1)
   於 TIDP.PMBus.ParameterControl.ReadWriteParameterControl5.adn(TDecodedValue A_0, c A_1)
   於 TIDP.PMBus.ParameterControl.ReadWriteParameterControl5.acy(Object A_0)
   於 TIDP.PMBus.ParameterControl.ReadWriteParameterControl5.acz()
   於 TIDP.PMBus.ParameterControl.LowLevelParameterControlUserControl.d7()
   於 TIDP.PMBus.Parts.UCD90XX.ParameterControls.e.am()
   於 TIDP.PMBus.Parts.UCD90XX.ParameterControls.e.d(Object A_0, a A_1)
   於 TIDP.PMBus.Parts.UCD90XX.ParameterControls.Support.o.d()
   於 TIDP.PMBus.Parts.UCD90XX.ParameterControls.Support.o.c(Object A_0, EventArgs A_1)
   於 System.EventHandler.Invoke(Object sender, EventArgs e)
   於 DevExpress.XtraEditors.Repository.RepositoryItemCheckEdit.RaiseCheckedChanged(EventArgs e)
   於 DevExpress.XtraEditors.CheckEdit.set_EditValue(Object value)
   於 DevExpress.XtraEditors.CheckEdit.set_CheckState(CheckState value)
   於 DevExpress.XtraEditors.CheckEdit.set_Checked(Boolean value)
   於 DevExpress.XtraEditors.CheckEdit.ClearRadioCheck()
   於 DevExpress.XtraEditors.CheckEdit.set_EditValue(Object value)
   於 DevExpress.XtraEditors.CheckEdit.set_CheckState(CheckState value)
   於 DevExpress.XtraEditors.CheckEdit.set_Checked(Boolean value)
   於 DevExpress.XtraEditors.CheckEdit.Toggle()
   於 DevExpress.XtraEditors.CheckEdit.OnMouseUp(MouseEventArgs e)
   於 System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   於 System.Windows.Forms.Control.WndProc(Message& m)
   於 DevExpress.Utils.Controls.ControlBase.WndProc(Message& m)
   於 DevExpress.XtraEditors.BaseEdit.WndProc(Message& m)
   於 System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   於 System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   於 System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Loaded Assemblies
-----------------

Com.Muegel.Misc
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   Info Version: 
<empty>
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   Public Key Token: 
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Free.CommandLine
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   Public Key Token: 
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XtraDataTempAssembly
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Please let me know if there is any further action I should take.

Thank you.

AS9947-72XKB_UCD90320_Main_U190_17d_20250728_test.xml

0 yihe 1 month ago in reply to Kevin Cho

TI__Guru 65670 points

can you please try this?

TI-Fusion-Digital-Power-Designer-7.10.17.zip

Regards

Yihe

0 Kevin Cho 1 month ago in reply to yihe

Prodigy 70 points

Hi Yihe,

I have updated the GUI version and configured the fault response to shutdown. However, I found that neither the GPI nor the power rails are able to support the power-down sequence. Could you please help verify if there is any mistake in my configuration?

For example, MAC0_HBM_2P5_EN does not pull low along with MAC0_HBM_1P2_EN.

UCD90320 3.0.0.3330 Address 17 Project File_20250801.xml

0 yihe 1 month ago in reply to Kevin Cho

TI__Guru 65670 points

YOu have to enable the fault shutdown slave so that rail of MAC0_HBM_1P2_EN can shut down other rails.

Please refer the quick guide attached, especially on fault response section.

0871.UCD90xxx Quick Guide.pptx

Regards

Yihe

0 Kevin Cho 28 days ago in reply to yihe

Prodigy 70 points

Hi Yihe,

Thank you for your suggestion.

The Power-down sequence is working as expected.

One more question: how can I trigger the power-down if the AC_PG signal from either PSU1 or PSU2 is pulled low?

0 Kevin Cho 28 days ago in reply to Kevin Cho

Prodigy 70 points

More information: Since the PSUs are configured in a redundant setup, the power-down sequence should be triggered only when both PSUs are powered off.

0 yihe 27 days ago in reply to Kevin Cho

TI__Guru 65670 points

I would recommend to use PIN SELECTED RAIL STATE

https://www.ti.com/video/5819104021001?keyMatch=fusion%20digital%20power%20designer&tisearch=universal_search

Regards

Yihe

Power management

Power management forum

UCD90320: UCD90320