TUSB4041I: Request schematic review

Tess Chen

Part Number: TUSB4041I

1273.TUSB4041.pdf

Hi Team:

Could you please knidly help review the design with TUSB4041I ? Any improvement sugguestions will be appreciated. Thanks in advance.

Best Regards,

Tess Chen

over 5 years ago

0 Brian Zhou over 5 years ago

TI__Guru**** 158705 points

schematic looks good, power switching is not supported?

0 JMMN over 5 years ago

TI__Guru 60870 points

Hi Tess,

A few more comments on the schematic:

SMBUSz should not be pulled low unless a SMBUS host will be used to configure the hub after power on or the hub will not function.

USB_VBUS is a detection input and needs to be connected to a signal that is high when a host is connected. It should be connected through a resistor divider network so it switches to around 500 mV when on.

The hub is configured as ganged with no power switches, is that correct?

Regards,

JMMN

0 Tess Chen over 5 years ago in reply to JMMN

TI__Intellectual 2675 points

Hi JMMN，

Thanks for your prompt feedback. The hub is configured as ganged with power switch. Please find the power switch schematic in the attachment.TPS2001C.pdf

0 JMMN over 5 years ago in reply to Tess Chen

TI__Guru 60870 points

Hi Tess,

If separate power switches are enabled for each port, the hub is not ganged (GANGED = 0), and full power management is enabled (FULLPWRMGMTz = 0). So the application can use the internal PU/PD settings for these pin configurations.

Thanks,

JMMN

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TUSB4041I: Request schematic review