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TUSB8044A: Assistance on TUSB8044A

David Choi
Prodigy 10 points

Part Number: TUSB8044A
Other Parts Discussed in Thread: HD3SS3220

I cannot navigate this section properly as the Forum part of Contact Support is in Chinese and I do not understand. Hopefully someone can direct me to the proper support team.

I have a question on the USB Hub controller TUSB8044A. Is a PD controller and EEPROM required to make this work? The output will only be 5V 1.5A each(two ports). Can it work standalone with TUSB8044A and HD3SS3220 per port?

I'm wondering what is the advantage of having I2C and EEPROM support is for my application.

  • 0
    TI__Guru 54770 points

    您好，
    已经收到了您的案例，调查需要些时间，感谢您的耐心等待。

  • 0
    TI__Guru 53335 points

    您好

    When the upstream port is not connected and battery charging support is enabled for a port, the TUSB8044A drives the port power enable active. If AUTOMODE is disabled, then DCP mode is used. If AUTOMODE is enabled and fully automatic mode is disabled (FullAutoEn bit is cleared (Reg_25h Bit 0) or FULLAUTOz pin = 0), then TUSB8044A will start with highest enabled divider current mode (ACPx). The TUSB8044A will remain in highest current mode as long as a pull-up is not detected on DP pin. If an pull-up is detected on DP pin, then TUSB8044A will drive the port power enable inactive and switch to Galaxy mode, if enabled, or to DCP mode if Galaxy mode is disabled. The TUSB8044A will again drive the port power enable active. The TUSB8044A will remain in Galaxy mode as long as no pull-up is detected on DP pin. If an pull-up is detected on DP pin, then TUSB8044A will drive the port power enable inactive and transition to DCP mode. The TUSB8044A will again drive the port power enable active. In DCP mode, the TUSB8044A will look for a pull-up detected on DP pin or RxVdat. If a pull-up or RxVdat is detected on DP, the TUSB8044A will remain in DCP mode. If no pull-up or RxVdat is detected on DP pin after 2 seconds, the TUSB8044A will drive the port power enable inactive and transition back to ACPx mode. This sequence will repeat until upstream port is connected. When Automatic mode is enabled and full automatic mode is enabled (FullAutoEn Reg_25h bit 0 is set or FULLAUTOz pin = 1), TUSB8044A will perform same sequence described in previous paragraph with the addition of attempting all supported ACPx modes before sequencing to Galaxy Mode (if enabled) or DCP mode. The supported battery charging modes when TUSB8044A configured for SMBus or external EEPROM is detailed in Battery Charging Modes with SMBus/EEPROM Table. The supported battery charging modes when TUSB8044A configured for I2C but without an external EEPROM is determined by the sampled state of the pins. These modes are detailed in Battery Charging Modes without EEPROM Table.

    请您参考这个部分datasheet说明，不同模式下可以达到不同的结果