PCA9306: suitable for HDMI level shift?

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Prodigy 10 points

Part Number: PCA9306

(+V3.3A-Always +V3.3S- System power +V5S- System power +V5S_HDMI1 – monitor / System power )

I would like to ask this question because the HDMI screen is powered.

1.+V5S_HDMI1 Powered by the display itself.

Should I use EN switch enable control for PCA9306 ?
Or Switch Always Enabled Is there any leakage of power from the monitor to the board when the motherboard is not plugged in?

HDMI_DDC_CLK /HDMI_DDC_DAT is powered by the display itself.

Should I use the VREE1 and +V3.3A-Always power supplies? If I use +V3.3S-System Power, will the power on the screen leak onto the board?

Is the PCA9306 suitable for HDMI level shift?

11 天前

0 Taylor 4 天前

TI__Expert 8725 points

Hi,

PCA9306 can be used to translate I2C signals, which your application appears to be. Generally speaking, there will be a small leakage current that always flows from VREF2 port to VREF1 port. Please check with your system if this leakage is accepted in the VREF1 side. This leakage is further discussed in section 8.1.8 and can be calculated through:

Ibias = (VCC2 - Ven)/RCC : Ven = VREF1 + Vth

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PCA9306: suitable for HDMI level shift?