4 Replies Latest reply on Apr 16, 2020 4:33 PM by TaWa_1260451

# VDD_MIPI current consumption of CX-3

I am designing PCB using CYUSB3065-BZXC.

How much the maximum current consumption for VDD_MIPI of CX-3, if CX-3 is working MIPI 4 lane, 1Gbps/lane?

The datasheet doesn't say the working current consumption, but  suspended current.

Is there any information?

Best regards,

• ###### 1. Re: VDD_MIPI current consumption of CX-3

Hello,

Please refer to Q3. of this KBA CX3 Hardware: Frequently Asked Questions - KBA91295

Question: How much current does CX3 draw from the USB VBUS supply?

Answer: The total current CX3 draws from the 5-V source in normal mode is approximately 112.6 mA. This is the worst-case scenario (1080p at 30fps, 24-bit data bus, 6 V at VBUS, 3.6 V for I/O supply, 1.25 V for Core / USB 3.0 supply).

Note: These values are based on the following criteria summarized in the table below. This assumes using switching regulators with approximately 85% efficiency for 5 V to 1.2 V, 1.8 V, or 3.3 V conversion.

Parameter

Voltage (V)

Current (mA)

Power (W)

External Power Converter Efficiency

Input Power (W)

Core1.25159.20.199
VBUS622.60.136
U3Tx1.2517.10.021
U3Rx1.2530.20.038
I/O supply3.623.50.085
Total power0.4780.850.563
Current from VBUS5112.6

If you use only the USB 2.0 port of CX3, then the current drawn is approximately 98.6 mA. When the device is in the standby mode, it draws approximately 68 uA; in the suspend mode, it draws approximately 3.2 mA.

Regards,

Rashi

• ###### 2. Re: VDD_MIPI current consumption of CX-3

I'm not sure which "Parameter" has the current consumption of VDD_MIPI (VDD_MIPI is the ball name of CX-3).

I would like to know the correspondences between "Parameter" in the table and physical ball name of CX-3.

Are those correspondences between "Parameter" and ball names of CX-3 correct?

Core : VDD_MIPI, VDD and AVDD,

VBUS : VUSB

U3Tx : U3TXVDDQ

U3Rx : U3RXVDDQ

I/O Supply :  VDDIO1, VDDIO2, VDDIO3 and CVDDQ

Best regards,

• ###### 3. Re: VDD_MIPI current consumption of CX-3

Hello,

Yes, your understanding is correct. The parameter core in the KBA includes VDD_MIPI, VDD and AVDD  domains

and the rest

VBUS : VUSB

U3Tx : U3TXVDDQ

U3Rx : U3RXVDDQ

I/O Supply :  VDDIO1, VDDIO2, VDDIO3 and CVDDQ

Regards,

Rashi

• ###### 4. Re: VDD_MIPI current consumption of CX-3

Perfect !