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What is the average power consumed by a CYUSB3064 or CYUSB3065 device when streaming 1080p30 video over USB?
What is the minimum solution size (PCB area) for that application?
Thanks,
Michael
Solved! Go to Solution.
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Please refer question 3. in 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) |
---|---|---|---|---|---|
Core | 1.25 | 159.2 | 0.199 | ||
VBUS | 6 | 22.6 | 0.136 | ||
U3Tx | 1.25 | 17.1 | 0.021 | ||
U3Rx | 1.25 | 30.2 | 0.038 | ||
I/O supply | 3.6 | 23.5 | 0.085 | ||
Total power | 0.478 | 0.85 | 0.563 | ||
Current from VBUS | 5 | 112.6 |
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.
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Please refer question 3. in 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) |
---|---|---|---|---|---|
Core | 1.25 | 159.2 | 0.199 | ||
VBUS | 6 | 22.6 | 0.136 | ||
U3Tx | 1.25 | 17.1 | 0.021 | ||
U3Rx | 1.25 | 30.2 | 0.038 | ||
I/O supply | 3.6 | 23.5 | 0.085 | ||
Total power | 0.478 | 0.85 | 0.563 | ||
Current from VBUS | 5 | 112.6 |
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.