PSoC 6 BLE Pioneer Kit - Power Usage

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joco_4017211
Level 2
Level 2

I am using the CE219881 example project to measure power usage for the M4 processor.  My measurements are coming out higher than expected.

https://www.cypress.com/documentation/code-examples/ce219881-psoc-6-mcu-switching-between-power-mode...

Note: The example project runs the CPU at 100Mhz instead of 150Mhz, is there an example power usage project designed for the PSoC 63 chips which run at LP (150Mhz) and ULP (50Mhz)?

At 100Mhz, power measured ~7.85mA, which is about 78.5 uA/Mhz.  Almost double the 40uA/Mhz specified by the datasheet. Is there something I'm overlooking.  Is there an example project which configures the device to match the datasheet power usage?

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RodolfoGL
Employee
Employee
250 solutions authored 250 sign-ins 5 comments on KBA

For better power numbers, you should use the BUCK instead of LDO. In Creator, this is changeable in the Design Wide Resources > System > Power Mode. Pick 1.1V BUCK SIMO.

If you can run at 50 MHz, you can pick 0.9V BUCK SIMO, which consumes lower current.

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RodolfoGL
Employee
Employee
250 solutions authored 250 sign-ins 5 comments on KBA

For better power numbers, you should use the BUCK instead of LDO. In Creator, this is changeable in the Design Wide Resources > System > Power Mode. Pick 1.1V BUCK SIMO.

If you can run at 50 MHz, you can pick 0.9V BUCK SIMO, which consumes lower current.

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RodolfoG_11 wrote:

For better power numbers, you should use the BUCK instead of LDO. In Creator, this is changeable in the Design Wide Resources > System > Power Mode. Pick 1.1V BUCK SIMO.

If you can run at 50 MHz, you can pick 0.9V BUCK SIMO, which consumes lower current.

Okay. Are there other downsides to using the BUCK?  It has a lower 20mA power limit according to the linked document below.  Is it enough power to run the BLESS?

https://www.cypress.com/file/385936/download

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Yes, you can run the BLESS with less than 20 mA. If you check the PSoC 63 datasheet (table 38), most of the BLE configuration consumes less than 10 mA.

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The notes when switching to the BUCK converter state there won't be hardware protection when using it.  What hardware protection is not available?

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