USB EZ-PD Type-C

Hello, I am currently developing a USB PD power bank that utilizes bi-directional 60W input and 100W output. My plan is to use SC8815 I2C bidirectional buck-boost controller for Power and CYPD 3171 as the PD controller. I want to use CYPD3171 to control SC8815 over I2C to configure SC8815 modes(input and output) as well as output and charging voltage, etc. I also want CYPD3175 to inform the main MCU of PD modes, voltages, currents etc. My question is that what is the best way to achieve this functionality? Should I use EZ-PD config utility or PSOC programmer to write the code? Also, how should I upload the program onto CYPD3175, can I use an ST-Link, or use another MCU over I2C? Can someone recommend me a software and programmer combo? I saw this reference design using sc8915 which is extremely similar to my application, and I think I am going to reference the schematic, but I don't see where the code is located, could someone also inform me of where it is located so I can use it as a reference if possible? I am new to the CCG3 ecosystem, thank you very much!

Hi everyone,

I want to configure the DS-1 port of CY611 EZ-USB HX3PD EVK to supply 12V. But when I try to configure  using EZ-USB HX3PD configuration Utility - PD Controller- Port 1, it shows me error - Atleast one 5V PDO should be enabled in Source PDO. But if add another source PDO of 5V, it does not save the configuration.

Can anyone help please ?

Thanks

Sugreev

Hi, 

I would like to know where I could get firmware and utilities for a CY7C65219 and CYPD5235  based dock solution using Goshen Ridge.

Hi All - 

I'm not 100% certain that this is the right location for this discussion, so my apologies if it is not.

I'm trying to understand how the USB PD specification requires the handling of a situation where a PD Source offers a power rating in one of its PDOs that is higher than a PD Sink requires.   

For example, in my application I'm considering configuring my CCG2 with the following Sink PDOs: 

• 5V@3A  [15W], 
• 9V@2.8A  [25.2W], 
• 15V@1.8A  [27W].

My application uses a charger that would likely draw 2.64A@9V  or 1.66A@15V .   At 5V my charger would like to draw 3.6A, but the charger is limited to an input current of 3.3A, so I think a 3A PDO limit is fine as I'll software limit the charger.

My confusion is how the CCG2 will negotiate with various off-the-shelf chargers that are available on the market.   For example, the Nintendo Switch and Apple MacBook chargers offer the following PDOs:

Switch:

• 5V@1.5A [7.5W]
• 15V@2.6A [39W]

MacBook:

• 5.2V@2.4A [12.5W]
• 9.0V@3A [27W]
• 14.5V@2A [29W]

Now, when I plug my device into the Switch charger, which of my configured PDOs will it default to?  My highest PDO power draw is 27W, so will the Switch output my requested 15V@1.8A or will it provide me with 9V@3A which seems to be a standard 27W supply... 

The same question happens for the MacBook charger.   If I plug that into my device, then which PDO will be negotiated?

Let's also assume that my highest PDO option was actually 15V@2A instead of 1.8A for a power draw of 30W.  In that case, would the Switch negotiate 15V@2A even though that isn't one of the listed PDO that it offers?  And the MacBook charger... What would that output?

Hopefully this information will be useful to others as well.  I can't seem to find clear examples of these negotiations anywhere else.

-Shane

Hi guys,

I use CYPD3020 controller for my project. I want to use Timer/Counter block with input counter. When I connected digital input pin and Counter I got an error: Pin guidance unavailable: 'Pin_1(0)' cannot be placed at P3[3]. P3 cannot be used for routed connections.

Could you help me?

Best regards,

Nazar Melnichek