Demo #2: Change The Sink Capabilities From The Ez-Pd™ Configuration Utility - Infineon EZ-PD CY4534 Manual

CY4534 EZ-PD™ barrel connector replacement-plus (BCR-PLUS)
evaluation kit guide
Kit operation
To set up the demo, perform the following steps:
1. Connect a multimeter to the DC_OUT terminal block (J2) of the CY4534 EZ-PD™ BCR-PLUS EVK. If desired,
you may also have a load connected in parallel with the multimeter. See
polarity of the terminal block or look at the markings on the back of the board.
2. Connect the EVK to the EZ-PD™ protocol analyzer's plug. Connect the EZ-PD™ protocol analyzer to your PC
using the USB micro-B cable supplied with it.
3. Ensure that the protocol analyzer software (known as EZ-PD™ analyzer utility) and the necessary drivers are
installed. See the CY4500 EZ-PD™ protocol analyzer
4. Open the EZ-PD™ analyzer utility and start a capture.
5. Connect a USB Type-C power adapter to the Type-C receptacle of the protocol analyzer. You will observe
USB power delivery packets captured on the EZ-PD™ analyzer utility.
Each USB Type-C power adapter will advertise a list of voltage and current combinations (called PDOs). The
BCR-PLUS device will select the best PDO based on a set of rules described in the
and current requested from the power
In short, the VBUS_MAX rotary switch governs the highest voltage that the BCR-PLUS device will request. If that
voltage is unavailable, it looks for the next highest voltage, and so on.
To test this, perform the following steps on the demo setup:
6. Set the VBUS_MAX rotary switch (SW1) to position 1. Verify that the multimeter connected to the DC_OUT
terminal (J2) displays a voltage between 4.5 V and 5.5 V. Detach the power adapter after this observation is
verified. Note that unlike the CYPD3177 EZ-PD™ BCR device, the CYPD3176 BCR-PLUS device requires a
power cycle to register the change in VBUS_MIN and VBUS_MAX voltages.
7. Set the VBUS_MAX rotary switch (SW1) to position 2. Re-attach the Type-C power adapter. Verify that the
multimeter displays a voltage between 8.55 V and 9.45 V. If the power adapter does not support this voltage,
you will observe ~5 V.
8. Repeat steps 6 and 7 through all switch positions and observe the output voltage on the multimeter
connected to DC_OUT terminal (J2). If the power adapter supports that voltage, the multimeter reading will
be in the range of VBUS_MAX ± 5%.
3.2.2 Demo #2: Change the sink capabilities from the EZ-PD™ configuration
utility
The configuration parameters in the default firmware running in the BCR-PLUS device contain PDO#1 as a fixed
supply PDO and PDO#2 as a variable supply PDO. This demonstration shows how to change the BCR-PLUS
device's sink capabilities by using the EZ-PD™ configuration utility to remove the PDO#2 variable supply PDO to
disable the feature to request various voltages from the USB Type-C power adapter. The result is that the kit
will always request 5 V from the fixed supply PDO#1.
User Guide
kit webpage for details.
adapter section.
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Board details to determine the
Changing the VBUS voltage
002-34123 Rev. **
2021-10-21