Cypress EZ-PD CY4533 매뉴얼 - 페이지 18

{카테고리_이름} Cypress EZ-PD CY4533에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Cypress EZ-PD CY4533 20 페이지. Barrel connector replacement (bcr) evaluation kit

Open the analyzer software and start a capture.

Connect a USB Type-C power adapter to the Type-C receptacle of the analyzer. You will see USB Power Delivery

packets on the analyzer software.

Each USB Type-C power adapter will advertise a list of voltage and current combinations (called PDOs). The BCR

controller will select the best PDO based on a set of rules described in

from Power Adapter

In short, the VBUS_MAX rotary switch governs the highest voltage that the BCR device will try to 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:

Set the VBUS_MAX Rotary Switch (SW1) to position 1. Verify that the multimeter displays a voltage between 4.5V

and 5.5V.

Set the VBUS_MAX rotary switch (SW1) to position 2. Verify that the multimeter displays a voltage between 8.55V

and 9.45V. If the power adapter does not support this voltage, you will see ~5V.

Similarly loop through all voltages and verify that the multimeter reads VBUS_MAX ± 5%, if the power adapter

supports that voltage.

3.3 Behavior under Mismatching Capabilities

If the attached USB Type-C power adapter can supply a VBUS voltage within VBUS_MIN and VBUS_MAX limits, the CY4533

EVK will turn the load switch ON to pass the voltage onto the terminal block J3.

On the other hand, if the attached power adapter does not have a matching voltage/current combination, the BCR device

will indicate a capability mismatch to the power adapter and will turn the load switch OFF. See

Selectors

for details.

Under mismatch conditions, the red FAULT LED D1 turns ON and the VBUS voltage is routed to the VSAFE5V test point

(TP12). See

FAULT LED and Safe 5V Load Switch

CY4533 EZ-PD™ BCR Evaluation Kit Guide, Document Number: 002-25263 Rev. *B

Changing VBUS Voltage and Current Requested

for details.

Kit Operation

VBUS Voltage and Current