标签: USB Power Delivery E

百佳泰于 2023 年 6 月 9 日获得 USB-IF 协会授权，正式取得 USB Power Delivery EPR 认证资格 。 相关认证要求的测试项目以及测试设备如下： 目前可取证的USB Power Delivery EPR产品种类尚有限制， USB-IF 要求认证产品只能够有一个 USB Type-C® port 为 EPR capable source port 。以下两项目前无法取证的产品为例： 产品上除了有EPR capable source port也有EPR capable sink port 产品上除了有EPR capable source port也有SPR capable source port 除了上述限制外，另一点须留意的是： 因为 EPR 的 AVS 为必需要支持的功能 , 所以不允许不支持 AVS 的 EPR capable source port 取证 。 最新 USB-IF compliance updates 如下： ㊀ Deprecation of EHCI Testing. USB2CV and EHCI IOP ㊁ Decrease to One Test Equipment Solution for SPR Products 注意事项： EX-350只支持Protocol相关测项, 故需要另外用其他设备补测Physical & Power相关测项 ㊂ The USB-IF has recently confirmed that the RFI tests will not be applicable to hubs for the time being 注意事项： The temporary waiver can be granted by USB-IF until February, Y2024 ㊃ FRS & USB4 should be run in the latest USB Power Delivery CTS for informational purpose ㊄ TEST.PD.PROT.ALL3.8 in the latest USB Power Delivery CTS 注意事项： Respond with the correct revision: Pass Respond with Not Supported: Temporary Waiver Respond with nothing: Fail ㊅ COMMON.CHECK.PD.9 in the latest USB Power Delivery CTS PD CTS update 详细信息： PD Spec. update 详细信息： 注意事项： The CTS will always be testing against the most current version of the base CTS. Any failures relating to previous versions will go through the waiver process ㊆ Define Vbus slew rate measurements in the latest USB Power Delivery CTS 详细信息： ◈ Affected Test item ➱ PD.PS.SRC.1 Multiple Request Load Test ➱ PD.PS.SRC.2 PDO Transitions ➱ PD.PS.SNK.3 Multiple Request Load Test Post PR Swap ◈ Vbus slew rate measurements (Appendix E) ➱ Turn all filtering and sample averaging off and work only with the raw signal samples ➱ Collect data samples with rate at least 20uS/Sample ➱ Start collecting signal samples after receiving Accept Message and before sending the last bit of GoodCRC Message. Record the Voltage Level as V1 ➱ Stop collecting signal samples upon receiving PS_RDY Message. Record the Voltage Level as V2. – Calculate the difference ΔV = |V2 – V1| ➱ If ΔV < 3.5V, the slew rate measurement could not be accurately calculated, and the measurement disregarded. ➱ V1) or getting below V2 + 0.9*ΔV + for the Negative Transitions (V2< V1) and corresponding sample number Sn_A from the last bit of GoodCRC– point A ➱ Find the first sample that exceeds V1 + 0.9* ΔV + for the Positive Transitions or getting below V2 + 0.1*ΔV + for the Negative Transitions and corresponding sample number Sn_B from the last bit of GoodCRC – point B ➱ Find SR = (Vpoint_B – Vpoint_A)/(Sn_B – Sn_A)*R ㊇ Remove the monotonicity requirement 详细信息： Affected Test item SPT.1 Load Test in USB Type-C and PD Source Power Requirements CTS If USB-IF QuadraMax reports the monotonicity issue, the vendors can ignore it and no waiver is required ㊈ Update to PPS Requirements 详细信息： Affected Test item SPT.6 PPS Voltage Step Test in USB Type-C and PD Source Power Requirements CTS If USB-IF QuadraMax reports the min voltage issue (3.3V), the vendors can request a wavier USB Type-C®and USB-C® are registered trademarks of USB Implementers Forum.