TI中文支持网Part Number:TUSB213
TUSB213IRGYR 问题描述如下
1.TRC test verification results
|
No. |
offseg |
MU-CU extersion cable |
Disconnect threhod/DC boost |
NG or OK? |
|
1 |
WW502060 |
DTEN send(without change) |
580mV/80mV |
NG |
|
2 |
WW502060 |
TRC cable with changing DC boost |
580mV/40mV |
OK |
|
3 |
WW502060 |
DTEN send(without change) |
620mV/80mV |
NG |
|
4 |
WW502060 |
TRC cable without changing |
580mV/80mV |
OK |
|
5 |
WUA00953 |
DTEN send(without change) |
580mV/80mV |
NG |
|
6 |
WUA00953 |
TRC cable without changing |
580mV/80mV |
OK |
从以上USB拷贝测试的交叉验证结果来看，NG现象跟随客户寄回的MU-CU延长线。因此，TRC怀疑是延长线的个体问题，针对延长线做了眼图测试，测试结果是NG的。
From the cross validation results of the USB copy test above, it can be seen that the NG phenomenon follows the MU-CU extension cable sent back by the customer. Therefore, TRC suspected that it was an individual issue with the extension cord and conducted eye graph tests on the extension cord, which resulted in NG results.
另外，我们对客诉的USB延长线束，连接主单元之后测试了DP信号的直流电压，测试结果是414mV。使用正常的USB延长线束，连接主单元之后测试的DP直流电压是489mV。由此怀疑客诉的USB延长线束redriver功能没有作用。
In addition, we tested the DC voltage of the DP signal after connecting the USB extension harness mentioned by the customer to the main unit, and the test result was 414mV. Using a normal USB extension harness, the DP DC voltage tested after connecting to the main unit is 489mV. Therefore, it is suspected that the USB extension harness rediscover function complained by the customer is ineffective.
2.Harness teardown analysis（No power）—电阻测试（不带电
|
PIN No. |
Name |
Resistance to ground(Normal)(Ω) |
Resistance to ground(sample)(Ω) |
Note |
|
1 |
EQ |
375K |
374K |
Normal |
|
2 |
NC |
Can’t detect |
Can’t detect |
Normal |
|
3 |
NC |
Can’t detect |
Can’t detect |
Normal |
|
4 |
DC_BOOST |
35K |
35.5K |
Normal |
|
5 |
D2P |
4M |
4M |
Normal |
|
6 |
D2M |
4M |
4M |
Normal |
|
7 |
GND |
0 |
0 |
Normal |
|
8 |
VREG |
18.5K |
18.9K |
Normal |
|
9 |
D1M |
4M |
4M |
Normal |
|
10 |
D1P |
4M |
4M |
Normal |
|
11 |
SDA |
∞ |
∞ |
Normal |
|
12 |
VCC |
64K |
60K |
Normal |
|
13 |
SCL |
∞ |
∞ |
Normal |
|
14 |
RSTN |
2M |
2M |
Normal |
电阻测试结果表明：Redriver板焊接是正常的。
The resistance test results indicate that the welding of the Redriver board is normal.
3.Harness teardown analysis（With power）—电阻测试（带电）
|
PIN No. |
Name |
Resistance to ground(Normal)(Ω) |
Resistance to ground(sample)(Ω) |
Note |
|
1 |
EQ |
506.6K |
501.6K |
|
|
2 |
NC |
∞ |
∞ |
|
|
3 |
NC |
∞ |
∞ |
|
|
4 |
DC_BOOST |
∞ |
43K |
|
|
5 |
D2P |
99.8Ω |
85Ω |
|
|
6 |
D2M |
91.7Ω |
78Ω |
|
|
7 |
GND |
0 |
0 |
|
|
8 |
VREG |
∞ |
∞ |
|
|
9 |
D1M |
92.7Ω |
83Ω |
|
|
10 |
D1P |
101.4Ω |
89Ω |
|
|
11 |
SDA |
∞ |
514K |
|
|
12 |
VCC |
∞ |
∞ |
|
|
13 |
SCL |
∞ |
513K |
|
|
14 |
RSTN |
∞ |
∞ |
4.Harness teardown analysis—电压测试
|
PIN No. |
Name |
Resistance to ground(Normal)(V) |
Resistance to ground(sample)(V) |
Note |
|
1 |
EQ |
0.01 |
0.00 |
Normal |
|
2 |
NC |
– |
– |
Normal |
|
3 |
NC |
– |
– |
Normal |
|
4 |
DC_BOOST |
3.282 |
3.279 |
Normal |
|
5 |
D2P |
– |
– |
Normal |
|
6 |
D2M |
– |
– |
Normal |
|
7 |
GND |
0.00 |
0.00 |
Normal |
|
8 |
VREG |
1.778 |
0.00 |
Abnormal |
|
9 |
D1M |
– |
– |
Normal |
|
10 |
D1P |
– |
– |
Normal |
|
11 |
SDA |
2.38 |
0 |
Abnormal |
|
12 |
VCC |
5.03 |
5.09 |
Normal |
|
13 |
SCL |
3.278 |
0 |
Abnormal |
|
14 |
RSTN |
3.135 |
3.176 |
Normal |
问题疑点：因为Redriver内部的电源无输出，导致redriver工作异常。
Suspect point: Due to the lack of output from the internal power supply of the Redriver, it is causing abnormal operation of the Redriver.
5.Harness teardown analysis—问题疑点分析
|
步骤Step |
操作Activity |
测试现象Test phenomenon |
说明Note |
|
在客诉样品上更换Redriver芯片。（AàB） Replace the Redriver chip on the customer complaint sample. （AàB） |
1.在客诉样品上拆除redriver芯片。 2.在客诉样品上更换新的redriver芯片。 3.在客诉样品上测试芯片各管脚电压。 1. Remove the Redriver chip from the customer complaint sample. 2. Replace the Redriver chip with a new one on the customer complaint sample. 3. Test the voltage of each pin of the chip on the customer complaint sample. |
更换redriver芯片后，芯片各管脚电压正常，芯片内部电源输出正常。 After replacing the Redriver chip, the voltage at each pin of the chip is normal, and the internal power output of the chip is normal. |
更换redriver芯片后，USB线束工作状态正常。证明redriver芯片损坏。 After replacing the Redriver chip, the USB harness is working normally. Prove that the Redriver chip is damaged. |
|
在正常线束上更换客诉样品拆下来的芯片（BàA） Replace the chip removed from the customer complaint sample on the normal wiring harness (B → A) |
1.将客诉样品拆下来的热的redriver芯片更换到正常线束上。 2.测试芯片各管脚电压。 1. Replace the hot Redriver chip removed from the customer complaint sample with the normal wiring harness. 2. Test the voltage of each pin of the chip. |
Redriver芯片内部电源无输出。 The internal power supply of the Redriver chip has no output. |
redriver芯片工作不正常。问题现象跟随redriver芯片转移。证明redriver芯片损坏。 The Redriver chip is not working properly. The problem phenomenon follows the transfer of the Redriver chip. Prove that the Redriver chip is damaged. |
Kailyn Chen：
您好，看了您的分析过程，可以判断是TUSB213 内部LDO输出不正常，以及SDA，SCL不正常导致的问题。
更换芯片之后能正常工作。
那么您的问题是什么?
,
Jianping Tian：
已经进行了AB和BA测试，就是这个芯片出问题了，初步分析，目前走的是Bypass，没有走High Speed Compensation，正常的芯片走的是High Speed Compensation，谢谢
,
Kailyn Chen：
那您实际应用是高速吗？高速模式，然后加延长线，应该是需要高速补偿High Speed Compensation。
如果是低速或中速，即为bypass mode。
出问题的芯片如果走High Speed Compensation，能正常工作吗？
,
Jianping Tian：
是配置高速的，出问题的芯片初步判断没有走High Speed Compensation，现在需要寻求解决方案，请您支持下，谢谢
,
weiqiang zhang：
您好：
经过交叉验证，我们也判断是TUSB213内部LDO没有输出，导致redriver功能没有起到作用。因为这根线是客户端反馈过来的，客户希望我们对失效的芯片进行解析，以便找出失效的原因并且在以后的生产过程中得到改善。
谢谢！
,
Kailyn Chen：
要求做失效分析的话，我这边需要咨询下我们相关的人员，再次确认下，会尽快给您答复。
,
weiqiang zhang：
好的。期待您的回复！谢谢
,
Kailyn Chen：
您好，关于您的问题，请联系负责您的公司的TI联系人。
