TPS2H000-Q1: 电流参数咨询

您好！

手册中的三个电流参数不理解么参数的含义，麻烦解答下！

Nominal dc load current：不理解此参数含义？

Internal current limit：CL管脚接地的时候，配置的电流限制为1A~1.6A，超过1.6A一定会过载保护，关断输出，是这么理解吗？1A~1.6A是只的两个通到加起来，还是一个通道？

Current limit during thermal shutdown：短路时候电流限制，CL设置的时候是60%设置的限流值，不设置是内部0.8A，是这么理解吗？但是这个参数和Internal current limit参数好像不兼容，例如我电流限制CL设置的是1A，按照1A*60%=0.6A，那我负载使用是超过0.6A就会被热关断吗？

Links：

您好

第1和第2个问题，见下面的链接

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1400269/tps4h000-q1-current-capability-confirmation

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/562871/tps4h000-q1-tps4h000-q1-current-per-channel-is-beween-1-0a-to-1-6a-or-is-this-the-devices-total

第三个问题，请将问题发布在E2E英文技术论坛上（ https://e2e.ti.com/p/addpost  ).将由资深的英文论坛工程师为您提供帮助

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?? ?：

您好！

第一个问题和第二个问题的链接我看了，但是里面还是没有回复到我的问题，我的问题如下：

Nominal dc load current是0.75A，如果CL接GND时候电流限制最小是1A最大1.8A，在这种情况下，如果我的负载是0.9A，芯片会关断输出吗？电流限制值我应该看Nominal dc load current还是Internal current limit？这两个参数的区别是什么？

,

?? ?：

您好！

TI官方主页里面也是写了Imax是0.75A，但是电流限制又是可调最大到1.3A，所以不理解到底是看哪个值电流限制值来判断负载超过是否会关断输出？

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Links：

Nominal dc load current是0.75A即当所有通道都启用时，可以工作的电流位0.75A。这是基于 JEDEC 2s2p 布局的。利用最坏情况，内部模拟了此配置。

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/953497/tps4h000-q1-current-limit

请将问题发布在E2E英文技术论坛上（ https://e2e.ti.com/p/addpost  ).将由资深的英文论坛工程师为您提供帮助 

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?? ?：

您好！

芯片还有一个热摆动功能的热关断，摆动的T(hys)是10℃，但是对于我们的实际使用的设备，PCB板上的负载会随时打开和关闭，这样就会导致整个板载温度都在变化，很容易就因为热摆动而关断输出了，热摆动功能的热关断是否能关闭掉这个检测？但是下图还写了一句Thermal Behavior After Short to GND，所以热摆动是在输出短路到地的时候才开始诊断吗，正常使用的时候温度变化大没有影响？

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Links：

请将问题发布在E2E英文技术论坛上（ https://e2e.ti.com/p/addpost  ).将由资深的英文论坛工程师为您提供帮助 

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