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20221119-实例HI3516A底板PowerTree提取_pcb生成power tree

pcb生成power tree

第一章节Initial Setup开始设置

1.1 打开文件;

(1),使用Cadence Sigrity 2019版本Power DC

(2),依旧选用PCB文件HI3516APERB_VER_B_PCB.brd

第二章节PowerTree Setup开始设置

2.1 One-step to Create Workspace;

(1),VRM and Sink Information(.csv) 可以导入CSV文件;

Topology Extraction Rules (Optional)(.xml) 导入拓扑文件xml;

AMM Library (Optional) 导入AMM电容或者元件的模型库;

(2),Launch Power Tree

2.2 Extract Power Tree in Design提取设计中电源树;

(1),使用Extract Power Tree in Design 打开Starting Components窗口:

(2),先设置电源输入网络12V的Input端口,位号J6.2的网络“$5N461

2.3 结合原理图设置DC-DC/Components;

(1),使用原理图Hi3516APERB_VER_B_SCH.pdf

(2),设置如下:设置好6个DC-DC/Components。

(3),Eport……导出CSV文件,并且保存:

(4),点击OK,弹出 Build Power Tree对话框:

(5),Build Power Tree—Components type identification元器件类型识别规则:

Build Power Tree—Settings for topology extraction拓扑提取设置规则

(6),Build Tree……:

右击White Background/Black Background切换

(7),点击Switch to Hierarchy view mode切换到层级视图,预览整个设计PowerTree:

点击View/Hide Decaps 电容的显示和隐藏:

(8),选中元器件Q9,右击Ignore Component 忽略元器件。

2.4 PowerTree Setup—Apply PowerTree--;

(1),点击Apply PowerTree……

预览下Output下Error:

Error/Warning message:

Warning: The discrete is connected with power and ground net. RefDes 'R199' has been ignored.

Warning: The resistance is not specified for RefDes R36 between pin 2 and 1

Warning: The resistance is not specified for RefDes R35 between pin 2 and 1

Warning: The resistance is not specified for RefDes R77 between pin 2 and 1

Warning: The resistance is not specified for RefDes R153 between pin 2 and 1

Warning: The resistance is not specified for RefDes R211 between pin 1 and 2

Warning: The resistance is not specified for RefDes LB10 between pin 1 and 2

Warning: The resistance is not specified for RefDes LB11 between pin 1 and 2

(2),依旧选用PCB文件HI3516APERB_VER_B_PCB.brd

做PowerTree的目的是设置我们仿真电流密度和电压降跌落参数,主要是为了生成VRM、SINK等这些电流和电热仿真参数,比如电源、负载、串联电感,利用PowerTree来自动生成。

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