TI TPS65980 Thunderbolt总线供电单端口外设参考设计
TI公司的TPS65980是Thunderbolt总线供电的DC/DC开关稳压器,输入电压2.5V-17.5V,三个单独的3.3V输出电压.具有限流和热关断特性,主要用在Thunderbolt/Thunderbolt™ 2系统,总线供电系统,电源管理系统.本文介绍了TPS65980主要特性,功能框图, Thunderbolt单/双端口应用电路, 评估模块TPS65980EVM主要特性,电路图,材料清单和PCB元件布局图,以及Thunderbolt™单端口外设参考设计主要特性,电路图,材料清单和PCB元件布局图.
The TPS65980 DC/DC switching regulator that receives power from a Thunderbolt™ or Thunderbolt™ 2 power bus ranging from 2.5-V to 15.75-V and generates three separate 3.3-V supply outputs.
The TBT_OUT supply provides power to the local peripheral Thunderbolt™ controller and support circuitry. The CBL_OUT supply provides power back to the Thunderbolt™ cable and has adjustable current limit. The DEV_OUT supply provides power to all other circuitry in the device to perform its designed function.
The TPS65980 is available in a 24-pin 5mm x 4mm x 0.9mm VQFN package.
TPS65980主要特性:
Powered From Thunderbolt™ Bus
2.5-V to 15.75-V Input
3.3-V Outputs
Cable Power Out Current Limit
Thermal Shutdown
TPS65980应用:
Thunderbolt/Thunderbolt™ 2 Systems
Bus Powered Systems
Power Management Systems
图1. TPS65980功能框图
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