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| TPS65980 Thunderbolt總線供電單端口外設參考設計 |
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| 文章來源： 更新時間：2014/8/4 10:00:00 |
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TI公司的TPS65980是Thunderbolt總線供電的DC/DC開關穩壓器,輸入電壓2.5V-17.5V,三個單獨的3.3V輸出電壓.具有限流和熱關斷特性,主要用在Thunderbolt/Thunderbolt™ 2系統,總線供電系統,電源管理系統.本文介紹了TPS65980主要特性,功能框圖, Thunderbolt單/雙端口應用電路, 評估模塊TPS65980EVM主要特性,電路圖,材料清單和PCB元件布局圖,以及Thunderbolt™單端口外設參考設計主要特性,電路圖,材料清單和PCB元件布局圖.
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應用:
Thunderbolt/Thunderbolt™ 2 Systems
Bus Powered Systems
Power Management Systems
圖1. TPS65980功能框圖
圖2. TPS65980典型應用電路(單端總線供電Thunderbolt器件)
圖3. TPS65980典型應用電路(雙端總線供電Thunderbolt器件)
評估模塊TPS65980EVM
The Texas Instruments TPS65980EVM evaluation module (EVM) helps designers evaluate the operation and performance of the TPS65980: a DC/DC switching regulator that receives power from a Thunderbolt bus ranging from 2.5V to 15.75V on TBT_IN and generates three separate 3.3V supply outputs TBT_OUT, CBL_OUT, and DEV_OUT.
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.
評估模塊TPS65980EVM主要特性:
Powered from Thunderbolt Bus
2.5V to 15.75V Input
3.3V Outputs
Cable Power Out Current Limit
Thermal Shutdown
圖4. 評估模塊TPS65980EVM外形圖
圖5. 評估模塊TPS65980EVM電路圖
評估模塊TPS65980EVM材料清單:
圖6. 評估模塊TPS65980EVM PCB元件布局圖
Thunderbolt™單端口外設參考設計
The TI Thunderbolt™ Single Port Peripheral reference design is optimized for Thunderbolt 2 systems which have a bandwidth of 20Gbps. The design utilizes the TPS65980 power management unit to reduce the BOM cost up to 50% and reduce the area about 40% over a discrete implementation. This design has been tested and certified at Intel for both self power and bus powered single port Thunderbolt systems.
Thunderbolt™單端口外設參考設計主要特性:
Tested & Certified Thunderbolt Design for Bus & Self-Powered Peripherals
Provides a low cost and simple optimized design
TPS65980 PMU powers the needed supplies and provides system control signals
PCIe Connector for quick proto-typing w/ expansion cards
Design guide and high level schematics provided
圖7. Thunderbolt™單端口外設參考設計外形圖
圖8. Thunderbolt™單端口外設參考設計電路圖
Thunderbolt™單端口外設參考設計材料清單:
圖9. Thunderbolt™單端口外設參考設計PCB元件布局圖 |
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