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[原创] TI TPS543C20 40A单输出DC-DC电源解决方案

关键词:电源管理 DC/DC转换器 TPS543C20 40A

时间:2017-12-06 10:44:59       作者:TI       来源:中电网

TI公司的TPS543C20是4V-16V输入,输出电压0.6-V到5.5-V输出电流40A的同步降压SWIFT™转换器,具有内部自适应的补偿特性的仿真峰值电流模式控制,单独使用的开关频率300kHz-2MHz,堆栈(输出80A)使用的开关频率300kHz-1MHz.其内部积分器和直接放大斜率跟踪环路,无需在宽频率范围内使用外部补偿,使系统设计十分灵活,密集和简单.主要用在无线和有线通信基础设施设备,企业级服务器,交换机和路由器,企业级存储,SSD, ASIC, SoC, FPGA, DSP内核和I/O电源轨.本文介绍了TPS543C20主要特性,功能框图,应用电路图以及0.9V/40A评估模块PWR799EVM主要特性和指标,电路图,材料清单和PCB设计图.

The TPS543C20 employs an internally compensatedemulated peak current mode control, with a clocksynchronizable, fixed frequency modulator for EMIsensitivePOL. The internal integrator and directlyamplifying ramp tracking loop eliminate the need forexternal compensation over a wide range offrequencies thereby making the system Designflexible, dense, and simple. Optional API and BodyBraking help improve transient performance bysignificantly reducing undershoot and overshoot,respectively. Integrated NexFET™ MOSFETs withlow-loss switching facilitate high efficiency and deliverup to 40 A in a 5 mm x 7 mm PowerStack™ packagewith a layout friendly thermal pad. Two TPS543C20devices can be stacked together to provide up to 80-A point-of-load.

TPS543C20主要特性:

• Internally-compensated Advanced Current ModeControl 40A POL
• Input Voltage Range: 4.0-V to 16.0-V
• Output Voltage Range: 0.6-V to 5.5-V
• Integrated 3.0/0.9-mΩ Stacked NexFET™ PowerStage with lossless Low-Side current sensing
• Fixed Frequency - Synchronization to an ExternalClock and/ or Sync Out
• Pin Strapping Programmable Switching Frequency
– 300 kHz to 2 MHz for Standalone
– 300 kHz to 1 Mhz for Stackable
• Stack 2X for up to 80A with Current share,Voltage share, and CLK Sync
• Pin Strapping Programmable Reference from 0.6V to 1.1 V with 0.5% Accuracy
• Differential Remote Sensing
• Safe Start-Up into Pre-Biased Output
• High accuracy Hiccup Current Limit
• Asynchronous Pulse Injection (API) and BodyBraking
• 40-pin, 5-mm × 7-mm LQFN Package with 0.5-mm Pitch and Single Thermal Pad
• Create a Custom Design Using the TPS543C20With the WEBENCH® Power Designer

TPS543C20应用:

• Wireless and Wired CommunicationsInfrastructure equipment
• Enterprise Servers, Switches, and Routers
• Enterprise Storage, SSD
• ASIC, SoC, FPGA, DSP Core and I/O Rails

图1.TPS543C20功能框图

图2.TPS543C20简化电路图

图3.TPS543C20应用电路:4.5V-16V输入,输出1V/40A转换器

图4.TPS543C20双相可堆栈图

评估模块PWR799EVM

This user’s guide describes the characteristics, operation, and use of the TPS543C20 Evaluation Module(EVM). The user’s guide includes test information, descriptions, and results. A complete schematicdiagram, printed-circuit board layouts, and bill of materials are also included in this document. Throughoutthis user’s guide, the abbreviations EVM, TPS543C20EVM-799, and the term evaluation module aresynonymous with the TPS543C20, unless otherwise noted.

The PWR799EVM is designed as a single output DC-DC converter that demonstrates the TPS543C20 ina typical low-voltage application while providing a number of test points to evaluate the performance. Ituses a nominal 12-V input bus to produce a regulated 0.9-V output at up to 40-A load current.

评估模块PWR799EVM应用:

• Enterprise storage, SSD, NAS
• Wireless and wired communication infrastructure
• Industrial PCs, automation, ATE, PLC, video surveillance
• Enterprise server, switches, routers
• ASIC, SoC, FPGA, DSP core and I/O rails

评估模块PWR799EVM主要特性:

• Regulated 0.9-V output up to 40-A, steady-state output current
• Convenient test points for probing critical waveforms

图5.评估模块PWR799EVM PCB装配图
评估模块PWR799EVM电特性指标:


图6.评估模块PWR799EVM电路图
评估模块PWR799EVM材料清单:



图7.评估模块PWR799EVM PCB顶层装配图

图8.评估模块PWR799EVM PCB顶层焊接图

图9.评估模块PWR799EVM PCB顶层布局图

图10.评估模块PWR799EVM PCB内1层图

图11.评估模块PWR799EVM PCB内2层图

图12.评估模块PWR799EVM PCB内3层图

图13.评估模块PWR799EVM PCB内4层图

图14.评估模块PWR799EVM PCB底层图

图15.评估模块PWR799EVM PCB底层焊接图

图16.评估模块PWR799EVM PCB底层覆盖图
详情请见:
http://www.ti.com/lit/ds/symlink/tps543c20.pdf
http://www.ti.com/lit/ug/sluubk7/sluubk7.pdf
sluubk7.pdf
tps543c20.pdf

 

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