原标题：TI CSD86350Q5D高效大电流降压电源解决方案

　　TI 公司的csd86350Q5D是NexFET™半桥区块,25A时的效率90%,高达40A,工作频率高达1.5MHz,5V栅极驱动,RoHS兼容,主要用在同步降压转换器,大电流低占空比电源,多相同步降压转换器,POL DC/DC转换器,以及IMVP, VRM和VRD应用.本文介绍了CSD86350Q5D主要特性, 典型应用框图以及CSD86350Q5DEVM-604评估板主要特性,电路图和材料清单,元件布局图.

　　The CSD86350Q5D NexFET™ power block is an optimized design for synchronous buck applications offering high current, high efficiency, and high frequency capability in a small 5-mm × 6-mm outline. Optimized for 5V gate drive applications, this product offers a flexible solution capable of offering a high density power supply when paired with any 5V gate drive from an external controller/driver.

　　CSD86350Q5D主要特性:

　　Half-Bridge Power Block

　　90% system Efficiency at 25A

　　Up To 40A Operation

　　High Frequency Operation (Up To 1.5MHz)

　　High Density – SON 5-mm × 6-mm Footprint

　　Optimized for 5V Gate Drive

　　Low Switching Losses

　　Ultra Low Inductance Package

　　RoHS Compliant

　　Halogen Free

　　Pb-Free Terminal Plating

　　CSD86350Q5D应用:

　　Synchronous Buck Converters

　　High Frequency Applications

　　High Current, Low Duty Cycle Applications

　　Multiphase Synchronous Buck Converters

　　POL DC-DC Converters

　　IMVP, VRM, and VRD Applications

　　图1.CSD86350Q5D框图

　　图2.CSD86350Q5D典型应用框图

　　CSD86350Q5DEVM-604评估板

　　The CSD86350Q5DEVM-604 evaluation module (EVM) is a synchronous buck converter featuring TI’s NexFET™ Power Block technology to provide a high current, ultra-high density power supply solution. The EVM provides a 1.2V output at 25A from a 12V nominal input bus at over 92% efficiency. The EVM is designed to operate from a single supply, so no additional bias voltage is required. The EVM uses the TPS51218 high performance, mid-input voltage, synchronous buck controller and TI’s NexFET™ Power Block to optimize the efficiency and power density of the total solution.

　　The CSD86350Q5DEVM-604 is designed to use a regulated 12V (8V – 13V) bus voltage to provide a regulated 1.2V output at up to 25A of load current. The CSD86350Q5DEVM-604 is designed to demonstrate the CSD86350Q5D NexFET™ Power Block in a typical 12V bus to low-voltage application, while providing a number of non-invasive test points to evaluate the performance of the CSD86350Q5D NexFET™ Power Block in a given application.

　　CSD86350Q5DEVM-604评估板主要特性:

　　• 8V to 13V input voltage rating

　　• 1.2V output voltage

　　• 25A steady state load current

　　• 290 kHz switching frequency

　　• Simple access to IC features including enable, power good, and switching node

　　• Convenient test points for simple, non-invasive measurements of converter performance including input ripple, output ripple, and switching node

　　CSD86350Q5DEVM-604评估板应用:

　　• Synchronous Buck Converters

　　– High Frequency Applications

　　– High Current, Low Duty Cycle Applications

　　• Multiphase Synchronous Buck Converters

　　• POL DC-DC Converters

　　图3.CSD86350Q5DEVM-604评估板电路图

　　CSD86350Q5DEVM-604评估板材料清单(BOM):