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| NCP5386B單－雙相處理器電源解決方案 |
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| 文章來源： 更新時間：2014/5/13 13:05:00 |
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On Semi公司的NCP5386B是單/雙相降壓控制器,滿足Intel的VR 10.0和11.0以及AMD指標,雙沿PWM和電感電流傳感降低了系統成本,對瞬態負載有最快的響應,1.0V-1.6V的系統精度為0.5%,開關頻率在100 kHz － 1.0 MHz, 主要用在臺式計算機的處理器和芯片組,服務器處理器和芯片組和DDR電源.本文介紹了NCP5386B主要特性,框圖,單相/雙相應用電路,以及評估板25VT6A5VGEVB主要特性,電路圖,材料清單和PCB元件布局圖.
The NCP5386 is a one− or two−phase buck controller which combines differential voltage and current sensing, and adaptive voltage positioning to power both AMD and Intel processors and chipsets. Dual−edge pulse−width modulation (PWM) combined with inductor current sensing reduces system cost by providing the fastest initial response to transient load events. Dual−edge multi−phase modulation reduces total bulk and ceramic output capacitance required to satisfy transient load−line regulation.
A high performance operational error amplifier is provided, which allows easy compensation of the system. The proprietary method of Dynamic Reference Injection makes the error amplifier compensation virtually independent of the system response to VID changes, eliminating tradeoffs between overshoot and dynamic VID performance.
NCP5386B主要特性:
• Meets Intel’s VR 10.0 and 11.0, and AMD Specifications
• No load Intel VR Offset of −19 mV (NCP5386), +20 mV (NCP5386A), and 0 mV (NCP5386B)
• Dual−Edge PWM for Fastest Initial Response to Transient Loading
• High Performance Operational Error Amplifier
• Supports both VR11 and Legacy Soft−Start Modes
• Dynamic Reference Injection (Patent# 7057381)
• DAC Range from 0.5 V to 1.6 V
• _0.5% System Voltage Accuracy from 1.0 V to 1.6 V
• True Differential Remote Voltage Sensing Amplifier
• Phase−to−Phase Current Balancing
• “Lossless” Differential Inductor Current Sensing
• Differential Current Sense Amplifiers for each Phase
• Adaptive Voltage Positioning (AVP)
• Frequency Range: 100 kHz – 1.0 MHz
• OVP with Resettable, 8 Event Delayed Latch
• Threshold Sensitive Enable Pin for VTT Sensing
• Power Good Output with Internal Delays
• Programmable Soft−Start Time
• This is a Pb−Free Device*
NCP5386B應用:
• Desktop Processors and Chipsets
• Server Processors and Chipsets
• DDR
圖1. NCP5386B簡化框圖
圖2. NCP5386B兩相應用電路圖
圖3. NCP5386B單相應用電路圖
評估板25VT6A5VGEVB
The 25VT6A5VGEVB evaluation board is designed such that it can accommodate a 1x1 to a 2x2 combination of MOSFETs, for _8−FL and SO8−FL packages. Depending on the type of application and necessity, any combination of the above packages can be used. The 25VT6A5VGEVB evaluation board is designed to operate with an input voltage ranging from 8 V to 16 V, and to provide an output voltage of 0.8 V to 1.8 V for load currents of up to 25 A. The 25VT6A5VGEVB comes with a 5 V driver. The 25VT6A5VGEVB evaluation board has a number of test points that can be used to evaluate its performance in any given application.
評估板25VT6A5VGEVB主要特性:
• 8 V to 16 V Input Voltage
• 25 A of Steady State Load Current
• 500 kHz Switching Frequency
• Access to IC Features such as Enable, Switching Node and VID Settings for Output Voltage
• Convenient Test Points for Simple, Non−invasive Measurements of Converter Performance Including Input Ripple, Output Ripple, High Side and Low Side Gate Signals and Switching Node
評估板25VT6A5VGEVB應用:
• Synchronous Buck Converters
♦ High Frequency Applications
♦ High Current Applications
♦ Low Duty Cycle Applications
• Multi−phase Synchronous Buck Converters
♦ Evaluation Board has only One Phase Implemented
圖4. 評估板25VT6A5VGEVB外形圖
圖5. 評估板25VT6A5VGEVB電路圖
評估板25VT6A5VGEVB材料清單:
圖6. 評估板25VT6A5VGEVB PCB元件布局圖:頂層
圖7. 評估板25VT6A5VGEVB PCB元件布局圖:底層 |
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