Yaskawa JANCD-10O3E LTC3787是一款高性能PolyPhase單輸出同步升壓轉換器控制器,該驅動器異相驅動兩個N溝道功率MOSFET級。多相操作減少了對輸入和輸出電容器的要求,并允許使用比單相等效電路更小的電感器。同步整流可提高效率,減少功率損耗并簡化散熱要求,從而實現高功率升壓應用。
4.5V至38V的輸入電源范圍涵蓋了廣泛的系統架構和電池化學組成。當從升壓轉換器的輸出或另一個輔助電源偏置時,LTC3787可以在啟動后從低至2.5V的輸入電源工作。可以將工作頻率設置為50kHz至900kHz范圍,或使用內部PLL同步到外部時鐘。
多相操作允許將LTC3787配置為2相,3相,4相,6相和12相操作。
在啟動期間,SS引腳使輸出電壓斜坡上升。PLLIN / MODE引腳選擇突發模式。操作,輕載時的脈沖跳躍模式或強制連續模式。
LTC3787主要特性:
兩相操作降低了所需的輸入和輸出電容,并降低了電源感應的噪聲
同步操作,以實現最高的效率并降低了散熱
寬VIN范圍:4.5V至38V(40V Abs值),并在啟動后降至2.5V上升
輸出電壓高達60V
±1%1.200V參考電壓
RSENSE或電感器DCR電流感應
100%占空比能力,用于同步MOSFET
低靜態電流:135μA
鎖相頻率(75kHz至850kHz)
可編程固定頻率(50kHz至900kHz)
電源良好的輸出電壓監控器
低關斷電流,IQ 《8μA
內部LDO為來自VBIAS或EXTVCC的柵極驅動
供電熱增強型薄型28引腳4mm x 5mm
QFN封裝狹窄的SSOP封裝
LTC3787應用:
工業
汽車
醫療
圖1.LTC3787框圖
圖2.LTC3787 12相工作連接圖
圖3.LTC3787高效2相24V升壓轉換器電路圖
圖4.LTC3787高效2相48V升壓轉換器電路圖
圖5.LTC3787高效2相36V升壓轉換器電路圖
Yaskawa JANCD-10O3E
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