1747-L541 ADI公司的ADP1614是一種內(nèi)部集成輸出達(dá)到20V電壓的功率開關(guān)的升壓型，ADP1614采用外部電阻的設(shè)置限制輸出電流的大小，ADP1614采用兩個固定的激勵開關(guān)頻率，分別為650KHz和1.3MHz。ADP1614在對空間有約束力的應(yīng)用中占有很大優(yōu)勢，常用于便攜式產(chǎn)品中。ADP1614具有在電流模式下PWM效率達(dá)到94％，使能器件可調(diào)軟開關(guān)保護(hù)涌入電流，在此通過總結(jié)ADP1614器件的特點(diǎn)，介紹器件，特性，應(yīng)用方向及內(nèi)部結(jié)構(gòu)布局，并給參考設(shè)計實(shí)例原理圖，制板圖及元器件清單。
ADP1614是一款升壓型DC-DC開關(guān)轉(zhuǎn)換器，集成了電源開關(guān)，可提供高達(dá)20 V的輸出電壓。ADP1614的引腳可調(diào)電流限制可通過外部電阻設(shè)置。升壓開關(guān)頻率固定為650 kHz或1.3 MHz。ADP1614的封裝高度為0.8 mm，非常適合空間受限的應(yīng)用，例如便攜式設(shè)備或薄膜晶體管（TFT）液晶顯示器（LCD）。
ADP1614采用電流模式脈沖寬度調(diào)制（PWM），效率高達(dá)94％。啟用部件時，可調(diào)軟啟動可防止涌入電流。PWM電流模式架構(gòu)可提供出色的瞬態(tài)響應(yīng)，輕松的噪聲過濾以及使用小型，節(jié)省成本的外部電感器和電容器。其他關(guān)鍵功能包括欠壓鎖定（UVLO），熱關(guān)斷（TSD）和邏輯控制使能。
ADP1614采用無鉛，10引腳引線框架芯片級封裝（LFCSP）。
ADP1614的主要特性：
可調(diào)電流限值，4 A
2.5 V至5.5 V輸入電壓范圍
650 kHz或1.3 MHz固定頻率選項(xiàng)
可調(diào)輸出電壓，20 V
可調(diào)軟啟動
欠壓鎖定
熱關(guān)斷
3 mm×3 mm，10引腳LFCSP，
由ADIsimPower設(shè)計工具支持
ADP1614應(yīng)用：
TFT LCD偏置電源
便攜式應(yīng)用
工業(yè)/儀器設(shè)備
圖1。ADP1614外形圖
ADP1614參考設(shè)計的主要特性：
2.5 V至5.5 V輸入電壓范圍
650 kHz或1.3 MHz固定頻率選項(xiàng)
可調(diào)限流，4 A ADP1614-650-EVALZ的
輸出電壓
5
V（ADP1614-1.3-EVALZ的
跳線）用于使能/關(guān)斷控制，
針對指示的輸出電壓進(jìn)行了優(yōu)化的組件
1747-L541
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