MT7201C+是一(yi)款連續導通模式的(de)(de)降壓(ya)(ya)型LED恒流驅動芯片(pian)。在輸入(ru)電壓(ya)(ya)高(gao)于LED電壓(ya)(ya)時，能有效地(di)驅動一(yi)顆或多顆串(chuan)聯的(de)(de)LED。MT7201C+支持6V~50V的(de)(de)輸入(ru)電壓(ya)(ya)，輸出電流可調，最高(gao)可達(da)1.2A。

MT7201C+內置(zhi)功(gong)率(lv)開關(guan)(guan)管和一個高端(duan)電(dian)(dian)(dian)(dian)流檢測電(dian)(dian)(dian)(dian)路(lu)，可通(tong)(tong)過(guo)(guo)外部電(dian)(dian)(dian)(dian)阻設置(zhi)LED平均電(dian)(dian)(dian)(dian)流，并通(tong)(tong)過(guo)(guo)ADJ引腳接(jie)收模擬調光和PWM調光信(xin)號(hao)。芯片(pian)內置(zhi)PWM濾波電(dian)(dian)(dian)(dian)路(lu)，該電(dian)(dian)(dian)(dian)路(lu)能通(tong)(tong)過(guo)(guo)控制電(dian)(dian)(dian)(dian)流的(de)(de)上升(sheng)沿從(cong)而(er)實現軟啟動。軟啟動的(de)(de)時(shi)間(jian)可通(tong)(tong)過(guo)(guo)在ADJ引腳與地之(zhi)間(jian)增加一個外部電(dian)(dian)(dian)(dian)容來延長。當ADJ引腳電(dian)(dian)(dian)(dian)壓低于0.2V時(shi)，功(gong)率(lv)開關(guan)(guan)管截止(zhi)，MT7201C+將進(jin)入(ru)極(ji)低工作電(dian)(dian)(dian)(dian)流的(de)(de)待(dai)機狀態(tai)。

• 極少的外圍器件

• 高達1.2A的恒電流輸出(chu)

• 單一引腳(jiao)實現(xian)開/關、模擬調光和PWM調光

• 內含PWM濾波器

• 降低EMI的抖頻(pin)技術(shu)

• 效率高達97%

• 寬輸入(ru)電壓(ya)范圍：6V~50V

• 最大1MHz開關頻率(lv)

• LED開路保護

• 輸出(chu)電流精度：±5%

• SOT89-5封裝