本文介紹了ZXLD1374主要特性,以及多種應(yīng)用電路和相應(yīng)的材料清單(BOM).

Diodes公司的ZXLD1374是高精度60V 1.5A LED驅(qū)動(dòng)器轉(zhuǎn)換器,它集成了1.5A低邊開關(guān),輸出電流精度0.5%,工作電壓6.3V-60V,LED驅(qū)動(dòng)器支持降壓,升壓和降-升壓模式,DC調(diào)光為20:1,500Hz時(shí)調(diào)光為1000:1,開關(guān)頻率高達(dá)1MHz,主要用于大電流LED驅(qū)動(dòng).

ZXLD1374主要特性:

• 0.5% typical output current accuracy

• 6.3 to 60V operating voltage range

• 1.5A integrated low side switch

• LED driver supports Buck, Boost and Buck-boost topologies

• Wide dynamic range dimming

20:1 DC dimming

1000:1 dimming range at 500Hz

• Up to 1MHz switching

• High temperature control of LED current using TADJ

• Green mold compound (No Br, Sb) and RoHS Compatible
 

圖1.ZXLD1374降壓配置框圖

圖2.ZXLD1374升壓和降壓-升壓配置框圖

圖3.ZXLD1374典型應(yīng)用電路圖

圖4.ZXLD1374過壓保護(hù)(OVP)電路圖

圖5.ZXLD1374電路布局圖

圖6.ZXLD1374 1.5A降壓LED驅(qū)動(dòng)器電路圖
1.5A降壓LED驅(qū)動(dòng)器材料清單(BOM):


圖7.ZXLD1374 350mA升壓LED驅(qū)動(dòng)器電路圖
350mA升壓LED驅(qū)動(dòng)器材料清單(BOM):


圖8.ZXLD1374 350mA降壓-升壓LED驅(qū)動(dòng)器電路圖

350mA降壓-升壓LED驅(qū)動(dòng)器材清單(BOM):