其它物料還有：
內(nèi)置MOS降壓型大功率LED恒流驅(qū)動器 QX9921
QX9921是一款高效率，穩(wěn)定可靠的高亮度LED燈恒流驅(qū)動控制芯片，內(nèi)置高精度比較器，固定關(guān)斷時(shí)間控制電路，恒流驅(qū)動電路等，特別適合大功率、多個(gè)高亮度LED燈串的恒流驅(qū)動。
QX9921采用固定關(guān)斷時(shí)間的峰值電流控制方式，其工作頻率最高可達(dá)1MHz，可使外部電感和濾波電容體積減小，效率提高，節(jié)省PCB面積。關(guān)斷時(shí)間可通過外部電容進(jìn)行調(diào)節(jié)，工作頻率也可根據(jù)用戶要求進(jìn)行調(diào)節(jié)。在EN端加PWM信號，可調(diào)節(jié)LED燈的亮度。
QX9921通過調(diào)節(jié)外置電流檢測電阻的阻值來設(shè)置流過LED燈的電流，支持外加電壓線性調(diào)光，流過LED燈的電流可從幾十毫安到2.5安培變化。
QX9921采用ESOP8封裝，散熱片內(nèi)置接SW腳。
DG2001DV-T1DMG6602SVT-7
DTA114YKAF
ESDA17-5SC6
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