Highest Efficiency Supply for 2 to 6 Series WLEDs in a 2mm x 2mm TDFN Package

General Description The MAX8901A/MAX8901B step-up converters drive from two to six series-connected white LEDs (WLEDs) with constant current to provide uniform WLED intensity for LCD backlighting in cell phones, PDAs, and other handheld devices. The MAX8901_ operate at a fixed 750kHz (typ) switch

文件：298.58 Kbytes 頁數(shù)：15 Pages

MAXIM

美信

Highest Efficiency Supply for 2 to 6 Series WLEDs in a 2mm x 2mm TDFN Package

General Description The MAX8901A/MAX8901B step-up converters drive from two to six series-connected white LEDs (WLEDs) with constant current to provide uniform WLED intensity for LCD backlighting in cell phones, PDAs, and other handheld devices. The MAX8901_ operate at a fixed 750kHz (typ) switch

文件：298.58 Kbytes 頁數(shù)：15 Pages

MAXIM

美信

Highest Efficiency Supply for 2 to 6 Series WLEDs in a 2mm x 2mm TDFN Package

文件：303.04 Kbytes 頁數(shù)：14 Pages

MAXIM

美信

效率最高的2至6只串聯(lián)WLED供電電源，2mm x 2mm TDFN封裝

MAX8901A/MAX8901B升壓轉(zhuǎn)換器能夠以固定電流驅(qū)動(dòng)2至6只串聯(lián)白光LED (WLED)，為手機(jī)、PDA和其它手持設(shè)備提供亮度均勻的WLED驅(qū)動(dòng)，用于LCD背光。MAX8901_工作在750kHz (典型值)固定開關(guān)頻率，允許采用小尺寸外部元件，經(jīng)過優(yōu)化處理能夠在1節(jié)鋰離子/鋰聚合物電池的整個(gè)電壓范圍保持最高效率。\n\n 這兩款轉(zhuǎn)換器采用單個(gè)輸入(ON)使能IC并控制WLED亮度。MAX8901A采用直接PWM輸入調(diào)節(jié)LED亮度，LED電流正比于PWM占空比。MAX8901B采用單線、串行脈沖調(diào)光，提供32級線性調(diào)節(jié)的LED亮度。利用脈沖串調(diào)光時(shí)，滿量程LED電流為24. ? 效率高達(dá)91% \n? 2.6V至5.5V輸入電壓范圍\n? 固定頻率工作模式\n? 能夠驅(qū)動(dòng)2至6只串聯(lián)WLED，1.3% LED電流精度\n? 靈活的調(diào)光控制\n? 直接PWM調(diào)光(MAX8901A)\n? 32級、單線串行調(diào)光(MAX8901B)\n\n\n? 輸入欠壓鎖存\n? 輸入過壓鎖存\n? WLED過壓保護(hù)(25V典型值)\n? 0.01μA (典型值)關(guān)斷電流\n? 關(guān)斷模式下沒有WLED電流\n? 內(nèi)部軟啟動(dòng)和熱關(guān)斷;

ADI

亞德諾

Package：8-WFDFN 裸露焊盤；包裝：卷帶（TR）剪切帶（CT）Digi-Reel? 得捷定制卷帶 類別：集成電路（IC） LED 驅(qū)動(dòng)器 描述：IC LED DRVR RGLTR PWM 25MA 8TDFN

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