Six-String White LED Driver with Active Current Balancing for LCD Panel Applications

General Description The MAX8790 is a high-efficiency driver for white light emitting diodes (LEDs). It is designed for large liquid crystal displays (LCDs) that employ an array of LEDs as the light source. A current-mode step-up controller drives up to six parallel strings of multiple series-conn

文件：456.2 Kbytes 頁數(shù)：24 Pages

MAXIM

美信

高效率、6串白光LED (WLED)驅(qū)動器，提供有效電流均衡，用于LCD平板顯示器

MAX8790是一款高效白光發(fā)射二極管(LED)驅(qū)動器。該驅(qū)動器專為使用LED陣列作為光源的大型液晶顯示器(LCD)設(shè)計(jì)。電流模式升壓控制器可同時(shí)驅(qū)動具有多個(gè)LED串聯(lián)的6串LED。每串LED都連接至恒流源可實(shí)現(xiàn)±1.5%的電流調(diào)節(jié)精度，以確保所有LED的亮度均勻。MAX8790工作于4.5V至26V寬輸入電壓范圍，可為LED提供固定的20mA電流，或可調(diào)的15mA至25mA電流。\n MAX8790具有兩種亮度調(diào)整控制模式，以適應(yīng)各種應(yīng)用。在直接DPWM模式下，PWM信號可直接接通或斷開LED電流。在模擬亮度調(diào)整模式下，內(nèi)置鎖相環(huán)(PLL)電路首先將PWM信號轉(zhuǎn)換為模擬信號，然后線性 \n? 可同時(shí)驅(qū)動并聯(lián)的6串LED，每串可包含多個(gè)LED \n? LED串之間的電流調(diào)整精度為±1.5% \n? 滿偏電流狀態(tài)下，低至450mV的反饋電壓有助于提高效率 \n? 升壓控制器可將輸出電壓調(diào)整到剛好高于LED串所需的最高電壓 \n? 滿偏LED電流可在15mA至25mA范圍內(nèi)調(diào)節(jié)，或者預(yù)置為20mA \n? 可實(shí)現(xiàn)100:1的寬范圍亮度調(diào)整 \n? 可編程亮度調(diào)整控制：直接DPWM模式或模擬亮度調(diào)整模式 \n? 內(nèi)置鎖相環(huán)可用于同步亮度調(diào)整控制 \n? LED開路和短路保護(hù) \n? 輸出過壓保護(hù) \n? 4.5V至26V寬輸入電壓范圍 \n? 外部MOSFET允許每串包含大;

ADI

亞德諾

Six-String White LED Driver with Active Current Balancing for LCD Panel Applications

General Description The MAX8790A is a high-efficiency driver for white light emitting diodes (LEDs). It is designed for large liquid crystal displays (LCDs) that employ an array of LEDs as the light source. A current-mode step-up controller drives up to six parallel strings of multiple series-con

文件：430.71 Kbytes 頁數(shù)：23 Pages

MAXIM

美信

Six-String White LED Driver with Active Current Balancing for LCD Panel Applications

General Description The MAX8790A is a high-efficiency driver for white light emitting diodes (LEDs). It is designed for large liquid crystal displays (LCDs) that employ an array of LEDs as the light source. A current-mode step-up controller drives up to six parallel strings of multiple series-con

文件：430.71 Kbytes 頁數(shù)：23 Pages

MAXIM

美信

Six-String White LED Driver with Active Current Balancing for LCD Panel Applications

General Description The MAX8790 is a high-efficiency driver for white light emitting diodes (LEDs). It is designed for large liquid crystal displays (LCDs) that employ an array of LEDs as the light source. A current-mode step-up controller drives up to six parallel strings of multiple series-conn

文件：456.2 Kbytes 頁數(shù)：24 Pages

MAXIM

美信

MAX8790A Evaluation Kit

文件：177.4 Kbytes 頁數(shù)：11 Pages

MAXIM

美信

6串白光LED)驅(qū)動器，提供有效電流均衡，適用于LCD面板

MAX8790A是一款高效白光發(fā)光二極管(LED)驅(qū)動器。該驅(qū)動器專為采用LED背光的大規(guī)模液晶顯示器(LCD)設(shè)計(jì)。電流模式升壓控制器可同時(shí)驅(qū)動多個(gè)LED串聯(lián)的6串LED。每串LED都連接至恒流源，可實(shí)現(xiàn)±1.5%的電流調(diào)節(jié)精度，確保均勻的LED亮度。MAX8790A工作于4.5V至26V寬輸入電壓范圍，可為LED提供固定的20mA電流或可調(diào)的15mA至27mA電流。\n MAX8790A具有兩種亮度調(diào)整控制模式，適合不同的應(yīng)用。在直接DPWM模式下，PWM信號可直接接通或斷開LED電流。在模擬亮度調(diào)整模式下，內(nèi)置鎖相環(huán)(PLL)電路首先將PWM信號轉(zhuǎn)換成模擬信號，然后線性控制LED \n? LED串之間的電流調(diào)整精度為±1.5% \n? 升壓控制器可將輸出電壓調(diào)整到剛好高于LED串所需的最高電壓 \n? 可實(shí)現(xiàn)100:1的寬范圍亮度調(diào)整 \n? 內(nèi)置PLL可用于同步亮度控制 \n? 輸出過壓保護(hù) \n? 外部MOSFET允許每串具有多個(gè)LED \n? 小型、20引腳、4mm x 4mm薄型QFN封裝;

ADI

亞德諾

Package：20-WFQFN 裸露焊盤；包裝：管件 類別：集成電路（IC） LED 驅(qū)動器 描述：IC LED DRVR CTRL PWM 27MA 20TQFN

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亞德諾

包裝：散裝 類別：開發(fā)板，套件，編程器 評估板 - LED 驅(qū)動器 描述：EVAL KIT FOR MAX8790A

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亞德諾

Package：20-WFQFN 裸露焊盤；包裝：管件 類別：集成電路（IC） LED 驅(qū)動器 描述：IC LED DRVR CTRL PWM 25MA 20TQFN

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