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參數(shù)資料
| 型號： | LM3520 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | Integrated White LED Driver with Organic LED Display Power Supply |
| 中文描述： | 集成白光LED有機(jī)LED顯示屏驅(qū)動電源 |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 963K |
| 代理商： | LM3520 |
LM3520
Integrated White LED Driver with Organic LED Display
Power Supply
General Description
The LM3520 is a dual step-up DC/DC converter, designed to
drive up to 5 white LEDs with a constant current and to
power an organic LED display with a constant voltage.
A single external resistor is used to set the maximum LED
current. The LED current can be adjusted by applying a
PWM signal to the EN pin. For higher efficiency the LM3520
operates with pulse frequency modulation (PFM) control
scheme when the sub-display is enabled. When Main dis-
play is enabled, the device is operating in PWM mode.
Overvoltage protection circuitry and a 1MHz switching fre-
quency allow for the use of small, low cost external compo-
nents.
Additional features include a low-side NFET switch that can
turn off the LED string with no DC current path to ground.
The LM3520 is available in a small 14-pin thermally-
enchanced LLP package.
Features
n
Integrated OLED and white-LED driver
n
80% efficiency
n
Drives up 5 LEDs at 20mA/3.6V and 4 LEDs at
30mA/3.6V for main-display
n
Up to 20V
@
50mA/3.6V for sub-display
n
True shutdown isolation
n
Small External Components
n
1 MHz Switching Frequency
n
23V OverVoltage Protection
n
Wide Input Voltage Range: 2.7V to 5.5V
n
Cycle-By-Cycle Current Limit
n
PWM Dimming Control
n
Low Profile 14-Pin LLP(3mm x 4mm x 0.8mm)
Applications
n
Flip-phones/Clam-shell Cellular Phones
n
Handheld Devices
n
High-fashion cellular phones
n
White LED Backlighting
n
Digital Cameras
Typical Applications
20128803
Main Display with OLED Sub Display
PRELIMINARY
February 2005
L
2005 National Semiconductor Corporation
DS201288
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3520_0509 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Integrated White LED Driver with Organic LED Display Power Supply |
| LM3520B WAF | 制造商:Texas Instruments 功能描述: |
| LM3520SD | 制造商:Texas Instruments 功能描述:WLED/OLED DRIVER POWERWISE LLP-14 |
| LM3520SD | 制造商:Texas Instruments 功能描述:IC WLED/DISPLAY DRIVER POWERWISE |
| LM3520SD/NOPB | 功能描述:IC LED DRVR WT/OLED BCKLGT 14LLP RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?PWM，切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:642kHz 電源電壓:2.7 V ~ 5.5 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-VSON 包裝:剪切帶 (CT) 工作溫度:-30°C ~ 85°C 產(chǎn)品目錄頁面:1371 (CN2011-ZH PDF) 其它名稱:BD1603NUV-E2CT |
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