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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)： | 13/14頁 |
| 文件大?。?/td> | 963K |
| 代理商： | LM3520 |
Application Information
(Continued)
tor is sufficient for the main-display. A minimum of 4.7μF
output capacitor is recommended for V
SUB
output. Larger
output capacitor can be used to reduce ripple voltage. The
LM3520 has a maximum OVP of 24.2V, a 25V minimum
rated capacitor voltage is recommended for the application
to ensure proper biasing.
Local bypassing for the input is needed on LM3520. Multi-
layer ceramic capacitors with low ESR are a good choice for
this as well. A 10 μF capacitor is sufficient for most applica-
tions. Using larger capacitance decreases input voltage
ripple on the input. Extra attention is required if smaller case
size capacitor is used in the application. Smaller case size
capacitor typically has less capacitance for a given bias
voltage as compared to a larger case size capacitor with the
same bias voltage. Please contact the capacitor manufac-
turer for detail information regarding capacitance verses
case size. Table 3 lists several capacitor suppliers.
TABLE 3.
Suppliers
TDK
Website
www.tdk.com
Suppliers
AVX
Murata
Website
www.avxcorp.com
www.murata.com
LAYOUT CONSIDERATIONS
As for any high frequency switcher, it is important to place
the external components as close as possible to the IC to
maximize device performance. Below are some layout rec-
ommendations: 1) Place input filter and output filter capaci-
tors close to the IC to minimize copper trace resistance
which will directly effect the overall ripple voltage. 2) Place
the feedback network resistors in the Main and Sub display
close to the IC. 3) Route noise sensitive trace away from
noisy power components. 4) Connect the ground pins and
filter capacitors together via a ground plane to prevent
switching current circulating through the ground plane. Simi-
larly the ground connection for the feedback network should
tie directly to GND plane. If no ground plan is available, the
ground connections should tie directly to the device GND
pin. Additional layout consideration regarding the LLP pack-
age can be found in Application AN1187
L
www.national.com
13
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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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