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參數(shù)資料
| 型號： | LM3502ITLX-16 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅動器 |
| 英文描述： | Step-Up Converter for White LED Applications |
| 中文描述： | LED DISPLAY DRIVER, PBGA10 |
| 封裝： | 1 MM HEIGHT, BGA-10 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大小： | 928K |
| 代理商： | LM3502ITLX-16 |
Application Information
WHITE LED CURRENT SETTING
The LED current is set using the following equation:
20131730
I
LED
: White LED Current.
V
Fb
: Feedback Pin Voltage. V
Fb
= 0.25V, Typical.
R1:
Currrent Setting Resistor.
WHITE LED DIMMING
For dimming the white LED string with a pulse-width-
modulated (PWM) signal on the Cntrl pin, care must taken to
balance the tradeoffs between audible noise and white LED
brightness control. For best PWM duty cycle vs. white LED
current linearity, the PWM frequency should be between
200Hz and 500Hz. Other PWM frequencies can be used, but
the linearity over input voltage and duty cycle variation will
not be as good as what the 200Hz to 500Hz PWM frequency
spectrum provides. To minimize audible noise interference, it
is recommended that a output capacitor with minimal sus-
ceptibility to piezoelectric induced stresses be used for the
particular applications that require minimal or no audible
noise interference.
If V
OUT2
is not used , En2 must be grounded
20131735
FIGURE 5.
L
www.national.com
13
相關PDF資料 |
PDF描述 |
|---|---|
| LM3502ITL-25 | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:55; Connector Shell Size:32; Connecting Termination:Crimp; Circular Shell Style:Right Angle Plug; Body Style:Right Angle |
| LM3502ITL-16 | GT 7C 7#16S PIN PLUG RTANG |
| LM3502 | Step-Up Converter for White LED Applications |
| LM350A | 3-Amp Adjustable Regulators |
| LM350AT | 3-Amp Adjustable Regulators |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM3502ITLX-16/NOPB | 功能描述:LED照明驅動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| LM3502ITLX-25 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Step-Up Converter for White LED Applications |
| LM3502ITLX-25/NOPB | 功能描述:LED照明驅動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| LM3502ITLX-35 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Step-Up Converter for White LED Applications |
| LM3502ITLX-35/NOPB | 功能描述:LED照明驅動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
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