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參數(shù)資料
| 型號(hào)： | LM4970 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | LED驅(qū)動(dòng)器 |
| 英文描述： | Audio Synchronized Color LED Driver |
| 中文描述： | 音頻同步彩色LED驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 1/15頁(yè) |
| 文件大?。?/td> | 726K |
| 代理商： | LM4970 |
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LM4970
Audio Synchronized Color LED Driver
General Description
The LM4970 is a LED driver with an audio synchronization
mode that virtually eliminates the need for real time software
processing for LED lighting effects. The LM4970 includes
three individual PWM color LED drivers that provide up to
42mA of current drive for each PWM LED output.
The LM4970 features an audio synchronization mode where
the audio input signal that is mixed in from three audio inputs
is filtered into three frequency bands, with each frequency
band assigned to a specific PWM LED driver.
The PWM LED drivers can also be directly programmed
through an I
2
C compatible interface for applications where
user defined LED pattern, color, and intensity programmabil-
ity is a priority.
The LM4970 also features an audio input gain control which
allows the user to increase the gain if the audio input signal
does not create a bright enough effect on the LEDs. The
LM4970 is a feature rich LED driver that is available in a
space saving 14 pin non-pullback LLP package.
Key Specifications
j
LED Drive Current per channel
V
DD
= 5V
j
Shutdown Current, V
DD
= 5V
42mA (2X setting)
1.5μA (typ)
Features
n
Audio synchronized color LED driver
n
User defined LED pattern, color, and intensity capability
n
Programmable:
LED Drive current
PWM frequency
High pass filter frequency select
Audio input signal gain
n
Eliminates external LED current limiting resistors
n
I
2
C compatible interface
n
Ultra low shutdown current
Applications
n
Cell Phones
n
Portable MP3, CD, DVD, AAC players
n
PDA’s
Block Diagram
Boomer
is a registered trademark of National Semiconductor Corporation.
20121201
FIGURE 1. Block Diagram
February 2005
L
2005 National Semiconductor Corporation
DS201212
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4970SD | 功能描述:LED照明驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LM4970SD/NOPB | 功能描述:LED照明驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LM4970SD/NOPB | 制造商:Texas Instruments 功能描述:IC, LED DRIVER, BOOST, LLP-10 |
| LM4970SDBD | 功能描述:音頻 IC 開發(fā)工具 LM4970 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| LM4970SDX | 功能描述:LED照明驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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