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參數資料
| 型號： | LP55271 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Tiny LED Driver for Camera Flash and 4 LEDs with I2C Programmability, Connectivity Test and Audio Synchronization |
| 中文描述： | 微小的LED照相機閃光燈和4的I2C可編程性，連接測試和音頻同步發光二極管驅動器 |
| 文件頁數： | 1/21頁 |
| 文件大?。?/td> | 826K |
| 代理商： | LP55271 |
LP55271
Tiny LED Driver for Camera Flash and 4 LEDs with I
2
C
Programmability, Connectivity Test and Audio
Synchronization
General Description
The LP55271 is a lighting management unit for handheld
devices with I
2
C compatible control interface. The LP55271
has a step-up DC/DC converter with high current output and
it drives display and keypad backlights and powers the cam-
era flash LED. In addition the DC/DC converter has the
output current to power for example an audio amplifier si-
multaneously. The chip has four 8-bit programmable high
efficiency constant current LED drivers and a FLASH LED
driver. Built-in audio synchronization feature allows the user
to synchronize one of the LEDs to audio input.
The LP55271 has an integrated 370 mA flash driver with a
safety stop feature and 46 mA torch mode. An external
enable pin is provided for the synchronizing the flash with the
camera action. An external software independent test inter-
face provides a fast way to find a broken path or short on
LED circuits. Very small microSMD package together with
minimum number of external components is a best fit for
handheld devices.
Features
n
High current boost DC-DC converter (up to 1A output
current)
n
Programmable boost output voltage
n
370 mA flash LED constant current driver with low
tolerance and a safety circuit
n
Synchronization pin for the flash timing
n
Two single-ended audio inputs with gain control
n
Four constant current 15 mA LED drivers with 8-bit
programmable brightness control
n
Audio synchronization feature
n
I
2
C compatible control interface
n
Built-in LED connectivity test to maximize manufacturing
yield
n
Small microSMD-30 package (2.5 mm x 3.0 mm x 0.6
mm)
Applications
n
Camera FLASH, funlight and backlight driving in battery
powered devices
Typical Application
20202401
September 2006
L
2
C
T
2006 National Semiconductor Corporation
DS202024
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LP5527 | Tiny LED Driver for Camera Flash and 4 LEDs with I2C Programmability, Connectivity Test and Audio Synchronization |
| LP5527TL | Tiny LED Driver for Camera Flash and 4 LEDs with I2C Programmability, Connectivity Test and Audio Synchronization |
| LP5527TLX | Tiny LED Driver for Camera Flash and 4 LEDs with I2C Programmability, Connectivity Test and Audio Synchronization |
| LP55281 | Quad RGB Driver |
| LP55281RL | Quad RGB Driver |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LP55271TL | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Tiny LED Driver for Camera Flash and 4 LEDs with I2C Programmability, Connectivity Test and Audio Synchronization |
| LP55271TL/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 |
| LP55271TLX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Tiny LED Driver for Camera Flash and 4 LEDs with I2C Programmability, Connectivity Test and Audio Synchronization |
| LP55271TLX/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 |
| LP5527TL | 制造商:Texas Instruments 功能描述:DRIVER FLASH LED I2C POWERWISE |
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