參數(shù)資料
型號(hào)： LP5521YQ
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 顯示驅(qū)動(dòng)器
英文描述： Programmable Three Channel LED Driver
中文描述： LED DISPLAY DRIVER, QCC24
封裝： 5 X 4 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, LLP-24
文件頁(yè)數(shù)： 1/14頁(yè)
文件大?。?/td> 247K
代理商： LP5521YQ
June 2007
LP5521
Programmable Three Channel LED Driver
General Description
The LP5521 is a three channel LED driver designed to pro-
duce variety of lighting effects for mobile devices. High effi-
ciency charge pump enables LED driving over full Li-Ion
battery voltage range. The device has a program memory for
creating variety of lighting sequences. When program mem-
ory has been loaded, LP5521 can operate independently
without processor control.
LP5521 maintains excellent efficiency over a wide operating
range by automatically selecting proper charge pump gain
based on LED forward voltage requirements. LP5521 is able
to automatically enter power-save mode, when LED outputs
are not active and thus lowering current consumption.
Three independent LED channels have accurate pro-
grammable current sources and PWM control. Each channel
has program memory for creating desired lighting sequences
with PWM control.
LP5521 has a flexible digital interface. Trigger I/O and 32 kHz
clock input allow synchronization between multiple devices.
Interrupt output can be used to notify processor, when LED
sequence has ended. LP5521 has four pin selectable I
2
C ad-
dresses. This allows connecting up to four parallel devices in
one I
2
C bus. GPO and INT pins can be used as a digital con-
trol pin for other devices.
LP5521 requires only four small and low cost ceramic capac-
itors.
LP5521 is available in tiny 2.1x1.7x0.6 mm microSMD-20
package and in 4.0x5.0x0.8 mm bumped LLP-24 package.
Comprehensive application tools are available, including
command compiler for easy LED sequence programming.
Features
■
Adaptive charge pump with 1x and 1.5x gain provides up
to 95% LED drive efficiency
■
Charge pump with soft start and overcurrent/short circuit
protection
■
Low input ripple and EMI
■
Very small solution size, no inductor or resistors required
■
200 nA typical shutdown current
■
Automatic power save mode
■
I
2
C compatible interface
■
Independently programmable constant current outputs
with 8-bit current setting and 8-bit PWM control
■
Typical LED output saturation voltage 50 mV and current
matching 1%
■
Three program execution engines with flexible instruction
set
■
Autonomous operation without external control
■
Large SRAM program memory
■
Two general purpose digital outputs
■
microSMD-20 package, 0.4 mm pitch
■
Bumped LLP-24 package, 0.5 mm pitch
Applications
■
Fun / indicator lights
■
LCD sub-display backlighting
■
Keypad RGB backlighting and phone cosmetics
■
Vibra, speakers, waveform generator
Typical Application
20186270
2007 National Semiconductor Corporation
201862
www.national.com
L
相關(guān)PDF資料
PDF描述
LP5521YQX Programmable Three Channel LED Driver
LP5522 Programmable LED Driver
LP5522TM Programmable LED Driver
LP5522TMX Programmable LED Driver
LP55271TL Tiny LED Driver for Camera Flash and 4 LEDs with I2C Programmability, Connectivity Test and Audio Synchronization
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LP5521YQ/NOPB 功能描述:LED照明驅(qū)動(dòng)器 3 Ch Prog Led Driver LLP 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
LP5521YQ/S7002688 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:
LP5521YQX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Programmable Three Channel LED Driver
LP5521YQX/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
LP5522 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Programmable LED Driver
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*