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| 型号： | LP5521TMEV |
| 厂商： | National Semiconductor |
| 文件页数： | 1/44页 |
| 文件大小： | 0K |
| 描述： | EVAL BOARD FOR LP5521 |
| 标准包装： | 1 |
| 系列： | * |
| 其它名称： | Q5109809 |
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SNVS441F – JANUARY 2007 – REVISED FEBRUAY 2013
LP5521 Programmable Three-Channel LED Driver
Check for Samples: LP5521
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FEATURES
DESCRIPTION
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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
DSBGA-20 Package, 0.4 mm Pitch
Bumped WQFN-24 Package, 0.5 mm Pitch
The LP5521 is a three-channel LED driver designed
to produce variety of lighting effects for mobile
devices. High efficiency 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 memory 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
programmable 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-
compatible addresses. This allows connecting up to
four parallel devices in one I 2 C-compatible bus. GPO
and INT pins can be used as a digital control pin for
other devices.
APPLICATIONS
? Fun / Indicator Lights
? LCD Sub-Display Backlighting
LP5521 requires only four small and low cost ceramic
capacitors.
LP5521 is available in tiny 2.1x1.7x0.6 mm DSBGA-
20 package and in 4.0 x 5.0 x 0.8 mm bumped
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Keypad RGB Backlighting and Phone
Cosmetics
Vibra, Speakers, Waveform Generator
WQFN-24 package.
Comprehensive application tools are available,
including command compiler for easy LED sequence
programming.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright ? 2007–2013, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LP5521TMX | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Programmable Three Channel LED Driver |
| LP5521TMX/NOPB | 功能描述:LED照明驱动器 RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| LP5521YQ | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Programmable Three Channel LED Driver |
| LP5521YQ/NOPB | 功能描述:LED照明驱动器 3 Ch Prog Led Driver LLP RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| LP5521YQ/S7002688 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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