Datasheet > LP5521

LP5521

更新时间： 2024-09-24 11:12:03

品牌	Logo	应用领域
德州仪器 - TI		驱动泵存储驱动器
页数	文件大小	规格书
51页	1066K
描述
具有内部程序存储器和集成电荷泵的 3 通道 RGB/白色 LED 驱动器

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LP5521

SNVS441I –JANUARY 2007–REVISED NOVEMBER 2016

LP5521 Three-Channel RGB, White-LED Driver With Internal Program Memory and

Integrated Charge Pump

1 Features

3 Description

The LP5521 is a three-channel LED driver designed

to produce variety of lighting effects for mobile

devices. A 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 autonomously without

processor control allowing power savings.

•

Adaptive Charge Pump With 1× and 1.5× 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

The device maintains excellent efficiency over a wide

operating range by automatically selecting proper

charge pump gain based on LED forward voltage

requirements and is able to automatically enter

power-save mode, when LED outputs are not active

and thus lowering current consumption.

•

200-nA Typical Shutdown Current

Automatic Power Save Mode

I²C-Compatible Interface

Independently Programmable Constant Current

Outputs with 8-Bit Current Setting and 8-Bit PWM

Control

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.

•

Typical LED Output Saturation Voltage 50 mV and

Current Matching 1%

Three Program Execution Engines with Flexible

Instruction Set

The LP5521 has a flexible digital interface. Trigger

I/O and a 32-kHz clock input allow synchronization

between multiple devices. Interrupt output can be

used to notify processor, when LED sequence has

ended. The LP5521 has four pin selectable I²C-

compatible addresses. This allows connecting up to

four parallel devices in one I²C-compatible bus. GPO

and INT pins can be used as a digital control pin for

other devices.

•

Autonomous Operation Without External Control

Large SRAM Program Memory

Two General Purpose Digital Outputs

2 Applications

•

Fun and Indicator Lights

LCD Sub-Display Backlighting

Keypad RGB Backlighting and Phone Cosmetics

Vibra, Speakers, Waveform Generator

Blood Glucose Meter

The LP5521 requires only four small, low-cost

ceramic capacitors.

Comprehensive application tools are available,

including command compiler for easy LED sequence

programming.

Handheld POS Terminals

Electronic Access Control

Device Information⁽¹⁾

Where RGB Indication is Needed

PART NUMBER

LP5521TM

PACKAGE

DSBGA (20)

WQFN (24)

BODY SIZE

Typical Application Circuit

2.093 mm × 1.733 mm (MAX)

5.00 mm × 4.00 mm (NOM)

C_FLY1

C_FLY2

LP5521YQ

0.47 µF

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

C_OUT

1 µF

CFLY1P

VDD

CFLY1N

CFLY2P

CFLY2N

VOUT

C_IN

1 µF

RGB LED 0...25.5 mA/LED

SCL

SDA

LP5521

MCU

CLK_32K

INT

TRIG

GPO

ADDR_SEL0

ADDR_SEL1

GNDs

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...51

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LP5521 替代型号

型号	品牌	替代类型	描述	数据表
LP5562	TI	功能相似	具有内部程序存储器和独立通道控制的 4 通道 RGB/白光 LED 驱动器
LP55231	TI	功能相似	LP55231 Programmable 9-Output LED Driver
LP5523	TI	功能相似	Programmable 9-Output LED Driver

与LP5521相关器件

型号	品牌	获取价格	描述	数据表
LP5521TM	NSC	获取价格	Programmable Three Channel LED Driver
LP5521TM/NOPB	NSC	获取价格	IC LED DISPLAY DRIVER, PBGA20, 2.10 X 1.70 MM, 0.60 MM HEIGHT, 0.40 MM PITCH, ROHS COMPLIA
LP5521TM/NOPB	TI	获取价格	具有内部程序存储器和集成电荷泵的 3 通道 RGB/白色 LED 驱动器 \| YFQ \|
LP5521TMX	NSC	获取价格	Programmable Three Channel LED Driver
LP5521TMX/NOPB	NSC	获取价格	IC LED DISPLAY DRIVER, PBGA20, 2.10 X 1.70 MM, 0.60 MM HEIGHT, 0.40 MM PITCH, ROHS COMPLIA
LP5521TMX/NOPB	TI	获取价格	具有内部程序存储器和集成电荷泵的 3 通道 RGB/白色 LED 驱动器 \| YFQ \|
LP5521YQ	NSC	获取价格	Programmable Three Channel LED Driver
LP5521YQ/NOPB	TI	获取价格	具有内部程序存储器和集成电荷泵的 3 通道 RGB/白色 LED 驱动器 \| NJA \|
LP5521YQX	NSC	获取价格	Programmable Three Channel LED Driver
LP5521YQX/NOPB	NSC	获取价格	IC LED DISPLAY DRIVER, QCC24, 5 X 4 MM, 0.80 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, LLP

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