LP5521TMX/NOPB LED Lighting Drivers Analog/PWM Mixed Dimming, Constant Current, Current Control, I2C Control, Power Save

1.Features

Adaptive Charge Pump With1× and 1.5× Gain Provides Up to 95%LEDDriveEfficiency
• Charge Pump with Soft Start and Overcurrent,Short-Circuit Protection
• Low Input Ripple and EMI
• VerySmallSolutionSize,No Inductoror ResistorsRequired
• 200-nATypicalShutdownCurrent
• AutomaticPowerSaveMode
• I2C-CompatibleInterface
• IndependentlyProgrammableConstantCurrentOutputswith 8-BitCurrentSettingand 8-BitPWMControl
• TypicalLEDOutputSaturationVoltage50 mV andCurrentMatching1%
• ThreeProgramExecutionEngineswith FlexibleInstructionSet
• Autonomous Operation Without External Control
• Large SRAM Program Memory
• Two GeneralPurposeDigitalOutputs

2.Applications

Fun and Indicator Lights
• LCD Sub-Display Backlighting
• Keypad RGB Backlighting and Phone Cosmetics
• Vibra,Speakers,WaveformGenerator
• BloodGlucoseMeter
• HandheldPOSTerminals
• ElectronicAccessControl
• Where RGB Indication is Needed

3.Description

The LP5521is a three-channelLEDdriverdesignedto producevarietyof lightingeffectsfor mobiledevices.A high-efficiencychargepumpenablesLEDdrivingoverfull Li-Ionbatteryvoltagerange.Thedevicehas a programmemoryfor creatingvarietyoflightingsequences.Whenprogrammemoryhas beenloaded,LP5521can operateautonomouslywithoutprocessorcontrolallowingpowersavings

The devicemaintainsexcellentefficiencyovera wideoperatingrangeby automaticallyselectingproperchargepumpgainbasedon LEDforwardvoltagerequirementsandis ableto automaticallyenterpower-savemode,whenLEDoutputsare not activeand thus loweringcurrentconsumption.

ThreeindependentLEDchannelshaveaccurateprogrammablecurrentsourcesandPWMcontrol.Eachchannelhasprogrammemoryfor creatingdesiredlightingsequenceswith PWMcontrol.
TheLP5521has a flexibledigitalinterface.TriggerI/O and a 32-kHzclockinputallowsynchronizationbetweenmultipledevices.Interruptoutputcanbeusedto notifyprocessor,whenLEDsequencehasended.TheLP5521hasfourpin selectableI2C-compatibleaddresses.Thisallowsconnectingup tofour paralleldevicesin one I2C-compatiblebus.GPOand INT pins can be usedas a digitalcontrolpin forotherdevices

TheLP5521requiresonlyfoursmall,low-costceramiccapacitors.
Comprehensiveapplicationtoolsareavailable,includingcommandcompilerfor easyLEDsequenceprogramming

4.Typical Application Circuit

5.Why choose us?

100% new and originao with Advantage price
High efficiency
Fast Delivery
Professional team service
10 Years Experience Electronic components
Electronic components Agent
Advantage logistic discount
Excellent After-sales Service

Shenzhen Hongxinwei Technology Co., Ltd is located in the Bao’an District of Shenzhen.It is a high-tech enterprise setting research and development, production, sales into an integration. The company covers an area of 15 acres, having modern producing workshop and professional production and testing equipments. The company has an existing staff of more than 100 people.The company has set up offices in Shenzhen, Hongkong and Singapore providing worldwide service.