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