LP8501 LP8501 PRODUCT BRIEF Multi-Purpose 9-Output LED Driver Literature Number: SNVS548B LP8501 PRODUCT BRIEF Multi-Purpose 9-Output LED Driver General Description Features The LP8501 is a LED driver with 9 outputs, designed to produce versatile lighting effects for mobile devices. The device is equipped with an internal program memory, which allows operation without processor control. Internal program memory is used by three independent program execution engines to produce user defined lighting effects for the outputs. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The excellent efficiency over a wide operating range is achieved by autonomously selecting the best charge pump gain based on LED forward voltage requirements. LP8501 is able to automatically enter powersave mode when LED outputs are not active, thus lowering idle current consumption down to 10 A (typ.) The device has a flexible General Purpose Output (GPO), which can be used for example as a digital control pin for other devices. INT pin (interrupt function), which can be used to notify processor. Trigger input interface, which allows program execution start without I2C write. The device requires only four small and low-cost ceramic capacitors. The LP8501 is available in a tiny 25-bump 2.27 mm x 2.27 mm x 0.60 mm micro SMD package (0.4 mm pitch). Three independent program execution engines for user Notice: This document is not a full datasheet. For more information regarding this product or to order samples, please contact your local National Semiconductor sales office or visit http://www.national.com/support/dir.html defined programs with large SRAM memory for storing lighting programs 9 programmable source (high side) driver outputs with 25.5 mA full-scale current, 8-bit current setting resolution and 12-bit PWM control resolution Flexible grouping possibility for all 9 outputs including GPO into three groups with group PWM and Fade in/ Fade out controls Built-in LED test Adaptive charge pump with 1x and 1.5x gain provides up to 95% LED drive efficiency and with soft start and overcurrent/short circuit protection Automatic power save mode; IVDD = 10 A (typ.) Two wire, I2C-compatible, control interface Small application circuit Pin-configured LED powering for LEDs 1 to 6 and for LEDs 7 to 9 Solution area <18 mm2 Applications Fun lights and indicator lights LED backlighting and color keypad lighting Programmable current source Haptic feedback driver and GPIO expander Typical Application 30041901 (c) 2008 National Semiconductor Corporation 300419 www.national.com LP8501 PRODUCT BRIEF November 20, 2008 LP8501 PRODUCT BRIEF For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Design Support Amplifiers www.national.com/amplifiers WEBENCH(R) Tools www.national.com/webench Audio www.national.com/audio App Notes www.national.com/appnotes Clock and Timing www.national.com/timing Reference Designs www.national.com/refdesigns Data Converters www.national.com/adc Samples www.national.com/samples Interface www.national.com/interface Eval Boards www.national.com/evalboards LVDS www.national.com/lvds Packaging www.national.com/packaging Power Management www.national.com/power Green Compliance www.national.com/quality/green Switching Regulators www.national.com/switchers Distributors www.national.com/contacts LDOs www.national.com/ldo Quality and Reliability www.national.com/quality LED Lighting www.national.com/led Feedback/Support www.national.com/feedback Voltage Reference www.national.com/vref Design Made Easy www.national.com/easy PowerWise(R) Solutions www.national.com/powerwise Solutions www.national.com/solutions Serial Digital Interface (SDI) www.national.com/sdi Mil/Aero www.national.com/milaero Temperature Sensors www.national.com/tempsensors Solar Magic(R) www.national.com/solarmagic Wireless (PLL/VCO) www.national.com/wireless Analog University(R) www.national.com/AU THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION ("NATIONAL") PRODUCTS. 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