LP8501_14 Datasheet, PDF (1/8 Pages) Texas Instruments – PRODUCT BRIEF Multi-Purpose 9-Output LED Driver

LP8501
www.ti.com
SNVS548B – SEPTEMBER 2008 – REVISED NOVEMBER 2008
LP8501 PRODUCT BRIEF Multi-Purpose 9-Output LED Driver
Check for Samples: LP8501
FEATURES
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•2 Three independent program execution engines
for user 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; I_VDD = 10 µA
(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
DESCRIPTION
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 power-save mode when LED outputs are not
active, thus lowering idle current consumption down to 10 µA (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).
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
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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.
All trademarks are the property of their respective owners.
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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 © 2008, Texas Instruments Incorporated