management unit. LP5527 Datasheet

LP5527 unit. Datasheet pdf. Equivalent

Part LP5527
Description lighting management unit
Feature www.DataSheet4U.com May 2006 LP5527 Tiny LED Driver for Camera Flash and 4 LEDs with I2C Programmab.
Manufacture National Semiconductor
Datasheet
Download LP5527 Datasheet



LP5527
www.DataSheet4U.com
May 2006
LP5527
Tiny LED Driver for Camera Flash and 4 LEDs with I2C
Programmability, Connectivity Test and Audio
Synchronization
General Description
The LP5527 is a lighting management unit for handheld
devices with I2C compatible control interface. The LP5527
has a step-up DC/DC converter with high current output and
it drives display and keypad backlights and powers the cam-
era flash LED. In addition the DC/DC converter has the
output current to power for example an audio amplifier si-
multaneously. The chip has four 8-bit programmable high
efficiency constant current LED drivers and a FLASH LED
driver. Built-in audio synchronization feature allows the user
to synchronize one of the LEDs to audio input.
The LP5527 has an integrated 400 mA flash driver with a
safety stop feature and 50 mA torch mode. An external
enable pin is provided for the synchronizing the flash with the
camera action. An external software independent test inter-
face provides a fast way to find a broken path or short on
LED circuits. Very small microSMD package together with
minimum number of external components is a best fit for
handheld devices.
Features
n High current boost DC-DC converter (up to 1A output
current)
n Programmable boost output voltage
n 400 mA flash LED constant current driver with low
tolerance and a safety circuit
n Synchronization pin for the flash timing
n Two single-ended audio inputs with gain control
n Four constant current 15 mA LED drivers with 8-bit
programmable brightness control
n Audio synchronization feature
n I2C compatible control interface
n Built-in LED connectivity test to maximize manufacturing
yield
n Small microSMD-30 package (2.5 mm x 3.0 mm x 0.6
mm)
Applications
n Camera FLASH, funlight and backlight driving in battery
powered devices
Typical Application
© 2006 National Semiconductor Corporation DS201840
20184001
www.national.com



LP5527
www.DataSheet4U.com
Connection Diagrams and Package Mark Information
Connection Diagrams microSMD-30 package, 2.466 x 2.974 x 0.60 mm body size, 0.5 mm pitch NS Package Number
TLA3011A
Top View
PACKAGE MARK
20184002
Top View
20184003
ORDERING INFORMATION
Order Number
LP5527TL
LP5527TLX
20184004
Top View
XY — Date Code
TT — Die Traceability
5527 — Product Identification
Package Marking
5527
5527
Supplied As
TNR 250
TNR 3000
Spec/Flow
NoPB
NoPB
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