LP5523TMX/NOPB National Semiconductor, LP5523TMX/NOPB Datasheet

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LP5523TMX/NOPB

Manufacturer Part Number
LP5523TMX/NOPB
Description
IC LED DRIVER PROGRAM 25MICROSMD
Manufacturer
National Semiconductor
Type
Backlight, White LED, RGB (I²C Interface)r
Datasheet

Specifications of LP5523TMX/NOPB

Topology
PWM, Switched Capacitor (Charge Pump)
Number Of Outputs
9
Internal Driver
Yes
Type - Primary
Backlight
Type - Secondary
White LED
Mounting Type
Surface Mount
Package / Case
25-MicroSMD
Current - Output / Channel
25.5mA
Internal Switch(s)
Yes
Efficiency
93%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Supply
-
Voltage - Output
-
Frequency
-
Operating Temperature
-
Other names
LP5523TMX

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© 2009 National Semiconductor Corporation
Programmable 9-Output LED Driver
General Description
The LP5523 is a 9-channel LED driver designed to produce
lighting effects for mobile devices. A high-efficiency charge
pump enables LED driving over full Li-Ion battery voltage
range. The device is equipped with an internal program mem-
ory, which allows operation without processor control.
The LP5523 maintains excellent efficiency over a wide oper-
ating range by autonomously selecting the best charge pump
gain based on LED forward voltage requirements. LP5523 is
able to automatically enter power-save mode when LED out-
puts are not active, thus lowering idle current consumption
down to 10 µA (typ).
The LP5523 has an I
pin selectable addresses. The device has a flexible General
Purpose Output (GPO), which can be used as a digital control
pin for other devices. INT pin can be used to notify processor
when a lighting sequence has ended (interrupt -function). Al-
so, the device has a trigger input interface, which allows
synchronization, for example, between multiple LP5523 de-
vices.
The device requires only four small and low-cost ceramic ca-
pacitors. The LP5523 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.
Typical Application
2
C-compatible control interface with four
LP5523 PRODUCT BRIEF
300436
Features
Applications
Three independent program execution engines; 9
programmable outputs with 25.5 mA full-scale current, 8-
bit current setting resolution and 12-bit PWM control
resolution
Adaptive high efficiency 1x/1.5x fractional charge pump -
efficiency up to 94%
LED drive efficiency up to 93%
Charge pump with soft start and overcurrent/short circuit
protection
Built-in LED test
200 nA typical standby current
Automatic power save mode; I
Two wire, I
Flexible instruction set
Large SRAM program memory
Small application circuit
Source (high side) drivers
Architecture supports color control.
Fun lights and indicator lights
LED backlighting
Haptic feedback
Programmable current source
2
C-compatible, control interface
VDD
= 10 µA (typ.)
December 16, 2009
www.national.com
30043601

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LP5523TMX/NOPB Summary of contents

Page 1

... The LP5523 is available in a tiny 25–bump 2. 2. 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. Typical Application © 2009 National Semiconductor Corporation ...

Page 2

Connection Diagrams and Package Mark Information Connection Diagrams Thin micro SMD 25–bump package, 2.27 x 2.27 x 0.60 mm body size, 0.4 mm pitch NS Package Number TMD25LLA Top View Package Mark Top View: XY — Date Code TT — ...

Page 3

... The dimension for X1, X2 and X3 are as given: — 2.27 mm ±0.03 mm — 2.27 mm ±0.03 mm — 0.60 mm ±0.075 mm See National Semiconductor Application Note 1112 Micro SMD Wafer Level Chip Scale Package for PCB design and assembly instructions. NS Package Number TMD25LLA 25–bump micro SMD 3 www.national.com ...

Page 4

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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