LP8501TME/NOPB National Semiconductor, LP8501TME/NOPB Datasheet

LP8501TME/NOPB

Manufacturer Part Number

LP8501TME/NOPB

Description

IC LED DRIVER LINEAR 25-USMD

Manufacturer

National Semiconductor

Series

PowerWise®r

Type

Linear (I²C Interface)r

Datasheet

1.LP8501TMENOPB.pdf (2 pages)

Specifications of LP8501TME/NOPB

Topology

PWM, Switched Capacitor (Charge Pump)

Number Of Outputs

Internal Driver

Yes

Type - Primary

Backlight, Light Management Unit (LMU)

Frequency

1.25MHz

Voltage - Supply

2.7 V ~ 5.5 V

Voltage - Output

4.5V

Mounting Type

Surface Mount

Package / Case

25-MicroSMD

Operating Temperature

-30°C ~ 85°C

Current - Output / Channel

25.5mA

Internal Switch(s)

Yes

Efficiency

95%

Led Driver Application

LED Backlighting, Portable Electronics

No. Of Outputs

Output Current

225mA

Input Voltage

2.7V To 5.5V

Dimming Control Type

PWM

Driver Case Style

Micro SMD

Rohs Compliant

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

LP8501TMETR

Current page: 1 of 2
Download datasheet (117Kb)

LP8501 PRODUCT BRIEF

Multi-Purpose 9-Output LED Driver

General Description

The LP8501 is a LED driver with 9 outputs, designed to pro-

duce versatile lighting effects for mobile devices. The device

is equipped with an internal program memory, which allows

operation without processor control. Internal program mem-

ory 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 pro-

gram execution start without I

The device requires only four small and low-cost ceramic ca-

pacitors. 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

Typical Application

C write.

300419

Features

■

Applications

■

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

Two wire, I

Small application circuit

Pin-configured LED powering for LEDs 1 to 6 and for LEDs

7 to 9

Solution area <18 mm

Fun lights and indicator lights

LED backlighting and color keypad lighting

Programmable current source

Haptic feedback driver and GPIO expander

C-compatible, control interface

30041901

VDD

= 10 µA (typ.)

November 20, 2008

www.national.com

Related parts for LP8501TME/NOPB

LP8501TME/NOPB Summary of contents

Page 1

... The LP8501 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 © 2008 National Semiconductor Corporation Features ■ ...

Page 2

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: 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 ...

Related keywords

lp8501
lp850
lp8501tmx
lp8501tme
LP8501TME/NOPB datasheet
LP8501TME/NOPB data sheet
LP8501TME/NOPB pdf datasheet
LP8501TME/NOPB component
LP8501TME/NOPB part
LP8501TME/NOPB distributor
LP8501TME/NOPB RoHS
LP8501TME/NOPB datasheet download