LP5524TM-5 NSC [National Semiconductor], LP5524TM-5 Datasheet

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LP5524TM-5

Manufacturer Part Number
LP5524TM-5
Description
Parallel LED Driver with PWM Brightness Control in Micro SMD Package
Manufacturer
NSC [National Semiconductor]
Datasheet
© 2007 National Semiconductor Corporation
LP5524
Parallel LED Driver with PWM Brightness Control in Micro
SMD Package
General Description
The LP5524 is a highly integrated dual-zone LED driver that
can drive up to four LEDs in parallel with a total output current
of 100mA. Regulated high side internal current sources de-
liver excellent current and brightness matching in all LEDs.
LED driver current sources are split into two independently
controlled banks for driving secondary displays, keypad and
indicator LEDs. Brightness control is achieved by applying
PWM signals to each enable pin. Default LED current is fac-
tory-programmable and an optional external resistor can be
used to set LED current to user programmable values.
LP5524 is available in National’s tiny 9-bump thin micro SMD
package.
Typical Application
300076
Features
Applications
High side LED driver
Drives 4 LEDs with Up to 25mA per LED
Ultra-Small Solution Size:
— No External Components
— Micro SMD-9 Package with 0.4 mm pitch:
0.4% Typical Current Matching
PWM Brightness Control
Over-Current Protection
Wide Input Voltage Range: 2.7V to 5.5V
Sub display Backlight
Keypad LED Backlight
Indicator LED
1.215mm x 1.215mm x 0.6mm (LxWxH)
30007601
www.national.com
July 2007

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LP5524TM-5 Summary of contents

Page 1

LP5524 Parallel LED Driver with PWM Brightness Control in Micro SMD Package General Description The LP5524 is a highly integrated dual-zone LED driver that can drive up to four LEDs in parallel with a total output current of 100mA. Regulated ...

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... Micro SMD-9 package, 1.215 x 1.215 x 0.60 mm body size, 0.4 mm pitch NS Package Number TMD09AAA Top View PACKAGE MARK ORDERING INFORMATION Order Number Default LED Current (Note 1) LP5524TM LP5524TMX Note 1: Other current options are available upon request, please contact the National Semiconductor Sales Office. PIN DESCRIPTIONS Pin ...

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Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. V (VIN, DX, ISET) Voltage on logic pins (ENA, ENB) Continuous Power Dissipation (Note 4) Junction Temperature (T ) ...

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Note 8: .Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power dissipation exists, special care must be paid to thermal dissipation issues in board design. Note 9: Min and Max limits are guaranteed by ...

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LED Driver Typical Performance Characteristics T = 25°C. Unless otherwise noted, typical performance characteristics apply to the LP5524 Block Diagram with 32.4 kΩ 100 nF. ISET IN Output Current vs R (Expanded Range) ISET ...

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Application Information ENABLE MODE The LP5524 has four constant current LED outputs which are split into two independently controlled banks. Each bank has its own enable input. ENA is used to control bank A and ENB is used to control ...

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Recommended External Components INPUT CAPACITOR Although not required for normal operation, a capacitor can be added reduce line noise. A surface-mount multi- IN layer ceramic capacitor (MLCC) is recommended. MLCCs with a X7R or X5R ...

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Physical Dimensions The dimension for X1, X2 and X3 are as given: — 1.215 mm ±0.03 mm — 1.215 mm ±0.03 mm — 0.60 mm ±0.075 mm See National Semiconductor Application Note 1112 Micro ...

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Notes 9 www.national.com ...

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THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. NATIONAL MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OF THE CONTENTS OF THIS PUBLICATION AND RESERVES THE RIGHT TO MAKE ...

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