LM3630A LED Driver Datasheet

LM3630A Datasheet, PDF, Equivalent


Part Number

LM3630A

Description

High-Efficiency Dual-String White LED Driver

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download LM3630A Datasheet


LM3630A
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
Reference
Design
LM3630A
SNVS974B – APRIL 2013 – REVISED OCTOBER 2015
LM3630A High-Efficiency Dual-String White LED Driver
1 Features
1 Drives up to 2 Strings of 10 Series LEDs
• Wide 2.3-V to 5.5-V Input Voltage Range
• Up to 87% Efficient
• 8-bit I2C-Compatible Programmable Exponential
or Linear Brightness Control
• PWM Brightness Control for CABC Operation
• Independent Current Control per String
• True Shutdown Isolation for LEDs
• Internal Soft-Start Limits Inrush Current
• Adaptive Headroom
• Programmable 16-V/24-V/32-V/40-V Overvoltage
Protection
• Selectable Boost Frequency of 500 kHz or 1 MHz
with Optionally Additional Offset
• Low Profile 12-Pin DSBGA Package
• Solution Size 32 mm²
2 Applications
• Smart-Phone LCD Backlighting
• LCD and Keypad Lighting
3 Description
The LM3630A is a current-mode boost converter
which supplies the power and controls the current in
up to two strings of 10 LEDs per string. Programming
is done over an I2C-compatible interface. The
maximum LED current is adjustable from 5 mA to
28.5 mA. At any given maximum LED current the
LED brightness is further adjusted with 256
exponential or linear dimming steps. Additionally,
pulsed width modulation (PWM) brightness control
can be enabled allowing for LED current adjustment
by a logic level PWM signal.
The boost switching frequency is programmable at
500 kHz for low switching loss performance or 1 MHz
to allow the use of tiny low-profile inductors. A setting
for a 10% offset of these frequencies is available.
Overvoltage protection is programmable at 16 V,
24 V, 32 V, or 40 V to accommodate a wide variety of
LED configurations and Schottky diode/output
capacitor combinations.
The device operates over a 2.3-V to 5.5-V operating
voltage range and –40°C to +85°C ambient
temperature range. The LM3630A is available in an
ultra-small 12-bump DSBGA package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (MAX)
LM3630A
DSBGA (12)
1.94 mm × 1.42 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
VIN
CIN
L D1
VOUT up to 40V
COUT
IN SW
OVP
SDA
SCL
AP
INTN
LM3630A LED1
HWEN
PWM
LED2
SEL
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

LM3630A
LM3630A
SNVS974B – APRIL 2013 – REVISED OCTOBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 I2C-Compatible Timing Requirements (SCL, SDA) . 6
6.7 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 19
7.1 Overview ................................................................. 19
7.2 Functional Block Diagram ....................................... 19
7.3 Feature Description................................................. 19
7.4 Device Functional Modes........................................ 26
7.5 Programming........................................................... 30
7.6 Register Maps ......................................................... 31
8 Application and Implementation ........................ 37
8.1 Application Information............................................ 37
8.2 Typical Application ................................................. 37
8.3 Initialization Setup ................................................... 40
9 Power Supply Recommendations...................... 40
10 Layout................................................................... 41
10.1 Layout Guidelines ................................................. 41
10.2 Layout Example .................................................... 44
11 Device and Documentation Support ................. 45
11.1 Device Support .................................................... 45
11.2 Documentation Support ....................................... 45
11.3 Community Resources.......................................... 45
11.4 Trademarks ........................................................... 45
11.5 Electrostatic Discharge Caution ............................ 45
11.6 Glossary ................................................................ 45
12 Mechanical, Packaging, and Orderable
Information ........................................................... 45
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (January 2014) to Revision B
Page
• Added Device Information and Pin Configuration and Functions sections, ESD Rating table, Feature Description,
Device Functional Modes, Application and Implementation, Power Supply Recommendations, Layout, Device and
Documentation Support, and Mechanical, Packaging, and Orderable Information sections ................................................. 1
Changes from Original (April 2013) to Revision A
Page
• Changed equation in note 2 of Electrical Char table.............................................................................................................. 5
2 Submit Documentation Feedback
Product Folder Links: LM3630A
Copyright © 2013–2015, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design LM3630A SN VS974B – APRIL 2013 – REVISED OCTOB ER 2015 LM3630A High-Efficiency Dual-St ring White LED Driver 1 Features •1 Drives up to 2 Strings of 10 Series LED s • Wide 2.3-V to 5.5-V Input Voltage Range • Up to 87% Efficient • 8-bi t I2C-Compatible Programmable Exponenti al or Linear Brightness Control • PWM Brightness Control for CABC Operation • Independent Current Control per Str ing • True Shutdown Isolation for LED s • Internal Soft-Start Limits Inrush Current • Adaptive Headroom • Prog rammable 16-V/24-V/32-V/40-V Overvoltag e Protection • Selectable Boost Frequ ency of 500 kHz or 1 MHz with Optionall y Additional Offset • Low Profile 12- Pin DSBGA Package • Solution Size 32 mm² 2 Applications • Smart-Phone LCD Backlighting • LCD and Keypad Lighti ng 3 Description The LM3630A is a curr ent-mode boost converter which supplies the power and controls the current in up to two strings of.
Keywords LM3630A, datasheet, pdf, etcTI, High-Efficiency, Dual-String, White, LED, Driver, M3630A, 3630A, 630A, LM3630, LM363, LM36, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)