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LM3644 Arkusz danych(PDF) 2 Page - Texas Instruments

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Numer części LM3644
Szczegółowy opis  Dual 1.5A Current Source Camera Flash LED Driver
Download  41 Pages
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

LM3644 Arkusz danych(HTML) 2 Page - Texas Instruments

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LM3644, LM3644TT
SNVSA52D – AUGUST 2014 – REVISED SEPTEMBER 2015
www.ti.com
Table of Contents
8.3
Feature Description ................................................ 13
1
Features .................................................................. 1
8.4
Device Functioning Modes...................................... 15
2
Applications ........................................................... 1
8.5
Programming........................................................... 19
3
Description ............................................................. 1
8.6
Register Descriptions .............................................. 21
4
Revision History..................................................... 2
9
Applications and Implementation ...................... 25
5
Device Comparison Table..................................... 2
9.1
Application Information............................................ 25
6
Pin Configuration and Functions ......................... 3
9.2
Typical Application ................................................. 25
7
Specifications......................................................... 4
10
Power Supply Recommendations ..................... 31
7.1
Absolute Maximum Ratings ...................................... 4
11
Layout................................................................... 31
7.2
ESD Ratings ............................................................ 4
11.1
Layout Guidelines ................................................. 31
7.3
Recommended Operating Conditions ....................... 4
11.2
Layout Example ................................................... 32
7.4
Thermal Information .................................................. 4
12
Device and Documentation Support ................. 33
7.5
Electrical Characteristics........................................... 5
12.1
Device Support...................................................... 33
7.6
Timing Requirements ............................................... 6
12.2
Related Documentation......................................... 33
7.7
Switching Characteristics .......................................... 6
12.3
Trademarks ........................................................... 33
7.8
Typical Characteristics .............................................. 6
12.4
Electrostatic Discharge Caution ............................ 33
8
Detailed Description ............................................ 12
12.5
Glossary ................................................................ 33
8.1
Overview ................................................................. 12
13
Mechanical, Packaging, and Orderable
8.2
Functional Block Diagram ...................................... 13
Information ........................................................... 33
4 Revision History
Changes from Revision C (April 2015) to Revision D
Page
Changed 0x00 to 0x02 - typo ............................................................................................................................................... 21
Changed 0x40 to 0x04 - typo ............................................................................................................................................... 21
Changes from Revision B (November 2014) to Revision C
Page
Added information about LM3644TT option ........................................................................................................................... 1
Changed Handling Ratings to ESD Ratings; moved storage temp to Ab Max ..................................................................... 4
Added full Thermal Information information .......................................................................................................................... 4
Changes from Revision A (October 2013) to Revision B
Page
Changed '011' to '000' - typo ................................................................................................................................................ 24
Changes from Original (August 2014) to Revision A
Page
Changed title from "1.5A Synchronous Boost White LED Driver with High Side Current Sources " to "Dual 1.5-A
Current Source Camera Flash LED Driver" ........................................................................................................................... 1
Added Note to beginning of Applications and Implementations section .............................................................................. 25
5 Device Comparison Table
ORDERING PART NUMBER
MAXIMUM TORCH CURRENT
FLASH TIME-OUT RANGE
PER CHANNEL
LM3644YFFR
179 mA
10 ms to 400 ms
LM3644TTYFFR
360 mA
40 ms to 1600 ms
2
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Copyright © 2014–2015, Texas Instruments Incorporated
Product Folder Links: LM3644 LM3644TT


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