下载
Application Report
SNVA319B–February 2008–Revised April 2013
AN-1780 LM3553 1.2A Dual Flash LED Driver System with
I2C Compatible Interface
.....................................................................................................................................................
ABSTRACT
This application note describes how to operate the LM3553 Evaluation Module.
Contents
1 Typical Application Drawing ............................................................................................... 2
2 Bill of Materials .............................................................................................................. 2
3 Schematic .................................................................................................................... 3
4 LM3553 Evaluation Board Layout ........................................................................................ 3
5 Board Operation ............................................................................................................. 4
5.1 Basic Connections ................................................................................................. 4
5.2 External Control Interface Connection .......................................................................... 5
5.3 Operation Description ............................................................................................. 5
6 Software Interface Information ........................................................................................... 11
List of Figures
1 Top Layer .................................................................................................................... 3
2 Mid-Layer 1 .................................................................................................................. 4
3 Mid-Layer 2 .................................................................................................................. 4
4 Bottom Layer (unmirrored)................................................................................................. 4
5 Data Validity Diagram ...................................................................................................... 5
6 Start and Stop Conditions.................................................................................................. 6
7 Write Cycle w = write (SDA = "0") ack = acknowledge (SDA pulled down by the slave) id = chip address,
53h for LM3553 ............................................................................................................. 6
8 FEN Terminated Pulse.................................................................................................... 10
9 Safety Timer Terminated Pulse.......................................................................................... 10
10 TX Terminated Pulse ..................................................................................................... 11
11 GUI Start-Up ............................................................................................................... 12
12 Generic Read/Write Field................................................................................................. 12
13 Drop Down Menu.......................................................................................................... 12
List of Tables
1 M/F Functionality Configuration Table ................................................................................... 8
2 R
SET
Selection Table ........................................................................................................ 9
3 LM3553 Functionality Truth Table....................................................................................... 10
All trademarks are the property of their respective owners.
1
SNVA319B–February 2008–Revised April 2013 AN-1780 LM3553 1.2A Dual Flash LED Driver System with I2C Compatible
Interface
Submit Documentation Feedback
Copyright © 2008–2013, Texas Instruments Incorporated
