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30

RD-0608

Revision History

Rev/Date

Change Description

Rev 2.

Aug 1, 2008

Updated Figure 16 to provide exact schematic of the demo

board including sync modification.

Added Figure 4a to show LED current jumper settings.

Correction made to duty cycle calculation in section 8.

Added Figure 28a to show synchronization waveforms for

PWM dimming with preceding explanatory text.

New PCB layout added in section 12 to include sync

modification.

Rev 3.

Oct

27,2008

Modified table of contents.

Section (1) updated.

Section (2) updated.

Section (3) updated.

Section (4) updated.

Section (5) updated.

Section (6) updated.

Section (8) updated.

Section (9) updated.

Updated Fig 22. R7 added to improve PWM dimming signal

generator circuit to reduce noise sensitivity and increase

stability. R7 also added to signal generator BOM.

Section 8 "Dimming Mode" now recommends a PWM

frequency of 1kHz for dimming.

Added additional comments in "Layout Considerations"

item (5)

Rev 4.

April 15,

2009

Now updated for Rev D of the IRPLLED1 demo board.

Introduction – added safety warning.

Minor updates to sections (1) through (8)

Modified Fig 1 to remove old over voltage protection

circuit.

Replaced Fig 16 and Fig 29

Section 9 updated for new over voltage protection circuit.

Updated BOM

Updated PCB layout plots

Rev 5.

May 28,

2010

Added notes concerning the die revision parts IRS25401

and IRS25411. Enhancements are explained in section 8.

IR WORLD HEADQUARTERS: 101 N. Sepulveda Blvd., El Segundo, California 90245 Tel: (310) 252-7105

Data and specifications subject to change without notice.

05/28/2010