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LDS8680 Datasheet(PDF) 4 Page - IXYS Corporation

Part No. LDS8680
Description  800 mA White LED Driver for Photo Flash
Download  12 Pages
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Maker  IXYS [IXYS Corporation]
Homepage  http://www.ixys.com
Logo IXYS - IXYS Corporation

LDS8680 Datasheet(HTML) 4 Page - IXYS Corporation

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LDS8680
© 2009 IXYS Corp.
4
Doc. No. 8680_DS, Rev. N1.0
Characteristics subject to change without notice
LED CURRENT SETTING COMMANDS
Command Value
Binary
Hex
Command Description
0000 0000 0000 0001
00 01
Turn LEDA “ON” with LED current at factory preset maximum value, Safety
Timer is “ON”
0000 0000 0000 0010
00 02
Turn LEDB “ON” with LED current at factory preset maximum value, Safety
Timer is “ON”
0000 0000 0000 0011
00 03
Turn LEDA and LEDB “ON” with LED current at factory preset maximum
value, Safety Timer is “ON”
0000 0100 000Y YYYY
04 ZZ
Turn LEDA “ON” with LED current other than factiry programmed value. Binary
code Y YYYY is determined as desired LED current value in mA divided by
25.6 mA minus 1. Safety Timer is “ON”
Example:
Binary Code to set 540 mA current is equal (540/25.6 – 1) = 20 (dec) = 1 0100
(bin) = 14 (hex)
Because LSB value is 25.6 mA, LED current can be set with this resolution
only.
0000 0110 000Y YYYY
0000 0010 0000 0001
06 ZZ
02 01
Set of two commands to program LEDA current as above, but Safety Timer is
“OFF”
0000 1000 0000 YYYY
08 0Z
Turn LEDB “ON” with LED current other than factiry programmed value. Binary
code YYYY is determined as desired LED current value in mA divided by
25.6 mA minus 1. Safety Timer is “ON”
Example:
Binary Code to set 307 mA current is equal (307/25.6 – 1) = 11 (dec) = 1011
(bin) = B (hex)
Because LSB value is 25.6 mA, LED current can be set with this resolution
only.
0000 1010 0000 YYYY
0000 0010 0000 0010
0A 0Z
02 02
Set of two commands to program LEDB current as above, but Safety Timer is
“OFF”


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