ZXLD1366_10 DIODES [Diodes Incorporated], ZXLD1366_10 Datasheet - Page 26

• Manufacturer Part Number: ZXLD1366_10
• Description: HIGH ACCURACY 1A, 60V LED DRIVER WITH INTERNAL SWITCH
• Manufacturer: DIODES [Diodes Incorporated]

A Product Line of
Diodes Incorporated
ZXLD1366
In order to maximize the thermal capabilities of the DFN3030-6 and the SO-8-EP packages thermal vias should be
incorporated into the PCB. See figures 7 and 8 for examples used in the ZXLD1366 evaluation boards.
Figure 7 Suggested layout for DFN3030-6 package
Figure 8 Suggested layout for SO-8-EP package
Vias ensure an effective path to the ground plane for the heat flow therefore reducing the thermal impedance between
junction and ambient temperature. Diodes came to the conclusion that the compromise is reached by using more than 10
vias with 1mm of diameter and 0.5 hole size.
Finally the same scheme in figure 7 (without the exposed paddle) can be usde for the TSOT23-5 package guaranteeing an
effective thermal path.
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ZXLD1366
June 2010
www.diodes.com
© Diodes Incorporated
Document number: DS31992 Rev. 5 - 2