744770933 データシートの表示（PDF） - Diodes Incorporated.
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744770933 Datasheet PDF : 33 Pages
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Diodes Incorporated
ZXLD1370 Buck Mode 1.5A Minimum Recommended Inductor
Target Switching frequency > 500kHz
ZXLD1370
15
13
11
9
7
L=47uH
5
L=33uH
3
L=22uH
L=10uH
1
0
10
20
30
40
50
60
Supply Voltage (V)
Figure 20: 1.5A Buck mode inductor selection for target frequency > 500kHz
For example, in a buck configuration (VIN =24V and 6 LEDs), with a load current of 1.5A; if the target frequency is around
400 kHz, the Ideal inductor size is L= 33µH.
The same kind of graphs can be used to select the right inductor for a buck configuration and a LED current of 750mA, as
shown in figures 21 and 22.
ZXLD1370 Buck Mode 750mA Minimum Recommended Inductor
Target Switching frequency 400kHz
15
13
11
9
7
L=100uH
5
L=68uH
3
L=47uH
L=33uH
1
0
10
20
30
40
50
60
Supply Voltage (V)
Figure 21: 750mA Buck mode inductor selection for target frequency 400kHz
ZXLD1370
Document number: DS32165 Rev. 2 - 2
15 of 33
www.diodes.com
May 2010
© Diodes Incorporated
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