ZXLD1370

ZXLD1370

Document number: DS32165 Rev. 2 - 2

15 of 33

www.diodes.com

May 2010

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ZXLD1370 Buck Mode 1.5A Minimum Recommended Inductor

Target Switching frequency > 500kHz

0

102030

4050

60

1

3

5

7

9

11

13

15

Supply Voltage (V)

L=10uH

L=22uH

L=33uH

L=47uH

Figure 20: 1.5A Buck mode inductor selection for target frequency > 500kHz

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

0

102030405060

1

3

5

7

9

11

13

15

Supply Voltage (V)

L=33uH

L=47uH

L=68uH

L=100uH

Figure 21: 750mA Buck mode inductor selection for target frequency 400kHz