ZXLD1370

ZXLD1370

Document number: DS32165 Rev. 4 - 2

16 of 36

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March 2011

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ZXLD1370 Buck Mode 1.5A Minimum Recommended Inductor

Target Switching Frequency > 500kHz

0

10

20

304050

60

1

3

5

7

9

11

13

15

Supply Voltage (V)

L=10µH

L=22µH

L=33µH

L=47µH

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

10

2030

4050

60

1

3

5

7

9

11

13

15

Supply Voltage (V)

L=33µH

L=47µH

L=68µH

L=100µH

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