zxld1370 Diodes, Inc., zxld1370 Datasheet - Page 15

• Manufacturer Part Number: zxld1370
• Description: 60v High Accuracy Buck/boost/buck-boost Led Driver Controller
• Manufacturer: Diodes, Inc.

ZXLD1370
Document number: DS32165 Rev. 2 - 2
For example, in a buck configuration (V
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.
15
13
11
9
7
5
3
1
15
13
11
0
9
7
5
3
1
0
Figure 21: 750mA Buck mode inductor selection for target frequency 400kHz
Figure 20: 1.5A Buck mode inductor selection for target frequency > 500kHz
10
L=10uH
L=33uH
10
ZXLD1370 Buck Mode 750mA Minimum Recommended Inductor
ZXLD1370 Buck Mode 1.5A Minimum Recommended Inductor
IN
=24V and 6 LEDs), with a load current of 1.5A; if the target frequency is around
20
L=47uH
L=22uH
20
Target Switching frequency > 500kHz
Target Switching frequency 400kHz
Supply Voltage (V)
Supply Voltage (V)
www.diodes.com
30
15 of 33
30
L=33uH
L=68uH
40
40
Diodes Incorporated
A Product Line of
L=100uH
L=47uH
50
50
60
60
© Diodes Incorporated
ZXLD1370
May 2010