ZXLD1370_11 DIODES [Diodes Incorporated], ZXLD1370_11 Datasheet - Page 16

• Manufacturer Part Number: ZXLD1370_11
• Description: 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER CONTROLLER
• Manufacturer: DIODES [Diodes Incorporated]

ZXLD1370
Document number: DS32165 Rev. 3 - 2
Applications Information
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
Figure 21. 750mA Buck mode inductor selection for target frequency 400kHz
Figure 20. 1.5A Buck mode inductor selection for target frequency > 500kHz
0
10
L=10uH
L=33uH
10
(Continued)
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
16 of 35
30
L=33uH
L=68uH
40
40
Diodes Incorporated
A Product Line of
L=100uH
L=47uH
50
50
60
60
© Diodes Incorporated
ZXLD1370
February 2011