ZXLD1370_11 DIODES [Diodes Incorporated], ZXLD1370_11 Datasheet - Page 17

• 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
In the case of the Buck-boost topology, the following graphs guide the designer to select the inductor for a target frequency
of 400kHz (figure 23) or higher than 500kHz (figure 24).
Figure 23. 350mA Buck-Boost mode inductor selection for target frequency 400kHz
15
13
11
Figure 22. 750mA Buck mode inductor selection for target frequency > 500kHz
9
7
5
3
1
15
13
11
0
9
7
5
3
1
0
L=22uH
10
(Continued)
10
ZXLD1370 Buck-Boost Mode 350mA Minimum Recommended Inductor
L=33uH
ZXLD1370 Buck Mode 750mA Minimum Recommended Inductor
L=33uH
20
20
Target Switching frequency > 500kHz
Target Switching frequency - 400kHz
L=47uH
Supply Voltage (V)
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Supply Voltage (V)
L=47uH
17 of 35
30
30
L=68uH
40
40
Diodes Incorporated
A Product Line of
50
50
L=100uH
60
60
© Diodes Incorporated
ZXLD1370
February 2011