Typical Characteristics (Cont.)
100
95
90
85
80
75
5
350
300
250
200
150
100
50
0
5
Efficiency vs No. of LEDs
L=220uH, Rs=0.33 Ohms
10
15
20
25
VIN (V)
Operating Frequency vs Input Voltage
L=220uH, Rs=0.33 Ohms
10
15
20
25
VIN (V)
1 LED
2 LED
3 LED
4 LED
5 LED
6 LED
7 LED
8 LED
30
1
0.8
0.6
0.4
0.2
0
5
2
1
0
1 LED
5
2 LED
3 LED
-1
4 LED
5 LED
-2
6 LED
7 LED
-3
8 LED
-4
-5
30
-6
A Product Line of
Diodes Incorporated
ZXLD1352
Duty Cycle vs Input Voltage
L=220uH, Rs=0.33 Ohms
10
15
20
25
VIN (V)
Output Current Variation vs Input Voltage
L=220uH, Rs=0.33 Ohms
1 LED
2 LED
3 LED
4 LED
5 LED
6 LED
7 LED
8 LED
30
10
15
20
25
30 1 LED
2 LED
3 LED
4 LED
5 LED
6 LED
7 LED
8 LED
VIN (V)
ZXLD1352
Document number: DS33469 Rev. 3 - 2
9 of 21
www.diodes.com
December 2010
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