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A Product Line of
Diodes Incorporated
ZXLD1374
Typical Characteristics – Boost Mode – R S = 150m ? , L = 33μH, I LED = 325mA, GI RATIO = 0.21
0.358
T A = 25 ° C
L = 33μH
0.347
0.336
0.325
0.314
R S = 150m Ω
R GI1 = 33k Ω
R GI2 = 120k Ω
0.303
6 LEDs
8 LEDs
10 LEDs
12 LEDs
14 LEDs
16 LEDs
0.292
12
17
22
27 32
INPUT VOLTAGE (V)
37
42
47
Figure 17 I LED vs. Input and Number of LED
700
650
600
T A = 25 ° C
L = 33μH
R S = 150m Ω
R GI1 = 33k Ω
R GI2 = 120k Ω
550
500
450
400
350
300
250
6 LEDs
8 LEDs
10 LEDs
12 LEDs
14 LEDs
16 LEDs
200
12
17
22
27 32 37
INPUT VOLTAGE (V)
42
47
Figure 18 Frequency vs. Input Voltage and Number LED
100%
6 LEDs
8 LEDs
10 LEDs
12 LEDs
14 LEDs
16 LEDs
95%
90%
85%
80%
T A = 25 ° C
L = 33μH
R S = 150m Ω
R GI1 = 33k Ω
R GI2 = 120k Ω
75%
12
17
22
27 32 37
INPUT VOLTAGE (V)
42
47
Figure 19 Efficiency vs. Input Voltage and Number of LED
ZXLD1374
Document number: DS35032 Rev. 3 - 2
12 of 39
www.diodes.com
September 2012
? Diodes Incorporated
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