Diodes ZXLD1374 - Manual (Page 12)

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