Diodes ZXLD1374 - Manual (Page 13)

ZXLD1374
Document number: DS35032 Rev. 3 - 2
13 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
= 350mA, GI
RATIO
= 0.23 with Bootstrap
0.315
0.333
0.350
0.368
0.385
6.5 8 9.5 11 12.5 14 15.5 17
INPUT VOLTAGE (V)
Figure 20 Load Current vs. Input Voltage and Number of LED
L
E
D
C
U
R
R
E
N
T
(A
)
T = 25 C
L = 33µH
R = 150m
R
= 36
R = 120
A
S
GI1
GI2
°
Ω
m
m
Ω
Ω
5 LEDs
7 LEDs
9 LEDs
11 LEDs
13 LEDs 15 LEDs
100
200
300
400
500
600
700
6.5 8 9.5 11 12.5 14 15.5 17
INPUT VOLTAGE (V)
Figure 21 Frequency vs. Input Voltage and Number of LED
0
S
W
IT
CHING
F
R
E
Q
UE
NCY
(
kH
z)
T = 25 C
L = 33µH
R = 150m
R
= 36
R = 120
A
S
GI1
GI2
°
Ω
m
m
Ω
Ω
7 LEDs
5 LEDs
9 LEDs
11 LEDs
13 LEDs
15 LEDs
70%
75%
80%
85%
90%
95%
100%
6.5 8 9.5 11 12.5 14 15.5 17
INPUT VOLTAGE (V)
Figure 22 Efficiency vs. Input Voltage and Number of LED
T = 25 C
L = 33µH
R = 150m
A
S
°
Ω
E
F
F
ICIE
NCY
5 LEDs
7 LEDs
9 LEDs 11 LEDs
13 LEDs
15 LEDs