Typical characteristics, Zxld1370, A product line of diodes incorporated – Diodes ZXLD1370 User Manual
Page 12
ZXLD1370
Document number: DS32165 Rev. 5 - 2
12 of 39
September 2012
© Diodes Incorporated
ZXLD1370
A Product Line of
Diodes Incorporated
Typical Characteristics
(cont.) Boost Mode – R
S
= 150mΩ, GI
RATIO
= 0.23, L = 33µH
0.000
0.050
0.100
0.150
0.200
0.250
0.300
0.350
0.400
6.5
10
13.5
17
20.5
24
27.5
31
34.5
38
41.5
45
48.5
INPUT VOLTAGE (V)
Figure 15 I
vs. Input Voltage & Number of LED
LED
3 LEDs
4 LEDs
6 LEDs
8 LEDs
10 LEDs
12 LEDs
14 LEDs
16 LEDs
LE
D
CURRENT
(
A
)
T = 25°C
V
= V
A
AUX
IN
50
100
150
200
250
300
350
400
450
500
6.5
10
13.5
17
20.5
24
27.5
31
34.5
38
41.5
45
48.5
INPUT VOLTAGE (V)
Figure 16 Frequency vs. Input Voltage & Number of LED
3 LEDs
4 LEDs
6 LEDs
8 LEDs
10 LEDs
12 LEDs
14 LEDs
16 LEDs
S
W
IT
CHING F
R
EQUENC
Y
(
kHz
)
T = 25°C
V
= V
A
AUX
IN
Boosted voltage across
LEDs approaching VIN
100
6.5
10
13.5
17
20.5
24
27.5
31
34.5
38
41.5
45
48.5
INPUT VOLTAGE (V)
Figure 17 Efficiency vs. Input Voltage & Number of LED
3 LEDs
4 LEDs
6 LEDs
8 LEDs
10 LEDs
12 LEDs
14 LEDs
16 LEDs
EF
F
ICI
ENCY (
%
)
T = 25°C
V
= V
A
AUX
IN
95
90
85
80
75
70
65
60