Diodes ZXLD1370 - Manual (Page 10)

ZXLD1370
Document number: DS32165 Rev. 5 - 2
10 of 39
www.diodes.com
September 2012
© Diodes Incorporated
ZXLD1370
A Product Line of
Diodes Incorporated
Typical Characteristics
(cont.) Buck Mode – R
S
= 150mΩ, L = 33µH
1.430
1.440
1.450
1.460
1.470
1.480
1.490
1.500
6.5 11 15.5 20 24.5 29 33.5 38 42.5 47 51.5 56 60.5
INPUT VOLTAGE (V)
Figure 9 Load Current vs. Input Voltage & Number of LED
1 LED 3 LEDs 5 LEDs 7 LEDs 9 LEDs 11 LEDs 13 LEDs 15 LEDs
T = 25 C
V
= V
A
AUX IN
°
LE
D
C
U
R
R
EN
T
(A
)
0
100
200
300
400
500
600
700
800
900
1000
6.5 11 15.5 20 24.5 29 33.5 38 42.5 47 51.5 56 60.5
INPUT VOLTAGE (V)
Figure 10 Frequency vs. Input Voltage & Number of LED
1 LED 3 LEDs 5 LEDs 7 LEDs 9 LEDs 11 LEDs 13 LEDs 15 LEDs
T = 25°C
V
= V
A
AUX
IN
SW
IT
C
H
IN
G
F
R
E
Q
U
EN
C
Y
(
kH
z)
100
6.5 11 15.5 20 24.5 29 33.5 38 42.5 47 51.5 56 60.5
INPUT VOLTAGE (V)
Figure 11 Efficiency vs. Input & Number of LED
T = 25°C
V
= V
A
AUX
IN
E
F
F
IC
IE
N
C
Y
(%
)
95
90
85
80
75
70
65
60