Diodes ZXLD1370 - Manual (Page 35)

ZXLD1370
Document number: DS32165 Rev. 5 - 2
35 of 39
www.diodes.com
September 2012
© Diodes Incorporated
ZXLD1370
A Product Line of
Diodes Incorporated
Application Information
(cont.)
Typical Performance
Efficiency vs Input Voltage
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
10 12 14 16 18 20 22 24
Input Voltage (V)
E
ff
ic
ie
n
cy
(
%
)
1 LED
2 LED
Figure 41 Efficiency
LED Current vs Input Voltage
0
500
1000
1500
2000
2500
3000
10 12 14 16 18 20 22 24
Input Voltage (V)
LE
D Cur
rent
(
m
A)
Figure 42 Line Regulation
Example 2: 400mA Boost LED Driver
In this application example, the ZXLD1370 is connected as a boost LED driver. The schematic and parts list are shown below. The LED driver
is able to deliver 400mA of LED current into 12 high-brightness LEDs with an input voltage range of 16V to 32V.
The overall high efficiency of 92%+ makes it ideal for applications such as solar LED street lighting and general LED illuminations.
Figure 43 Application Circuit - 400mA Boost LED Driver
Table4. Bill of Material
Ref No. Value Part No. Manufacturer
U1 60V LED driver ZXLD1370 Diodes Inc
Q1 60V MOSFET ZXMN6A25G Diodes Inc
Q2 60V MOSFET 2N7002A Diodes Inc
D1 100V 3A Schottky PDS3100-13 Diodes Inc
Z1 47V 410mW Zener BZT52C47 Diodes Inc
L1 68µH 2.1A 744771168 Wurth Electronik
C1 100pF 50V SMD 0805/0603 Generic
C3 C9 4.7µF 50V X7R SMD1210 Generic
C2 1µF 50V X7R SMD1206 Generic
R1 R2 560mΩ 1% SMD1206 Generic
R9 R10 33kΩ 1% SMD 0805/0603 Generic
R12 0Ω SMD 0805/0603 Generic
R15 2.7kΩ SMD 0805/0603 Generic