Diodes ZXLD1374 - Manual (Page 36)

ZXLD1374
Document number: DS35032 Rev. 3 - 2
36 of 39
www.diodes.com
September 2012
© Diodes Incorporated
ZXLD1374
A Product Line of
Diodes Incorporated
Application Information
(cont.)
350mA Boost LED Driver
In this application example, ZXLD1374 is
connected as a Boost LED driver with
schematic and parts list shown below. The
LED driver is able to deliver 350mA of LED
current into 12 high brightness LED with
input voltage ranged from 16V to 28V.
Overall high efficiency of 92%+ make it ideal
for applications likes solar LED street lighting
and general LED illuminations.
Figure 49 Application Circuit of 350mA Boost LED Driver
Bill of Material
Ref No. Value Part No. Manufacturer
U1 60V LED driver ZXLD1374 Diodes Inc
Q1 60V MOSFET 2N7002A Diodes Inc
D1 100V 3A Schottky PDS3100-13 Diodes Inc
Z1 51V 410mW Zener BZT52C51 Diodes Inc
L1 47µH 2.6A 744771147 Wurth Electronik
C1 100pF 50V SMD 0805/0603 Generic
C3 C4 4.7µF 100V X7R SMD1210 Generic
C2 1µF 50V X7R SMD1206 Generic
R1 R2 300mΩ 1% SMD1206 Generic
R3 120kΩ 1% SMD 0805/0603
R4 36kΩ 1% SMD 0805/0603 Generic
R5 2.7kΩ SMD 0805/0603 Generic
Typical Performance
Efficiency vs Input Voltage
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
16 18 20 22 24 26 28 30
Input Voltage
Ef
fi
ci
enc
y
12 LED VF=37V
15 LED VF=47V
Figure 50 Efficiency
LED Current vs Input Voltage
0
50
100
150
200
250
300
350
400
16 18 20 22 24 26 28 30
Input Voltage
LED
Cu
rr
en
t
12 LED VF=37V
15 LED VF=47V
Figure 51 Line Regulation