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A Product Line of
Diodes Incorporated
ZXLD1374
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.
U1
Q1
D1
Z1
L1
C1
C3 C4
C2
R1 R2
R3
R4
R5
Value
60V LED driver
60V MOSFET
100V 3A Schottky
51V 410mW Zener
47μH 2.6A
100pF 50V
4.7μF 100V X7R
1μF 50V X7R
300m ? 1%
120k ? 1%
36k ? 1%
2.7k ?
Part No.
ZXLD1374
2N7002A
PDS3100-13
BZT52C51
744771147
SMD 0805/0603
SMD1210
SMD1206
SMD1206
SMD 0805/0603
SMD 0805/0603
SMD 0805/0603
Manufacturer
Diodes Inc
Diodes Inc
Diodes Inc
Diodes Inc
Wurth Electronik
Generic
Generic
Generic
Generic
Generic
Generic
Typical Performance
100%
90%
80%
70%
60%
50%
40%
Efficiency vs Input Voltage
400
350
300
250
200
150
LED Current vs Input Voltage
30%
20%
10%
0%
12 LED VF=37V
15 LED VF=47V
100
50
0
12 LED VF=37V
15 LED VF=47V
16
18
20
22
24
26
28
30
16
18
20
22
24
26
28
30
Input Voltage
Figure 50 Efficiency
Input Voltage
Figure 51 Line Regulation
ZXLD1374
Document number: DS35032 Rev. 3 - 2
36 of 39
www.diodes.com
September 2012
? Diodes Incorporated
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