Application information, Zxld1374, A product line of diodes incorporated – Diodes ZXLD1374 User Manual
Page 36

ZXLD1374
Document number: DS35032 Rev. 3 - 2
36 of 39
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