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ZXLD1374EST20TC Datasheet(PDF) 31 Page - Diodes Incorporated

Part # ZXLD1374EST20TC
Description  60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST LED DRIVER CONVERTER
PDF  35 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

ZXLD1374EST20TC Datasheet(HTML) 31 Page - Diodes Incorporated

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ZXLD1374
ZXLD1374
Document number: DS35032 Rev. 1 - 2
Page 31 of 35
www.diodes.com
October 2010
© Diodes Incorporated
A Product Line of
Diodes Incorporated
Applications Examples
1.5A Buck LED driver
In this application example, ZXLD1374 is
connected as a Buck LED driver with
schematic and parts list shown below.
The LED driver is able to deliver 1.5A of
LED current to single or multiple LEDs in
series with input voltage ranged from
10V to 50V. In order to achieve high
efficiency under high LED current, Super
Barrier Rectifier (SBR) with low forward
voltage is used as free wheeling rectifier.
With only a few extra components, the
ZXLD1374 LED driver is able to deliver
LED power of greater than 60W. This is
suitable for applications which require
high LED power likes high power down
lighting, wall washer, automotive LED
lighting etc.
Figure 52. Application circuit of 1.5A Buck LED driver
Bill of Material
Ref No.
Value
Part No.
Manufacturer
U1
60V 1.5A LED driver
ZXLD1374
Diodes Inc
D1
100V 3A SBR
SBR3U100
Diodes Inc
L1
33uH 4.2A
744770933
Wurth Electronik
C1
100pF 50V
SMD 0805/0603
Generic
C2
1uF 100V X7R
SMD1206
Generic
C3 C4 C5
2.2uF 100V X7R
SMD1210
Generic
R1 R2
300m
Ω 1%
SMD1206
Generic
R3
4.7
Ω
SMD1206
Generic
Typical Performance
Efficiency vs Input Voltage
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
10
15
20
25
30
35
40
45
50
Input Voltage (V)
1 LED VF=3.4V
3 LED VF=9.8V
5 LED VF=16V
Figure 53. Efficiency
LED Current vs Input Voltage
0
400
800
1200
1600
10
15
20
25
30
35
40
45
50
Input Voltage (V)
1 LED VF=3.4V
3 LED VF=9.8V
5 LED VF=16V
Figure 54. Line regulation



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