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ZXLD1374 Datasheet(PDF) 34 Page - Diodes Incorporated

Part # ZXLD1374
Description  60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST
PDF  37 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

ZXLD1374 Datasheet(HTML) 34 Page - Diodes Incorporated

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ZXLD1374
60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST
LED DRIVER CONVERTER WITH AEC-Q100
ZXLD1374
Document number: DS35032 Rev. 2 - 2
34 of 37
www.diodes.com
March 2011
© Diodes Incorporated
A Product Line of
Diodes Incorporated
Applications Examples
350mA Buck-boost LED driver
In
this
application
example,
ZXLD1374 is connected as a Buck-
boost LED driver with schematic
and parts list shown below. The
LED driver is able to deliver 350mA
of
LED
current
into
4/5
high
brightness LED with input voltage
ranged from 7V to 20V. In order to
increase the driving voltage level
for the internal MOSFET during low
voltage
input,
bootstrap
circuit
formed by R6 D2 and C6 are used
to supply higher voltage to the
VAUX pin.
Since the Buck-boost LED driver
can handle an input voltage range
below and above the LED voltage,
this versatile input voltage range
makes
it
ideal
for
automotive
lighting applications.
Figure 58. Application circuit of 350mA Buck-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
D2
100V 1A Schottky
B1100
Diodes Inc
Z1
47V 410mW Zener
BZT52C47
Diodes Inc
L1
47µH 2.6A
744771147
Wurth Electronik
C1
100pF 50V
SMD 0805/0603
Generic
C3 C4 C5
4.7µF 50V X7R
SMD1210
Generic
C2 C6
1µF 50V X7R
SMD1206
Generic
R1 R2
300m
Ω 1%
SMD1206
Generic
R3
120k
Ω 1%
SMD 0805/0603
Generic
R4
36k
Ω 1%
SMD 0805/0603
Generic
R5
2.7k
Ω
SMD 0805/0603
Generic
R6
1k
Ω
SMD 1206
Generic
Typical Performance
Efficiency vs Input Voltage
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
7
8
9
1011
1213
1415
1617
181920
Input Voltage
4 LED VF=12.5V
5 LED VF=15.6V
Figure 59. Efficiency
LED Current vs Input Voltage
0
50
100
150
200
250
300
350
400
7
8
9
1011
1213
14
15
16
1718
1920
Input Voltage
4 LED VF=12.5V
5 LED VF=15.6V
Figure 60. Line Regulation



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