zxld1374 Diodes, Inc., zxld1374 Datasheet - Page 33

• Manufacturer Part Number: zxld1374
• Description: 60v High Accuracy 1.5a Buck/boost/buck-boost Led Driver Converter
• Manufacturer: Diodes, Inc.

Applications Examples
350mA Buck-boost LED driver
In
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
applications.
Bill of Material
Typical Performance
ZXLD1374
Document number: DS35032 Rev. 1 - 2
ideal
this
C3 C4 C5
Ref No.
C2 C6
R1 R2
100%
U1
Q1
D1
D2
C1
R3
R4
R5
R6
Z1
L1
90%
80%
70%
60%
50%
40%
30%
20%
10%
for
0%
application
7
automotive
8
Efficiency vs Input Voltage
Figure 59. Efficiency
9
10
47V 410mW Zener
100V 3A Schottky
100V 1A Schottky
11
example,
60V LED driver
4.7uF 50V X7R
60V MOSFET
1uF 50V X7R
lighting
100pF 50V
300mΩ 1%
12
47uH 2.6A
120kΩ 1%
36kΩ 1%
Input Voltage
Value
2.7kΩ
1kΩ
13
14
15
16
4 LED VF=12.5V
5 LED VF=15.6V
17
Figure 58. Application circuit of 350mA Buck-boost LED driver
18
SMD 0805/0603
SMD 0805/0603
SMD 0805/0603
SMD 0805/0603
PDS3100-13
19
744771147
ZXLD1374
BZT52C47
SMD 1206
www.diodes.com
SMD1210
SMD1206
SMD1206
2N7002A
Part No.
B1100
20
Page 33 of 35
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Wurth Electronik
Manufacturer
7
Diodes Inc
Diodes Inc
Diodes Inc
Diodes Inc
Diodes Inc
Generic
Generic
Generic
Generic
Generic
Generic
Generic
Generic
8
Figure 60. Line regulation
LED Current vs Input Voltage
Diodes Incorporated
A Product Line of
9
10
11
12
Input Voltage
13
14
15
16
4 LED VF=12.5V
5 LED VF=15.6V
© Diodes Incorporated
ZXLD1374
17
October 2010
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