ZXLD1374(2010) 查看數據表（PDF） - Diodes Incorporated.
零件编号
产品描述 (功能)
生产厂家
ZXLD1374
(Rev.:2010)
(Rev.:2010)
Diodes Incorporated.
ZXLD1374 Datasheet PDF : 35 Pages
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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.
ZXLD1374
Figure 58. Application circuit of 350mA Buck-boost LED driver
Bill of Material
Ref No.
Value
U1
60V LED driver
Q1
60V MOSFET
D1
100V 3A Schottky
D2
100V 1A Schottky
Z1
47V 410mW Zener
L1
47uH 2.6A
C1
100pF 50V
C3 C4 C5
4.7uF 50V X7R
C2 C6
1uF 50V X7R
R1 R2
300mΩ 1%
R3
120kΩ 1%
R4
36kΩ 1%
R5
2.7kΩ
R6
1kΩ
Typical Performance
Part No.
ZXLD1374
2N7002A
PDS3100-13
B1100
BZT52C47
744771147
SMD 0805/0603
SMD1210
SMD1206
SMD1206
SMD 0805/0603
SMD 0805/0603
SMD 0805/0603
SMD 1206
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
7
Efficiency vs Input Voltage
4 LED VF=12.5V
5 LED VF=15.6V
8 9 10 11 12 13 14 15 16 17 18 19 20
Input Voltage
Manufacturer
Diodes Inc
Diodes Inc
Diodes Inc
Diodes Inc
Diodes Inc
Wurth Electronik
Generic
Generic
Generic
Generic
Generic
Generic
Generic
Generic
LED Current vs Input Voltage
400
350
300
250
200
150
100
4 LED VF=12.5V
50
5 LED VF=15.6V
0
7 8 9 10 11 12 13 14 15 16 17 18 19 20
Input Voltage
Figure 59. Efficiency
ZXLD1374
Document number: DS35032 Rev. 1 - 2
Page 33 of 35
www.diodes.com
Figure 60. Line regulation
October 2010
© Diodes Incorporated
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