zxld1370 Diodes, Inc., zxld1370 Datasheet - Page 28

• Manufacturer Part Number: zxld1370
• Description: 60v High Accuracy Buck/boost/buck-boost Led Driver Controller
• Manufacturer: Diodes, Inc.

Table 3: Bill of Material
ZXLD1370
Document number: DS32165 Rev. 2 - 2
APPLICATION EXAMPLES
Example 1:
2.8A Buck LED driver
In this application example, the ZXLD1370 is connected as a buck LED driver. The schematic and parts list are shown
below. The LED driver is able to deliver 2.8A of LED current with an input voltage range of 8V to 24V. In order to achieve
high efficiency at high LED current, a Super Barrier Rectifier (SBR) with a low forward voltage is used as the free wheeling
rectifier.
This LED driver is suitable for applications which require high LED current such as LED projector, automatic LED lighting
etc.
U1
Q1
D1
L1
C1
C2
C3 C4 C5
R1 R2 R3
R4
R5
Ref No.
than 5mm from the SHP pin.
2.2uF, X7R, 100V (C3 and C4). In addition to these capacitors, it is suggested to add two ceramic capacitors of
1uF, X7R, 100V each (C2, C8), as well as a further decoupling capacitor of 100nF close to the VIN/VAUX pins (C9).
VIN and VAUX pins can be short-circuited when the device is used in buck mode, or can be driven from a separate
supply.
The shaping capacitor C1 is fundamental for the stability of the control loop. To this end it should be placed no more
Input voltage pins, VIN and VAUX, need to be decoupled. It is recommended to use two ceramic capacitors of
60V LED driver
60V MOSFET
45V 10A SBR
33uH 4.2A
100pF 50V
1uF 50V X7R
4.7uF 50V X7R
300mΩ 1%
400mΩ 1%
0Ω
Value
Figure 39: Application circuit: 2.8A Buck LED driver
ZXLD1370
ZXMN6A09K
SBR10U45SP5
744770933
SMD 0805/0603
SMD1206
SMD1210
SMD1206
SMD1206
SMD 0805/0603
Part No.
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Diodes Inc
Diodes Inc
Diodes Inc
Wurth Electronik
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Manufacturer
Diodes Incorporated
A Product Line of
© Diodes Incorporated
ZXLD1370
May 2010