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FAN5343UMPX データシート(PDF) 9 Page - Fairchild Semiconductor

部品番号 FAN5343UMPX
部品情報  6-LED Series Boost LED Driver with Integrated Schottky Diode and Single-Wire Digital Interface
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メーカー  FAIRCHILD [Fairchild Semiconductor]
ホームページ  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN5343UMPX データシート(HTML) 9 Page - Fairchild Semiconductor

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© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5343 • Rev. 1.0.4
9
Application Information
Inductor and Output Capacitor Selection
Table 1.
Recommended External Components
# of LEDs
L
Part Number
Manufacturer
Min. COUT
Part Number
Manufacturer
5, 6
10.0µH
LQH43MN100K03
Murata
1.00µF
UMK212BJ105KG
Taiyo Yuden
NLCV32T-100K-PFR
TDK
VLF3010AT-100MR49-1
TDK
Component Placement and PCB Recomendations
Figure 15. Recommended Component Placement
Input Capacitance
In a typical application, the input and output capacitors
should be placed as close to the IC as possible; no
additional capacitance is needed to ensure proper
functionality. However, in a testing environment, where the
FAN5343 is typically powered by a power supply with
relatively long cables, an additional input capacitor (10µF)
may be needed to ensure stable functioning. This
capacitor should be placed close to where the power
supply cables attach to the FAN5343 evaluation board.
PCB Recommendations
The inductor can be connected to VIN with vias through
another layer if needed.
The feedback pin should be connected back to the IC
on a sub-layer.


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