FAN5341 Fairchild Semiconductor, FAN5341 Datasheet - Page 9

• Manufacturer Part Number: FAN5341
• Description: Fan5341 Series Boost Led Driver With Integrated Schottky Diode And Single-wire Digital Interface
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN5341 • Rev. 1.0.0
Application Information
Inductor & Output Capacitor Selection
Component Placement and PCB Recomendations
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
FAN5341 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 FAN5341 evaluation board.
# of LEDs
3, 4, 5
Inductor (L)
10.0µH
4.7µH
Part Number
LQH43MN100K03
NLCV32T-100K-PFR
VLF3010AT-100MR49-1
LQH43MN4R7K03
NLCV32T-4R7M-PFR
LPF2010T-4R7M
Figure 1. Recommended Component Placement
Table 1. Recommended External Components
Murata
TDK
Murata
TDK
ABCO
Manufacturer
TDK
9
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.
Min C
1.00µF
1.00µF
OUT
Part Number
CV105X5R105K25AT
CV105X5R105K25AT
www.fairchildsemi.com
AVX/Kyocera
AVX/Kyocera
Manufacturer