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AS3665 Datasheet(PDF) 74 Page - ams AG

Part # AS3665
Description  9 Channel Advanced Command Driven RGB/White LED Driver
PDF  78 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3665 Datasheet(HTML) 74 Page - ams AG

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www.austriamicrosystems.com
Revision 1.0.2
73 - 77
AS3665
Datasheet, Confidential - Appl ica t io n I nf orma tio n E x ter nal Compon ents
12 Application Information
External Components
Low ESR input capacitors reduce input switching noise and reduce the peak current drawn from the battery. Low ESR
output capacitors should be used to minimize VOUT ripple.
Ceramic capacitors are required and should be located as close to the device as is practical. X5R dielectric material is
recommended due to their ability to maintain capacitance over wide voltage and temperature range.
Input, Output and C2V5 Capacitor
If a different input capacitor is chosen, ensure similar ESR value and at least 0.6µF capacitance at the maximum input
supply voltage. Larger capacitor values (C) for CBAT may be used without limitations.
Flying capacitors
If a different input capacitor is chosen, ensure similar ESR value and at least 0.3µF capacitance at the maximum out-
put voltage. Larger capacitor values (C) may be used without limitations.
PCB Layout Guideline
The high speed operation requires proper layout for optimum performance. Route the power traces first and try to min-
imize the area and wire length of the two high frequency/high current loops:
1. CBAT to CFLY1 and/or CFLY2
2. CFLY1 and/or CFLY2 to CVCPOUT
Table 109. Recommended Input, Output and C2V5 Capacitor
Name
Part Number
C
TC Code
Rated
Voltage
Size
Manufacturer
CBAT,
CVCPOUT,
C2V5
GRM188R60J105K
1.0µF +/-15%
X5R
6V3
0603
Murata
www.murata.com
223824613663
1.0µF +/-10%
X5R
10V
0603
Phycomp
www.phycomp.com
Table 110. Recommended Input, Output and C2V5 Capacitor
Name
Part Number
C
TC Code
Rated
Voltage
Size
Manufacturer
CFLY1,
CFLY2
GRM155R60J474K
470nF +/-15%
X5R
6V3
0402
Murata
www.murata.com
C0603C474K4RAC
470nF +/-10%
X7R
16V
0603
Kemet
www.kemet.com



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