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VPA2000 датащи(PDF) 21 Page - Renesas Technology Corp

номер детали VPA2000
подробное описание детали  TFT-LCD Power Supply with VCOM Amplifier
PDF  25 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

VPA2000 датащи(HTML) 21 Page - Renesas Technology Corp

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VPA2000
Product Data
March 11, 2010
21
LAYOUT GUIDELINES
To optimize the device performance, follow these layout
guidelines:
1.
Place the inductor and diode as close as possible to
Pin19 (SWN).
2.
Pin20 (GND1) is the power ground of the boost
converter. Return the boost output capacitors’ ground
connections to this pin while minimizing the loop area
created from pin 19 through the diode D1, through the
output capacitors, and back to pin 20.
3.
Separate all grounds on the top layer and connect all
ground connections through vias to the ground plane.
4.
Locate all feedback resistor dividers close to the
feedback pins. Keep the traces from feedback pins to
the resistor dividers as short as possible.
5.
Keep the traces from SWN to CGHFLY to D2 and D3
short.
6.
Keep the traces from SWN to CGLFLY to D4 and D5
short.
7.
Place output capacitors COUT1, CLDO, and CVCORE close
to their respective output pins.
8.
Keep all input decoupling capacitors close to the input
pins and return their ground connections directly to
the appropriate ground pin.
6
5
2
3
4
13
14
17
16
15
18
1
Copper
AVDD
VIN
Vias to
ground
plane
Vias to
power
plane
Vias to
ground
plane
CAVDD1
CAVDD2
D1
L1
Figure 38. Optimized Layout for Boost Converter



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