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AOZ7111 Datasheet(PDF) 12 Page - Alpha & Omega Semiconductors

Part # AOZ7111
Description  Critical Conduction Mode PFC Controller
Download  15 Pages
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Manufacturer  AOSMD [Alpha & Omega Semiconductors]
Direct Link  http://www.aosmd.com
Logo AOSMD - Alpha & Omega Semiconductors

AOZ7111 Datasheet(HTML) 12 Page - Alpha & Omega Semiconductors

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AOZ7111
Rev. 1.0 January 2013
www.aosmd.com
Page 12 of 15
Application Information
Alpha and Omega Semiconductor provides an EXCEL
based design tool, an application note and a
demonstration board to help the design of AOZ7111 and
reduce the R&D cycle time. All the tools can be download
from: www.aosmd.com.
PCB Layout Guide
The following are good PCB layout guideline for a PFC
stage:
1. To keep the IC GND pin as clean as possible, the
power stage ground and the signal ground must be
separated.
2. The PFC MOSFET gate drive loop path should be
minimized.
3. Minimize the trace length to INV pin. Since the
feedback node is high impedance the trace from the
output resistor divider to INV pin should be as short as
possible.
4. Switching current sense (CS pin) is very important for
the stable operation of PFC stage. Normally, a RC filter is
recommended to reduce the noise applied to the CS pin.
5. The VCC decoupling capacitor CVCC need to be placed
close to IC VCC and GND pin as much as possible.
Figure 7. Recommended PCB Layout


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