Overview: As wireless communication
devices are being designed to meet 3G specifications, power budgeting has
moved from important to critical. The use of more efficient power conversion
schemes support cell phone manufacturers' need to continually (and simultaneously)
improve battery life, talk time and bandwidth. This online seminar is focused
on powering RF power amplifiers in mobile phones or RF wireless cards, using
a high efficiency magnetic buck converter.
Length: 60 minutes
Published Date: August 2005
Topics covered in this online seminar include:
- Evolution in cellular technologies and data rates
- Type of Power Amplifiers – Comparison between Linear and Non-Linear
- Conventional method of Powering RF PA's and its drawbacks
- New method of Powering RF PA's with magnetic buck converters
- System advantages and comparison of the two methods
- Key features of magnetic buck converters for this application space
- Differences in features for a RF PA buck compared to a baseband core
buck
- A look at some parts for powering RF PA's like LM3200, LM3203, LM3204,
LM3202, LM3205
- RF PA system application circuits using the LM3205 as an example
Presenter: Mathew Jacob is an
Applications Engineering Manager with National Semiconductor's Portable
Power Group in Santa Clara, California. |
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Presentation
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