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P2040A 参数 Datasheet PDF下载

P2040A图片预览
型号: P2040A
PDF下载: 下载PDF文件 查看货源
内容描述: 液晶面板降低EMI IC [LCD Panel EMI Reduction IC]
分类和应用:
文件页数/大小: 9 页 / 353 K
品牌: ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
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October 2005
rev 1.2
LCD Panel EMI Reduction IC
Features
FCC approved method of EMI attenuation.
Provides up to 20dB of EMI suppression.
Generates a low EMI spread spectrum clock of the
input frequency.
Input frequency range: 30MHz to 100MHz.
Optimized for VGA, SVGA, and higher resolution
XGA LCD Panels.
Internal loop filter minimizes external components
and board space.
Six selectable high spread ranges up to ± 2%.
Two selectable modulation rates.
SSON# control pin for spread spectrum enable and
disable options.
Low cycle-to-cycle jitter.
Wide operating range.
Low power CMOS design.
Supports
most
mobile
graphic
accelerator
specifications.
Products available for automotive temperature
range.
(Refer Spread Spectrum Range Selection
Tables)
Available in 8-pin SOIC and TSSOP Packages.
applications.
The
P2040A
reduces
P2040A
electromagnetic
interference (EMI) at the clock source, allowing system
wide reduction of EMI of
down stream clock and data
dependent signals. The P2040A allows significant system
cost savings by reducing the number of circuit board
layers ferrite beads,
regulations.
The P2040A uses the most efficient and optimized
modulation
profile
approved
by
the
FCC
and
is
implemented in a proprietary all digital method.
The P2040A modulates the output of a single PLL in
order to “spread” the bandwidth of a synthesized clock,
and more importantly, decreases the peak amplitudes of
its harmonics. This results in significantly lower system
EMI compared to the typical narrow band signal produced
by oscillators and most frequency generators. Lowering
EMI by increasing a signal’s bandwidth is called ‘spread
spectrum clock generation’.
shielding and other passive
components that are traditionally required to pass EMI
Applications
The P2040A is targeted towards digital flat panel
applications for notebook PCs, palm-size PCs, office
automation equipments and LCD monitors.
Product Description
The P2040A is a versatile spread spectrum frequency
modulator designed specifically for digital flat panel
Block Diagram
SR0 SR1 MRA SSON#
VDD
Modulation
CLKIN
Frequency
Divider
Feedback
Divider
PLL
Phase
Detector
Loop
Filter
VCO
Output
Divider
ModOUT
VSS
Alliance Semiconductor
2575 Augustine Drive
Santa Clara, CA
Tel: 408.855.4900
Fax: 408.855.4999
www.alsc.com
Notice: The information in this document is subject to change without notice.