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I2042AF-08TR Folha de dados(PDF) 1 Page - PulseCore Semiconductor

Nome de Peças I2042AF-08TR
Descrição Electrónicos  LCD Panel EMI Reduction IC
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Fabricante Electrônico  PULSECORE [PulseCore Semiconductor]
Página de início  http://www.onsemi.com/
Logo PULSECORE - PulseCore Semiconductor

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November 2006
P2042A
rev 1.4
Notice: The information in this document is subject to change without notice.
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200, Campbell, CA 95008
• Tel: 408-879-9077 • Fax: 408-879-9018
www.pulsecoresemi.com
LCD Panel EMI Reduction IC
Features
FCC approved method of EMI attenuation.
Provides up to 15dB of EMI suppression.
Generates a low EMI spread spectrum clock of
the input frequency.
Input frequency range: 30MHz to 110MHz.
Optimized for 32.5MHz, 54MHz, 65MHz and
108MHz pixel clock frequencies.
Internal loop filter minimizes external components
and board space.
Eight selectable high spread ranges up to ±
1.9%.
SSON# control pin for spread spectrum enable
and disable options.
Low cycle-to-cycle jitter.
3.3V ± 0.3V operating range.
Low power CMOS design.
Supports most mobile graphic accelerator and
LCD timing controller specifications.
Available in 8-pin SOIC and TSSOP Packages.
Product Description
The P2042A is a versatile spread spectrum frequency
modulator designed specifically for digital flat panel
applications.
The
P2042A
reduces
electromagnetic
interference (EMI) at the clock source, allowing system
wide reduction of EMI of down stream clock and data
dependent signals. The P2042A allows significant system
cost savings by reducing the number of circuit board
layers ferrite beads,
shielding and other passive
components that are traditionally required to pass EMI
regulations.
The P2042A uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented in a proprietary all digital method.
The P2042A 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’.
Applications
The P2042A is targeted towards digital flat panel
applications for notebook PCs, palm-size PCs, office
automation equipments and LCD monitors.
Block Diagram
VSS
Frequency
Divider
Feedback
Divider
Modulation
Phase
Detector
Loop
Filter
VCO
Output
Divider
PLL
VDD
SSON#
SR0 CP1 CP0
ModOUT
CLKIN


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