P2040B Datasheet, PDF (1/8 Pages) PulseCore Semiconductor – LCD Panel EMI Reduction IC

November 2006
rev 0.2
P2040B
LCD Panel EMI Reduction IC
Features
• Provides up to 15dB of EMI suppression
• FCC approved method of EMI attenuation
• Generates a low EMI spread spectrum clock of the
input frequency
• 30MHz to 100MHz input frequency range
• Optimized for 32.5MHz, 54MHz, 65MHz, 81MHz,
pixel clock frequencies
• Internal loop filter minimizes external components
and board space
• 8 selectable spread ranges, up to +/- 2.0%
• SSON# control pin for spread spectrum enable
and disable options
• Low cycle-to-cycle jitter
• 3.3V operating voltage
• Ultra low power CMOS design
• Supports most mobile graphic accelerator and
LCD timing controller specifications
• Available in 8 pin SOIC and TSSOP Packages.
reducing the number of circuit board layers and shielding
that are traditionally required to pass EMI regulations.
The P2040B uses the most efficient and optimized
modulation profile approved by the FCC and is
implemented in a proprietary all digital method.
The P2040B 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
Product Description
The P2040B is a selectable spread spectrum frequency
modulator designed specifically for digital flat panel
applications. The P2040B reduces electromagnetic
interference (EMI) at the clock source which provides
system wide reduction of EMI of all clock dependent
signals.
The P2040B is targeted towards digital flat panel
applications for Notebook PCs, Palm-size PCs, Office
Automation Equipments and LCD Monitors.
The P2040B allows significant system cost savings by
Block Diagram
SR0 CP1 CP0 SSON#
V_DD
CLKIN
Frequency
Divider
Feedback
Divider
Modulation
Phase
Detector
Loop
Filter
PLL
VCO
Output
Divider
ModOUT
V_SS
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: [phone] • Fax: [phone]
www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.