November 2006

P2040B

rev 0.2

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

•

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.

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 allows significant system cost savings by

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

The P2040B is targeted towards digital flat panel

applications for Notebook PCs, Palm-size PCs, Office

Automation Equipments and LCD Monitors.

Block Diagram

Loop

Filter

Output

Divider

Modulation

SR0

ModOUT

CLKIN

Frequency

Divider

Feedback

Divider

Phase

Detector

VCO

PLL

CP1 CP0 SSON#