I2040AF-08-SR 查看數據表（PDF） - PulseCore Semiconductor

零件编号

产品描述 (功能)

生产厂家

I2040AF-08-SR

LCD Panel EMI Reduction IC

PulseCore Semiconductor 

November 2006

rev 1.3

Spread Spectrum Selection

P2040A

The Modulation Selection Table defines the possible spread spectrum options. The optimal setting should minimize system

EMI to the fullest without affecting system performance. The spreading is described as a percentage deviation of the center

frequency. (Note: The center frequency is the frequency of the external reference input on CLKIN, pin1).

For example, P2040A is designed for high-resolution, flat panel applications and is able to support an XGA (1024 x 768)

flat panel operating at 65MHz (FIN) clock speed. A spreading selection of MRA=0, SR1=1 and SR0=0 provides a percentage

deviation of ±0.75% from FIN. This results in the frequency on ModOUT being swept from 64.51MHz to 65.49MHz at a

modulation rate of 56.24KHz. Refer Modulation Selection Table. The example in the following illustration is a common EMI

reduction method for a notebook LCD panel and has already been implemented by most of the leading OEM and mobile

graphic accelerator manufacturers.

Application Schematic for Mobile LCD Graphics Controllers

65MHz from graphics accelerator

1 CLKIN

VDD 8

2 MRA

SR0 7

3 SR1

ModOUT 6

4 VSS

SSON# 5

P2040A

0.1µF

+3.3V

Modulated 65MHz signal with

±0.75 deviation and modulation

rate of 56.24KHz. This signal is

connected back to the spread

spectrum input pin (SSIN) of the

graphics accelerator.

Digital control for the SS enable

or disable

LCD Panel EMI Reduction IC

Notice: The information in this document is subject to change without notice.

4 of 9

Share Link: