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I2040BF-08-SR bảng dữ liệu(PDF) 3 Page - PulseCore Semiconductor

tên linh kiện I2040BF-08-SR
Giải thích chi tiết về linh kiện  LCD Panel EMI Reduction IC
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November 2006
P2040B
rev 0.2
LCD Panel EMI Reduction IC
3 of 8
Notice: The information in this document is subject to change without notice.
P2040B
CLKIN
CP0
SR0
SSON#
CP1
VSS
ModOUT
1
2
3
4
5
6
7
8
VDD
+3.3V
Digital control for SS
enable or disable
0.1 µF
Modulation 65MHz signal
with +/- 1.56% Deviation
and Modulation Rate of
101.54 KHz. This signal is
connected back to the
Spread Spectrum input
Pin (SSIN) of the
Graphics Accelerator.
65MHz from Graphics
Spread Spectrum Selection
Table 1 illustrates 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, Pin 1).
Example: P2040B is designed for high resolution flat panel applications and is able to support panel frequencies from
30MHz to 100MHz. For a 65MHz pixel clock frequency, a spreading selection of CP0 = 0,CP1=1 and SR0=1 gives a
percentage deviation of +/-1.56% (see Table 1). This results in frequency on ModOUT being swept from 64.5MHz to
65.5MHz. This particular example given here is a common EMI reduction method for 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
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
VDD, VIN
Voltage on any pin with respect to Ground
-0.5 to +4.6
V
TSTG
Storage temperature
-65 to +125
°C
TA
Operating temperature
-40 to +85
°C
Ts
Max. Soldering Temperature (10 sec)
260
°C
TJ
Junction Temperature
150
°C
TDV
Static Discharge Voltage
(As per JEDEC STD22- A114-B)
2
KV
Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect
device reliability.


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