FMS6364A Fairchild Semiconductor, FMS6364A Datasheet - Page 9

• Manufacturer Part Number: FMS6364A
• Description: Low-cost Four-channel Standard Definition Sd & High Hd Definition Video Filter Driver
• Manufacturer: Fairchild Semiconductor

© 2010 Fairchild Semiconductor Corporation
FMS6364A • Rev. 3.0.1
The same method can be used for biased signals. The
Pb and Pr channels are biased to set the DC level to
500mV.
The same circuits can be used with AC-coupled outputs
if desired.
Note:
5.
External video
source must
be AC coupled
Figure 18. Biased SCART with AC-Coupled Outputs
DVD or
Output
DAC
STB
SoC
The video tilt or line time distortion is dominated by
the AC-coupling capacitor. The value may need to
be increased beyond 220μF to obtain satisfactory
operation in some applications.
Figure 17. AC-Coupled Inputs and Outputs
75Ω
0.1μ
0.1μ
0V - 1.4V
0V - 1.4V
Clamp
Active
LCVF
Clamp
Active
LCVF
75Ω
75Ω
220μ
220μ
9
Power Dissipation
The FMS6364A output drive configuration must be
considered when calculating overall power dissipation.
Care must be taken not to exceed the maximum die
junction temperature. The following equations can be
used to calculate the power dissipation and internal
temperature rise.
Board layout can also affect thermal characteristics.
Refer to the Layout Considerations section for details.
The FMS6364A is specified to operate with output
currents typically less than 50mA, more than sufficient
for a dual (75Ω) video load. Internal amplifiers are
current limited to a maximum of 100mA and should
withstand brief-duration short-circuit conditions. This
capability is not guaranteed.
T
where:
P
P
where:
V
I
V
I
V
R
CH
CC
J
D
CHx
O
IN
CC
L
= T
= channel load resistance.
= P
= 2V
= (I
= 50mA
= RMS value of input signal
= 3.3V
= V
A
CH1
CC
+ P
IN
CC
/3) + (V
+ 0.280V
+ P
D
• I
• J
CH
CH2
- (V
O
A
+ P
/R
O2
L
)
CH3
/R
L
and
)
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