VESTEL 17MB12, Service Manual

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The outputs can drive AC or DC-coupled single (150 Ω ) or dual(75 Ω ) loads. DC-coupling
the outputs removes the need for output coupling capacitors. The input DC levels will be
offset approxi280mV at the output.
Features
•
Five fourth-order 8MHz (SD) filters
•
Transparent input clamping
•
Dual video load drive (2Vpp, 75 Ω )
•
AC or DC-coupled inputs
•
AC or DC-coupled outputs
•
DC-coupled outputs eliminate AC-coupling capacitors
•
5V only
•
Lead (Pb) Free TSSOP-14 package
Applications
•
Cable set top boxes
•
Satellite set top boxes
•
DVD players
•
HDTV
•
Personal video recorders (PVR)
•
Video on demand (VOD)
15 IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM
LM1117
LM1086
MP1593
FDC642P
SIL9011
24LC02
µPA672T
M74HC4052
Max809
24LC21
15.1 LM1117
15.1.1 General Description
The LM1117 is a series of low dropout voltage regulators with a dropout of 1.2V at
800mA of load current. It has the same pin-out as National Semiconductor’s industry
standard LM317. The LM1117 is available in an adjustable version, which can set the
output voltage from 1.25V to 13.8V with only two external resistors. In addition, it is also
available in five fixed voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V. The LM1117 offers
current limiting and thermal shutdown. Its circuit includes a zener trimmed bandgap
reference to as-sure output voltage accuracy to within ±1%. The LM1117 series is
available in SOT- 223, TO-220, and TO-252 D-PAK packages. A minimum of 10
μ F