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STV2145 Datasheet

  • STV2145

  • I2C BUS CONTROLLED EAST-WEST AND VERTICAL INTERFACE

  • 17頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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STV2145
I
2
C BUS CONTROLLED EAST-WEST
AND VERTICAL INTERFACE
.
.
.
.
.
.
.
INTEGRATED VERTICAL SAWTOOTH GEN-
ERATOR WITH AMPLITUDE CONTROL
LOOP (50Hz - 60Hz)
INTERLACE MODE INTRINSICALLY CON-
TROLLED BY STV2118A
VERTICAL SIZE CORRECTION (BREATH-
ING) TO ADAPT DEFLECTION SENSITIVITY
TO THE CURRENT BEAM (HIGH VOLTAGE
VARIATION)
BUS ADJUSTED VERTICAL PARAMETERS :
VERTICAL AMPLITUDE, VERTICAL POSI-
TION AND S-CORRECTION
EAST-WEST FUNCTION GENERATOR WITH
INTEGRATED ERROR AMPLIFIER (THUS,
ONLY 1 EXTERNAL POWER DARLINGTON
IS NECESSARY FOR EW-FUNCTION)
BUS CONTROLLED EAST-WEST FUNC-
TIONS : EW-AMPLITUDE, HORIZONTAL
WIDTH, EW-TILT AND EW-SHAPE (CORNER
CORRECTION)
OVERSIZE BLANKING (VERTICAL AND
HORIZONTAL) WHICH PERMIT ZOOM AND
SUBTITLE FACILITIES FOR 4/3 AND 16/9
CRTs
DESCRIPTION
The STV2145 is an I
2
C bus processor containing
the vertical deflection East-West functions and
oversize blanking. This circuit is foreseen as ADD-
ON for the Video Chroma Processor STV2118A
to permit 110擄 CRT applications covering standard
4/3 screen format and new 16/9 format with zoom
and subtitle facilities. STV2145 has been designed
to drive a standard TDA8172/8177 vertical booster
and an external transistor for East-West.
DIP16
(Plastic Package)
ORDER CODE :
STV2145
PIN CONNECTIONS
I
2
C BUS SERIAL CLOCK
I
2
C BUS SERIAL DATA
VERTICAL RETRACE PULSE
(FROM STV2118A)
REGULATOR OUTPUT
FOR SERIES TRANSISTOR
REGULATED VOLTAGE SUPPLY
LOOP FILTER FOR 2H-PLL
SCL
SDA
VRET
REG
V
CC
LPF
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SENSM
SENSP
FROUT
EWOUT
EWIN
OBLK
HFLY
BREATH
RESISTOR BRIDGE
DIFFERENTIAL INPUT
FRAME OUTPUT ERROR SIGNAL
EAST-WEST ERROR AMPLIFIER OUTPUT
EAST-WEST ERROR AMPLIFIER INPUT
OPEN COLLECTOR BLANKING SIGNAL
HORIZONTAL FLYBACK INPUT
(CURRENT INPUT)
VERTICAL SIZE MODULATION
2145-01.EPS
VERTICAL AGC CAPACITOR
CVERT
GROUND
GND
April 1996
1/17

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