STV2145 datasheet(1/17 Pages) STMICROELECTRONICS

Numer części	STV2145

Szczegółowy opis	I2C BUS CONTROLLED EAST-WEST AND VERTICAL INTERFACE

PDF	17 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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1 / 17 page

STV2145

I

2C BUS CONTROLLED EAST-WEST

AND VERTICAL INTERFACE

April 1996

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16

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9

SENSM

SENSP

FROUT

EWOUT

EWIN

OBLK

HFLY

BREATH

SCL

SDA

VRET

REG

V

CC

LPF

CVERT

GND

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

I2C BUS SERIAL CLOCK

I2C BUS SERIAL DATA

VERTICAL RETRACE PULSE

(FROM STV2118A)

REGULATOR OUTPUT

FOR SERIES TRANSISTOR

REGULATED VOLTAGE SUPPLY

LOOP FILTER FOR 2H-PLL

VERTICAL AGC CAPACITOR

GROUND

PIN CONNECTIONS

DIP16

(Plastic Package)

ORDER CODE : STV2145

.

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

2C 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

° 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.

1/17

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