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參數(shù)資料
| 型號： | STV7778S-1 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | DEFLECTION PROCESSOR FOR MULTISYNC MONITOR |
| 中文描述： | 偏轉(zhuǎn)處理器多同步監(jiān)測 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大小： | 125K |
| 代理商： | STV7778S-1 |
STV7778S
DEFLECTION PROCESSOR FOR MULTISYNC MONITOR
DUAL PLL CONCEPT
.
SELF-ADAPTIVE (30 TO 70kHz)
.
X-RAY PROTECTION INPUT
.
DC ADJUSTABLE DUTY-CYCLE
.
INTERNAL 1st PLL LOCK/UNLOCK IDENTIFI-
CATION
.
WIDE RANGE DC CONTROLLED H-POSITION
.
ON/OFF SWITCH (FOR PWR MANAGEMENT)
.
TWO H-DRIVE POLARITIES
VERTICAL RAMP GENERATOR
.
45 TO 120Hz AGC LOOP
.
DC CONTROLLED V-AMP, V-POS, S-AMP
AND S-CENTERING
.
ON/OFF SWITCH
INTERNAL PWM GENERATOR FOR B+
CURRENT MODE STEP-UP CONVERTER
.
DC ADJUSTABLE B+ VOLTAGE
.
OUTPUT PULSES SYNCHRONISED ON
HORIZONTAL FREQUENCY
.
INTERNAL MAX CURRENT LIMITATION
.
VERTICAL PARABOLA GENERATOR WITH DC
CONTROLLED KEYSTONE AND AMPLITUDE
.
COMPARED WITH THE STV7778, THE
STV7778S HAS AN INTERNAL METAL SHIELD
PROTECTION AGAINST OVERVOLTAGE.
.
POS/NEG H AND V SYNC POL
.
SEPARATED H AND V TTL INPUT
.
SAFETY BLANKING OUTPUT
September 1998
SHRINK42
(Plastic Package)
ORDER CODE :
STV7778S
HORIZONTAL
VERTICAL
B+ REGULATOR
EWPCC
GENERAL
DESCRIPTION
The STV7778S is a monolithic integrated circuit
assembled in a 42 pins shrunk dual in line plastic
package.
The goal of this IC is to control all the functions
related to the horizontal and vertical deflection in a
multimodes or multisync monitor.
As can be seen in the block diagram, the
STV7778S includes the following functions :
- Positive or Negative sync polarities,
- Auto-sync horizontal processing,
- H-PLL lock/unlock identification,
- Auto-sync Vertical processing,
- East/West signal processing block,
- B+ controller,
- Safety blanking output.
An internal metal shield give to the STV7778S more
immunity against electromagnetic and electrostatic
fields, and therefore, additional safety for critical
applications (for example, in case of CRTs with
small coated area).
1/11
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