- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372453 > TDA9105A (意法半導(dǎo)體) DEFLECTION PROCESSOR FOR MULTISYNC MONITORS PDF資料下載
參數(shù)資料
| 型號(hào)： | TDA9105A |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | DEFLECTION PROCESSOR FOR MULTISYNC MONITORS |
| 中文描述： | 偏轉(zhuǎn)處理器多同步監(jiān)測(cè)儀 |
| 文件頁數(shù)： | 21/31頁 |
| 文件大?。?/td> | 340K |
| 代理商： | TDA9105A |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當(dāng)前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁
OPERATING DESCRIPTION
(continued)
VERTICALPART
(continued)
Function
When the synchronisationpulse is not present,an
internal current source sets the free running fre-
quency.For an external capacitor, C
OSC
= 150nF,
the typical free running frequencyis 100Hz.
Typical free running frequency can be calculated
by :
f
0
(
Hz
) =
1.5
10
5
1
C
OSC
(
nF
)
A negative or positive TTL level pulse applied on
Pin 34 (VSYNC) can synchronise the ramp in the
frequencyrange[fmin,fmax].Thisfrequencyrange
depends on the external capacitor connected on
Pin 27. A capacitor in the range [150nF,220nF] is
recommanded for application in the following
range: 50Hz to 120Hz.
Typicalmaximum andminimum frequency,at 25
°
C
and without any correction (S correction or C cor-
rection),can be calculatedby :
f
max
= 2.5
f
0
andf
min
= 0.33
f
0
If S or C corrections are applied, these values are
slighty affected.
If an externalsynchronisationpulse is applied,the
internal oscillator is automaticaly caught but the
amplitudeis no moreconstant.An internalcorrec-
tion is activated to adjust it in less than half a
second:the highestvoltageof the ramp on Pin 27
issampledonthesamplingcapacitorconnectedon
Pin 25 (VAGCCAP) at each clock pulse and a
transconductanceamplifier generates the charge
current of the capacitor. The ramp amplitude be-
comesagain constant.
Itis recommandedto usea AGCcapacitorwithlow
leakagecurrent. Avalue lowerthan 100nAis man-
datory.
Pin 36, Vfly is the vertical flyback input used to
generate the composite blanking signal. If Vfly is
not used, (V
REF
- 0.5), at minimum, must be con-
nected to thisinput.
DCControl Adjustments
Then, S and C correctionshapescan be added to
this ramp. This frequency independent S and C
corrections are generated internally; their ampli-
tude are DC adjustable on Pin 28 (V
SAMP
) and
Pin 29 (COR-C).
S correction is non effective for V
SAMP
lower than
V
REF
/4 and maximum for V
SAMP
= 3/4
V
REF
.
C correction is non effectivefor COR-C grounded
and maximum for :
COR-C = V
REF
/4 or COR-C = 3/4
V
REF
.
Endly,theamplitudeofthisSandCcorrectedramp
can be adjusted by the voltage applied on Pin 31
(V
AMP
). The adjusted ramp is available on Pin 30
(V
OUT
) to drivean external power stage. The gain
of thisstageis typically
±
30%whenvoltageapplied
on Pin 31 is in the rangeV
REF
/4 to 3/4
V
REF
. The
DC value of this ramp is kept constant in the
frequencyrange , for any correction applied on it.
Its typicalvalue is : V
DCOUT
= V
MID
= 7/16
V
REF
.
A DC voltageis availableon Pin 32 (V
DCOUT
). It is
driven by the voltageappliedon Pin33 (V
POS
)
For a voltage control range between V
REF
/4 and
3/4
V
REF
, the voltageavailableon Pin 32 is :
V
DCOUT
= 7/16
V
REF
±
300mV.
So,theV
DCOUT
voltageis correlatedwithDC value
of V
OUT
. It increasesthe accuracy when tempera-
ture varies.
Basic Equations
In firstapproximation,the amplitudeof therampon
Pin 30 (V
OUT
) is :
V
OUT
- V
MID
= (V
CAP
- V
MID
) [1 + 0.16
(V
AMP
- V
REF
/2)]
with V
MID
= 7/16
V
REF
; typically3.5V
V
MID
is themiddlevalue of theramponPin27
V
CAP
= V
27
, rampwith fixed amplitude.
On Pin 32 (V
DCOUT
), the voltage(in volts)is calcu-
lated by : V
DCOUT
=V
MID
+ 0.16
(V
POS
- V
REF
/2).
V
POS
is the voltageapplied on Pin 33.
The current availableon Pin 27
(when V
SAMP
= V
REF
/4) is :
I
OSC
= 3/8
V
REF
C
OSC
f
C
OSC
: capacitorconnected on Pin 27
f synchronisationfrequency
The recommanded capacitor value on Pin 25
(V
AGC
) is 470nF.Its ensuresa good stabilityof the
internal closed loop.
TDA9105A
21/31
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA9105 | Deflection Processor for Multisync Monitors(偏轉(zhuǎn)處理器) |
| TDA9106A | LOW COST DEFLECTION PROCESSOR FOR MULTISYNC MONITORS |
| TDA9106 | LOW COST DEFLECTION PROCESSOR FOR MULTISYNC MONITORS |
| TDE1737 | Interface Circuit - Relay and Lamp-Driver(接口電路(單片放大器驅(qū)動(dòng)繼電器和電子管)) |
| TDE1779ASP | DUAL 2-A SOURCE DRIVER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA9106 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW COST DEFLECTION PROCESSOR FOR MULTISYNC MONITORS |
| TDA9106A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW COST DEFLECTION PROCESSOR FOR MULTISYNC MONITORS |
| TDA9108 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MONITOR HORIZONTAL PROCESSOR |
| TDA9109 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW-COST DEFLECTION PROCESSOR FOR MULTISYNC MONITORS |
| TDA9109A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW-COST I2C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITOR |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。