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參數(shù)資料
| 型號： | TDA9110 |
| 廠商： | 意法半導體 |
| 英文描述： | LOW-COST DEFLECTION PROCESSOR FOR MULTISYNC MONITORS |
| 中文描述： | 低費用偏轉處理器多同步監(jiān)測儀 |
| 文件頁數(shù)： | 19/29頁 |
| 文件大?。?/td> | 268K |
| 代理商： | TDA9110 |
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H-DRIVE
26
V
CC
9
Figure 15
II.4 - Output Section
The H-drive signal is sent to the output through a
shaping block ensuring Ts and H-drive duty cycle
(I2Cadjustable)(seeFigure13).In orderto secure
the scanning power part operation, the output is
inhibitedin the followingcases :
- when V
CC
is too low,
- when the Xray protectionis activated,
- during the Horizontalflyback,
- when the HDrive I
2
C bitcontrol is off.
Theoutputstageconsistsof a NPNbipolartransis-
tor.Onlythecollectoris accessible(seeFigure15).
HORIZONTAL
OUTPUT
INHIBITION
VERTICAL
OUTPUT
INHIBITION
S
R
Q
Horizontal Flyback
0.7V
XRAY Protection
V
CC
Checking
V
CC
Ref
V
CC
off or I
2
C Reset
XRAY
I
2
C Drive on/off
I
2
C Ramp on/off
9
Figure 16 :
SafetyFunctions Block Diagram
OPERATINGDESCRIPTION
(continued)
The output NPN is in off-state when the power
scanningtransistoris alsoin off-state.
The maximum output current is 30mA, and the
corresponding voltage drop of the output V
CEsat
is
0.4V typically.
Obviouslythe powerscanningtransistorcannotbe
directlydrivenbytheintegratedcircuit.Aninterface
hasto beadded betweenthe circuitand thepower
transistoreither of bipolaror of MOStype.
II.5 - X-RAYProtection
The X-Ray protectionis activatedby applicationof
a highlevel on theX-Rayinput (8Von Pin25).The
consequenciesof X-Ray protectionare :
- inhibitionof H-Driveoutput
- activation of vertical blankingoutput.
This protection is reset either by V
CC
switch off or
by I
2
C (see Figure 16).
II.6 - Horizontal and VerticalDynamic Focus
TheTDA9110deliversa horizontalparabolawhich
is added on a vertical parabola waveform on Pin
15. This horizontal parabola comes from a saw-
tooth. The phase advance versus Horizontal fly-
back middle is kept constant for each frequency
(about 860ns). This sawtooth is presenton Pin 16
where the horizontal focus capacitor is the same
as C0 to obtain a controlled amplitude (from 2 to
4.7Vtypically).
Symmetry(keystone)andamplitudeareI
2
Cadjust-
able(seeFigure17). The Verticaldynamicfocusis
trackedwithVPOSand VAMP.Itsamplitudecan be
adjusted.Itis alsoaffectedby S andC corrections.
Thispositivesignalhastobe connectedtotheCRT
focusinggrids.
TDA9110
19/29
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| TDA9112A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:HIGH-END I2C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITOR |
| TDA9113 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW-COST I2C CONTROLLED DEFLECTION PROCESSOR FOR MULTISYNC MONITOR |
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