TDA9102 データシートの表示（PDF） - STMicroelectronics
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TDA9102 Datasheet PDF : 7 Pages
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TDA9102C
ELECTRICAL CHARACTERISTICS (continued)
(TAMB = 25oC, VS = 12V, refer to the test circuits, unless otherwise specified)
Symbol
Parameter
Test conditions Min. Typ. Max. Unit
VERTICAL SECTION
K17
Frequency
drift
versus
supply
voltage
K17 =
dF . 106
dV . fV
VS = 10.5V to 15.5V
300
ppm
V
Technical note 1
HORIZONTAL
OSCILLATOR
Technical note 3
K9 = 67.5 degrees/volt represents the slope of the
oscillator charging period of the waveform at
ϕ1
HOR. SYNC.
Pin 2:
K9
= 360 x 0.75
4
degree
V
V3H
V3H VDC
2
C2
1 R2
if
R1
I1
V3L
3
C1 R3
V3L VDC
Technical note 4
The second PLL can recover the storage of hori-
zontal output stage maintaining a constant duty
cycle till the trailing edge of the output pulse gets
the trailing edge of the flyback pulse. From this
point on, only the leading edge of the output pulse
will be shifted covering a total phase shift of: 0.30T;
overcoming this value, it will produce a notch in the
output pulse (@ fH = 27kHz).
C3
fH (nom) = 26.8 kHz
R1 = 6.8k Ω
R2 = 56 kΩ
C2 = 1.8 nF
fpull-in
=
fH
( nom)
V3 − V1
V1 / R1
/
R2
=
fH (nom)
If
Io
(A)
where: V1 = 3.5V and V3 - V1 is the control
voltage range.
The voltage at Pin 3 is limited by two clamping
diodes at the voltage V3H and V3L
When the PLL1 is synchronized and perfectly
tuned, V3 = V1.
Technical note 5
The voltage reference at Pin 19 can be used to
polarize the DC operating point of the vertical
booster. This voltage corresponds to the double of
the mean value voltage of the vertical sawtooth at
Pin 13.
Technical note 6
V (V)
VH = 6.8V
V = 6V
VL = 5.2V
Remark: The value of C2 influences the horizontal
oscillator free running frequency; it doesn’t effect
the relative pull-in range. If the horizontal fre-
quency is changed by using R1, the pull-in range
changes accordingly with the formula (A).
Technical note 2
The internal pulse ”t5”, is generated by the current
generator ”I5” charging the external capacitor
”C5”, according with the formula (B):
t5
=
C5 .
I5
V5
(B),
t5
=
TH
12
is recommended.
VLL = 2V
VH −
ts
VL
=
VH − VLL
1/fV
ts
=
(VH − VL)
(VH − VLL)
1
fV
=
K14
fV
t (s)
1/fv
ts
5/7
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