TDA9102 ST Microelectronics, TDA9102 Datasheet - Page 5

• Manufacturer Part Number: TDA9102
• Description: H/V PROCESSOR FOR TTL V.D.U
• Manufacturer: ST Microelectronics

ELECTRICAL CHARACTERISTICS (continued)
f
R1 = 6.8k
R2 = 56 k
C2 = 1.8 nF
f
where: V
voltage range.
The voltage at Pin 3 is limited by two clamping
diodes at the voltage V
When the PLL1 is synchronized and perfectly
tuned, V
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 ”t
generator ”I
”C5”, according with the formula (B):
t
VERTICAL SECTION
Technical note 1
(T
pull-in
H (nom)
5
Symbol
C2
AMB
K
17
C5 . V
= f
2
H (nom)
= 25
= 26.8 kHz
I
HORIZONTAL
OSCILLATOR
3
5
1
Frequency drift versus supply voltage K
R1
= V
= 3.5V and V
5
o
1
5
C, V
1
” charging the external capacitor
V
.
3
B , t
I1
V
R2
S
1
if
V
/ R1
= 12V, refer to the test circuits, unless otherwise specified)
5
1
”, is generated by the current
5
=
3H
/ R2
T
12
C1
V
V
and V
H
3H
3L
3
= f
Parameter
3
1
- V
is recommended.
H (nom)
R3
C3
3L
1
I
I
is the control
o
f
HOR. SYNC.
V
V
3H
3L
17
V
V
(A)
DC
DC
dF .
dV .
10
f
V
6
Technical note 3
K
oscillator charging period of the waveform at
Pin 2:
K
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 (@ f
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
t
V
s
V
V
9
9
H
V
H
L
V
LL
= 67.5 degrees/volt represents the slope of the
= 6.8V
= 5.2V
t
=
s
V
= 6V
= 2V
V
V
S
360 x 0.75
Test conditions
V
H
V (V)
H
= 10.5V to 15.5V
L
V
4
V
V
LL
L
H
1/f
V
f
V
1
V
H
LL
= 27kHz).
degree
K
f
V
14
V
Min.
Typ. Max.
ts
300
TDA9102C
1/fv
Unit
ppm
V
t (s)
5/7