TEA2037 ST Microelectronics, TEA2037 Datasheet - Page 4

• Manufacturer Part Number: TEA2037
• Description: HORIZONTAL AND VERTICAL DEFLECTION MONITOR
• Manufacturer: ST Microelectronics

ELECTRICAL CHARACTERISTICS (T
TEA2037A
4/9
FRAME OUTPUT (PIn 8)
FLYBACK GENERATOR (Pins 2 and 3)
The TEA2037A performs all the video and power
functions required to provide signals for the direct
drive of the line darlington and frame yoke.
It contains :
- A shunt regulator
- A synchronization separator
- An integrated frame separator without external
- A saw-tooth generator for the frame
- A power amplifier for direct drive of frame yoke
- An open collector output for the line darlington drive
- A line phasedetectorand a voltage control oscillator
Figure 1 : Synchronization Separator Circuit
Symbol
components
(short circuit protected)
HV8A
HV8B
FSVA
FSVB
LV8A
LV8B
FV8A
FV8B
F2DA
F2DB
FCI
Video
Saturation Voltage to Ground (V
I
I
Saturation Voltage to V
I
I
Saturation Voltage to V7 in Flyback Mode (V
I
I
Flyback Transistor on (output = high state) (V
V3/2 with I
V2/3 with I
Flyback Transistor off (output = V
Leakage Current Pin 2
8
8
8
8
8
8
= 0.1
= 1A
= -0.1
= -1A
= 0.1
= 1A
V
I
I
R
R1
3
3
3
3
2
2
2
2
= 0.1A
= 1A
= 0.1
= 1A
15
R2
7
(V
7
= 30V)
Parameter
SL1 SL2
7
amb
7
= 30V)
- 8V) (V
= 25
o
7
C) (continued)
= V
8
2
> V
= 30V)
2
= 30V)
7
)
The slice level of sync-separation is fixed by value
of the external resistors R
nally fixed voltage.
The sync-pulse allows the discharge of the capaci-
tor by a 2 x 1 current. A line sync-pulse is not able
to discharge the capacitor underV
pulse permits the complete discharge of the ca-
pacitor, so during the frame sync-pulse Q3 and Q4
provide current for the other parts of the circuit.
Figure 2 : Frame Separator
The oscillator thresholds are internally fixed by
resistors. The discharge of the capacitor depends
on the internal resistor R4. The control voltage is
applied on resistor R5.
SL1
3I
I
Min.
1
0.0.6
and R
Typ.
0.37
1.3
1.7
1.6
2.5
1.5
3.0
0.8
2.2
Z
2
/2. Aframe sync
. V
V
Max.
V
170
0.6
1.6
2.4
2.1
4.5
2.1
4.5
1.1
4.5
Z
Z
1
R
ST1
/2
Q3
is an inter-
Unit
ST2
Q4
V
V
V
V
V
V
V
V
V
V
A