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STV9302STN/a2000avaiVERTICAL DEFLECTION PROCESSOR FOR MONITOR/TV. 2 APP/60V WITH FLYBACK GENERATOR


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STV9302
VERTICAL DEFLECTION PROCESSOR FOR MONITOR/TV. 2 APP/60V WITH FLYBACK GENERATOR
September 2003 1/15
Version 2.5
STV9302

VERTICAL DEFLECTION OUTPUT FOR MONITOR/ TV App/ 60 V WITH FL YBACK GENERA TOR
FEATURES
Power Amplifier Flyback Generator Output Current up to 2 App Thermal Protection
DESCRIPTION

The STV9302 is a vertical deflection booster
designed for monitor and TV applications.
This device, supplied with up to 32 V, provides up
to 2 App output current to drive the vertical
deflection yoke.
The internal flyback generator delivers flyback
voltages up to 60V.
PIN CONNECTION (top view)
BLOCK DIAGRAM

ELECTRICAL CHARACTERISTICS(VS = 35V, Tamb = 25°C, unless otherwise specified)
Note 7:
When (V2-V4) = 30V, the flyback peak voltage on pin 5 is approximatively equal to 60V.

APPLICATION HINTSThe yoke can be coupled either in AC or DC.
4.1 DC-coupled application

When DC coupled (see Figure 4), the display vertical position can be adjusted with input bias. On the other
hand, 2 supply sources (VS and -VEE ) are required.
Figure 4. DC coupled application

Ripple rejection
When both ramp signal and bias are provided by the same driver IC, you can gain natural rejection of any
ripple caused by a voltage drop in the ground (see Figure 5), if you manage to apply the same fraction of
ripple voltage to both booster inputs. For that purpose, arrange an intermediate point in the bias resistor
bridge, such that (R8 / R7 ) = (R3 / R2 ), and connect the bias filtering capacitor between the intermediate
point and the local driver ground. Of course, R7 should be connected to the booster reference point, which
is the ground side of R1.
Figure 5. Ripple rejection

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