STV9302A
Application Hints
4
Application Hints
The 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 (V and -V ) are required.
S
EE
A Stand-by state will be reached by switching OFF the positive supply alone. In this state, where
both inputs are the same voltage as pin 2 or higher, the output will sink negligible current from the
deviation coil.
Figure 4: DC-coupled Application
+Vs
Output
Voltage
CF (47 to 100µF)
3
470µF
Vref
0.1µF
6
2
Output
Current
Flyback
Generator
Ip
Power
Amplifier
Vertical Position
Adjustment
7
+
5
1
-
Thermal
Safety
Yoke
Ly
R3
1.5Ω
Rd(*)
VM
Vm
4
-VEE
0.1µF
470µF
R2
R1
Ly
50µs
Ly
20µs
(*) recommended:
------------- < R d < -------------
4.1.1 Application Hints
For calculations, treat the IC as an op-amp, where the feedback loop maintains V = V .
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7
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STMICROELECTRONICS [ ST ]
