TDA8350 Philips Semiconductors, TDA8350 Datasheet - Page 4

• Manufacturer Part Number: TDA8350
• Description: DC-coupled vertical deflection and East-West output circuit
• Manufacturer: Philips Semiconductors

Philips Semiconductors
PINNING
January 1995
I
I
V
V
V
n.c.
GND
V
V
V
V
I
I
drive(pos)
drive(neg)
I(corr)
I(set)
SYMBOL
I(fb)
P
O(B)
FB
O(A)
O(guard)
O(sink)
DC-coupled vertical deflection and
East-West output circuit
I drive(pos)
I drive(neg)
V O(guard)
PIN
V O(sink)
10
12
13
11
1
2
3
4
5
6
7
8
9
I I(corr)
V O(B)
I I(set)
Fig.2 Pin configuration.
V O(A)
V I(fb)
GND
V FB
n.c.
V P
input power-stage (positive);
includes I
input power-stage (negative);
includes I
feedback voltage input
supply voltage
output voltage B
not connected
ground
flyback supply voltage
output voltage A
guard output voltage
East-West amplifier driver (sink)
output voltage
East-West amplifier input
correction current (negative)
East-West amplifier set input
current (positive)
10
11
12
13
1
2
3
4
5
6
7
8
9
TDA8350
I(sb)
I(sb)
DESCRIPTION
MBC226-1
signal bias
signal bias
4
FUNCTIONAL DESCRIPTION
The vertical driver circuit is a bridge configuration. The
deflection coil is connected between the output amplifiers,
which are driven in phase opposition. An external resistor
(R
internal feed back information. The differential input circuit
is voltage driven. The input circuit has been adapted to
enable it to be used with the TDA9150, TDA9151B,
TDA9160A, TDA9162, TDA8366 and TDA8367 which
deliver symmetrical current signals. An external resistor
(R
determines the output current through the deflection coil.
The relationship between the differential input current and
the output current is defined by: I
The output current is adjustable from 0.5 A (p-p) to 3 A
(p-p) by varying R
voltage is 1.8 V. In the application it is recommended that
V
spread of input current and the spread in the value of
R
The flyback voltage is determined by an additional supply
voltage V
voltages (class G) makes it possible to fix the supply
voltage V
supply voltage V
this method, very high efficiency is achieved.
The supply voltage V
flyback voltage across the coil, this being possible due to
the absence of a decoupling capacitor (not necessary, due
to the bridge configuration). The output circuit is fully
protected against the following:
A guard circuit V
activated at the following conditions:
This signal can be used for blanking the picture tube
screen.
An East-West amplifier is also provided. This amplifier is
an inverting amplifier which is current driven with sink
current only capabilities.
diff
CON
during flyback
during various short-circuit possibilities at the output
pins
during open loop
when the thermal protection is activated.
M
CON
thermal protection
short-circuit protection of the output pins (pins 5 and 9)
short-circuit of the output pins to V
) connected in series with the deflection coil provides
= 1.5 V (typ). This is recommended because of the
.
) connected between the differential input
FB
P
optimum for the scan voltage and the second
. The principle of operating with two supply
FB
O(guard)
M
optimum for the flyback voltage. Using
. The maximum input differential
FB
is almost totally available as
is provided. The guard circuit is
diff
Preliminary specification
P.
R
TDA8350Q
CON
= I
(coil)
R
M
.