tda8351aq NXP Semiconductors, tda8351aq Datasheet - Page 4

• Manufacturer Part Number: tda8351aq
• Description: Dc-coupled Vertical Deflection Output Circuit
• Manufacturer: NXP Semiconductors

Philips Semiconductors
PINNING
1999 Sep 27
I
I
V
V
V
n.c.
GND
V
V
V
n.c.
n.c.
n.c.
drive(pos)
drive(neg)
I(fb)
P
O(B)
FB
O(A)
O(guard)
DC-coupled vertical deflection output
circuit
SYMBOL
The die has been glued to the metal block of the package. If the metal
block is not insulated from the heat sink, the heat sink may only be
connected directly to pin 7.
handbook, halfpage
I drive(neg)
I drive(pos)
V O(guard)
Fig.2 Pin configuration.
PIN
10
11
12
13
V O(B)
V O(A)
1
2
3
4
5
6
7
8
9
V I(fb)
GND
V FB
n.c.
n.c.
n.c.
n.c.
V p
input power-stage (positive);
includes I
input power-stage (negative);
includes I
input feedback voltage
supply voltage
output voltage B
not connected
ground
input flyback supply voltage
output voltage A
guard output voltage
not connected
not connected
not connected
10
11
12
13
1
2
3
4
5
6
7
8
9
TDA8351A
DESCRIPTION
MGC056
I(sb)
I(sb)
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 opposite phase. An external resistor
(R
internal feedback 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). Built-in protections are:
A guard circuit V
activated at the following conditions:
This signal can be used for blanking the picture tube
screen.
diff
CON
during flyback
during short-circuit of the coil and during short-circuit of
the output pins (pins 5 and 9) to V
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 protection 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
TDA8351AQ
Product specification
P
R
or ground
CON
= I
coil
P
.
R
M
.