Philips tda8350 DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

TDA8350Q

DC-coupled vertical deflection and
East-West output circuit

Preliminary specification
Supersedes data of September 1991
File under Integrated Circuits, IC02

Philips Semiconductors

January 1995

Philips Semiconductors Preliminary specification

DC-coupled vertical deflection and

TDA8350Q

East-West output circuit

FEATURES

• Few external components

• Highly efficient fully DC-coupled vertical output bridge

circuit

• Vertical flyback switch

• Guard circuit

• Protection against:

– short-circuit of the output pins
– short-circuit of the output pins to V

P

• High EMC immunity due to common mode inputs

• Temperature (thermal) protection

• East-West output stage with one single conversion

resistor.

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

DC supply

V

P

I

P

supply voltage 9 − 25 V
quiescent current − 30 − mA

Vertical circuit

I

O(p-p)

I

diff(p-p)

output current (peak-to-peak value) −−3A
differential input current

(peak-to-peak value)

V

diff(p-p)

differential input voltage
(peak-to-peak value)

GENERAL DESCRIPTION

The TDA8350Q is a power circuit for use in 90° and 110°
colour deflection systems for field frequencies of 50
to 120 Hz. The circuit provides a DC driven vertical
deflection output circuit, operating as a highly efficient
class G system and an East-West driver for sinking the
diode modulator current.

− 600 −µA

− 1.5 1.8 V

Flyback switch

I

M

V

FB

peak output current −−±1.5 A
flyback supply voltage −−50 V

note 1 −−60 V

East-West amplifier

I

O(sink)

V

O(sink)

I

bias

output current (sink only) −−500 mA
peak output voltage I

=10µA −−40 V

O(sink)

input bias current −−1µA

Thermal data (in accordance with IEC 747-1)

T

stg

T

amb

T

vj

storage temperature −65 − 150 °C
operating ambient temperature −25 − +75 °C
virtual junction temperature −−150 °C

Note

1. A flyback supply voltage of>50 V up to 60 V is allowed in application. A 220 nF capacitor in series with a 22 Ω resistor
(dependent on I

and the inductance of the coil) has to be connected between pin 7 and ground. The decoupling

O

capacitor of VFB has to be connected between pin 8 and pin 4. This supply voltage line must have a resistance of
33 Ω (see application circuit Fig.5).

January 1995 2

Philips Semiconductors Preliminary specification

DC-coupled vertical deflection and

TDA8350Q

East-West output circuit

ORDERING INFORMATION

SOURCE

PACKAGE

V

FB

8

V

V

O(A)

P

9

V

O(A)

TYPE NUMBER

NAME DESCRIPTION VERSION

TDA8350Q DBS13P plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm) SOT141-6

BLOCK DIAGRAM

V

handbook, full pagewidth

V

P

4

V

P

TDA8350

O(guard)

10

CURRENT

I

drive(pos)

I

drive(neg)

I

I(set)

I

I(corr)

I

I

I(set)

S

I

S

I

T

I

T

V

P

V

O(B)

3

5

11

MBC229-1

V

I(fb)

V

O(B)

V

O(sink)

1

2

V

13

12

7

GND

Fig.1 Block diagram.

January 1995 3

Philips Semiconductors Preliminary specification

DC-coupled vertical deflection and
East-West output circuit

PINNING

SYMBOL PIN DESCRIPTION

I

drive(pos)

I

drive(neg)

V

I(fb)

V

P

V

O(B)

n.c. 6 not connected
GND 7 ground
V

FB

V

O(A)

V

O(guard)

V

O(sink)

I

I(corr)

I

I(set)

book, halfpage

1 input power-stage (positive);

includes I

signal bias

I(sb)

2 input power-stage (negative);

includes I

signal bias

I(sb)

3 feedback voltage input
4 supply voltage
5 output voltage B

8 flyback supply voltage

9 output voltage A
10 guard output voltage
11 East-West amplifier driver (sink)

output voltage

12 East-West amplifier input

correction current (negative)

13 East-West amplifier set input

current (positive)

I

drive(pos)

I

drive(neg)

V

V

O(guard)
V

O(sink)

I

V

I(fb)

V

O(B)

n.c.

GND

V

FB

V

O(A)

I(corr)
I

I(set)

1
2
3
4

P

5
6
7

TDA8350

8

9
10
11
12
13

MBC226-1

TDA8350Q

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
(RM) connected in series with the deflection coil provides
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

) connected between the differential input

(R

CON

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 RM. The maximum input differential
voltage is 1.8 V. In the application it is recommended that
V

= 1.5 V (typ). This is recommended because of the

diff

spread of input current and the spread in the value of
R

.

CON

The flyback voltage is determined by an additional supply
voltage VFB. The principle of operating with two supply
voltages (class G) makes it possible to fix the supply
voltage VP optimum for the scan voltage and the second
supply voltage VFB optimum for the flyback voltage. Using
this method, very high efficiency is achieved.

The supply voltage VFB is almost totally available as
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:

• thermal protection

• short-circuit protection of the output pins (pins 5 and 9)

• short-circuit of the output pins to V

A guard circuit V

is provided. The guard circuit is

O(guard)

activated at the following conditions:

• during flyback

• during various short-circuit possibilities at the output

pins

• during open loop

• when the thermal protection is activated.

This signal can be used for blanking the picture tube
screen.

diff

× R

CON=I(coil)

P.

× RM.

Fig.2 Pin configuration.

January 1995 4

An East-West amplifier is also provided. This amplifier is
an inverting amplifier which is current driven with sink
current only capabilities.

Philips Semiconductors Preliminary specification

DC-coupled vertical deflection and

TDA8350Q

East-West output circuit

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

DC supply

V

P

V

FB

Vertical circuit

I

O

V

O(A)

Flyback switch

I

M

East-West amplifier

V

O(sink)

I

O(sink)

Thermal data (in accordance with IEC 747-1)

T

stg

T

amb

T

vj

R

th vj-c

R

th vj-a

t

sc

supply voltage non-operating − 40 V

− 25 V

flyback supply voltage − 50 V

note 1 60 V

output current (peak-to-peak value) note 2 − 3A
output voltage (pin 9) − 52 V

note 1 62 V

peak output current −±1.5 A

output voltage I
output current V

=10µA; note 3 − 40 V

O(sink)

= 2 V; note 3 − 500 mA

O(sink)

storage temperature −65 150 °C
operating ambient temperature −25 +75 °C
virtual junction temperature − 150 °C
resistance vj-case − 4 K/W
resistance vj-ambient in free air − 40 K/W
short-circuiting time note 4 − 1hr

Notes

1. A flyback supply voltage of>50 V up to 60 V is allowed in application. A 220 nF capacitor in series with a 22 Ω resistor
(dependent on I

and the inductance of the coil) has to be connected between pin 7 and ground. The decoupling

O

capacitor of VFB has to be connected between pin 8 and pin 4. This supply voltage line must have a resistance of
33 Ω (see application circuit Fig.5).

2. IO maximum determined by current protection.

3. The operating area is limited by a straight line between the points V
I

= 500 mA.

O(sink)

O(sink)

= 40 V; I

=10µA and V

O(sink)

O(sink)

=2V;

4. Up to Vp=18V.

January 1995 5