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INTEGRATED CIRCUITS
DATA SHEET
TDA8350Q
DC-coupled vertical deflection and
East-West output circuit
Preliminary specification
Supersedes data of September 1991
File under Integrated Circuits, IC02
January 1995
Philips Semiconductors

Philips Semiconductors
DC-coupled vertical deflection and
East-West output circuit
Preliminary specification
TDA8350Q
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 VP

• High EMC immunity due to common mode inputs

• Temperature (thermal) protection

• East-West output stage with one single conversion

resistor.
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.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
DC supply

VP supply voltage

IP quiescent current

9 − 25 V

− 30 − mA

Vertical circuit

IO(p-p)

Idiff(p-p)

Vdiff(p-p)

output current (peak-to-peak value)
differential input current
(peak-to-peak value)
differential input voltage
(peak-to-peak value)

−−3A

− 600 − µA

− 1.5 1.8 V

Flyback switch

IM peak output current

VFB flyback supply voltage

note 1

− − ±1.5 A

− − 50 V

− − 60 V

East-West amplifier

IO(sink)

VO(sink)

Ibias

output current (sink only)
peak output voltage
input bias current

IO(sink) = 10 µA

− − 500 mA

− − 40 V

− − 1 µA

Thermal data (in accordance with IEC 747-1)

Tstg

Tamb

Tvj

storage temperature
operating ambient temperature
virtual junction temperature

−65 −

−25 −

−−

150 °C

+75 °C

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

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
DC-coupled vertical deflection and
East-West output circuit
Preliminary specification
TDA8350Q
ORDERING INFORMATION
TYPE NUMBER
TDA8350Q
PACKAGE
NAME
DESCRIPTION
DBS13P plastic DIL-bent-SIL power package; 13 leads (lead length 12 mm)
VERSION
SOT141-6
BLOCK DIAGRAM
handbook, full pagewidth
VP VO(guard)
VFB
4 10
VP
8
CURRENT
SOURCE
TDA8350
Idrive(pos)
1

I drive(neg)

2
V
IS
IS

I I(set)

13

I I(corr)

12

I I(set)

7
GND
VP
VO(A)
9
VO(A)
IT
IT
VP
3 VI(fb)
5
VO(B)
VO(B)
11 VO(sink)
MBC229-1
Fig.1 Block diagram.
January 1995
3