Datasheet TDA8143 Datasheet (SGS Thomson Microelectronics)

HORIZONTAL DEFLECTION POWER DRIVER

.

CONTROLLED DRIVING OF THE POWER
TRANSISTOR DURING TURN ON AND OFF
PHASE FOR MINIMUM POWER DISSIPA­TION AND HIGH RELIAB I LITY

.

HIGH SOURCE AND SINK CURRENT CAPA­BILITY

.

DISCHARGE CURRENT DERIVED FROM
PEAK CHARGE CURRENT

.

CONTROLLED DIS CHARGE TIMING

.

DISABLE FUNCTION FOR SUPPLY UNDER
VOLTAGE AND NONSYNCHRONOUS OP­ERATION

.

PROTECTION FUNCTION WITH HYSTERE­SIS FOR OVERTEMPERATURE

.

OUTPUT DIODE CLAMPING

.

LIMITING OF THE COLLEC TOR PEAK CUR­RENT OF THE DEFLECTION POWER TRAN­SISTOR DURI NG TURN ON PERI O D

.

SPECIAL REMOTE FUNCTION WITH DELAY
TIME TO SWITCH THE OUTPUT ON

TDA8143

SIP9

(Plastic Package)

ORDER CODE : TDA8143

DESCRIPTION

The TDA8143 is a monolithic integrated circuit
designed to drive the horizontal deflection power
tran-sistor.

The current source characteristic of this device is
adapted to the non-linear current gain behaviour of
the power transistor providing a minimum power
dissipation. The TDA8143 is internally protected
against short circuits and thermal overload.

PIN CONNECTIONS

9
8
7
6
5
4
3
2
1

September 1993

PROTECTION AND REMOTE STANDBY INPUT
CONTROL INPUT
SPECIAL REMOTE STANDBY
C
GROUND
SENSE-IN
V+
OUTPUT
GROUND

T

CC

8143-01.EPS

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TDA8143

PIN FUN CTI O NS

Pin Name Function

1 Power Ground Common Ground
2 Ouptut Device Output
3V

CC

4 Sense Input Input voltage that determines output current.
5 Sense GND Reference Ground for Input Voltage at SENSE INPUT.
6C

EXT

7 Special Remote/Standby Low level at this input sets the device after a delay time t
8 Control Input High level at this input switches the BU508 off, low level switches the BU508 on.

9 Protection and Remote

Standby Input

BLOCK DIAG RAM

Supply Voltage

Capacitor between this terminal and SENSE GROUND determines the current
slope dIO/dt during OFF phase.

in the standby mode

independent from CONTROL INPUT (2nd priority).

dr

A high level at this input switches the BU508 off independent from all other inputs
(1st priority).

8143-01.TBL

V

H

BU508

R

0.15

S

Ω

TDA8143

SPECIAL
REMOTE

STANDBY

7

8

CONTROL

IN

SYNC. DET.

THERMAL

PROTECTION

&

PROT ECTION AND
REMOTE ST AN BY INPUT

9

6

C
1nF

VCC+

100k

Ω

3

I

B1

V

S

2

OUT

4

SENSE

I

B2

V

C

1

IN

5

GND

27

220µF

4.7

22nF

Ω

10µH

Ω

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

I

d

P

tot

, T

T

stg

T

oper

DC Supply Voltage 18 V
Output Current Internally Limited
Power Dissipation Internally Limited
Storage and Junction Temperature – 40, + 150 °C

j

Operating Temperature 0, + 70 °C

8143-02.EPS

8143-02.TBL

THERMAL DATA

Symbol Parameter Value Unit

Thermal Resistance Junction-ambient Max. 70 °C/W
Thermal Resistance Junction–case Max. 10 °C/W

2/9

R
R

th (j–a)
th (j–c)

8143-03.TBL

TDA8143

ELECTRICAL CHARACTERISTICS (VCC = 12 V, T

= 25oC unless otherwise specified)

amb

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

CC

I

Q

I

p0

I

n0

I

o0

Supply Voltage 7 18 V
Quiescent Current All Inputs Open 10 15 25 mA
Positive Output Current (source) 1.5 A
Negative Output Current (sink) 2 A
Positive quiescent output current forcing

the output to 6 V and the sense input to

Remote Input1
Remote Input0

120

50

150

80

200
100

ground output externally forced to 6 V.

G

ON

G

OFF

G

REMOTE

I

5

R

INS

I

INS

R

SYN

V

THS

V

SYN

V

THA

I

INA

V

THB

I

INB

t

dr

t

don

V

CC–VOUT

V

CC ON

V

CC OFF

V

S limit

Notes : 1. GON is measured with V4 varying from 150mV to 350mV (Pin 6 is grounded)

Transconductance ON Phase (1) See Figure 1 1.8 2.0 2.2 A/V
Transconductance OFF Phase (2) See Figure 1 1.8 2.0 2.2 A/V
Transconductance Standby Mode Remote Input0 0.675 0.75 0.825 A/V
Current Source Pin 6 V7 = 500 mV 135 165 200 µA
Sense Input Resistance VS > 0

< 0

V

S

0.7

0.35

1

0.5

1.3

0.7

Sense Input Bias Current VS = 0

Remote Input = 1 – 200 – 300 – 400 µA

Synchronous Detection Input Resistance V

Threshold Voltage of the Synchronous

V

SYN
SYN

< 7 V

> 7 V

30

7

60
10

150

15

1 1.8 2.8 V

Detection Input
SYNC DETECT Input Voltage 30 V
Threshold Voltage of Control Input 1.5 2 2.5 V
Pull up Current of Control Input 0 < VIN < V

VIN > V

THA

THA

+ 0.5 V

– 50

– 1

– 1000– 160

+ 1
Threshold Voltage Remote Input 1.5 2 2.5 V
Pull-up Current of the Remote Input 0 < VIN < V

VIN > V

THB

THB

+ 0.5 V

– 50

– 1

– 1000– 160

+ 1
Remote Delay Time (3) 190 250 300 µs
On Delay Time 3 4.5 µs
Output Voltage Drop for Ip0 = 1 A 2 2.8 3 V
Supply Voltage for Device "ON" I0 ≥ 0 5.8 6.4 7.0 V
Supply Voltage for Device "OFF"

(output internally switched to ground)

5.6 V

CC ON

– 0.2 V

6.8 V

Sense Limit Voltage (4) 0.8 0.9 1 V

2. G

is measured with V6 varying from 150mV to 350mV (Pin 4 is grounded)

OFF

3. When the remote input goes from HIGH to LOW the BU508 is switched off and it remains in this condition for the time tdr.

4. The sense input voltage V
the storage time tS of the BU508 limiting of VS leads to a reduced base current of the BU508 and the output current I0 is going to
the positive quiescent current Io0.

is internally limited and results in a limited positive output current Ip0 = g. VS limit. Note that due to

S

mA
mA

kΩ
kΩ

kΩ
kΩ

µA
µA

µA
µA

8143-04.TBL

TRUTH TABLE

Logics Inputs

Control Input Remote/Standby

0

Floating or 1

Floating or 1
Floating or 1

X0 I

X0 I

Note : 5. IO < 0 means that the sink current flows into the output to ground.

> 0

I

0

I0 < 0 (5)

< 0 (5)

0

0 < t < t

> 0

0

t > t

dr

dr

Output I

BU508 ON
BU508 OFF

BU508 OFF

BU508 ON

0

Mode

Normal Function

Remote/Standby

Function

8143-05.TBL

3/9

TDA8143

Figure 1 :

GGor

ON OFF

G

ON

V

Pin3

(A/V) (A/V)

and

|

G

|

OFF

V

Pin5

2.2

2.1

2.0

1.9

1.8
VV(mV) or

Pin3 Pin5

(mV)

1.7

0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750

Figure 2 : Large Screen Application

+12V

STANDBY

D1

C

a

93

8

TDA8143

R

f

R

O

2

C

O

4

R

b

L

O

OUT

BU508

R

S

8143-03.EPS

C

b

5

1

6

C

S

COMPONE N TS LIS T FOR T YP ICAL APPLICA T ION

CRT 22"/26" 100° 14"/20" 90° CRT 22"/26" 100° 14"/20" 90°

4/9

C

a

R

o

C

o

L

o

47 µF

27 Ω 2W

220 µF

10 µH

47 µF

27 Ω 1 W

220 µF

10 µH

R

b

C

b

R

s

C

s

4.7 Ω
47 nF

0.15 Ω
1 nF

4.7 Ω

47 nF

0.1 Ω
1 nF

8143-04.EPS

8143-06.TBL

TDA8143

APPLICATION INFORMATION

The conventional deflection system is shown in
Figure 3. The driving circuit consists of a bipolar
power transistor driven by a transformer and a
medium power element plus some passive compo­nents.

During the active deflection phase the collector
current of the power transistor is linearly rising and
the driving circuitr y must be adapted to the required
base current in order to ens ure the power transistor
saturation.

system.
The new approach, using the TDA8143, over-

comes these restrictions by means of a feedback
principle.

As shown in Figure 4, at each instant of time the
ideal base current of the power transistor results
from its collector current divided by such current
gain which ensure the saturation ; thus the r equired
base current I
back transconductance amplifier g
the deflection current across the resistor R
emitter of the power transistor and delivers :

According to the limited components number the
typical approach of the present TVs provides only
a rough approximation of this objective ; in Figure 4
we give a comparison between the typical real base

The transconductance must only fulfill the condi­tion :

current and the ideal base current waveform and
the collector waveform.

The marked area represents a useless base cur­rent which gives an additional power dis sipation on
the power transistor.

Furthermore during the tur n-ON and turn-OFF tran­sient phase of the chassis the power transistor is
extremely stressed when the convenctional net­work cannot guarantee the saturation ; for this
reason, generally, the driving circuit must be care­fully designed and is different for each deflection

where β is the minimum curr ent gain of the transitor.
This method always ensures the correct base cur­rent and acts time independent on principle.

For the turn-OFF, the base of the power transistor
must be discharged by a quas i linear time decreas­ing current as given in Figure 5.

Conventional driver systems inherently result into
a stable condition with a constant peak current
magnitude.

Figure 3 : Conventional Horizontal Deflection System for TVs

can be easily generated by a feed-

b

which senses

m

at the

s

= RS • gm • I

I

b

1

1 + βmin

⋅

1

R

< gm <

S

e

1

R

S

VCC+

V

DRIVING CIRCUIT

ICI

D

I

B

IN

HORIZONTAL
TRANSFORMER

YOKE

DEFLECTION CIRCUIT

8143-05.EPS

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TDA8143

Figure 4 : Waveforms of Collector and

Base Current

I

C

Off Phase On Phase Off Phase

Real Base Current
Ideal Base Current

I

BIAS

I

C

Base Bias Current

I

D

t

S

Figure 5

I

0

t

don

I

0

t

t

ON PHASE

This is due to the constant base charge in the
turn-ON phase independent from the collector cur­rent ; hence a high peak current results into a low
storage time of the transistor because the excess
base charge is a minimum and vice versa. In the
active deflection the required function, high peak
current-fast switch- OFF and low peak current-slow
switch-OFF, is obtained by a controlled base dis­charge current for the power transistor ; the nega­tive slope of this ramp is proportional to the actual
sensed current.

As a result, the active driving system even im­proves the s harpness of vertical lines on the scr een
compared with the traditional solution due to the
increased stability factor of the loop represented as
the variation of the st orage time versus the collector
peak current.

8143-06.EPS

I

dI

S0

0

=

t

dt

I

p0

I

n0

S

I

S0

OFF PHASE

t

CONTROL
INPUT

CIRCUIT DESCRIPTION

Figure 6 shows the block diagram of the TDA8143,
the circuit consists of an input transconductance
amplifier composed by Q1, Q2, Q3 and Q4.

The symmetr ical out put c urrent is f ed into the load
resistor R1 and R2 ; the two amplifiers V1 and V2
realize a floating voltage to current converter which
can drive 1.2A sink current and 2A source current
for a wide common output range.

So, the overall transconductance results into :

g

m

R1 + R2

=

R3

1

⋅

R5

A current source I1 generates a drop of 70mV
across the resistor R4 which provides an output
bias current of 140mA ; the control input determines
the turn ON/OFF function.

In the ON phase, Q5 shorts the external capacitor

t

S

t

. Within the input volt age range 0 < Vin < 750mV

C

t

the element realizes the transconductance func­tion ; lower voltages are clamped by the D1/Q6
configuration.

For input voltages higher than 750mV, Q 7 limits th e
maximum output current at 1.5A peak.

In the turn-OFF mode, C
controlled source I

will be charged by the

t

which is proportional to the

2

input voltage, by this way, the output current de­creases quasi linearly and the system stability is
reached.

During the flyback phase, the IC is enabled v ia t he
sync. detector input ; this function with the limited
sink and source curre nt together with the undervol­tage turn-OFF and a chip temperature sensor en­sure a complete protection of the IC.

8143-07.EPS

6/9

Figure 6 : Block Diagram of the Integrated Horizontal Driver

PROTECTION

AND REMOTE

STANDBY INPUT

CONTROL

SPECIAL
REMOTE

STANDBY

INPUT

9

VOLTAGE
CONTROL
V < 7V

OVE R TEMP .
PROT ECTI ON
T < 150˚C

j

8

7

Q9 V1

C

&

&

TRANSCONDUCTANCE

I

1

Q8

AMPLIFIER

R6

R2R1

I

2

Q2

Q5

Q4Q3

R3

Q1

INPUT

TDA8143

+

3

V

CC

Q10

Q11

R5

I

B

2

OUTPUT

SENSE

4

INPUT

V

IN

V2

Q7Q6

D1

R4

D2

V = 750mV

REF

6 15

C

EXT

C

T

In Figure 7 is shown the application diagram of the
TDA8143, the few external component and the
automatic handling possibility ensures a lower ap­plication cost versus the conventional approach
shown in Figure 3.

In Figure 8 is shown the currents and voltage
waveforms of the driver circuit of Figur e 7 as t o be
seen, the driving charge I

⋅ ton has been reduced

b

at minimum.

POWER
GROUND

SENSE
GROUND

The power dissipation on this application co ndition
is about 1.3W.

The presence of thermal shut-down circuit means
that the heatsink can have a s maller factor of safety
compared with that of a conventional circuit.

If for any reason, the junction temperature in­creases up to 150oC, the thermal shut-down simply
switches off the device.

8143-08.EPS

7/9

TDA8143

Figure 7 : Integrated Horizontal Driver

+V

CC

3

TDA8143

V

8

i

1

100µF

6

5

1nF

HORIZONTAL

R

I

CID

220µF

9

2

4

4.7Ω

47nF

2W

27

I

B

Ω

0.15Ω

TRANSFORMER

YOKE

DEFLECTION CIRCUIT

DRIVING CIRCUIT

Figure 8 : Signal Diagrams of the Driver Circuits

8143-09.EPS

8143-10.TIF

8143-11.TIF

8/9

PACKAGE MECHANICAL DATA

9 PINS - PLASTIC SIP

TDA8143

C

c2

A

c1

Dimensions

L2

D

L1

19

a1
L

e3

N

M

b1

b3

e

B

L3

d1

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

A 7.1 0.280

a1 2.7 3 0.106 0.118

B 24.8 0.976
b1 0.5 0.020
b3 0.85 1.6 0.033 0.0 63

C 3.3 0.130
c1 0.43 0.017
c2 1.32 0.052

D 21.2 0.835
d1 14.5 0.571

e 2.54 0.100
e3 20.32 0.800

L 3.1 0.122
L1 3 0.118
L2 17.6 0.693
L3 0.25 0.010

M 3.2 0.126
N 1 0.039

Information furnished i s believed to be accurate and rel iabl e. However, S GS-THOMSON Microel ectroni cs assumes no responsibil ity
for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.

PM-SIP9.EPS

SIP9.TBL

© 1994 SGS-THOMSON Microelec tronics - All Rights Reserved

2

Purchase of I

2

C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to

I

Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco

The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.

C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips

2

C Standard Specifications as defined by Philips.

the I

SGS-THOMSON Microelectronics GROUP OF COMPANIES

9/9