SGS Thomson Microelectronics TEA2164 Datasheet

SWITCH MODE POWER SUPPLY PRIMARYCIRCUIT

.

POSITIVE AND NEGATIVE OUTPUT CUR­RENTUP TO 1.2AAND – 1.7A

.

A TWO LEVEL COLLECTOR CURRENT LIMI­TATION

.

COMPLETETURN OFF AFTERLONG DURA­TIONOVERLOADS

.

UNDERANDOVER VOLTAGELOCK-OUT

.

SOFT START BY PROGRESSIVE CURRENT
LIMITATION

.

DOUBLEPULSESUPPRESSION

.

BURST MODE OPERATION UNDER STAND­BY CONDITIONS

DESCRIPTION

In amasterslave architecture,theTEA2164control
IC achieves the slave function.Primarilydesigned
for TV receivers and monitors applications, this
circuitprovidesaneasy synchronizationand smart
solutionfor low powerstand by operation.

Located at the primary side the TEA2164 Control
IC ensures:

- the powersupply start-up

- the power supply control under stand-by condi­tions

- the process of the regulation signalssent by the
mastercircuitlocated at the secondaryside

- directbasedriveofthebipolarswitchingtransistor

- the protection of the transistor and the power
supplyunder abnormalconditions.

For more details, refer toapplicationnote AN409.

TEA2164

POWERDIP16

(Plastic Package)

ORDER CODE : TEA2164

PINCONNECTIONS

LONG CAPACITOR OVERLOAD CAPACITOR

OSCILLATOR TIMING RESISTOR

OSCILLATOR TIMING CAPACITOR

December 1992

GROUND

I COPY

SUBSTRATE
SUBSTRATE

PULSE INPUT

V SUPPLY VOLTAGE

1
2
3
4
5
6
7
8

16

CC

OUTPUT STAGE POSITIVE SUPPLY VOLTAGE

15

OUTPUT (BASE CURRENT)

14

SUBSTRATE

13

SUBSTRATE

12

I SENSE

11

C (max.)

LOW FREQUENCY OSCILLATOR CAPACITOR

10

FEEDBACK INPUT IS BURST MODE

9

2164-01.EPS

1/15

TEA2164

BLOCK DIAGRAM

2/15

2164-02.EPS

TEA2164

Figure 1 : SimplifiedApplication Diagram

ABSOLUTEMAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

V+ Positive Power Supply of the Output Stage V15-V1 18 V
V– Negative Power Supply V4, 5, 12, 13-V1 – 5 V

-V–

V

CC

V+ - V–

I

out+

I

out–

T

T

stag

Positive Power Supply V16-V1 18 V

Total Power Supply V16-V4, 5, 12, 13 or V15-V4, 5, 12, 13 20 V

Positive Output Current 1.5 A
Negative Output Current 2 A
Operating Junction Temperature 150 °

j

Storage Temperature Range –40, + 150 °

2164-03.EPS

C
C

2164-01.TBL

THERMALDATA

Symbol Parameter Value Unit

R

th(j-c)

Junction Case Thermal Resistance 11 °

MAXIMUMPOWER DISSIPATION

2164-04.EPS

C/W

3/15

2164-02.TBL

TEA2164

RECOMMANDED OPERATING CONDITIONS

Symbol Parameter Min. Typ. Max. Unit

V

CC

V– Negative Power Supply (absolute value) (note 1) 0 5 V

V

– V– Total Power Supply 18 V

CC

I

out+

I

out–

Fsw Switching Frequency 50 khz

Ro Oscillator Resistor Range 30 150
Co Oscillator Capacitor Range 470 2700 pF

C1 StartingOscillator Capacitor Range 0.1 4.7 µ
C2 Repetitive Overload Protection Capacitor 1 22

V

in

T

oper

Positive Power Supply 10 14 V

Positive Output Current 1.2 A
Negative Output Current 1.7 A

 Input Pulses Amplitude (peak) (derivated pulses - time constant = 1 µs)

0.5 1 V

Operating Ambiant Temperature – 20 70 °

-

V

CC

I>0

14

<0

B

<0

I

B

1312

TEA2164

5

4

I

I

B
I

14

1

capacitive

<0

B

coupling

12 13

TEA2164

45 1

-

V

CC

I

B

kΩ

µF

F

C

2164-03.TBL

2164-05.EPS

ELECTRICAL OPERATING CHARACTERISTICS

=25oC, VCC=10V, V

T

amb

= 0V, potentialsreferencedto ground (Pin 1)

CC-

(unlessotherwise specified)

Symbol Parameter Min. Typ. Max. Unit

POWER SUPPLY

(start) Starting Voltage (VCCincreasing) 8 9 9.6 V

V

CC

V

(stop) Stopping Voltage (VCCdecreasing) 5 6.2 7.4 V

CC

∆V

CC

V

ccmax

I

ccstart

CURRENT LIMITATION AND PROTECTION (pin 11)

VCM1 Pulse by Pulse Current Limitation Threshold 720 840 970 mV
VCM2 Current Monitoring 2nd Threshold 1200 1350 1500 mV

∆VCM ∆VCM = VCM2 – VCM1

REPETITIVEOVERCURRENT PROTECTION

VCM3 Repetitive OvercurrentThreshold (pin 11) 700 900 1100 mV

VCM3-VCM1 (VCM3-VCM1) – 20 50 130 mV

VC2 Lock-out Voltage on Pin 3 2.4 3 3.6 V

I3 disch Capacitor C2 Discharge Current (synchronizedmode) 10 20 30 µ

I3 ch. Capacitor C2 Charge Current 50 80 110 µ

OSCILLATOR, MAX DUTY CYCLE, SYNCHRONIZATION

T

o

T

on(max)

Hysteresis (VCCstart – VCCstop) 2 2.8 3.5 V
Overvoltage Lock-out 14.8 15.5 16.2 V
Starting Positive Supply Current 0.5 0.8 1.5 mA

300 500 700 mV

Oscillator Initial Accuracy RT = 50 K, CT = 1 nF 19.3 21 22.7
Maximum Duty Cycle (T

= 1.05 To)607085%

syn

A
A

µs

2164-04.TBL

4/15

ELECTRICAL OPERATINGCHARACTERISTICS (continued)

Symbol Parameter Min. Typ. Max. Unit

OSCILLATOR, MAX DUTY CYCLE, SYNCHRONIZATION (continued)

T

syn

T

O

OUTPUT STAGE

I

14/I2

I

BON

VERY LOW FREQUENCY OSCILLATOR

Synchronization Window 1.0 1.5

IcCopy CurrentGain 1000
Base Current Starting Pulse 300 mA

Burst Duty Cycle 13 %

TEA2164

2164-05.TBL

I. FIELD OF APPLICATION

The TEA2164 control circuit has been designed
primarily for discontinuousmode flybackbuilt with
a master-slave architecture, whatever the field of
application.
Butdue to its capabilityto synchronizethe transis­tor switching-off with an external signal (line fly­back)and dueto an adaptedburst-modeoperation
for a low power stand-by operation, the TEA2164
offers a smart solution for monitors and TV sets
applications.
Powersupply main features:

- maximumoutput power 140W (transistorforced
gain : 3.5)

Figure 2 : MasterSlave PowerSupplyArchitecture

R

MAINS
INPUT

P

C

V

CC

2

- stand-bymode output power (1W ≤ Psb ≤ 6W ;
efficiency > 50%)

- operatingfrequencyup to 50kHz

- power-switch : bipolar transistor

Adaptedmaster-circuit :
Monitorapplication → TEA5170
Standard TV application → TEA2028B

TEA2029C
TEA2128
TEA5170

Digital TV application → TEA5170
(TEA2028B,TEA2029Cand TEA2128 are deflec-

tion processorswith built-in PWM generator).

Muting
Control

Remote

Stand-by

Remote

Stand-by

P

1

Synchronization

AUDIO

OUTPUT

STAGE

SCANNING

DEVICE

VOLTAGE

REGULATOR

TEA2164

P : Output voltage adjustement in normal mode

1

P : Output voltage adjustement in stand-by

2

TEA5170

PWM

µP

V

CC

INFRA-RED

RECEIVER

Small signal primary ground
Power primary ground
Secondary ground (isolated from mains)

2164-06.EPS

5/15

TEA2164

II. GENERALDESCRIPTION

In a masterslave architecture,the TEA2164 Con­trol IC, located at the primary side of an off line
powersupplyachievestheslavefunction;whereas

Figure 3 : SystemDescription Waveforms

the mastercircuitis locatedat the secondaryside.
The linkbetweenboth circuitsis realizedbyasmall
pulse transformer(Figure 3).

6/15

2164-07.EPS

TEA2164

In the operation of the master-slave architecture,
four majors casesmustbe considered :

- normaloperating

- stand-bymode

- powersupplystart-up

- abnormalconditions : off load,short circuit,...
II.1.Normal Operating (master slave mode)

In this configuration,themastercircuit generatesa
pulsewidthmodulatedsignalissuedfromthemoni­toring of the output voltage which needs the best
accuracy(inTVapplications:thehorizontaldeflec­tionstagesupplyvoltage).Themastercircuitpower
supplycan be suppliedby another output.

The PWM signalare sent towards the primary side
through small differentiating transformer. For the
TEA2164 positive pulses are transistor switching­on commands; and negative pulsesare transistor
switching-offcommands(Figure 4). In this configu­ration,only by synchronizingthe masteroscillator,
the switchingtransistor may be synchronizedwith
an externalsignal.

II.2.Stand-byMode

In this configuration the master circuit no longer
Figure 4 : MasterSlave Mode Waveforms

sends PWM signals, the structure is not synchro­nized ; and the TEA2164 operates in burst mode.
The averagepower consumptionat the secondary
side may be very low 1W ≤ P ≤ 6W (as it is
consumedin TV set during stand by).

By action on the maximum duty cycle control, a
primary loop maintains a semi-regulation of the
outputvoltages.Voltageonfeed-backisappliedon
Pin 9.

Burstperiodis externallyprogrammedbycapacitor
C1.

II.3.Power Supply Start-up

After the mains have been switched-on, the V

CC

storage capacitor of the TEA2164 is charged
through a high value resistor connected to the
rectifiedhigh voltage.When VccreachesV

CC

start
threshold(9V typ), theTEA2164startsoperatingin
burst mode. Sinceavailable outputpower islow in
burst mode the output power consumption must
remain low before complete setting-up of output
voltage. In TV application it can be achieved by
maintaining the TV in stand-by mode duringstart­up (Figure 6).

SLAVE

CIRCUIT

Synchro.

MASTER
CIRCUIT

Sync.
Pulses

PWM
Signal

Pulse
Input

Base
Current

2164-08.EPS

7/15

TEA2164

Figure 5 : BurstMode Waveforms

Figure 6 : PowerSupplyStart-up

2164-09.EPS

Tch ≈ 1s (typ)
T1 ≈ 0.3s (typ)

T

start-up

= Tch + T1

T1 :necessary time for voltagesetting-up

d) Abnormalconditions: safetyfunctions
OvervoltageProtection

When V

exceeds VCCmax, an internal flip-flop

CC

stops output conduction signals. The circuit will
start again after the capacitor C1 discharge ; it
means : after loss of synchronizationor after Vcc
stopcrossing (Figure7).

In flyback converters, this function protects the
powersupply against outputvoltagerunaway.

Under Voltage Lock-out

The TEA2164 controlcircuitstops operatingwhen

goes under VCCstop.

V

CC

8/15

Power Limitation,Current Protection, Long
Duration OverloadProtection

- Output power limitation : by a pulse by pulse

collectorcurrentlimitation the TEA2164 limits the
maximum output power. V

isthe correspond-

CM1

ing voltagethreshold,its detection is memorized
up to the next period.

- Currentprotection(transistorprotection)

Under particular conditions a hard overload or
short circuit may induce a fluxrunawayin spiteof
the currentlimitation (V

CM1

).
The TEA2164 control circuit features a second
current protection, V

. When this thresholdis

CM2

reached an internal flip-flop memorizes it and

2164-10.EPS

TEA2164

output conduction signals are inhibited. The cir­cuitwill sendbasedrivesagainaftercapacitorC1
discharge(Figure7).

- Longdurationoverloadprotection : (Figure 8)
An overload is detectedwhen thesense-voltage
on Pin 11 reachesV

before a negativepulse

CM3

hasbeenappliedto Pin 6. In thiscasethe capaci­tor C2 (connectedto Pin3) is charged with I
up to theendof the period and discharged with I
disch until a next V

detector. By this way in

CM3

ch

3

3

case of long duration overload, the capacitor

Figure 7 : OvervoltagesLock-out

Figure 8 : LongDuration Overload Monitoring Circuit

keeps charging at each period and its voltage
encreasesgradually. When the voltage on Pin3
exceeds V

, the TEA2164 control circuit stops

C2

sending base drives and memorizes this event.
No restart is allowed as long as V
than V

andVCChigherthan 4.8V.

C2

pin 3

is higher

* Remark:

- The harder is the overload the faster is the pro­tection

- The capacitorkeeps chargingbetween two burst
after V

CM2

detection.

2164-11.EPS

Figure 9 : LongDuration Overload Detection

2164-11.EPS

2164-13.EPS

9/15

TEA2164

Figure 10 : RepetitiveOver-current Protection

III. SWITCHINGOSCILLATOR AND SYNCHRONIZATION
III.1. Switchingoscillator

Whenthe TEA2164controlcircuitoperatesin burst
mode, the switching frequencyis fixed by the free
frequency oscillator. The period is determined by
two external componentsC

andRO.

O

III.2. Synchronization

Whenthe master-circuitstarts to send pulsesboth
Figure 11 : Free Frequency Running

oscillators are not synchonuous. In order to avoid
any erratic conductionof the power transistor,the
firstsynchronizationpulse will arrive simultanously
with thesawtoothreturn of the TEA2164oscillator.

Toget synchronizationthe free frequency must be
higher than the synchronizationfrequency.

T

O<Tsync.

< 1.50 T

2164-14.EPS

O

Figure 12 : SynchronizationPulse Shaperand Synchronization

10/15

2164-15.EPS

2164-16.EPS

Operationafter synchronization

TEA2164

(1) NORMAL OPERATION

∆T :synchronization window

Operationafter synchronization

(3) ERRATIC POSITIVE PULSES

P1 and P2 are masked due to the synchronization window

Cases (2) (3) (4) donot occur in normal operating.

IV - MAXIMUM DUTY CYCLE LIMITATION

Burstmode :Themaximum dutycycleiscontrolled
by the voltage on Pin 9 (Figure13).

Synchronizedmode : Normallythe maximum duty
cycle is set by the master circuit. Oowever the
maximum conducting time will never exceed the
value given by the comparison of the oscillator
wave-formwith the 2.5Vinternal threshold.

V - OUTPUTSTAGE

TEA2164output stage has beendesignedto drive
switchingbipolar transistor.

- Eachbase drive beginswitha positivepulseI

BON

(2) NEGATIVE PULSE MISSING

Transistor turn-off is ensured by VCM1 current limitation cross­ing or byan internaltON (max.) limitation set by a 2.5V threshold

(4) Fsynchro < 0.65 Fo

Signal S1 triggers burst oscillator capacitor discharge.
The TEA2164 restarts in burst-mode

thatrealizesan efficienttransistorturn-on.

- After the starting pulse I

, the base currentis

BON

proportionalto the collector current. The current
gain is easily fixed by a resistorR (Figure14).

- A fast and safetransistor turn-off is realized by a
fastpositivebase currentcut-off and by applying
a negativebase drive which draws stored carri­ers.A typical 0.7sdelaypreventsfromcross-con­ductionof positiveand negative outputstages.

Remark : In order to reducepower dissipationon
the positiveoutput stage with the lowgain transis­tors,forhighbasecurrentsthepositiveoutputstage
operatesin saturated mode (Figure 15). This can
be achievedby using a resistorbetween V

CC

and

V+.

2164-17.EPS / 2164-18.EPS

2164-19.EPS

11/15

TEA2164

Figure 13 : MaximumDuty Cycle Limitation

Figure 14 : OutputStage Architectureand Base Drive

2164-20.EPS

V

4-5-12-13

V

I

14

B

R

S

R

B

I

C

The energy of the starting burst must be high
enough to ensure start-up, then the capacitor C1
must be higher in these applicationsthan on TV
application(typ. : 1µF).

16 15

V

CC

CURRENT

MIRROR

Virtual

Ground

2

I

COPY

VI - MONITOR APPLICATIONS

In most of monitor applications, the power supply
must start-up under full load conditions and the
stand-by mode is no longer useful.

Figure 15 : PowerSupply Start-up andNormal Operation

I

Cmax

I

I

B

C

I

BON

I

C

≅ GF

I

B

I

C

GF = =

I

B

R

S

R

B

1000 x R

t

t

V

CM1

=

I

Cmax

S

2164-21.EPS

12/15

2164-22.EPS

COMPLETE APPLICATION DIAGRAM(SMPS + DEFLECTION) (with stand-by function)

+24V

+200V

Ω

Frame

Adjust

60

ESM

4.7µF

BA157

740

Ω

220

220Ω

Ω

220

100Ω BA159

4

18

1N4444

390

Amplitude

33Ω

820Ω

6

+24V

Ω 4.7Ω

220

220Ω

6.8kΩ

3.3kΩ

3.3kΩ

6.8kΩ

100nF

Ω

1k

820Ω

2.7MΩ

3

1

2

200V

Ω1kΩ

82k

Adjust

FramePhase

E/W

470nF

Ω

220k

Ω

2.2k

5

10kΩ

28

11

SUPER

SANDCASTLE

LINE

4.7nF

100nF

TEA2029C

220nF

100nF

VIDEO

15 27 26 25 12

7

22

19

1.5nF

220Ω

15nF4.7

3.9kΩ

503

kHz

F

µ

F

µ

10

24

20

1N4148

MUTEOUT

8.2kΩ

330Ω

15kΩ

5.6kΩ

5.6kΩ

AGC

CC

V

0.27Ω

100Ω

Ω

330

Ω

1nF

PrimaryGround(connectedtomains)

Secondaryground(isolatedfrom mains)

OREGA

FUSE1.6A

EHT

TRANSFORMER

220pF

150kΩ

33kΩ

+135V / 0.6A

100µF

BY218

G.4173.04

313

2x 47µF

4 x 1N4007

AC

220V

MAINSINPUT

220pF

SMPS

100kΩ

(385V)

300kΩ

OutputVoltage

2N1711

27Ω

BY218

20

(2W)

LINEFLYBACK

100kΩ

1kΩ1kΩ

Adjust

Ω

680

1000µF

19

6

Ω

2.2

BA157

V

13V

9

FRAME

YOKE

120mH

1nF

LINE

YOKE

500µH

0.47µF

390Ω

47nF

1kΩ

10

21

1kΩ

98

1.5kΩ

CC

F

µ

220

22nF

14132316

3.32kΩ (1%)

3.3nF

100nF

VCR

Switch

22nF

+25V

Ω

10k

470µF

CC

V

17

470kΩ

Ω

1.8k

Adjust

150pF

HorizontalPhase

BY218

21

22

CC

V

470Ω

7

1

2

2.2nF

BU508A

Ω

2.2

47µF

BA157

3 x 1N404

10Ω

2µH

220µF

16

15

6.8Ω

1

470kΩ

45

9

12kΩ

7

110kΩ

14

6

2

1110

3

TEA2164

13

12

8

1.2nF

2.2µF

CORRECTION

OUTPUT

FLYBACK

INPUT

&

50/60Hz

IDENTIFICATION

PULSE

TEA2164

2164-23.EPS

13/15

TEA2164

STAND-ALONE 32kHz POWER SUPPLY ELECTRICALDIAGRAM

135V

Sync.

Input

BY218-600

13

G4453-02

3

P1

100µF

100kΩ

(250V)

PLR811

2.2kΩ

100kΩ

7.5V

Stand-by

Control

Ω

47nF

75k

TEA5170

16V

81

7

560

3

470Ω

(8W)

BA159

pF

2.7nF

1kV

10kΩ

560

pF

65

4

2

BC550C

25V

1000µF

22

(40V)

BY218-100

21

10µF

SGSF344

1000µF

14

9

(25V)

BY218-100

7 17

470µF

(25V)

20

19

6

150pF

1N4148

270Ω

6.8kΩ100kΩ

Pulse

Transformer

Ω

100

14/15

4 x 1N4007

20%= 220

AC

V

IN

V

150µF

120kΩ

(385V)

(2W)

68kΩ

1nF

BA157

4.7Ω (2W)

P2

47µF

220µF

25V

Ω BZX85C-3V0

18

2.2µF

5.6Ω

(1W)

14

15

12 13 16

22kΩ

5

4

2

11

3

1

TEA2164

6

µF

4.7

1N4148

330

16V

0.24Ω(1W)

Ω

330

Ω

1nF

560pF2%

9

10

100nF

8

7

1%

100kΩ

: 120WP

OUT

f : 32kHz

2164-24.EPS

PACKAGE MECHANICALDATA

16 PINS- PLASTICPOWERDIP

TEA2164

I

L

b1

E

Dimensions

a1

Z

b

16

18

B

e3

D

e

9

F

Millimeters Inches

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

a1 0.51 0.020

B 0.85 1.4 0.033 0.055

b 0.5 0.020

b1 0.38 0.5 0.015 0.020

D 20 0.787
E 8.8 0.346

e 2.54 0.100

e3 17.78 0.700

F 7.1 0.280

i 5.1 0.201

L 3.3 0.130

Z 1.27 0.050

PMDIP16W.EPS

DIP16PW.TBL

Information furnished is believed to be accurate andreliable.However, SGS-THOMSONMicroelectronics assumes no responsibility
for the consequences of use of such information norfor any infringement ofpatents or other rights of third partieswhich may result
from itsuse. Nolicence isgranted by implication orotherwise 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 productsare not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.

 1994 SGS-THOMSON Microelectronics - All Rights Reserved

Purchase of I

2

I

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

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2

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

2

the I

C Standard Specificationsas defined by Philips.

SGS-THOMSON Microelectronics GROUP OF COMPANIES

15/15