SGS Thomson Microelectronics TEA2262 Datasheet

SWITCH MODE POWER SUPPLY CONTROLLER

.

POSITIVE AND NEGATIVE OUTPUT CUR­RENTUP TO 1A

.

LOW START-UPCURRENT

.

DIRECT DRIVE OF THE MOS POWER
TRANSISTOR

.

TWOLEVELS TRANSISTORCURRENTLIMI­TATION

.

DOUBLEPULSE SUPPRESSION

.

SOFT-STARTING

.

UNDER ANDOVERVOLTAGELOCK-OUT

.

AUTOMATIC STAND-BYMODE

.

LARGE POWER RANGE CAPABILITY IN
STAND-BY (Burst mode)

.

INTERNAL PWM SIGNAL GENERATOR

TEA2262

DESCRIPTION

The TEA2262is a monolithic integrated circuit for
the usein primarypartofanoff-lineswitchingmode
power supplyusing a MOSpower transistor.

All functionsrequired for SMPS controlunder nor­mal operating,transientorabnormalconditionsare
provided.

The capabilityof workingaccordingto the ”master­slave” concept, or accordingto the”primary regu­lation” modemakesthe TEA2262very flexible and
easy to use. Thisis particularlytrue for TVreceiv­ers wheretheICprovidesanattractiveandlowcost
solution (no need of stand-byauxiliary power sup­ply).

PINCONNECTIONS

TRANSFORMER DEMAGNETIZATION

SENSING INPUT

SECONDARY PULSES INPUT

POWER TRANSISTOR

CURRENT LIMITATION INPUT

GROUND
GROUND

ERROR AMPLIFIER INPUT (INVERTING)

ERROR AMPLIFIER OUTPUT

OVERLOAD INTEGRATION CAPACITOR

I

max.

GND
GND

C2

1

IS

2

IN

3
4
5
6

E

7

S

8

DIP16

(Plastic Package)

ORDER CODE :TEA2262

16
15
14
13
12
11
10

9

POWER SUPPLY

V

CC

POSITIVE OUTPUT STAGE SUPPLY

V

POWER OUTPUT

OUT

GROUND

GND

GROUND

GND

OSCILLATOR RESISTOR

R0

OSCILLATOR CAPACITOR

C0

SOFT-START CAPACITOR

C1

2262-01.EPS

April 1996

1/9

TEA2262

BLOCK DIAGRAM

15

V+

+1A

(Max.)

STAGE

OUTPUT

POSITIVE

OUT
14

CC

V

-1A

(Max.)

STAGE

OUTPUT

NEGATIVE

GNDI

Current

Limitation

MAX

15.7V
Protection

Overvoltage

CC

16

V

MONITORING

CC

V

8.5V 11.8V

LOGIC

PROCESSOR

Pulses

Regulation

Overload

Repetitive

Protection

45µA

2.55V 0.6V 0.84V

A

µ

10

Pulse

Secondary

2

8910

C

INIS

BIAS

INTERNAL

(2.49V)

REF

V

IS

LOGIC

12 3 45

0.15V

Pulses

Primary

Sensing

Demagnetization

S

LOGIC

MODULATOR

7

BURST

AUTOMATIC

GENERATION

0

C

f/4

Error

Amplifier

Modulators

OSCILLATOR

0

11 12 13

R

2/9

TEA2262

6
E

REF

V

2.49V

-1
(60%)

ON (Max.)

SOFT-START

T

1

C

2262-02.EPS

TEA2262

ABSOLUTEMAXIMUM RATINGS

Symbol Parameter Value Unit

V

CC

V+ Output Stage Power Supply V15-V4, 5, 12, 13 20 V

I

OUT

I

OUT

T

T

stg

THERMAL DATA

Symbol Parameter Value Unit

R

th (j-c)

R

th (j-a)

* Solderedon a 35µm,40cm2board copper area

Figure 1 : Maximum PowerDissipation

Power Supply V16-V4, 5, 12, 13 20 V

+ Positive Output Current (source current) 1.5 A

- Negative Output Current (sink current) 1.5 A
Operating Junction Temperature 150

j

Storage Temperature -40, +150

Junction-case Thermal Resistance 15

* Junction-ambient Thermal Resistance 50

P (W)

tot

4

3

o

50 C/W

2

o
o

o

C/W

o

C/W

C
C

2262-01.TBL

2262-02.TBL

1

o

T(C)

AMB

50 100 1500

2262-03.EPS

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Min. Typ. Max. Unit

V

CC

I

OUT

I

OUT

I

OUT

I

OUT

f

oper

V

IN

R

OSC

C

OSC

C1 Soft-starting Capacitor Range 0.047 1 µF
C2 Overload Integration Capacitor 0.047 1 µF

C2/C1 Ratio C2/C1 (C2 must be ≥ C1) 1

T

amb

Power Supply VCCstop 12 VCCmax V

+ Positive Output Current (source current) 1 A

- Negative Output Current (sink current) 1 A

+ Average Positive Output Current 0.3 A

- Average Negative Output Current 0.3 A
Operating Frequency 10 150 kHz
Input Pulses Amplitude (Pin 2) 1.5 2.5 4.5 V
Oscillator Resistor Range 10 100 kΩ
Oscillator Capacitor Range 0.33 4.7 nF

Operating Ambient Temperature -20 70

o

C

2262-03.TBL

3/9