TEA2018A datasheet(1/7 Pages) STMICROELECTRONICS

Nome de Peças	TEA2018A

Descrição Electrónicos	CURRENT MODE SWITCHING POWER SUPPLY CONTROL CIRCUIT

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Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

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TEA2018A

CURRENT MODE SWITCHING

POWER SUPPLY CONTROL CIRCUIT

May 1993

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5

OSCILLATOR

GROUND

COLLECTOR CURRENT SENSING

NEGATIVE SUPPLY VOLTAGE

ERROR AMPLIFIER NON-INVERTING INPUT

DEMAGNETIZATION SENSING

POSITIVE SUPPLY VOLTAGE

OUTPUT

PIN CONNECTIONS

DIP8

(Plastic Package)

ORDER CODE : TEA2018A

.

DIRECT

DRIVE

OF

THE

EXTERNAL

SWITCHING TRANSISTOR

.

POSITIVE AND NEGATIVE OUTPUT CUR-

RENTS UP TO 0.5 A

.

CURRENT LIMITATION

.

TRANSFORMER DEMAGNETIZATION

SENSING

.

FULL OVERLOAD AND SHORT-CIRCUIT

PROTECTION

.

PROPORTIONAL BASE CURRENT DRIVING

.

LOW STANDBY CURRENT BEFORE START-

ING (< 1.6 mA)

.

THERMAL PROTECTION

DESCRIPTION

The TEA2018A is an 8-pin DIP low-cost integrated

circuit designed for the control of switch mode

power supplies.

Due to its current mode regulation, the TEA2018A

facilitates design of power supplies with following

features :

.

High stability regulation loop

.

Automatic input voltage feed-forward in dis-

continuous mode fly-back

.

Automatic pulse-by-pulse current limitation

Typical applications : Video Display Units, TV sets,

typewriters, microcomputers and industrial applica-

tions

Where synchronization is required, use the

TEA2019. For more details, see application

note AN406/0591

1/7

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