TDA4605(1996) 查看數據表（PDF） - STMicroelectronics

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TDA4605
(Rev.:1996)

CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS

STMicroelectronics 

TDA4605

CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES

USING MOS TRANSISTORS

. FOLD-BACK CHARACTERISTIC PROVIDES

OVERLOAD PROTECTION FOR EXTERNAL

DIODES

. BURST OPERATION UNDER SHORT-CIR-

CUIT AND NO LOAD CONDITIONS

. LOOP ERROR PROTECTION

. SWITCH-OFF IN CASE OF TOO LOW LINE

VOLTAGE (under voltage switch-off)

. LINE VOLTAGE COMPENSATION OF OVER-

LOAD POINT

. SOFT-START FOR SMOOTH START-UP

. CHIP OVER-TEMPERATURE PROTECTION

(thermal shutdown)

. ON-CHIP PARASITIC TRANSFORMER OS-

CILLATION SUPPRESSION CIRCUITRY

. DECREASE OF REGULATED VOLTAGE FOR

LOW POWER CONSUMPTION

DIP8

(Plastic Package)

ORDER CODE : TDA4605

DESCRIPTION

The IC TDA4605 controls the MOS Power Transis-

tor and performs all necessary regulation and

monitoring functions in free running flyback con-

verters. Since good load regulation over a wide

load range is attained, this IC is particularly suitable

for Consumer as well as Industrial Power Supplies.

Alternative source of the TDA4605 is also avail-

able from SIEMENS Semiconductors Consumer

Electronics A.G.

PIN CONNECTIONS

SO8

(Plastic Micropackage)

ORDER CODE : TDA4605D

REGULATION INPUT

1

PRIMARY CURRENT SIMULATION

2

PRIMARY VOLTAGE MONITORING

3

GROU ND

4

8

ZERO CROSSING DETECTOR INPUT

7

SOFT-START

6

SUPPLY VOLTAGE

5

OUTPUT

April 1996

1/6

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