TDA4605 - IC for Switched-Mode Power Supplies

FOLD-BACK CHARACTERISTIC PROVIDES OVERLOAD PROTECTION FOR EXTERNAL DIODES

BURST OPERATION UNDER SHORT-CIRCUIT AND NO LOAD CONDITIONS

LOOP ERROR PROTECTION

SWITCH-OFF IN CASE OF TOO LOW LINE VOLTAGE (under voltage switch-off)

LINE VOLTAGE COMPENSATION OF OVERLOAD POINT

SOFT-START FOR SMOOTH START-UP

CHIP OVER-TEMPERATURE PROTECTION (thermal shutdown)

ON-CHIP PARASITIC TRANSFORMER OSCILLATION SUPPRESSION CIRCUITRY

DECREASE OF REGULATED VOLTAGE FOR LOW POWER CONSUMPTION DESCRIPTION

The IC TDA4605 controls the MOS Power Transistor and performs all necessary regulation and
monitoring functions in free running flyback converters. 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 available from SIEMENS Semiconductors Consumer
Electronics A.G.