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 PIN CONNECTIONS SO8 (Plastic Micropackage) ORDER CODE : TDA4605D REGULATION INPUT PRIMARY CURRENT SIMULATION PRIMARY VOLTAGE MONITORING GROUND 1 2 3 4 8 7 6 5 ZERO CROSSING DETECTOR INPUT SOFT-START SUPPLY VOLTAGE OUTPUT 4605-01.EPS April 1996 1/6 TDA4605 PIN CONFIGURATION Pin Number 1 DESCRIPTION
Regulating voltage : information input concerning secondary voltage. When a value is reached that is derived from the regulating voltage at Pin 1, the output pulse at Pin 5 is terminated. The RC element serves to set the maximum power at the overload point. Primary voltage detector : input for primary voltage monitoring. When the line voltage is too low the IC is switched-off by comparing V 3 with an internal reference.
STMicroelectronics
