TDA4605| Datasheet

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TDA4605
CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS
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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

DIP28 (Plastic Package) ORDER CODE: TDA4605

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.

SO8 (Plastic Micropackage) ORDER CODE: TDA4605D

Figure 1. Pin Connections

REGULATION INPUT PRIMARY CURRENT SIMULATION PRIMARY VOLTAGE MONITORING GROUND

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8 7 6 5

ZERO CROSSING DETECTOR INPUT SOFT-START SUPPLY VOLTAGE OUTPUT
4605-01.eps

September 2003

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TDA4605 DATASHEET