TDA4605 Datasheet, PDF (1/6 Pages) STMicroelectronics – CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRANSISTORS

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
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