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TDA4605_03 Datasheet

  • TDA4605_03

  • CONTROL CIRCUIT FOR SWITCH MODE POWER SUPPLIES USING MOS TRA...

  • 7頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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TDA4605
CONTROL CIRCUIT FOR SWITCH MODE
POWER SUPPLIES USING MOS TRANSISTORS
s
s
s
s
s
s
s
s
s
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 Tran-
sistor 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 suita-
ble for Consumer as well as Industrial Power Sup-
plies.
Alternative source of the TDA4605 is also availa-
ble 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
1
2
3
4
8
7
6
5
ZERO CROSSING DETECTOR INPUT
SOFT-START
SUPPLY VOLTAGE
OUTPUT
4605-01.eps
September 2003
1/7
1

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