TDA4605-15 Siemens Semiconductor Group, TDA4605-15 Datasheet

TDA4605-15

Manufacturer Part Number

TDA4605-15

Description

Manufacturer

Siemens Semiconductor Group

Datasheet

1.TDA4605-15.pdf (20 pages)

Specifications of TDA4605-15

Case

DIP8

Date_code

07+

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Control IC for Switched-Mode Power Supplies

using MOS-Transistor

Features

Type

TDA 4605-3

The IC TDA 4605-3 controls the MOS-power transistor and performs all necessary control and

protection functions in free running flyback converters. Because of the fact that a wide load range

is achieved, this IC is applicable for consumer as well as industrial power supplies.

The serial circuit and primary winding of the flyback transformer are connected in series to the input

voltage. During the switch-on period of the transistor, energy is stored in the transformer. During the

switch-off period the energy is fed to the load via the secondary winding. By varying switch-on time

of the power transistor, the IC controls each portion of energy transferred to the secondary side

such that the output voltage remains nearly independent of load variations. The required control

information is taken from the input voltage during the switch-on period and from a regulation winding

during the switch-off period. A new cycle will start if the transformer has transferred the stored

energy completely into the load.

Semiconductor Group

Fold-back characteristics provides overload protection for

external components

Burst operation under secondary short-circuit condition

implemented

Protection against open or a short of the control loop

Switch-off if line voltage is too low (undervoltage switch-off)

Line voltage depending compensation of fold-back point

Soft-start for quiet start-up without noise generated by the

transformer

Chip-over temperature protection implemented (thermal

shutdown)

On-chip ringing suppression circuit against parasitic

oscillations of the transformer

AGC-voltage reduction at low load

Ordering Code

Q67000-A5066

Package

P-DIP-8-1

TDA 4605-3

Bipolar IC

06.94

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