TDA46053HKLA1

TDA46053HKLA1 Datasheet

TDA4605-3

Part	Datasheet
TDA46053HKLA1	TDA46053HKLA1 (pdf)

PDF Datasheet Preview
Datasheet, V2.0, 1 Jul 2002 PWM-QR IC TDA4605-3 Control IC for Switched-Mode Power Supplies using MOS-Transistors Power Management & Supply Never stop thinking. TDA4605-3 2002-07-01 Previous Version: Datasheet For questions on technology, delivery and prices please contact the Infineon Technologies Offices in Germany or the Infineon Technologies Companies and Representatives worldwide see our webpage at Edition 2002-07-01 Published by Infineon Technologies AG, St.-Martin-Strasse 53, D-81541 München Infineon Technologies AG All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as warranted characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Infineon Technologies is an approved CECC manufacturer. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office in Germany or our Infineon Technologies Representatives worldwide see address list . Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. Control IC for Switched-Mode Power Supplies using MOS-Transistor TDA 4605-3 Bipolar IC q Fold-back characteristics provides overload protection for external components q Burst operation under secondary short-circuit condition implemented q Protection against open or a short of the control loop q Switch-off if line voltage is too low undervoltage switch-off q Line voltage depending compensation of fold-back point q Soft-start for quiet start-up without noise generated by the transformer q Chip-over temperature protection implemented thermal shutdown q On-chip ringing suppression circuit against parasitic oscillations of the transformer q AGC-voltage reduction at low load P-DIP-8-1 Type TDA 4605-3 Ordering Code Q67000-A5066 Package P-DIP-8-1 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. Version 1 Jul 2002 TDA 4605-3 In the different load ranges the switched-mode power supply SMPS behaves as follows: No load operation The power supply is operating in the burst mode at typical 20 to 40 kHz. The output voltage can be a little bit higher or lower than the nominal value depending of the design of the transformer and the resistors of the control voltage divider. Nominal operation The switching frequency is reduced with increasing load and decreasing AC-voltage. The output voltage is only dependent on the load. Overload point Maximal output power is available at this point of the output characteristic. Overload The energy transferred per operation cycle is limited at the top. Therefore the output voltages declines by secondary overloading. Version 1 Jul 2002 TDA 4605-3 Pin Definitions and Functions Pin No. 1 2 Function Information Input Concerning Secondary Voltage. By comparing the regulating voltage - obtained trom the regulating winding of the transformer - with the internal reference voltage, the output impulse width on pin 5 is adjusted to the load of the secondary side normal, overload, short-circuit, no load . Information Input Regarding the Primary Current. The primary current rise in the primary winding is simulated at pin 2 as a voltage rise by means of external RC-element. When a voltage level is reached thats derived from the regulating voltage at pin 1, the output impulse at pin 5 is terminated. The RC-element serves to set the maximum power at the overload point set. Input for Primary Voltage Monitoring In the normal operation V3 is moving between the thresholds V3H and V3L V3H > V3 > V3L . V3 < V3L SMPS is switched OFF line voltage too low . V3 > V3H Compensation of the overload point regulation controlled by pin 2 starts at V3H V3L = Ground Output Push-pull output provides ± 1 A for rapid charge and discharge of the gate capacitance of the power MOS-transistor. Supply Voltage Input A stable internal reference voltage VREF is derived from the supply voltage also the switching thresholds V6A , V6E , V6 max and V6 min for the supply voltage detector. If V6 > V6E then VREF is switched on and swiched off when V6 < V6A In addition the logic is only enable for V6 min < V6 < V6 max. Input for Soft-Start. Start-up will begin with short pulses by connecting a capacitor from pin 7 to ground. Input for the Oscillation Feedback. After starting oscillation, every zero transition of the feedback voltage falling edge through zero falling edge triggers an output pulse at pin The trigger threshold is at + 50 mV typical. Version 1 Jul 2002 TDA 4605-3 Block Diagram Version 1 Jul 2002 TDA 4605-3 Circuit Description

PDF Datasheet Preview

Datasheet, V2.0, 1 Jul 2002

PWM-QR IC

TDA4605-3

Control IC for Switched-Mode Power Supplies using MOS-Transistors

Power Management & Supply

Never stop thinking.

TDA4605-3
2002-07-01

Previous Version:

Datasheet

For questions on technology, delivery and prices please contact the Infineon Technologies Offices in Germany or the Infineon Technologies Companies and Representatives worldwide see our webpage at

Edition 2002-07-01

Published by Infineon Technologies AG, St.-Martin-Strasse 53, D-81541 München

Infineon Technologies AG

All Rights Reserved.

Attention please!

The information herein is given to describe certain components and shall not be considered as warranted characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Infineon Technologies is an approved CECC manufacturer.

Information

For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office in Germany or our Infineon Technologies Representatives worldwide see address list .

Warnings

Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.

Control IC for Switched-Mode Power Supplies using MOS-Transistor

TDA 4605-3

Bipolar IC
q Fold-back characteristics provides overload protection for external components
q Burst operation under secondary short-circuit condition implemented
q Protection against open or a short of the control loop q Switch-off if line voltage is too low undervoltage switch-off q Line voltage depending compensation of fold-back point q Soft-start for quiet start-up without noise generated by the
transformer q Chip-over temperature protection implemented thermal
shutdown q On-chip ringing suppression circuit against parasitic
oscillations of the transformer q AGC-voltage reduction at low load

P-DIP-8-1

Type TDA 4605-3
Ordering Code Q67000-A5066

Package P-DIP-8-1

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.

Version
1 Jul 2002

TDA 4605-3

In the different load ranges the switched-mode power supply SMPS behaves as follows:

No load operation The power supply is operating in the burst mode at typical 20 to 40 kHz. The output voltage can be a little bit higher or lower than the nominal value depending of the design of the transformer and the resistors of the control voltage divider.

Nominal operation The switching frequency is reduced with increasing load and decreasing AC-voltage. The output voltage is only dependent on the load.

Overload point Maximal output power is available at this point of the output characteristic.

Overload The energy transferred per operation cycle is limited at the top. Therefore the output voltages declines by secondary overloading.

Version
1 Jul 2002

TDA 4605-3

Pin Definitions and Functions

Pin No. 1 2

Function

Information Input Concerning Secondary Voltage. By comparing the regulating voltage - obtained trom the regulating winding of the transformer - with the internal reference voltage, the output impulse width on pin 5 is adjusted to the load of the secondary side normal, overload, short-circuit, no load .

Information Input Regarding the Primary Current. The primary current rise in the primary winding is simulated at pin 2 as a voltage rise by means of external RC-element. When a voltage level is reached thats derived from the regulating voltage at pin 1, the output impulse at pin 5 is terminated. The RC-element serves to set the maximum power at the overload point set.

Input for Primary Voltage Monitoring In the normal operation V3 is moving between the thresholds V3H and V3L V3H > V3 > V3L . V3 < V3L SMPS is switched OFF line voltage too low . V3 > V3H Compensation of the overload point regulation controlled by pin 2 starts at V3H V3L =

Ground

Output Push-pull output provides ± 1 A for rapid charge and discharge of the
gate capacitance of the power MOS-transistor.

Supply Voltage Input A stable internal reference voltage VREF is derived from
the supply voltage also the switching thresholds V6A , V6E , V6 max and V6 min for
the supply voltage detector. If V6 > V6E then VREF is switched on and swiched off
when V6 < V6A In addition the logic is only enable for V6 min < V6 < V6 max.

Input for Soft-Start. Start-up will begin with short pulses by connecting a
capacitor from pin 7 to ground.

Input for the Oscillation Feedback. After starting oscillation, every zero
transition of the feedback voltage falling edge through zero falling edge
triggers an output pulse at pin The trigger threshold is at + 50 mV typical.

Version
1 Jul 2002

TDA 4605-3

Block Diagram

Version
1 Jul 2002

TDA 4605-3

Circuit Description

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived TDA46053HKLA1 Datasheet file may be downloaded here without warranties.

Datasheet ID: TDA46053HKLA1 638704