UCC2893

AKTIV

Active-Clamp-PWM-Controller im Strommodus, 110 V, mit FET mit N-Kanal-Klemme und 0,75 V CS-Schwelle

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Datenblatt

document-pdfAcrobat UCC289x Current Mode Active Clamp PWM Controller datasheet (Rev. F) (Englisch)

UCC2893

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Topology

Active-clamp forward, Flyback, Forward

Control mode

Current

Features

High-voltage startup, Input line monitor, Multi-topology, Programmable slope compensation, Soft start, Soft switching, Supports NFET clamp

Duty cycle (max) (%)

100

Topology

Active-clamp forward, Flyback, Forward

Control mode

Current

Features

High-voltage startup, Input line monitor, Multi-topology, Programmable slope compensation, Soft start, Soft switching, Supports NFET clamp

Duty cycle (max) (%)

100

TSSOP (PW)

16

32 mm² (5 mm × 6.4 mm)

SOIC (D)

16

59.4 mm² (9.9 mm × 6 mm)

Low Output Jitter
Soft-Stop Shutdown of MAIN and AUX
Ideal for Active Clamp/Reset Forward, Flyback Converters
Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches
Peak Current-Mode Control with Cycle-by-Cycle Current Limiting
110-V Input Startup Regulator on UCC2891/3
TrueDrive™ 2-A Sink, 2-A Source Outputs
Accurate Line UV and Line OV Threshold
Programmable Slope Compensation
1.0-MHz Synchronizable Oscillator
Precise Programmable Maximum Duty Cycle
Programmable Soft Start
APPLICATIONS
- 150-W to 700-W SMPS
- High-Efficiency, Low EMI/RFI Off-Line or DC/DC Converters
- Server, 48-V Telecom, Datacom
- High Power Adapter, LCD-TV and PDP-TV

Low Output Jitter
Soft-Stop Shutdown of MAIN and AUX
Ideal for Active Clamp/Reset Forward, Flyback Converters
Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches
Peak Current-Mode Control with Cycle-by-Cycle Current Limiting
110-V Input Startup Regulator on UCC2891/3
TrueDrive™ 2-A Sink, 2-A Source Outputs
Accurate Line UV and Line OV Threshold
Programmable Slope Compensation
1.0-MHz Synchronizable Oscillator
Precise Programmable Maximum Duty Cycle
Programmable Soft Start
APPLICATIONS
- 150-W to 700-W SMPS
- High-Efficiency, Low EMI/RFI Off-Line or DC/DC Converters
- Server, 48-V Telecom, Datacom
- High Power Adapter, LCD-TV and PDP-TV

The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.

The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.

The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by.

Additional features include an internal programmable slope compensation circuit, precise D_MAX limit, and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter\x92s ON and OFF transitions with regard to the bulk input voltage. Along with the UCC2897, this UCC289x family allows the power supply designer to eliminate many of the external components, reducing the size and complexity of the design.

The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.

The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.

The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by.

Additional features include an internal programmable slope compensation circuit, precise D_MAX limit, and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter\x92s ON and OFF transitions with regard to the bulk input voltage. Along with the UCC2897, this UCC289x family allows the power supply designer to eliminate many of the external components, reducing the size and complexity of the design.

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Technische Dokumentation

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Top-Dokumentation	Typ	Titel	Datum
*	Datenblatt	UCC289x Current Mode Active Clamp PWM Controller datasheet (Rev. F)	01.07.2009
	Anwendungshinweis	Understanding and Designing an Active Clamp Current Mode Controlled Converter (Rev. A)	27.01.2020
	Auswahlhilfe	Power Management Guide 2018 (Rev. R)	25.06.2018
	Anwendungshinweis	Method of Providing Hiccup Operation for UCC2897AEVM	27.08.2009
	Anwendungshinweis	UCC2891 Active Clamp	22.12.2003
	Weitere Dokumente	Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset	15.02.2001
	Weitere Dokumente	Seminar 1000 Topic 3 - Active Clamp and Reset Technique	15.02.2001

Design und Entwicklung

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