UCC2891

활성

P-채널 클램프 FET 및 0.75V CS 임계값을 지원하는 110V 능동 클램프 전류 모드 PWM 컨트롤러

지금 주문

데이터 시트

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

UCC2891

활성

데이터 시트

지금 주문

제품 상세 정보

Vin (max) (V)

16

Operating temperature range (°C)

-40 to 85

Control mode

Current

Topology

Active-clamp forward, Flyback, Forward

Rating

Catalog

Features

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

Duty cycle (max) (%)

100

Vin (max) (V)

16

Operating temperature range (°C)

-40 to 85

Control mode

Current

Topology

Active-clamp forward, Flyback, Forward

Rating

Catalog

Features

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

Duty cycle (max) (%)

100

SOIC (D)

16

59.4 mm² 9.9 x 6

TSSOP (PW)

16

32 mm² 5 x 6.4

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.

filter

기타 AC/DC 및 DC/DC 컨트롤러(외장 FET) 찾기

다운로드 스크립트와 함께 비디오 보기 동영상

관심 가지실만한 유사 제품

open-in-new

대안 비교

비교 대상 장치와 유사한 기능

UCC2897A

활성

P 채널 클램프 FET 및 라인 OV 보호를 지원하는 110V 능동 클램프 전류 모드 PWM 컨트롤러 Supports active clamp topology

기술 자료

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12개 모두 보기

	유형	직함	날짜
*	Data sheet	UCC289x Current Mode Active Clamp PWM Controller datasheet (Rev. F)	2009/07/01
	Application note	Understanding and Designing an Active Clamp Current Mode Controlled Converter (Rev. A)	2020/01/27
	Selection guide	Power Management Guide 2018 (Rev. R)	2018/06/25
	Analog Design Journal	1Q 2013Issue Analog Applications Journal	2013/01/22
	Analog Design Journal	Design of a 60-A interleaved active-clamp forward converter	2013/01/22
	User guide	48-V to 3.3-V Forward Converter w/Active Clamp Reset Using the UCC2891 Active Cl (Rev. A)	2012/04/13
	Application note	Method of Providing Hiccup Operation for UCC2897AEVM	2009/08/27
	User guide	48-V to 3.3-V Forward Converter w/Active Clamp Reset (Rev. A)	2006/12/12
	Application note	Active Clamp Transformer Reset: High Side or Low Side?	2004/09/17
	Application note	UCC2891 Active Clamp	2003/12/22
	More literature	Seminar 1000 Topic 3 - Active Clamp and Reset Technique	2001/02/15
	More literature	Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset	2001/02/15

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평가 보드

UCC2891EVM-520 — UCC2891 전류 모드 능동 클램프 PWM 컨트롤러용 평가 모듈

The UCC2891EVM evaluation module (EVM) is a forward converter providing a 3.3V regulated output at 30A of load current, operating from a 48V input. The EVM operates over the full 36V to 75V telecom input range, and is able to fully regulate down to zero load current. The module uses the UCC2891 (...)

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