전원 관리 AC/DC 및 DC/DC 컨트롤러(외장 FET)

UCC2891

활성

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

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 DMAX 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 DMAX 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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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

설계 및 개발

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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 (...)
사용 설명서: PDF
TI.com에서 구매 불가
시뮬레이션 모델

UCC2891 TINA-TI Startup Reference Design

SLUM294.TSC (667 KB) - TINA-TI Reference Design
시뮬레이션 모델

UCC2891 TINA-TI Steady State Reference Design

SLUM292.TSC (183 KB) - TINA-TI Reference Design
시뮬레이션 모델

UCC2891 TINA-TI Transient Spice Model

SLUM293.ZIP (42 KB) - TINA-TI Spice Model
시뮬레이션 모델

UCC2891 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM050A.ZIP (117 KB) - PSpice Model
시뮬레이션 모델

UCC289x PSpice Average Model

SLUC118.ZIP (353 KB) - PSpice Model
시뮬레이션 모델

UCC289x TINA-TI Average Reference Design

SLUM154.TSC (834 KB) - TINA-TI Reference Design
시뮬레이션 모델

UCC289x TINA-TI Average Spice Model

SLUM155.ZIP (12 KB) - TINA-TI Spice Model
패키지 CAD 기호, 풋프린트 및 3D 모델
SOIC (D) 16 Ultra Librarian
TSSOP (PW) 16 Ultra Librarian

주문 및 품질

포함된 정보:
  • RoHS
  • REACH
  • 디바이스 마킹
  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
  • 지속적인 신뢰성 모니터링
포함된 정보:
  • 팹 위치
  • 조립 위치

지원 및 교육

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