UCC2891

現行

具有 P 通道鉗位 FET 和 0.75V CS 閾值的 110-V 主動鉗位電流模式 PWM 控制器

立即訂購

產品規格表

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

UCC2891

現行

產品規格表

立即訂購

產品詳細資料

Vin (max) (V)

16

Operating temperature range (°C)

-40 to 85

Control mode

Current

Topology

Active-clamp forward, Flyback, Forward

Rating

Catalog

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

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.

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UCC2897A

現行

具 P 通道箝位 FET 和線路 OV 保護的 110-V 主動箝位電流模式 PWM 控制器 Supports active clamp topology

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	類型	標題	日期
*	Data sheet	UCC289x Current Mode Active Clamp PWM Controller datasheet (Rev. F)	2009年 7月 1日
	Application note	Understanding and Designing an Active Clamp Current Mode Controlled Converter (Rev. A)	2020年 1月 27日
	Selection guide	Power Management Guide 2018 (Rev. R)	2018年 6月 25日
	Analog Design Journal	1Q 2013Issue Analog Applications Journal	2013年 1月 22日
	Analog Design Journal	Design of a 60-A interleaved active-clamp forward converter	2013年 1月 22日
	User guide	48-V to 3.3-V Forward Converter w/Active Clamp Reset Using the UCC2891 Active Cl (Rev. A)	2012年 4月 13日
	Application note	Method of Providing Hiccup Operation for UCC2897AEVM	2009年 8月 27日
	User guide	48-V to 3.3-V Forward Converter w/Active Clamp Reset (Rev. A)	2006年 12月 12日
	Application note	Active Clamp Transformer Reset: High Side or Low Side?	2004年 9月 17日
	Application note	UCC2891 Active Clamp	2003年 12月 22日
	More literature	Seminar 1000 Topic 3 - Active Clamp and Reset Technique	2001年 2月 15日
	More literature	Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset	2001年 2月 15日

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開發板

UCC2891EVM-520 — 適用於 UCC2891 電流模式主動鉗位 PWM 控制器的評估模組

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 (...)

使用指南: PDF