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

產品詳細資料

Vin (max) (V) 16 Operating temperature range (°C) -40 to 125 Control mode Current Topology Active-clamp forward Rating Catalog Features High-voltage startup, Input line monitor, Programmable slope compensation, Soft start, Soft switching, Supports PFET clamp Duty cycle (max) (%) 74
Vin (max) (V) 16 Operating temperature range (°C) -40 to 125 Control mode Current Topology Active-clamp forward Rating Catalog Features High-voltage startup, Input line monitor, Programmable slope compensation, Soft start, Soft switching, Supports PFET clamp Duty cycle (max) (%) 74
TSSOP (PW) 20 41.6 mm² 6.5 x 6.4 VQFN (RGP) 20 16 mm² 4 x 4
  • Low-output jitter
  • Soft-stop shutdown of MAIN and AUX
  • 110-V input startup function
  • Ideal for active-clamp, reset-forward, flyback and synchronous rectifier uses
  • Provides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switches
  • Peak current-mode control with 0.5-V cycle-by-cycle current limiting
  • TrueDrive™ 2-A Sink, 2-A source outputs
  • Trimmed internal-bandgap reference for accurate line UV and line OV threshold
  • Programmable slope compensation
  • High-performance 1-MHz synchronizable oscillator with internal timing capacitor
  • Precise programmable maximum duty cycle
  • PB-free lead finish package
  • Low-output jitter
  • Soft-stop shutdown of MAIN and AUX
  • 110-V input startup function
  • Ideal for active-clamp, reset-forward, flyback and synchronous rectifier uses
  • Provides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switches
  • Peak current-mode control with 0.5-V cycle-by-cycle current limiting
  • TrueDrive™ 2-A Sink, 2-A source outputs
  • Trimmed internal-bandgap reference for accurate line UV and line OV threshold
  • Programmable slope compensation
  • High-performance 1-MHz synchronizable oscillator with internal timing capacitor
  • Precise programmable maximum duty cycle
  • PB-free lead finish package

The UCC2897A PWM controller simplifies implementation of the various active clamp or reset and synchronous rectifier switching power topologies.

The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-width modulator. The controller includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active-clamp operation.

Features include an internal programmable slope compensation circuit, precise DMAX limit, and a synchronizable oscillator with an internal-timing capacitor. An accurate line-monitoring function also programs the ON and OFF transitions of the converter with regard to the bulk input voltage, VIN.

The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages.

The UCC2897A PWM controller simplifies implementation of the various active clamp or reset and synchronous rectifier switching power topologies.

The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-width modulator. The controller includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active-clamp operation.

Features include an internal programmable slope compensation circuit, precise DMAX limit, and a synchronizable oscillator with an internal-timing capacitor. An accurate line-monitoring function also programs the ON and OFF transitions of the converter with regard to the bulk input voltage, VIN.

The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages.

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類型 標題 日期
* Data sheet UCC2897A Advanced Current-Mode Active-Clamp PWM Controller datasheet (Rev. G) PDF | HTML 2019年 1月 27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
Application note Slope Compensation Design for UCC2897A 2017年 10月 30日
Technical article Flyback converters: two outputs are better than one PDF | HTML 2016年 11月 24日
Technical article Excuse me for being a little forward... with my topology PDF | HTML 2015年 10月 21日
Application note UCC2897A Peak Current Mode Active Clamp Forward Converter Small Signal Modeling 2014年 1月 17日
Application note External Slope Compensation for UCC2897A in Some Special Applications 2010年 1月 5日
Application note Method of Providing Hiccup Operation for UCC2897AEVM 2009年 8月 27日
EVM User's guide Using the UCC2897AEVM 2009年 2月 27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

設計與開發

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使用指南: PDF
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使用指南: PDF | HTML
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開發板

UCC2897AEVM — UCC2897A 評估模組

The UCC2897A evaluation module (EVM) is an active clamp reset forward converter providing a 3.3-V regulated output at 30 A of load current, operating from a 48-V input. The design operates over the full 36-V to 72-V telecom input range, and is able to fully regulate down to zero load current. The (...)

使用指南: PDF
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模擬型號

UCC2897A PSpice Transient Model

SLUM429.ZIP (122 KB) - PSpice Model
模擬型號

UCC2897A TINA-TI Startup Transient Reference Design

SLUM605.TSC (5104 KB) - TINA-TI Reference Design
模擬型號

UCC2897A TINA-TI Steady State Transient Reference Design

SLUM606.TSC (2323 KB) - TINA-TI Reference Design
模擬型號

UCC2897A TINA-TI Transient Spice Model

SLUM604.ZIP (43 KB) - TINA-TI Spice Model
計算工具

SLUC662 UCC2897A Design Calculator

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AC/DC 和 DC/DC 控制器 (外部 FET)
UCC2897A 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

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
TSSOP (PW) 20 Ultra Librarian
VQFN (RGP) 20 Ultra Librarian

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