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UCC28700

正在供货

具有 PSR 和可编程电缆补偿功能的恒压、恒流 PWM

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数据表

UCC28700

正在供货
数据表 立即订购

产品详情

Topology Buck, Flyback Control mode Primary-side regulation Features CC/CV output regulation, Cable compensation, Current limiting, DCM, Leading edge blanking, Low power, Overcurrent protection, Primary-side regulated, Quasi-Resonant, Soft start, Valley switching Duty cycle (max) (%) 99 Sector Test & measurement
Topology Buck, Flyback Control mode Primary-side regulation Features CC/CV output regulation, Cable compensation, Current limiting, DCM, Leading edge blanking, Low power, Overcurrent protection, Primary-side regulated, Quasi-Resonant, Soft start, Valley switching Duty cycle (max) (%) 99 Sector Test & measurement
SOT-23 (DBV) 6 8.12 mm² (2.9 mm × 2.8 mm)
  • < 30-mW No-Load Power for 5-Star Rating
  • Primary-Side Regulation (PSR) Eliminates Opto-Coupler
  • ±5% Voltage and Current Regulation
  • 130-kHz Maximum Switching Frequency Enables High-Power
    Density Charger Designs
  • Quasi-Resonant Valley-Switching Operation for Highest
    Overall Efficiency
  • Patent-Pending Frequency-Jitter Scheme to Ease EMI
    Compliance
  • Wide VDD Range Allows Small Bias Capacitor
  • Clamped Gate-Drive Output for MOSFET
  • Protection Functions: Overvoltage, Low-Line, and
    Overcurrent
  • Programmable Cable Compensation (UCC28700 Only)
  • NTC Resistor Interface (UCC28701, UCC28702 and UCC28703
    Only) With Fixed Cable Compensation Options
  • SOT-23 Package
  • < 30-mW No-Load Power for 5-Star Rating
  • Primary-Side Regulation (PSR) Eliminates Opto-Coupler
  • ±5% Voltage and Current Regulation
  • 130-kHz Maximum Switching Frequency Enables High-Power
    Density Charger Designs
  • Quasi-Resonant Valley-Switching Operation for Highest
    Overall Efficiency
  • Patent-Pending Frequency-Jitter Scheme to Ease EMI
    Compliance
  • Wide VDD Range Allows Small Bias Capacitor
  • Clamped Gate-Drive Output for MOSFET
  • Protection Functions: Overvoltage, Low-Line, and
    Overcurrent
  • Programmable Cable Compensation (UCC28700 Only)
  • NTC Resistor Interface (UCC28701, UCC28702 and UCC28703
    Only) With Fixed Cable Compensation Options
  • SOT-23 Package

The UCC28700 family of flyback power supply controllers provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Low start-up current, dynamically controlled operating states and a tailored modulation profile support very low standby power without sacrificing start-up time or output transient response.

Control algorithms in the UCC28700 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous Conduction Mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controllers have a maximum switching frequency of 130 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28700 allows the level of cable compensation to be programmed. The UCC28701, UCC28702, and UCC28703 devices allow remote temperature sensing using a Negative Temperature Coefficient (NTC) resistor while providing fixed cable-compensation levels.

The UCC28700 family of flyback power supply controllers provides Constant-Voltage (CV) and Constant-Current (CC) output regulation without the use of an optical coupler. The devices process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Low start-up current, dynamically controlled operating states and a tailored modulation profile support very low standby power without sacrificing start-up time or output transient response.

Control algorithms in the UCC28700 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous Conduction Mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.

The controllers have a maximum switching frequency of 130 kHz and always maintain control of the peak-primary current in the transformer. Protection features help keep primary and secondary component stresses in check. The UCC28700 allows the level of cable compensation to be programmed. The UCC28701, UCC28702, and UCC28703 devices allow remote temperature sensing using a Negative Temperature Coefficient (NTC) resistor while providing fixed cable-compensation levels.
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技术文档

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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 UCC2870x Constant-Voltage, Constant-Current Controller With Primary-Side Regulation 数据表 (Rev. A) PDF | HTML 2014-12-12
应用手册 Flyback Aux Winding OVP and UVLO Fault Sensing Design and Troubleshooting Tips PDF | HTML 2021-8-31
应用手册 L1 和 L2 电动汽车充电器电动汽车服务设备设计注意事项 (Rev. B) PDF | HTML 英语版 (Rev.B) 2021-7-16
应用手册 Minimize Standby Consumption for UCC287XX Family 2019-8-1
选择指南 电源管理指南 2018 2018-7-31
技术文章 Making a solar inverter more reliable than the sun PDF | HTML 2017-8-1
技术文章 Common challenges when choosing the auxiliary power supply for your Server PSU PDF | HTML 2017-3-20
应用手册 Troubleshooting TI PSR controllers 2016-10-3
技术文章 USB Wall Chargers: Conveniences and Challenges PDF | HTML 2015-10-6
白皮书 Control Challenges for Low Power AC/DC Converters 2015-10-2
白皮书 Control Challenges for Low Power AC/DC Converters (PPT) 2015-10-2
技术文章 Designing multiple output converters with primary side sensing PDF | HTML 2015-8-4
应用手册 Analysis of Starting Up Performance for UCC28700 2014-3-11
应用手册 UCC28700 5-W USB Flyback Design Review (Rev. C) 2014-2-21
更多文献资料 Exposing the Inner Behavior of a Quasi-Resonant Flyback Converter 2013-10-29

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

UCC28700EVM-068 — UCC28700 评估模块

德州仪器 (TI) UCC28700EVM-068 评估模块 (EVM) 可帮助设计人员评估 UCC28700 恒压恒流 PWM（带初级侧调节功能）的性能。5W EVM 用于评估 USB 应用的离线适配器。 该转换器将 90V 至 265V RMS 输入电压降压至 5V 直流，并为 USB 适配器应用设置 1A 电流限制。它的用途是进行评估，而非作为最终产品。
用户指南: PDF
支持的产品和硬件
有库存
限制：
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无货
评估板

UCC28711EVM-160 — UCC28711 评估模块

德州仪器 (TI) UCC28711EVM-160 评估模块 (EVM) 可帮助设计人员评估 UCC28711 恒压恒流 PWM（带一次侧调节功能）的性能。5W EVM 用于评估适用于 USB 应用中的离线适配器。该转换器将 90V 至 265V 的有效值输入电压降压至 5V 直流电，并为 USB 适配器应用设置 1A 电流限制。它的用途是进行评估，而非作为最终产品。
用户指南: PDF
支持的产品和硬件
有库存
限制：
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无货
评估板

UCC28720EVM-212 — 用于 USB 离线适配器的 UCC28720EVM-212 5W 评估模块

UCC28720EVM-212 是一个 5W 评估模块，用于评估 USB 应用的离线适配器。它的用途是进行评估，而非作为最终产品。UCC28720EVM-212 将 100V 至 240V RMS 输入电压转换为 5VDC，具有 1A 的电流限制，适用于 USB 适配器应用。
用户指南: PDF
支持的产品和硬件
有库存
限制：
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无货
仿真模型

UCC2870x PSPICE Transient Model

SLUM455.ZIP (131 KB) - PSpice 模型
支持的产品和硬件
仿真模型

UCC2870x TINA-TI Transient Reference Design

SLUM619.TSC (195 KB) - TINA-TI 参考设计
支持的产品和硬件
仿真模型

UCC2870x TINA-TI Transient Spice Model

SLUM617.ZIP (101 KB) - TINA-TI Spice 模型
支持的产品和硬件
计算工具

SLUC381 — MathCAD Design Tool

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计算工具

SLUC408 — UCC28700 Excel 97 Design Tool

支持的产品和硬件

许多 TI 参考设计都包括 UCC28700

通过我们的参考设计选择工具来审查并确定最适用于您应用和参数的设计。
封装 引脚 CAD 符号、封装和 3D 模型
SOT-23 (DBV) 6 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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