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交流/直流和直流/直流控制器（外部 FET）

UCC28250

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支持预偏置模式的高级半桥/全桥 PWM 控制器

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UCC28250

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产品详情

Vin (max) (V) 17 Operating temperature range (°C) -40 to 125 Control mode Current, Voltage Topology Forward, Full bridge, Half bridge, Push pull Rating Catalog Features Current limiting, High-voltage startup, SR logic Duty cycle (max) (%) 100
Vin (max) (V) 17 Operating temperature range (°C) -40 to 125 Control mode Current, Voltage Topology Forward, Full bridge, Half bridge, Push pull Rating Catalog Features Current limiting, High-voltage startup, SR logic Duty cycle (max) (%) 100
TSSOP (PW) 20 41.6 mm² 6.5 x 6.4 VQFN (RGP) 20 16 mm² 4 x 4
  • Prebiased Start-up
  • Synchronous Rectifier Control Outputs With Programmable Delays (Including Zero Delay Support)
  • Voltage Mode Control With Input Voltage Feed-Forward or Current Mode Control
  • Primary or Secondary-Side Control
  • 3.3-V, 1.5% Accurate Reference Output
  • 1-MHz Capable Switching Frequency
  • 1% Accurate Cycle-by-Cycle Overcurrent Protection with Matched Duty Cycle Outputs
  • Programmable Soft-Start and Hiccup Restart Timer
  • Thermally Enhanced 4-mm × 4-mm QFN-20 Package and 20-pin TSSOP Package
  • Prebiased Start-up
  • Synchronous Rectifier Control Outputs With Programmable Delays (Including Zero Delay Support)
  • Voltage Mode Control With Input Voltage Feed-Forward or Current Mode Control
  • Primary or Secondary-Side Control
  • 3.3-V, 1.5% Accurate Reference Output
  • 1-MHz Capable Switching Frequency
  • 1% Accurate Cycle-by-Cycle Overcurrent Protection with Matched Duty Cycle Outputs
  • Programmable Soft-Start and Hiccup Restart Timer
  • Thermally Enhanced 4-mm × 4-mm QFN-20 Package and 20-pin TSSOP Package

The UCC28250 PWM controller is designed for high power density applications that may have stringent prebiased start-up requirements. The integrated synchronous rectifier control outputs target high-efficiency and high-performance topologies such as half-bridge, full-bridge, interleaved forward, and push-pull. The UCC27200 half-bridge drivers and UCC2732X MOSFET drivers used in conjunction with the UCC28250 provide a complete power converter solution.

Externally programmable soft-start, used in conjunction with an internal prebiased start-up circuit, allows the controller to gradually reach a steady-state operating point under all output conditions. The UCC28250 can be configured for primary or secondary-side control and either voltage or current mode control can be implemented.

The oscillator operates at frequencies up to 2 MHz, and can be synchronized to an external clock. Input voltage feedforward, cycle-by-cycle current limit, and a programmable hiccup timer allow the system to stay within a safe operation range. Input voltage, output voltage and temperature protection can be implemented. Dead time between primary-side switch and secondary-side synchronous rectifiers can be independently programmed.

The UCC28250 PWM controller is designed for high power density applications that may have stringent prebiased start-up requirements. The integrated synchronous rectifier control outputs target high-efficiency and high-performance topologies such as half-bridge, full-bridge, interleaved forward, and push-pull. The UCC27200 half-bridge drivers and UCC2732X MOSFET drivers used in conjunction with the UCC28250 provide a complete power converter solution.

Externally programmable soft-start, used in conjunction with an internal prebiased start-up circuit, allows the controller to gradually reach a steady-state operating point under all output conditions. The UCC28250 can be configured for primary or secondary-side control and either voltage or current mode control can be implemented.

The oscillator operates at frequencies up to 2 MHz, and can be synchronized to an external clock. Input voltage feedforward, cycle-by-cycle current limit, and a programmable hiccup timer allow the system to stay within a safe operation range. Input voltage, output voltage and temperature protection can be implemented. Dead time between primary-side switch and secondary-side synchronous rectifiers can be independently programmed.
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技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 UCC28250 Advanced PWM Controller With Prebias Operation 数据表 (Rev. D) PDF | HTML 2015年 6月 28日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
应用手册 Differences Between the UCC28251 and UCC28250 and Evaluation of the UCC28251 in (Rev. A) 2013年 2月 15日
应用手册 如何调整UCC28250打嗝重启时间和逐周期过流保护延迟时间之间的固定比例关系 2012年 1月 13日
EVM 用户指南 Using the UCC28250EVM-564 (Rev. A) 2011年 10月 7日
EVM 用户指南 Using the UCC28250EVM-501 Half Bridge DC-DC Converter with Primary Side Control (Rev. B) 2010年 12月 7日
应用手册 Designing UCC28250 as a Secondary Side Control with a Pre-Bias Condition 2010年 11月 24日

设计和开发

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

UCC28250EVM-501 — 用于初级侧控制中的 UCC28250 高级 PWM 控制器的评估模块

The UCC28250EVM-501 is a fully assembled and tested circuit for evaluating the UCC28250 Advanced PWM Controller with Pre-Bias Operation. The UCC28250EVM-501 comprises a symmetrical half-bridge DC/DC converter, which converts a 36V to 72V DC input to a 3.3V DC output with a maximum 75W output power.
用户指南: PDF
TI.com 上无现货
评估板

UCC28250EVM-564 — 用于在二次侧控制中具有预偏置负载操作的 UCC28250 高级 PWM 控制器的评估模块

UCC28250EVM-564 是一块完全组装且经过测试的电路板，用于评估具有偏预置操作的 UCC28250 高级 PWM 控制器。UCC28250EVM-564 包含一个对称半桥接 DC-DC 转换器，该转换器可以将 36V 至 75V 直流输入电压转换成 3.3V 的直流输出电压，提供 100W 的最大输出功率。
用户指南: PDF
TI.com 上无现货
仿真模型

UCC28250 Unencrypted PSPICE Average Model Package (Rev. A)

SLUM171A.ZIP (96 KB) - PSpice Model
下载
计算工具

SLUC260 — UCC28250 Excel Design Tool

支持的产品和硬件

支持的产品和硬件

产品
交流/直流和直流/直流控制器（外部 FET）
UCC28250 — 支持预偏置模式的高级半桥/全桥 PWM 控制器
下载
参考设计

PMP8878 — 基于 UCC28250 的 1/8 砖型隔离式 DC/DC 电信电源模块

PMP8878 是基于 UCC28250 高级 PWM 控制器的全功能 1/8 砖型隔离式直流/直流电信电源模块。参考设计采用次级侧控制和硬开关全桥电源拓扑，可在 40V-75V 输入源宽范围内运行时提供 12V/180W 输出功率。该参考设计的亮点包括：95% 峰值效率、预偏置启动、过热保护和过流保护（间断模式）。偏置电源块采用 UCC25230，而该设计中采用的闸极驱动器包括用于驱动 SR MOSFET 的 UCC27324 和用于驱动初级侧半桥 MOSFET 的 UCC27201。
测试报告: PDF
原理图: PDF
封装 引脚 CAD 符号、封装和 3D 模型
TSSOP (PW) 20 Ultra Librarian
VQFN (RGP) 20 Ultra Librarian
应遵守 TI 评估类商品的标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

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