UCC28220
- 2-MHz High-Frequency Oscillator With 1-MHz Operation Per Channel
- Matched Internal Slope Compensation Circuits
- Programmable Maximum Duty Cycle Clamp 60% to 90% Per Channel
- Peak Current Mode Control With Cycle-by-Cycle Current Limit
- Current Sense Discharge Transistor for Improved Noise Immunity
- Accurate Line Undervoltage and Overvoltage Sense With Programmable Hysteresis
- Opto-Coupler Interface
- 110-V Internal Start-Up JFET (UCC28221)
- Operates From 12-V Supply (UCC28220)
- Programmable Soft Start
The UCC28220 and UCC28221 are a family of BiCMOS interleaved dual channel PWM controllers. Peak current mode control is used to ensure current sharing between the two channels. A precise maximum duty cycle clamp can be set to any value between 60% and 90% duty cycle per channel.
The UCC28220 has an UVLO turnon threshold of
10 V for use in 12-V supplies while UCC28221 has a turnon threshold of 13 V for systems
needing wider UVLO hysteresis. Both have 8-V turnoff thresholds.
Additional features include a programmable internal slope compensation with a special circuit which is used to ensure exactly the same slope is added to each channel and a high-voltage 110-V internal JFET for easier start-up for the wider hysteresis UCC28221 version.
The UCC28220 is available in both 16-pin SOIC and low-profile TSSOP packages. The UCC28221 also comes in 16-pin SOIC package and a slightly larger 20-pin TSSOP package to allow for high-voltage pin spacing to meet UL1950 creepage clearance safety requirements.
技术文档
| 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 | UCC2822x Interleaved Dual PWM Controller With Programmable Max Duty Cycle 数据表 (Rev. G) | PDF | HTML | 2017-4-6 | ||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 应用手册 | 350-W, Two Phase Interleaved PFC Pre-Regulator (Rev. C) | 2013-9-20 | ||||
| 用户指南 | 350-W Interleaved PFC Pre-Regulator | 2005-8-29 | ||||
| 更多文献资料 | Seminar 400 Topic 2 - Design of Flyback Transformers and Filter Inductors | 2001-2-15 | ||||
| 更多文献资料 | Seminar 300 Topic 8 - Switching Power Supply Design Review | 2001-2-15 |
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）。
UCC28221-CALC — UCC28221 MathCAD 计算实用程序
This Mathcad design tool was developed to use with the UCC28221 application note SLUA312.
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
| SOIC (D) | 16 | Ultra Librarian |
订购和质量
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