UCC28521 具有 TEM/TEM 调制的高级 PWM/PFC 组合控制器
|
UCC28521 |
| UVLO Thresholds On/Off(V) |
10.2/9.7 |
| Operating Supply(Max)(V) |
18 |
| Startup Current(mA) |
0.1 |
| Operating Supply Current(mA) |
4 |
| Practical Operating Frequency(Max)(MHz) |
0.5 |
| Pin/Package |
20SOIC |
| Rating |
Catalog |
UCC28521 描述
The UCC28521 and UCC28528 combination PFC/PWM controllers provide complete control functionality for any off-line power system requiring compliance with the IEC1000-3-2 harmonic reduction requirements. By combining the control and drive signals for the PFC and the PWM stages into a single device, significant performance and cost benefits are gained.
Based on the UCC28511, the new devices employ an average current mode control architecture with input voltage feedforward. The major difference of the UCC28521/28 is the trailing-edge / trailing-edge (TEM/TEM) modulation scheme for the PFC/PWM stages. The UCC28528 differs from the UCC28521 as its PWM stage does not turn off with the falling bulk voltage. The UCC28528 PWM was designed for low power auxiliary supplies.
UCC28521 特性
- Provides Control of PFC and PWM Power Stages In One Device
- Trailing-Edge PFC, Trailing-Edge PWM Modulation
- Built-In Sequencing of PFC and PWM Turn-On
- 2-A Source and 3-A Sink Gate Drive for Both PFC and PWM Stages
- Typical 16-ns Rise Time and 7-ns Fall Time into 1-nF Loads
- PFC Features
- Average-Current-Mode Control for Continuous Conduction Mode Operation
- Highly-Linear Multiplier for Near-Unity Power Factor
- Input Voltage Feedforward Implementation
- Improved Load Transient Response
- Accurate Power Limiting
- Zero Power Detect
- PWM Features
- Peak-Current-Mode Control Operation
- 1:1 PFC:PWM Frequency Option
- Programmable maximum Duty Cycle Limit Up to 90%
- Programmable Soft-Start
- APPLICATIONS
- High-Efficiency Server and Desktop Supplies
- High-Efficiency Telecom AC-DC Converter
UCC28521 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| UCC28521DW |
ACTIVE |
-40 to 85 |
2.35 | 1ku |
SOIC (DW) | 20 |
25 | TUBE |
UCC28521DW |
| UCC28521DWG4 |
ACTIVE |
-40 to 85 |
2.35 | 1ku |
SOIC (DW) | 20 |
25 | TUBE |
UCC28521DW |
| UCC28521DWR |
ACTIVE |
-40 to 85 |
2.35 | 1ku |
SOIC (DW) | 20 |
2000 | LARGE T&R |
UCC28521DW |
| UCC28521DWRG4 |
ACTIVE |
-40 to 85 |
2.35 | 1ku |
SOIC (DW) | 20 |
2000 | LARGE T&R |
UCC28521DW |
UCC28521 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| UCC28521DW |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
UCC28521DW |
| UCC28521DWG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC28521DWG4 |
UCC28521DWG4 |
| UCC28521DWR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
|
UCC28521DWR |
| UCC28521DWRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
UCC28521DWRG4 |
UCC28521DWRG4 |
UCC28521 应用技术支持与电子电路设计开发资源下载
- UCC28521 数据资料 dataSheet 下载.PDF
- TI 德州仪器AC/DC 和 DC/DC 电源产品选型与价格参考 . xls
- Dual MOSFET Driver
(PDF 498 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF
1305 KB)
- Analog-to-Digital Converter Grounding Practices Affect System
Performance (PDF 56 KB)
- Principles of Data Acquisition and Conversion (PDF 50 KB)
- Interleaving Analog-to-Digital Converters (PDF 64 KB)
- What
Designers Should Know About Data Converter Drift (PDF 95 KB)
- Giving Delta-Sigma Converters a Gain Boost with a Front End
Analog Gain Stage (PDF 70 KB)
- Programming Tricks for Higher Conversion Speeds Utilizing Delta
Sigma Converters (PDF 105 KB)
UCC28521 工具与软件