ZHCS779B March 2012 – December 2023 UCC28070A
PRODUCTION DATA
- 1
- 1 特性
- 2 应用
- 3 说明
- 4 Pin Configuration and Functions
- 5 Specifications
-
6 Detailed Description
- 6.1 Overview
- 6.2 Functional Block Diagram
- 6.3
Feature Description
- 6.3.1 Interleaving
- 6.3.2 Programming the PWM Frequency and Maximum Duty-Cycle Clamp
- 6.3.3 Frequency Dithering (Magnitude and Rate)
- 6.3.4 External Clock Synchronization
- 6.3.5 Multi-phase Operation
- 6.3.6 VSENSE and VINAC Resistor Configuration
- 6.3.7 VSENSE and VINAC Open-Circuit Protection
- 6.3.8 Current Synthesizer
- 6.3.9 Programmable Peak Current Limit
- 6.3.10 Linear Multiplier and Quantized Voltage Feed Forward
- 6.3.11 Enhanced Transient Response (VA Slew-Rate Correction)
- 6.3.12 Voltage Biasing (VCC and VVREF)
- 6.3.13 PFC Enable and Disable
- 6.3.14 Adaptive Soft Start
- 6.3.15 PFC Start-Up Hold Off
- 6.3.16 Output Overvoltage Protection (OVP)
- 6.3.17 Zero-Power Detection
- 6.3.18 Thermal Shutdown
- 6.3.19 Current Loop Compensation
- 6.3.20 Voltage Loop Compensation
- 6.4 Device Functional Modes
-
7 Application and Implementation
- 7.1 Application Information
- 7.2
Typical Application
- 7.2.1 Design Requirements
- 7.2.2
Detailed Design Procedure
- 7.2.2.1 Output Current Calculation
- 7.2.2.2 Bridge Rectifier
- 7.2.2.3 PFC Inductor (L1 and L2)
- 7.2.2.4 PFC MOSFETs (M1 and M2)
- 7.2.2.5 PFC Diode
- 7.2.2.6 PFC Output Capacitor
- 7.2.2.7 Current-Loop Feedback Configuration (Sizing of the Current-Transformer Turns-Ratio and Sense Resistor (RS))
- 7.2.2.8 Current-Sense Offset and PWM Ramp for Improved Noise Immunity
- 7.2.3 Application Curves
- 7.3 Power Supply Recommendations
- 7.4 Layout
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
3 说明
UCC28070A 器件是 UCC28070 器件的扩展频率范围衍生米6体育平台手机版_好二三四，能够在大功率应用中基于 IGBT 功率开关的 PFC 转换器所需的低开关频率下工作。
UCC28070A 器件能够在 10kHz 至 300kHz 的频率范围内运行，相比最小运行频率被限制为 30kHz 的 UCC28070 器件，扩展了运行范围。UCC28070A 器件也提供了 UCC28070 器件的所有其他特性和优势。180° 异相交错操作可大幅减少输入和输出端的波纹电流，这使得器件能够以更低的成本轻松滤除传导电磁干扰 (EMI)。
与 UCC28070 器件一样，UCC28070A 器件也具有多项创新功能，包括电流合成和量化电压前馈，以促进 PF、效率、THD 和瞬态响应方面的性能增强。频率抖动、时钟同步和压摆率增强等功能进一步扩大了性能增强的潜力。UCC28070A 器件中也提供了 UCC28070 器件中的所有保护功能，例如输出过压检测、可编程峰值电流限制、欠压锁定和开环保护。
器件信息
| 器件型号 | 封装 | 封装尺寸（标称值） |
|---|---|---|
| UCC28070A | TSSOP (20) | 6.50mm x 4.40mm |
简化版应用示意图