ZHCSIB2B
December 2017 – October 2019
UCC28064A
PRODUCTION DATA.
1
特性
2
应用
3
说明
Device Images
简化应用
4
修订历史记录
5
说明 (续)
6
Pin Configuration and Functions
Pin Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Principles of Operation
8.3.2
Natural Interleaving
8.3.3
On-Time Control, Maximum Frequency Limiting, Restart Timer and Input Voltage Feed-Forward compensation
8.3.4
Distortion Reduction
8.3.5
Zero-Current Detection and Valley Switching
8.3.6
Phase Management and Light-Load Operation
8.3.7
Burst Mode Operation
8.3.8
External Disable
8.3.9
Improved Error Amplifier
8.3.10
Soft Start
8.3.11
Brownout Protection
8.3.12
Line Dropout Detection
8.3.13
VREF
8.3.14
VCC
8.3.15
System Level Protections
8.3.15.1
Failsafe OVP - Output Over-voltage Protection
8.3.15.2
Overcurrent Protection
8.3.15.3
Open-Loop Protection
8.3.15.4
VCC Undervoltage Lock-Out (UVLO) Protection
8.3.15.5
Phase-Fail Protection
8.3.15.6
CS - Open, TSET - Open and Short Protection
8.3.15.7
Thermal Shutdown Protection
8.3.15.8
Fault Logic Diagram
8.4
Device Functional Modes
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Custom Design With WEBENCH® Tools
9.2.2.2
Inductor Selection
9.2.2.3
ZCD Resistor Selection RZA, RZB
9.2.2.4
HVSEN
9.2.2.5
Output Capacitor Selection
9.2.2.6
Selecting RS For Peak Current Limiting
9.2.2.7
Power Semiconductor Selection (Q1, Q2, D1, D2)
9.2.2.8
Brownout Protection
9.2.2.9
Converter Timing
9.2.2.10
Programming VOUT
9.2.2.11
Voltage Loop Compensation
9.2.3
Application Curves
9.2.3.1
Input Ripple Current Cancellation with Natural Interleaving
9.2.3.2
Brownout Protection
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Package Option Addendum
12.1
Packaging Information
13
器件和文档支持
13.1
器件支持
13.1.1
开发支持
13.1.1.1
使用 WEBENCH® 工具创建定制设计
13.2
文档支持
13.2.1
相关文档
13.3
接收文档更新通知
13.4
社区资源
13.5
商标
13.6
静电放电警告
13.7
Glossary
14
机械、封装和可订购信息
8.3.15
System Level Protections