ZHCS812K
January 2012 – August 2021
LM5017
PRODUCTION DATA
1
特性
2
应用
3
描述
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Timing Requirements
6.7
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Control Overview
7.3.2
VCC Regulator
7.3.3
Regulation Comparator
7.3.4
Overvoltage Comparator
7.3.5
On-Time Generator
7.3.6
Current Limit
7.3.7
N-Channel Buck Switch and Driver
7.3.8
Synchronous Rectifier
7.3.9
Undervoltage Detector
7.3.10
Thermal Protection
7.3.11
Ripple Configuration
7.3.12
Soft-Start
7.4
Device Functional Modes
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Application Circuit: 12.5-V to 95-V Input and 10-V, 600-mA Output Buck Converter
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Custom Design with WEBENCH Tools
8.2.1.2.2
RFB1, RFB2
8.2.1.2.3
Frequency Selection
8.2.1.2.4
Inductor Selection
8.2.1.2.5
Output Capacitor
8.2.1.2.6
Type III Ripple Circuit
8.2.1.2.7
VCC and Bootstrap Capacitors
8.2.1.2.8
Input Capacitor
8.2.1.2.9
UVLO Resistors
8.2.1.3
Application Curves
8.2.2
Isolated DC/DC Converter Using LM5017
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.2.1
Transformer Turns Ratio
8.2.2.2.2
Total IOUT
8.2.2.2.3
RFB1, RFB2
8.2.2.2.4
Frequency Selection
8.2.2.2.5
Transformer Selection
8.2.2.2.6
Primary Output Capacitor
8.2.2.2.7
Secondary Output Capacitor
8.2.2.2.8
Type III Feedback Ripple Circuit
8.2.2.2.9
Secondary Diode
8.2.2.2.10
VCC and Boostrap Capacitor
8.2.2.2.11
Input Capacitor
8.2.2.2.12
UVLO Resistors
8.2.2.2.13
VCC Diode
8.2.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
第三方产品免责声明
11.1.2
Development Support
11.1.2.1
Custom Design With WEBENCH® Tools
11.2
Documentation Support
11.2.1
Related Documentation
11.3
接收文档更新通知
11.4
支持资源
11.5
Trademarks
11.6
静电放电警告
11.7
术语表
12
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
DDA|8
MPDS092F
NGU|8
MPDS407A
散热焊盘机械数据 (封装 | 引脚)
DDA|8
PPTD058I
订购信息
zhcs812k_oa
zhcs812k_pm