SLUSDD4B
April 2019 – December 2020
UC1843B-SP
PRODUCTION DATA
1
Features
2
Applications
3
Description
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
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
UVLO
7.3.2
Reference
7.3.3
Totem-Pole Output
7.4
Device Functional Modes
8
Application Information Disclaimer
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Switching Frequency
8.2.2.2
Transformer
8.2.2.3
RCD Diode Clamp
8.2.2.4
Output Diode
8.2.2.5
Output Filter and Capacitor
8.2.2.6
Compensation
8.2.2.7
Sense Resistor and Slope Compensation
8.2.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Feedback Traces
10.1.2
Input/Output Capacitors
10.1.3
Compensation Components
10.1.4
Traces and Ground Planes
10.2
Layout Example
11
Device and Documentation Support
11.1
Receiving Notification of Documentation Updates
11.2
Support Resources
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
8.2
Typical Application
Figure 8-1
Typical Application Schematic