SNVSB07C
July 2018 – April 2019
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
Typical Application
Typical Efficiency, VOUT = 5 V
4
Revision History
5
Pin Configuration and Functions
Pin 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
Integrated Power MOSFET
7.3.2
PSR Flyback Modes of Operation
7.3.3
Setting the Output Voltage
7.3.3.1
Diode Thermal Compensation
7.3.4
Control Loop Error Amplifier
7.3.5
Precision Enable
7.3.6
Configurable Soft Start
7.3.7
External Bias Supply
7.3.8
Minimum On-Time and Off-Time
7.3.9
Overcurrent Protection
7.3.10
Thermal Shutdown
7.4
Device Functional Modes
7.4.1
Shutdown Mode
7.4.2
Standby Mode
7.4.3
Active Mode
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
Design 1: Wide VIN, Low IQ PSR Flyback Converter Rated at 5 V, 1 A
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
Custom Design With Excel Quickstart Tool
8.2.1.2.3
Flyback Transformer – T1
8.2.1.2.4
Flyback Diode – DFLY
8.2.1.2.5
Zener Clamp Circuit – DF, DCLAMP
8.2.1.2.6
Output Capacitor – COUT
8.2.1.2.7
Input Capacitor – CIN
8.2.1.2.8
Feedback Resistor – RFB
8.2.1.2.9
Thermal Compensation Resistor – RTC
8.2.1.2.10
UVLO Resistors – RUV1, RUV2
8.2.1.2.11
Soft-Start Capacitor – CSS
8.2.1.3
Application Curves
8.2.2
Design 2: PSR Flyback Converter With Dual Outputs of 15 V and –7.7 V at 200 mA
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.2.1
Flyback Transformer – T1
8.2.2.2.2
Flyback Diodes – DFLY1 and DFLY2
8.2.2.2.3
Input Capacitor – CIN
8.2.2.2.4
Feedback Resistor – RFB
8.2.2.2.5
UVLO Resistors – RUV1, RUV2
8.2.2.3
Application Curves
8.2.3
Design 3: PSR Flyback Converter With Stacked Dual Outputs of 24 V and 5 V
8.2.3.1
Design Requirements
8.2.3.2
Detailed Design Procedure
8.2.3.2.1
Flyback Transformer – T1
8.2.3.2.2
Feedback Resistor – RFB
8.2.3.2.3
UVLO Resistors – RUV1, RUV2
8.2.3.3
Application Curves
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Examples
11
Device and Documentation Support
11.1
Device Support
11.1.1
Third-Party Products Disclaimer
11.1.2
Development Support
11.1.3
Custom Design With WEBENCH® Tools
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Receiving Notification of Documentation Updates
11.4
Community Resources
11.5
Trademarks
11.6
Electrostatic Discharge Caution
11.7
Glossary
12
Mechanical, Packaging, and Orderable Information
11.2.1
Related Documentation
For related documentation see the following:
LM5180EVM-S05 EVM User's Guide
(SNVU592)
LM5180EVM-DUAL EVM User's Guide
(SNVU609)
Under the Hood of Flyback SMPS Designs
(SLUP261)
Flyback Transformer Design Considerations for Efficiency and EMI
(SLUP338)
TI Designs:
Isolated IGBT Gate-Drive Power Supply Reference Design With Integrated Switch PSR Flyback Controller
Compact, Efficient, 24-V Input Auxiliary Power Supply Reference Design for Servo Drives
Reference Design for Power-Isolated Ultra-Compact Analog Output Module
HEV/EV Traction Inverter Power Stage with 3 Types of IGBT/SiC Bias-Supply Solutions Reference Design
4.5-V to 65-V Input, Compact Bias Supply With Power Stage Reference Design for IGBT/SiC Gate Drivers
TI Blogs:
Flyback Converters: Two Outputs are Better Than One
Common Challenges When Choosing the Auxiliary Power Supply for Your Server PSU
Maximizing PoE PD Efficiency on a Budget
White Papers:
Valuing Wide VIN, Low EMI Synchronous Buck Circuits for Cost-driven, Demanding Applications
(SLYY104)
An Overview of Conducted EMI Specifications for Power Supplies
(SLYY136)
An Overview of Radiated EMI Specifications for Power Supplies
(SLYY142)
AN-2162: Simple Success with Conducted EMI from DC-DC Converters
(SNVA489)
Automotive Cranking Simulator User's Guide
(SLVU984)
Using New Thermal Metrics
(SBVA025)
Semiconductor and IC Package Thermal Metrics
(SPRA953)