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SN6505x Low-Noise 1-A Transformer Drivers for Isolated Power Supplies
SLLSEP9I
september 2015 – august 2023
SN6505A
,
SN6505B
PRODUCTION DATA
CONTENTS
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SN6505x Low-Noise 1-A Transformer Drivers for Isolated Power Supplies
1
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
Timing Requirements
6.7
Typical Characteristics, SN6505A
6.8
Typical Characteristics, SN6505B
7
Parameter Measurement Information
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Push-Pull Converter
8.3.2
Core Magnetization
8.4
Device Functional Modes
8.4.1
Start-Up Mode
8.4.1.1
Soft-Start
8.4.2
Operating Mode
8.4.3
Shutdown-Mode
8.4.4
Spread Spectrum Clocking
8.4.5
External Clock Mode
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
Drive Capability
9.2.2.2
LDO Selection
9.2.2.3
Diode Selection
9.2.2.4
Capacitor Selection
9.2.2.5
Transformer Selection
9.2.2.5.1
V-t Product Calculation
9.2.2.5.2
Turns Ratio Estimate
9.2.2.5.3
Recommended Transformers
9.2.3
Application Curves
9.2.4
System Examples
9.2.4.1
Higher Output Voltage Designs
9.2.4.2
Application Circuits
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.2
Documentation Support
12.2.1
Related Documentation
12.3
Related Links
12.4
Receiving Notification of Documentation Updates
12.5
Community Resources
12.6
Trademarks
13
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DBV|6
MPDS026Q
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sllsep9i_oa
sllsep9i_pm
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Data Sheet
SN6505x
Low-Noise 1-A Transformer Drivers for Isolated Power Supplies