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  • SN6501-Q1 Transformer Driver for Isolated Power Supplies

    • SLLSEF3C June   2013  – March 2021 SN6501-Q1

      PRODUCTION DATA  

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  • SN6501-Q1 Transformer Driver for Isolated Power Supplies
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 15
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Push-Pull Converter
      2. 8.3.2 Core Magnetization
    4. 8.4 Device Functional Modes
      1. 8.4.1 Start-Up Mode
      2. 8.4.2 Operating Mode
      3. 8.4.3 Off-Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 SN6501 Drive Capability
        2. 9.2.2.2 LDO Selection
        3. 9.2.2.3 Diode Selection
        4. 9.2.2.4 Capacitor Selection
        5. 9.2.2.5 Transformer Selection
          1. 9.2.2.5.1 V-t Product Calculation
          2. 9.2.2.5.2 Turns Ratio Estimate
          3. 9.2.2.5.3 Recommended Transformers
      3. 9.2.3 Application Curve
      4. 9.2.4 Higher Output Voltage Designs
      5. 9.2.5 Application Circuits
  10. 10Power Supply Recommendations
    1. 10.1 43
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
  14. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • DBV|5
    • MPDS018T
Thermal pad, mechanical data (Package|Pins)
Orderable Information
  • sllsef3c_oa
  • sllsef3c_pm
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DATA SHEET

SN6501-Q1 Transformer Driver for Isolated Power Supplies

1 Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C4B
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • Push-Pull Driver for Small Transformers
  • Single 3.3-V or 5-V Supply
  • High Primary-side Current Drive:
    • 5-V Supply: 350 mA (Max)
    • 3.3-V Supply: 150 mA (Max)
  • Low Ripple on Rectified Output Permits Small Output Capacitors
  • Small 5-Pin SOT-23 Package

2 Applications

  • Isolated Interface Power Supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, Low-Power LAN
  • Industrial Automation
  • Process Control
  • Medical Equipment

3 Description

The SN6501-Q1 is a monolithic oscillator/power-driver, specifically designed for small form factor, isolated power supplies in isolated interface applications. The device drives a low-profile, center-tapped transformer primary from a 3.3-V or 5-V DC power supply. The secondary can be wound to provide any isolated voltage based on transformer turns ratio.

The SN6501-Q1 consists of an oscillator followed by a gate drive circuit that provides the complementary output signals to drive the ground referenced N-channel power switches. The internal logic ensures break-before-make action between the two switches.

The SN6501-Q1 is available in a small SOT-23 (5) package, and is specified for operation at temperatures from –40°C to 125°C.

Device Information
PART NUMBER(1)PACKAGEBODY SIZE (NOM)
SN6501-Q1SOT-23 (5)2.90 mm x 1.60 mm
(1) For all available packages, see the orderable addendum at the end of the datasheet.
GUID-10EC4019-83A6-4869-98B6-EC2C7063E86F-low.gifSimplified Schematic
GUID-F3FCB645-59D0-4091-9705-1DE80569A6EA-low.gifOutput Voltage and Efficiency vs Output Current

4 Revision History

Changes from Revision B (October 2020 ) to Revision C (March 2021)

  • Added a short-circuit protection note to SN6501 Drive Capability Go
  • Changed Equation 4 Go
  • Removed duplicate equation labeled as (5) in Revision BGo
  • Added 17 line items to Recommended Isolation Transformers Optimized for SN6501 Go

Changes from Revision A (September 2014) to Revision B (October 2020)

  • Added Functional Safety BulletsGo

Changes from Revision * (June 2013) to Revision A (September 2014)

  • Added Pin Configuration and Functions section, Handling Rating table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go
  • Changed Equation 10 Go
  • Changed Equation 11 Go
  • Changed Table 9-4, From: Wuerth-Elektronik / Midcom To: Wurth Electronics Midcom IncGo
  • Changed Figure 9-16 Go

 
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