SLLSFW9 April   2024 ISO7741TA-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1.     Pin Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  Recommended Operating Conditions
    4. 5.4  Thermal Information
    5. 5.5  Power Ratings
    6. 5.6  Insulation Specifications
    7. 5.7  Safety-Related Certifications
    8. 5.8  Safety Limiting Values
    9. 5.9  Electrical Characteristics Transformer
    10. 5.10 Electrical Characteristics—5-V Supply
    11. 5.11 Supply Current Characteristics—5-V Supply
    12. 5.12 Electrical Characteristics—3.3-V Supply
    13. 5.13 Supply Current Characteristics—3.3-V Supply
    14. 5.14 Electrical Characteristics—2.5-V Supply 
    15. 5.15 Supply Current Characteristics—2.5-V Supply
    16. 5.16 Switching Characteristics—5-V Supply
    17. 5.17 Switching Characteristics—3.3-V Supply
    18. 5.18 Switching Characteristics—2.5-V Supply
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Electromagnetic Compatibility (EMC) Considerations
      2. 6.3.2 Push-Pull Converter
      3. 6.3.3 Core Magnetization
    4. 6.4 Device Functional Modes
      1. 6.4.1 Device I/O Schematics
      2. 6.4.2 Start-Up Mode
      3. 6.4.3 Operating Mode
      4. 6.4.4 Spread Spectrum Clocking
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Drive Capability
        2. 7.2.2.2 LDO Selection
        3. 7.2.2.3 Diode Selection
        4. 7.2.2.4 Capacitor Selection
        5. 7.2.2.5 Transformer Selection
          1. 7.2.2.5.1 V-t Product Calculation
          2. 7.2.2.5.2 Turns Ratio Estimate
          3. 7.2.2.5.3 Recommended Transformers
      3. 7.2.3 Application Curve
        1. 7.2.3.1 Insulation Lifetime
      4. 7.2.4 System Examples
        1. 7.2.4.1 Higher Output Voltage Designs
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DW|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5.9 Electrical Characteristics Transformer

over full-range of recommended operating conditions, unless otherwise noted. All typical values are at TA = 25°C, VCC = 5 V.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
CLK
FSW D1, D2 average switching Frequency (ISO7741TA-Q1) RL = 50Ω to VCC; 138 160 203 kHz
D1, D2 average switching Frequency (ISO7741TB-Q1) RL = 50Ω to VCC . 363 424 517 kHz
OUTPUT STAGE
DMM Average ON time mismatch between D1 and D2 RL = 50Ω 0%
R(ON) Output switch on resistance VCC = 4.5V, ID1, ID2 = 700mA 0.22 0.4 Ω
VCC = 2.8V, ID1, ID2 = 700mA 0.24 0.45 Ω
VCC = 2.25V, ID1, ID2 = 0.5 A 0.26 0.5 Ω
V(SLEW) Voltage slew rates on D1 and D2 for ISO7741TA-Q1 RL = 50 Ω to VCC 48 V/µs
I(SLEW) Current slew rates at D1 and D2 for ISO7741TA-Q1 RL = 5 Ω through transformer 11 A/µs
V(SLEWHF) Voltage slew rates on D1 and D2 for ISO7741TB-Q1 RL = 50 Ω to VCC  152 V/µs
I(SLEWHF) Current slew rates at D1 and D2 for ISO7741TB-Q1 RL = 5 Ω through transformer
 41 A/µs
ILIM Current clamp limit (2.8V < VCC ≤ 5.5V ) 1.42 1.75 2.15 A
Current clamp limit (2.25V ≤ VCC ≤ 2.8V) 0.65 1.85 A
THERMAL SHUT DOWN
TSD+ TSD turn on temperature 154 168 181 °C
TSD- TSD turn off temperature 135 150 166 °C
TSD- TSD hysteresis 13 17 °C