SLVS037O September   1989  – December 2020 TL7702B , TL7705B , TL7733B

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics: TL77xxBC, TL77xxBI, and TL7705BQ
    6. 6.6 Switching Characteristics: TL77xxBC, TL77xxBI, and TL7705BQ
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Wide Supply-Voltage Range
      2. 8.3.2 Adjustable Pulse Duration
    4. 8.4 Device Functional Modes
  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
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
  • P|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3.2 Adjustable Pulse Duration

The CT pin enables the ability to set a user-defined time delay in order to ensure that the fault condition is recognized. The external capacitor charges based on an internal current source until the voltage at the CT pin exceeds that of the internal reference voltage.

The time delay is determined by the value of the external capacitor CT : td ≈ 2.6 × 104 × CT , where CT is in farads (F) and td is in seconds (s).

The current source to charge the timing capacitor varies ±15%. Reference Voltage 2 is approximately 1.8 V and varies approximately ±5%. Once the timing capacitor charges, it discharges to about 0.6 V, not completely to 0 V.