SLVSCD1C December   2013  – November 2015 TPS92561

PRODUCTION DATA.  

  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 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Basics of Operation
      2. 7.3.2 Sample Scope Capture
      3. 7.3.3 Output Current Control (ADJ, SEN)
      4. 7.3.4 Overcurrent Protection
      5. 7.3.5 Overvoltage Protection (OVP)
      6. 7.3.6 VCC Bias Supply and Start-Up
      7. 7.3.7 VCC and VP Connection
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Setting the Output Current
      2. 8.1.2 Selecting an Inductance
      3. 8.1.3 Important Design Consideration: Diode in Parallel With Sense Resistance
      4. 8.1.4 Gate Driver Operation
      5. 8.1.5 Output Bulk Capacitor
      6. 8.1.6 Phase Dimming
      7. 8.1.7 Example Circuits
    2. 8.2 Typical Applications
      1. 8.2.1 Offline Boost Schematic for Design Example
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Set the LED Current
            1. 8.2.1.2.1.1 Calculate ADJ Pin Resistors
            2. 8.2.1.2.1.2 Calculate the Current Sense Resistor
            3. 8.2.1.2.1.3 Calculate the SEN Pin Series Resistance
          2. 8.2.1.2.2 Calculate OVP Pin Resistors
          3. 8.2.1.2.3 Calculate Inductor Value and Ripple Current
          4. 8.2.1.2.4 Calculate the Output Capacitor Value
      2. 8.2.2 11-W, 120-VAC Input, 225-V Output, Offline Boost Design Example
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Set the LED Current
            1. 8.2.2.2.1.1 Calculate ADJ Pin Resistors
            2. 8.2.2.2.1.2 Calculate the Current Sense Resistor
            3. 8.2.2.2.1.3 Calculate the SEN Pin Series Resistance
          2. 8.2.2.2.2 Calculate OVP Pin Resistors
          3. 8.2.2.2.3 Calculate Inductor Value and Ripple Current
          4. 8.2.2.2.4 Calculate the Output Capacitor Value
        3. 8.2.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

10 Layout

10.1 Layout Guidelines

The VP input capacitor, OVP resistors, and ADJ resistors/capacitor should be placed as close to the IC as possible. The VCC capacitor, GATE resistor, and SEN capacitor should also be placed close to the device. Minimize the switching node area (connection between Q, L, and D) and keep the discontinuous current switching path as short as possible. This includes the loop formed by Q, RSENSE, and the diode D. The ground connections for the TPS92561, the SEN filter capacitor, and RSENSE should all be tide closely together with a solid ground plane.

10.2 Layout Example

TPS92561 slvscd1_layout.gif Figure 20. Layout Recommendation