SLVSC25B July   2013  – June 2017 TPS61197

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 Switching Characteristics
    7. 6.7 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 Supply Voltage
      2. 7.3.2 Boost Controller
      3. 7.3.3 Switching Frequency
      4. 7.3.4 Enable and Undervoltage Lockout
      5. 7.3.5 Power-Up Sequencing and Soft Start-up
      6. 7.3.6 Current Regulation
      7. 7.3.7 PWM Dimming
      8. 7.3.8 Indication for Fault Conditions
    4. 7.4 Device Functional Modes
      1. 7.4.1 Protections
        1. 7.4.1.1 Switch Current Limit Protection Using the ISNS Pin
        2. 7.4.1.2 LED Open Protection
        3. 7.4.1.3 Schottky Diode Open Protection
        4. 7.4.1.4 Schottky Diode Short Protection
        5. 7.4.1.5 IFB Overvoltage Protection
        6. 7.4.1.6 Output Overvoltage Protection Using the OVP Pin
        7. 7.4.1.7 IFB Short-to-Ground Protection
        8. 7.4.1.8 Thermal Shutdown
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Simple Boost Converter
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Inductor Selection
          2. 8.2.1.2.2 Output Capacitor
          3. 8.2.1.2.3 Schottky Diode
          4. 8.2.1.2.4 Switch MOSFET and Gate Driver Resistor
          5. 8.2.1.2.5 Current Sense and Current Sense Filtering
          6. 8.2.1.2.6 Loop Consideration
        3. 8.2.1.3 Application Curves
      2. 8.2.2 PWM Dimming Controlled by Boost Converter
      3. 8.2.3 High Boost Ratio Application
  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 Receiving Notification of Documentation Updates
    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

5 Pin Configuration and Functions

D Package
16-Pin SOIC
Top View
TPS61197 PO_lvsc25.gif

Pin Functions

PIN TYPE DESCRIPTION
NO. NAME
1 UVLO I Low input undervoltage lockout. Use a resister divider from VIN to this pin to set the UVLO threshold.
2 EN I Device enable and disable control input. EN pin high voltage enables the device. EN pin low voltage disables the device.
3 PWM I PWM dimming signal input. The frequency of the PWM signal is in the range of 90 Hz to 22 kHz.
4 AGND G Analog ground
5 REF O Internal reference voltage for the boost converter. Use a capacitor at this pin to adjust the soft-start time.
6 COMP O Loop compensation for the boost converter. Connect a RC network to make loop stable
7 IFB I Regulated current sink input pin. A resistor on this pin is used to set a desired string current.
8 IDRV O PWM dimming output control pin to drive the external MOSFET or bipolar transistor
9 ISNS I External switch MOSFET current sense positive input
10 OVP I Overvoltage protection detection input. Connect a resistor divider from output to this pin to program the OVP threshold. In addition, this pin is also the feedback of the output voltage of the boost converter.
11 PGND G External MOSFET current sense ground input
12 GDRV O Gate driver output for the external switch MOSFET
13 VDD O Internal regulator output for device power supply. Connect a ceramic capacitor of more than 1 µF to this pin.
14 FSW O Boost switching frequency setting pin. Use a resistor to set the frequency from 50 kHz to 800 kHz.
15 FAULT O Fault indicator. Open-drain output. Output high impedance when fault conditions happen.
16 VIN I Power supply input pin