SLVSA85E June   2010  – December 2016 TPS61187

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
      1. 6.6.1 Table Of Graphs
  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 Regulator and Programmable Switch Frequency (FSCLT)
      3. 7.3.3 LED Current Sinks
      4. 7.3.4 Enable and Start-up
      5. 7.3.5 IFB Pin Unused
    4. 7.4 Device Functional Modes
      1. 7.4.1 Brightness Dimming Control
      2. 7.4.2 Adjustable PWM Dimming Frequency and Mode Selection (R_FPWM/MODE)
      3. 7.4.3 Mode Selection - Phase-Shift PWM Or Direct PWM Dimming
        1. 7.4.3.1 Phase-Shift PWM Dimming
        2. 7.4.3.2 Direct PWM Dimming
      4. 7.4.4 Overvoltage Clamp and Voltage Feedback (OVC / FB)
      5. 7.4.5 Current-Sink Open Protection
      6. 7.4.6 Overcurrent and Short-Circuit Protection
      7. 7.4.7 Thermal Protection
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Inductor Selection
        2. 8.2.2.2 Output Capacitor Selection
        3. 8.2.2.3 Isolation FET Selection
      3. 8.2.3 Application Curves
  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 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 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

RTJ Package
20-Pin QFN With Thermal Pad
Top View
TPS61187 po_lvsa85.gif

Pin Functions

PIN TYPE DESCRIPTION
NO. NAME
1 VDDIO A Internal pre-regulator. Connect a 1-µF ceramic capacitor to VDDIO.
2 EN I Enable
3 FSLCT I Switching frequency selection pin. Use a resistor to set the frequency between 300 kHz to 1 MHz.
4 ISET I Full-scale LED current set pin. Connecting a resistor to the pin programs the current level.
5 FPO O Fault protection output to indicate fault conditions including OVP, OC, and OT.
6, 7, 8,
10,11,12		 IFB1 to IFB6 A Regulated current sink input pins
9, GND G Analog ground
13 RFPWM / MODE I Dimming frequency program pin with an external resistor / mode selection, see(1)
14 OVC A Overvoltage clamp pin / voltage feedback, see(1)
15 PGND G Power ground
16 SW A Drain connection of the internal power FET
17 NC — No connection
18 FAULT O Fault pin to drive external ISO FET
19 VIN A Supply input pin
20 PWM I PWM signal input pin
— Thermal Pad — Connect to GND plane for better thermal performance.
A: Analog; G: Ground; I: Input: O: Output; P: Power
(1) See Application and Implementation for details.