SNVSAE9D January   2016  – May 2017 TPS61194-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics
    6. 7.6  Internal LDO Electrical Characteristics
    7. 7.7  Protection Electrical Characteristics
    8. 7.8  Current Sinks Electrical Characteristics
    9. 7.9  PWM Brightness Control Electrical Characteristics
    10. 7.10 Boost and SEPIC Converter Characteristics
    11. 7.11 Logic Interface Characteristics
    12. 7.12 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Integrated DC-DC Converter
      2. 8.3.2 Internal LDO
      3. 8.3.3 LED Current Sinks
        1. 8.3.3.1 Output Configuration
        2. 8.3.3.2 Current Setting
        3. 8.3.3.3 Brightness Control
      4. 8.3.4 Protection and Fault Detections
        1. 8.3.4.1 Adaptive DC-DC Voltage Control and Functionality of LED Fault Comparators
        2. 8.3.4.2 Overview of the Fault/Protection Schemes
    4. 8.4 Device Functional Modes
      1. 8.4.1 Device States
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical Application for 4 LED Strings
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Inductor Selection
          2. 9.2.1.2.2 Output Capacitor Selection
          3. 9.2.1.2.3 Input Capacitor Selection
          4. 9.2.1.2.4 LDO Output Capacitor
          5. 9.2.1.2.5 Diode
        3. 9.2.1.3 Application Curves
      2. 9.2.2 SEPIC Mode Application
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
          1. 9.2.2.2.1 Inductor
          2. 9.2.2.2.2 Diode
          3. 9.2.2.2.3 Capacitor C1
        3. 9.2.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

6 Pin Configuration and Functions

PWP Package
20-Pin HTSSOP With Exposed Thermal Pad
Top View
TPS61194-Q1 pinout_SNVSAE9.gif

Pin Functions

PIN TYPE(1) DESCRIPTION
NO. NAME
1 VIN A Input power pin
2 LDO A Output of internal LDO; connect a 1-μF decoupling capacitor between this pin and noise-free GND.
3 FSET A DC-DC (boost or SEPIC) switching frequency setting resistor; for normal operation, resistor value from 24 kΩ to 219 kΩ must be connected between this pin and ground.
4 VDDIO/EN I Enable input for the device as well as supply input (VDDIO) for digital pins
5 FAULT OD Fault signal output. If unused, the pin may be left floating.
6 SYNC I Input for synchronizing boost. If synchronization is not used, connect this pin to GND to disable spread spectrum or to VDDIO/EN to enable spread spectrum.
7 PWM I PWM dimming input.
8 NC — No connect
9 GND G Ground.
10 ISET A LED current setting resistor; for normal operation, resistor value from 24 kΩ to 129 kΩ must be connected between this pin and ground.
11 GND G Ground
12 OUT4 A Current sink output
This pin must be connected to GND if not used.
13 OUT3 A Current sink output
This pin must be connected to GND if not used.
14 OUT2 A Current sink output
This pin must be connected to GND if not used.
15 OUT1 A Current sink output
This pin must be connected to GND if not used.
16 FB A DC-DC (boost or SEPIC) feedback input; for normal operation this pin must be connected to the middle of a resistor divider between VOUT and ground using feedback resistor values from 5 kΩ to 150 kΩ.
17 PGND G DC-DC (boost or SEPIC) power ground
18 SW A DC-DC (boost or SEPIC) switch pin
19 NC A No connect
20 VIN A Input power pin
(1) A: Analog pin, G: Ground pin, P: Power pin, I: Input pin, I/O: Input/Output pin, O: Output pin, OD: Open Drain pin