SLVSBM5B December   2012  – August 2015 TPS61176

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 Supply Voltage
      2. 7.3.2 Boost Converter
      3. 7.3.3 Current Sinks
      4. 7.3.4 IFBx Pin Unused
      5. 7.3.5 Enable and Start-up
      6. 7.3.6 Brightness Dimming Control
    4. 7.4 Device Functional Modes
      1. 7.4.1 Dimming Modes
        1. 7.4.1.1 Analog Dimming Mode
        2. 7.4.1.2 PWM Dimming
      2. 7.4.2 Overvoltage Protection
      3. 7.4.3 Current Sink Open Protection
      4. 7.4.4 Overcurrent and Short Circuit Protection
      5. 7.4.5 Thermal Protection
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Single-Cell Battery Input Application
        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 Selection
          3. 8.2.1.2.3 Schottky Diode Selection
          4. 8.2.1.2.4 Isolation FET Selection
          5. 8.2.1.2.5 Audible Noise Reduction
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Multi-Cell Battery Input Application
      3. 8.2.3 Combined String Application
      4. 8.2.4 Separate PWM and EN Signals 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 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    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

RTE Package
16-Pin WQFN with Exposed Thermal Pad
Top View
TPS61176 po_lvsbm5.gif

Pin Functions

PIN TYPE DESCRIPTION
NAME NUMBER
COMP 4 Analog Connect an external 0.47-µF ceramic capacitor to this pin for the boost loop compensation.
GND 8 Ground Analog ground
IFB4 to IFB6,
IFB1 to IFB3		 5, 6, 7,
9, 10, 11		 Analog Regulated current sinks input pins
ISET 3 Analog Full-scale LED current setting pin. Connect a resistor to the pin to program the full-scale LED current.
MODE/FAULT 16 Input Multi-function pin. Use this pin to program the dimming mode. It also functions as a driver for external isolation P-channel MOSFET.(1)
OVP 12 Analog This pin monitors the output voltage of the boost converter through external resistor divider.
PGND 13 Ground Power ground
PWM/EN 1 Input PWM dimming signal input and device enable / disable control.(1)
SW 14 Analog Drain of the internal power MOSFET.
VIN 15 Power Supply input pin, provides power supply to the device.
VLDO 2 Analog Internal pre-regulator output. Connect a 1-µF ceramic capacitor to this pin.
Thermal Pad — — The GND pin should be connected to the exposed thermal pad for proper operation. This thermal pad should be connected to any internal PCB ground plan using multiple vias for good thermal performance.
(1) See Detailed Description for details.