SCDS335A September   2012  – August 2014 TSU8111

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 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 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 Linear Charger
      2. 7.3.2 Voltage Protection
        1. 7.3.2.1 Overvoltage Protection
        2. 7.3.2.2 Undervoltage Protection
      3. 7.3.3 Power-on Reset
      4. 7.3.4 Software Reset
      5. 7.3.5 Power Supervisor
    4. 7.4 Device Functional Modes
      1. 7.4.1 Standby Mode
      2. 7.4.2 Automatic Switching Mode
      3. 7.4.3 Manual Switching Mode
    5. 7.5 Programming
      1. 7.5.1 Writes
      2. 7.5.2 Reads
    6. 7.6 Register Map
      1. 7.6.1  Device ID (01h) Register Field Descriptions
      2. 7.6.2  Control (02h) Register Field Descriptions
      3. 7.6.3  Interrupt 1 (03h) Register Field Descriptions
      4. 7.6.4  Interrupt 2 (04h) Register Field Descriptions
      5. 7.6.5  Interrupt Mask 1 (05h) Register Field Descriptions
      6. 7.6.6  Interrupt Mask 2 (06h) Register Field Descriptions
      7. 7.6.7  ADC (07h) Register Field Descriptions
      8. 7.6.8  Timing Set 1 (08h) Register Field Descriptions
      9. 7.6.9  Timing Set 2 (09h) Register Field Descriptions
      10. 7.6.10 Device Type 1 (0Ah) Register Field Descriptions
      11. 7.6.11 Device Type 2 (0Bh) Register Field Descriptions
      12. 7.6.12 Button 1 (0Ch) Register Field Descriptions
      13. 7.6.13 Button 2 (0Dh) Register Field Descriptions
      14. 7.6.14 Manual SW 1 (13h) Register Field Descriptions
      15. 7.6.15 Manual SW 2 (14h) Register Field Descriptions
      16. 7.6.16 Reset (1Bh) Register Field Descriptions
      17. 7.6.17 Charger control 1 (20h) Register Field Descriptions
      18. 7.6.18 Charger control 2 (21h) Register Field Descriptions
      19. 7.6.19 Battery Charger Control 3 (22h) Register Field Descriptions
      20. 7.6.20 Charger Interrupt (24h) Register Field Descriptions
      21. 7.6.21 Charger Interrupt Mask (25h) Register Field Descriptions
      22. 7.6.22 Charger Status (26h) Register Field Descriptions
  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
      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 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8 Application and Implementation

8.1 Application Information

The TSU8111 device can be used in portable device (PD) applications for interfacing the PD with external peripherals. The TSU8111 is ideal for use when a PD needs two separate USB signal paths, accessory detection, charger detection, and a battery charging IC.

8.2 Typical Application

typ_app_scds335.gifFigure 12. Interface from Host Processor to USB Connector and Battery

8.2.1 Design Requirements

For this design example, use the parameters listed in Table 24.

Table 24. Design Parameters

DESIGN PARAMETER EXAMPLE VALUE
VBAT 3 V to 4.4 V
VBUS 4 V to 6.5 V
VDDIO 1.65 V to 3.6 V

8.2.2 Detailed Design Procedure

To begin the design process, determine the following:

  • Desired ESD protection on micro-USB signal lines
    • Addition of optional 1-pF ESD diodes on the USB lines protects against ±8-kV IEC-61000-4-2 contact discharge. The optional 2.2-Ω resistors provide additional protection for the internal circuitry near the USB inputs.
  • Output current on LDO
    • Use the charging specifications for the Li-Ion or Li-Polymer battery to determine the desired output current register setting for the TSU8111 LDO.

8.2.3 Application Curves

C001_SCDS335.pngFigure 13. USB Signal vs On-resistance