SLVS977B February   2010  – July 2016 TPS61325

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 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1  LED High-current Regulators, Unused Inputs
      2. 9.3.2  Safety Timer Accuracy
      3. 9.3.3  Current Limit Operation
      4. 9.3.4  Start-Up Sequence
      5. 9.3.5  Power Good (Flash Ready)
      6. 9.3.6  LED Temperature Monitoring
      7. 9.3.7  Hot Die Detector
      8. 9.3.8  Undervoltage Lockout
      9. 9.3.9  Storage Capacitor Active Cell Balancing
      10. 9.3.10 RED Light Privacy Indicator
      11. 9.3.11 White LED Privacy Indicator
      12. 9.3.12 Storage Capacitor, Precharge Voltage Calibration
      13. 9.3.13 Storage Capacitor, Adaptive Precharge Voltage
      14. 9.3.14 Serial Interface Description
        1. 9.3.14.1 F/S-Mode Protocol
        2. 9.3.14.2 HS-Mode Protocol
    4. 9.4 Device Functional Modes
      1. 9.4.1  Down Mode In Voltage Regulation Mode
      2. 9.4.2  Power-Save Mode Operation, Efficiency
      3. 9.4.3  Mode Of Operation: DC-Light and Flashlight
      4. 9.4.4  Flash Strobe Is Level Sensitive (STT = 0): LED Strobe Follows STRB0 and STRB1 Inputs
      5. 9.4.5  Flash Strobe Is Leading Edge Sensitive (STT = 1): One-Shot LED Strobe
      6. 9.4.6  LED Failure Modes and Overvoltage Protection
      7. 9.4.7  Hardware Voltage Mode Selection
      8. 9.4.8  Flashlight Blanking (Tx-MASK)
      9. 9.4.9  Shutdown
      10. 9.4.10 Thermal Shutdown
    5. 9.5 Programming
      1. 9.5.1 TPS6132x I2C Update Sequence
    6. 9.6 Register Maps
      1. 9.6.1  Slave Address Byte
      2. 9.6.2  Register Address Byte
      3. 9.6.3  REGISTER0 (address = 0x00)
      4. 9.6.4  REGISTER1 (address = 0x01)
      5. 9.6.5  REGISTER2 (address = 0x02)
      6. 9.6.6  REGISTER3 (address = 0x03)
      7. 9.6.7  REGISTER4 (address = 0x04)
      8. 9.6.8  REGISTER5 (address = 0x05)
      9. 9.6.9  REGISTER6 (address = 0x06)
      10. 9.6.10 REGISTER7 (address = 0x07)
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 4100-mA Two White High-Power LED Flashlight With Storage Capacitor
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Inductor Selection
          2. 10.2.1.2.2 Input Capacitor
          3. 10.2.1.2.3 Output Capacitor
          4. 10.2.1.2.4 NTC Selection
          5. 10.2.1.2.5 Checking Loop Stability
        3. 10.2.1.3 Application Curves
      2. 10.2.2 Other Application Circuit Examples
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
    3. 12.3 Thermal Considerations
  13. 13Device and Documentation Support
    1. 13.1 Device Support
      1. 13.1.1 Third-Party Products Disclaimer
    2. 13.2 Documentation Support
      1. 13.2.1 Related Documentation
    3. 13.3 Receiving Notification of Documentation Updates
    4. 13.4 Community Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

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11 Power Supply Recommendations

The device is designed to operate from an input voltage supply range from 2.5 V to 5.5 V. This input supply must be well regulated. If the input supply is located more than a few inches from the converter, additional bulk capacitance may be required in addition to the ceramic bypass capacitors. TI recommends an electrolytic or tantalum capacitor with a value of 47 µF in this circumstance.