SLUSCX8C March   2019  – March 2021 TPS92682-Q1

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  Device Enable
      2. 7.3.2  Internal Regulator and Undervoltage Lockout (UVLO)
      3. 7.3.3  Oscillator
      4. 7.3.4  Spread Spectrum Function
      5. 7.3.5  Gate Driver
      6. 7.3.6  Rail-to-Rail Current Sense Amplifier
      7. 7.3.7  Transconductance Error Amplifier
      8. 7.3.8  Switch Current Sense
      9. 7.3.9  Slope Compensation
      10. 7.3.10 ILED Setting in CC Mode
      11. 7.3.11 Output Voltage Setting in CV Mode
      12. 7.3.12 PWM Dimming
      13. 7.3.13 P-Channel FET Gate Driver Output
      14. 7.3.14 Soft Start
      15. 7.3.15 Two-Phase Operation
        1. 7.3.15.1 Current Sharing In Two-Phase
      16. 7.3.16 Faults and Diagnostics
        1. 7.3.16.1  Main Fault Timer (MFT)
        2. 7.3.16.2  OV Fault
        3. 7.3.16.3  UV Fault
        4. 7.3.16.4  ILIM Fault
        5. 7.3.16.5  UVLO
        6. 7.3.16.6  ILED Over Current (OC)
        7. 7.3.16.7  ILED Undercurrent (UC)
        8. 7.3.16.8  ISNOPEN, FBOPEN, and RTOPEN Faults
        9. 7.3.16.9  TW and TSD
        10. 7.3.16.10 COMPx Pull-Down and Comp-Low signal
    4. 7.4 Device Functional Modes
      1. 7.4.1 POR Mode
      2. 7.4.2 Normal Operation
      3. 7.4.3 Limp Home
    5. 7.5 Programming
      1. 7.5.1 Serial Interface
      2. 7.5.2 Command Frame
      3. 7.5.3 Response Frame
        1. 7.5.3.1 Read Response Frame Format
        2. 7.5.3.2 Write Response Frame Format
        3. 7.5.3.3 Write Error/POR Frame Format
      4. 7.5.4 SPI Error
    6. 7.6 TPS92682 Registers
      1. 7.6.1  EN Register
      2. 7.6.2  CFG1 Register
      3. 7.6.3  CFG2 Register
      4. 7.6.4  SWDIV Register
      5. 7.6.5  ISLOPE Register
      6. 7.6.6  FM Register
      7. 7.6.7  SOFTSTART Register
      8. 7.6.8  CH1IADJ Register
      9. 7.6.9  CH2IADJ Register
      10. 7.6.10 PWMDIV Register
      11. 7.6.11 CH1PWML Register
      12. 7.6.12 CH1PWMH Register
      13. 7.6.13 CH2PWML Register
      14. 7.6.14 CH2PWMH Register
      15. 7.6.15 ILIM Register
      16. 7.6.16 IFT Register
      17. 7.6.17 MFT Register
      18. 7.6.18 FLT1 Register (read only)
      19. 7.6.19 FLT2 Register (read only)
      20. 7.6.20 FEN1 Register
      21. 7.6.21 FEN2 Register
      22. 7.6.22 FLATEN Register
      23. 7.6.23 OV Register
      24. 7.6.24 LHCFG Register
      25. 7.6.25 LHCH1IADJ Register
      26. 7.6.26 LHCH2IADJ Register
      27. 7.6.27 LHCH1PWML Register
      28. 7.6.28 LHCH1PWMH Register
      29. 7.6.29 LHCH2PWML Register
      30. 7.6.30 LHCH2PWMH Register
      31. 7.6.31 LHILIM Register
      32. 7.6.32 LHIFT Register
      33. 7.6.33 LHMFT Register
      34. 7.6.34 LHFEN1 Register
      35. 7.6.35 LHFEN2 Register
      36. 7.6.36 LHFLATEN Register
      37. 7.6.37 LHOV Register
      38. 7.6.38 CAL Register
      39. 7.6.39 RESET Register
  8. 8 Application and Implementation
    1. 8.1 Application Information General Design Considerations
      1. 8.1.1 Switching Frequency, fSW
      2. 8.1.2 Duty Cycle Considerations
      3. 8.1.3 Main Power MOSFET Selection
      4. 8.1.4 Rectifier Diode Selection
      5. 8.1.5 Switch Current Sense Resistor
      6. 8.1.6 Slope Compensation
      7. 8.1.7 Soft Start
    2. 8.2 Application Information CC Mode
      1. 8.2.1 Inductor Selection
      2. 8.2.2 Output Capacitor Selection
      3. 8.2.3 Input Capacitor Selection
      4. 8.2.4 Programming LED Current
      5. 8.2.5 Feedback Compensation
      6. 8.2.6 Overvoltage and Undervoltage Protection
      7. 8.2.7 Series P-Channel MOSFET Selection
      8. 8.2.8 Programming Example for Two-Channel CC Mode
    3. 8.3 Typical Application CV Mode
      1. 8.3.1 Inductor Selection
      2. 8.3.2 Output Capacitor Selection
      3. 8.3.3 Input Capacitor Selection
      4. 8.3.4 Programming Output Voltage VOUT
      5. 8.3.5 Feedback Compensation
      6. 8.3.6 Overvoltage and Undervoltage Protection
      7. 8.3.7 Programing Example for Two-Phase CV BOOST
    4. 8.4 Typical Application CC Mode
      1. 8.4.1 CC Boost Design Requirements
      2. 8.4.2 CC Boost Detailed Design Procedure
        1. 8.4.2.1  Calculating Duty Cycle
        2. 8.4.2.2  Setting Switching Frequency
        3. 8.4.2.3  Setting Dither Modulation Frequency
        4. 8.4.2.4  Inductor Selection
        5. 8.4.2.5  Output Capacitor Selection
        6. 8.4.2.6  Input Capacitor Selection
        7. 8.4.2.7  Main N-Channel MOSFET Selection
        8. 8.4.2.8  Rectifier Diode Selection
        9. 8.4.2.9  Setting ILED and Selecting RCS
        10. 8.4.2.10 Setting Switch Current Limit
        11. 8.4.2.11 Slope Compensation
        12. 8.4.2.12 Compensator Parameters
        13. 8.4.2.13 Overvoltage Protection
        14. 8.4.2.14 Series P-Channel MOSFET Selection
      3. 8.4.3 CC Buck-Boost Design Requirements
      4. 8.4.4 CC Buck-Boost Detailed Design Procedure
        1. 8.4.4.1  Calculating Duty Cycle
        2. 8.4.4.2  Setting Switching Frequency
        3. 8.4.4.3  Setting Dither Modulation Frequency
        4. 8.4.4.4  Inductor Selection
        5. 8.4.4.5  Output Capacitor Selection
        6. 8.4.4.6  Input Capacitor Selection
        7. 8.4.4.7  Main N-Channel MOSFET Selection
        8. 8.4.4.8  Rectifier Diode Selection
        9. 8.4.4.9  Setting ILED and Selecting RCS
        10. 8.4.4.10 Setting Switch Current Limit
        11. 8.4.4.11 Slope Compensation
        12. 8.4.4.12 Compensator Parameters
        13. 8.4.4.13 Overvoltage Protection
      5. 8.4.5 PWM Dimming Consideration
      6. 8.4.6 Application Curves
    5. 8.5 Typical Application CV Mode
      1. 8.5.1 CV Design Requirements
      2. 8.5.2 Detailed Design Procedure
        1. 8.5.2.1  Calculating Duty Cycle
        2. 8.5.2.2  Setting Switching Frequency
        3. 8.5.2.3  Setting Dither Modulation Frequency
        4. 8.5.2.4  Inductor Selection
        5. 8.5.2.5  Output Capacitor Selection
        6. 8.5.2.6  Input Capacitor Selection
        7. 8.5.2.7  Main N-Channel MOSFET Selection
        8. 8.5.2.8  Rectifier Diode Selection
        9. 8.5.2.9  Programming VOUT
        10. 8.5.2.10 Setting Switch Current Limit
        11. 8.5.2.11 Slope Compensation
        12. 8.5.2.12 Compensator Parameters
        13. 8.5.2.13 Overvoltage Protection
      3. 8.5.3 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 Receiving Notification of Documentation Updates
    2. 11.2 Support 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

7.6 TPS92682 Registers

The SPI-accessible registers are 8-bits wide and exist in a 6-bit-addressable register array (0x00 through 0x3F). The registers in the TPS92682 device contain programmed information and operating status. Upon power-up the registers are reset to their default values. Writes to unlisted addresses are not permitted and may result in undesired operation. Reads of unlisted addresses return the zero value.

Reserved bits (“RSVD”) must be written with ‘0’ values when writing. Registers are read/write unless indicated in the description of the register. Table 7-2 lists the TPS92682 register map.

Table 7-2 TPS92682 Register Map
ADDRREGISTERD7D6D5D4D3D2D1D0DEFAULT
00hENFPINRSTSYNCENCH2MAXDENCH1MAXDENCH2PDRVENCH1PDRVENCH2ENCH1EN00111100
01hCFG1PWMPHINTPWM2PHLHCH2HGCH1HGCH2CVCH1CV00000000
02hCFG2CH2LEBCH1LEBRSVDRSVDCH2FILT1RSVDRSVDCH1FILT100000000
03hSWDIVRSVDRSVDRSVDRSVDCH2DIV1:0CH1DIV1:000000000
04hISLOPERSVDCH2ISLP2:0RSVDCH1ISLP2:001010101
05hFMRSVDRSVDFMMAG1:0FMFREQ3:000000101
06hSOFTSTARTCH2SS3:0CH1SS3:001110111
07hCH1IADJCH1IADJ7:000000000
08hCH2IADJCH2IADJ7:000000000
09hPWMDIVRSVDRSVDRSVDRSVDRSVDPWMDIV2:000000001
0AhCH1PWMLCH1PWM7:000000000
0BhCH1PWMHRSVDRSVDRSVDRSVDRSVDRSVDCH1PWM9:800000000
0ChCH2PWMLCH2PWM7:000000000
0DhCH2PWMHRSVDRSVDRSVDRSVDRSVDRSVDCH2PWM9:800000000
0EhILIMCH2ILIMCNT1:0CH1ILIMCNT1:0CH2ILIM1:0CH1ILIM1:000001111
0FhIFTRSVDRSVDRSVDRSVDCH2IFT1:0CH1IFT1:000001010
10hMFTCH2MFT3:0CH1MFT3:010011001
11hFLT1RTORSVDPCTWCH2OVCH1OVCH2UVCH1UVread
12hFLT2CH2UCCH1UCCH2OCCH1OCCH2ILIMCH1ILIMCH2ISOCH1ISOread
13hFEN1CH2RFENCH1RFENCH2FBOENCH1FBOENCH2OVENCH1OVENCH2UVENCH1UVEN00111100
14hFEN2OVOPTRSVDCH2OCENCH1OCENCH2ILIMENCH1ILIMENCH2ISOENCH1ISOEN00001111
15hFLATENCH2ILIMFLCH1ILIMFLCH2OCFLCH1OCFLCH2OVFLCH1OVFLCH2UVFLCH1UVFL00000000
16hOVRSVDCH2OV2:0RSVDCH1OV2:000100010
17hLHCFGLHPWMPHLHINTPWMLHCH2MAXDENLHCH1MAXDENLHCH2PDRVENLHCH1PDRVENLHCH2ENLHCH1EN00111100
18hLHCH1IADJLHCH1IADJ7:000000000
19hLHCH2IADJLHCH2IADJ7:000000000
1AhLHCH1PWMLLHCH1PWM7:000000000
1BhLHCH1PWMHRSVDRSVDRSVDRSVDRSVDRSVDLHCH1PWM9:800000000
1ChLHCH2PWMLLHCH2PWM7:000000000
1DhLHCH2PWMHRSVDRSVDRSVDRSVDRSVDRSVDLHCH2PWM9:800000000
1EhLHILIMLHCH2ILIMCNT1:0LHCH1ILIMCNT1:0LHCH2ILIM1:0LHCH1ILIM1:000001111
1FhLHIFTRSVDRSVDRSVDRSVDLHCH2IFT1:0LHCH1IFT1:000001010
20hLHMFTLHCH2MFT3:0LHCH1MFT3:010011001
21hLHFEN1LHCH2RFENLHCH1RFENLHCH2FBOENLHCH1FBOENLHCH2OVENLHCH1OVENLHCH2UVENLHCH1UVEN00111100
22hLHFEN2RSVDRSVDLHCH2OCENLHCH1OCENLHCH2ILIMENLHCH1ILIMENLHCH2ISOENLHCH1ISOEN00001111
23hLHFLATENLHCH2ILIMFLLHCH1ILIMFLLHCH2OCFLLHCH1OCFLLHCH2OVFLLHCH1OVFLLHCH2UVFLLHCH1UVFL00000000
24hLHOVRSVDLHCH2OV2:0RSVDLHCH1OV2:000100010
25hCALCH2CAL2:0CH2GOFFCH1CAL2:0CH1GOFF00000000
26hRESETRESET7:000000000

In the following sub-sections the descriptions of different registers in Table 7-2 are provided.