SLVSB64I November   2011  – March 2018 TPS65217

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Application Diagram
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin 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 I2C Timing Requirements
    7. 7.7 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  Wake-Up and Power-Up Sequencing
        1. 8.3.1.1 Power-Up Sequencing
        2. 8.3.1.2 Power-Down Sequencing
        3. 8.3.1.3 Special Strobes (STROBE 14 and 15)
      2. 8.3.2  Power Good
        1. 8.3.2.1 LDO1, LDO2 Power-Good (LDO_PGOOD)
        2. 8.3.2.2 Primary Power-Good (PGOOD)
        3. 8.3.2.3 Load Switch PGOOD
      3. 8.3.3  Push-Button Monitor (PB_IN)
      4. 8.3.4  nWAKEUP Pin (nWAKEUP)
      5. 8.3.5  Power Enable Pin (PWR_EN)
      6. 8.3.6  Reset Pin (nRESET)
      7. 8.3.7  Interrupt Pin (nINT)
      8. 8.3.8  Analog Multiplexer
      9. 8.3.9  Battery Charger and Power Path
        1. 8.3.9.1 Shorted or Absent Battery (VBAT < 1.5 V)
        2. 8.3.9.2 Dead Battery (1.5 V < VBAT < VUVLO)
        3. 8.3.9.3 Good Battery (VBAT > VUVLO)
        4. 8.3.9.4 AC and USB Input Discharge
      10. 8.3.10 Battery Charging
      11. 8.3.11 Precharge
      12. 8.3.12 Charge Termination
      13. 8.3.13 Battery Detection and Recharge
      14. 8.3.14 Safety Timer
        1. 8.3.14.1 Dynamic Timer Function
        2. 8.3.14.2 Timer Fault
      15. 8.3.15 Battery-Pack Temperature Monitoring
      16. 8.3.16 DC/DC Converters
        1. 8.3.16.1 Operation
        2. 8.3.16.2 Output Voltage Setting
        3. 8.3.16.3 Power-Save Mode and Pulse-Frequency Modulation (PFM)
        4. 8.3.16.4 Dynamic Voltage Positioning
        5. 8.3.16.5 100% Duty-Cycle Low-Dropout Operation
        6. 8.3.16.6 Short-Circuit Protection
        7. 8.3.16.7 Soft Start
      17. 8.3.17 Standby LDO Regulators (LDO1, LDO2)
      18. 8.3.18 Load Switches or LDO Regulators (LS1 or LDO3, LS2 or LDO4)
      19. 8.3.19 White LED Driver
    4. 8.4 Device Functional Modes
      1. 8.4.1 PMIC States
        1. 8.4.1.1 OFF State
        2. 8.4.1.2 ACTIVE State
        3. 8.4.1.3 SLEEP State
        4. 8.4.1.4 RESET State
    5. 8.5 Programming
      1. 8.5.1 I2C Bus Operation
      2. 8.5.2 Password Protection
        1. 8.5.2.1 Level1 Protection
        2. 8.5.2.2 Level2 Protection
      3. 8.5.3 Resetting of Registers to Default Values
    6. 8.6 Register Maps
      1. 8.6.1  Register Address Map
      2. 8.6.2  Chip ID Register (CHIPID) (Address = 0x00) [reset = X]
        1. Table 2. CHIPID Register Field Descriptions
      3. 8.6.3  Power Path Control Register (PPATH) (Address = 0x01) [reset = 0x3D]
        1. Table 3. PPATH Register Field Descriptions
      4. 8.6.4  Interrupt Register (INT) (Address = 0x02) [reset = 0x80]
        1. Table 4. INT Register Field Descriptions
      5. 8.6.5  Charger Configuration Register 0 (CHGCONFIG0) (Address = 0x03) [reset = 0x00]
        1. Table 5. CHGCONFIG0 Register Field Descriptions
      6. 8.6.6  Charger Configuration Register 1 (CHGCONFIG1) (Address = 0x04) [reset = 0xB1]
        1. Table 6. CHGCONFIG1 Register Field Descriptions
      7. 8.6.7  Charger Configuration Register 2 (CHGCONFIG2) (Address = 0x05) [reset = 0x80]
        1. Table 7. CHGCONFIG2 Register Field Descriptions
      8. 8.6.8  Charger Configuration Register 3 (CHGCONFIG3) (Address = 0x06) [reset = 0xB2]
        1. Table 8. CHGCONFIG3 Register Field Descriptions
      9. 8.6.9  WLED Control Register 1 (WLEDCTRL1) (Address = 0x07) [reset = 0xB1]
        1. Table 9. WLEDCTRL1 Register Field Descriptions
      10. 8.6.10 WLED Control Register 2 (WLEDCTRL2) (Address = 0x08) [reset = 0x00]
        1. Table 10. WLEDCTRL2 Register Field Descriptions
      11. 8.6.11 MUX Control Register (MUXCTRL) (Address = 0x09) [reset = 0x00]
        1. Table 11. MUXCTRL Register Field Descriptions
      12. 8.6.12 Status Register (STATUS) (Address = 0x0A) [reset = 0x00]
        1. Table 12. STATUS Register Field Descriptions
      13. 8.6.13 Password Register (PASSWORD) (Address = 0x0B) [reset = 0x00]
        1. Table 13. Password Register (PASSWORD) Field Descriptions
      14. 8.6.14 Power Good Register (PGOOD) (Address = 0x0C) [reset = 0x00]
        1. Table 14. PGOOD Register Field Descriptions
      15. 8.6.15 Power-Good Control Register (DEFPG) (Address = 0x0D) [reset = 0x0C]
        1. Table 15. DEFPG Register Field Descriptions
      16. 8.6.16 DCDC1 Control Register (DEFDCDC1) (Address = 0x0E) [reset = X]
        1. Table 16. DEFDCDC1 Register Field Descriptions
      17. 8.6.17 DCDC2 Control Register (DEFDCDC2) (Address = 0x0F) [reset = X]
        1. Table 17. DEFDCDC2 Register Field Descriptions
      18. 8.6.18 DCDC3 Control Register (DEFDCDC3) (Address = 0x10) [reset = 0x08]
        1. Table 18. DEFDCDC3 Register Field Descriptions
      19. 8.6.19 Slew-Rate Control Register (DEFSLEW) (Address = 0x11) [reset = 0x06]
        1. Table 19. DEFSLEW Register Field Descriptions
      20. 8.6.20 LDO1 Control Register (DEFLDO1) (Address = 0x12) [reset = 0x09]
        1. Table 20. DEFLDO1 Register Field Descriptions
      21. 8.6.21 LDO2 Control Register (DEFLDO2) (Address = 0x13) [reset = 0x38]
        1. Table 21. DEFLDO2 Register Field Descriptions
      22. 8.6.22 Load Switch1 or LDO3 Control Register (DEFLS1) (Address = 0x14) [reset = X]
        1. Table 22. DEFLS1 Register Field Descriptions
      23. 8.6.23 Load Switch2 or LDO4 Control Register (DEFLS2) (Address = 0x15) [reset = X]
        1. Table 23. DEFLS2 Register Field Descriptions
      24. 8.6.24 Enable Register (ENABLE) (Address = 0x16) [reset = 0x00]
        1. Table 24. ENABLE Register Field Descriptions
      25. 8.6.25 UVLO Control Register (DEFUVLO) (Address = 0x18) [reset = 0x03]
        1. Table 25. DEFUVLO Register Field Descriptions
      26. 8.6.26 Sequencer Register 1 (SEQ1) (Address = 0x19) [reset = X]
        1. Table 26. SEQ1 Register Field Descriptions
      27. 8.6.27 Sequencer Register 2 (SEQ2) (Address = 0x1A) [reset = X]
        1. Table 27. SEQ2 Register Field Descriptions
      28. 8.6.28 Sequencer Register 3 (SEQ3) (Address = 0x1B) [reset = X]
        1. Table 28. SEQ3 Register Field Descriptions
      29. 8.6.29 Sequencer Register 4 (SEQ4) (Address = 0x1C) [reset = 0x40]
        1. Table 29. SEQ4 Register Field Descriptions
      30. 8.6.30 Sequencer Register 5 (SEQ5) (Address = 0x1D) [reset = X]
        1. Table 30. SEQ5 Register Field Descriptions
      31. 8.6.31 Sequencer Register 6 (SEQ6) (Address = 0x1E) [reset = 0x00]
        1. Table 31. SEQ6 Register Field Descriptions
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Output Filter Design (Inductor and Output Capacitor)
          1. 9.2.2.1.1 Inductor Selection for Buck Converters
          2. 9.2.2.1.2 Output Capacitor Selection
          3. 9.2.2.1.3 Input Capacitor Selection
        2. 9.2.2.2 5-V Operation Without a Battery
      3. 9.2.3 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 Third-Party Products Disclaimer
    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

8.3.19 White LED Driver

The TPS65217x device has a boost converter and two current sinks capable of driving two strings containing up to 10 LEDs in each string (also known as a 2 × 10 matrix) LEDs at 25 mA or one string of up to 10 LEDs at 50 mA of current. Use Equation 3 to calculate the current of each current sink.

Equation 3. TPS65217 eq7_SLVSB64.gif

Two different current levels can be programmed using two external RSET resistors. Only one current setting is active at any given time, and both current sinks are always regulated to the same current. The active current setting is selected through the ISEL bit of the WLEDCTRL1 register.

An internal PWM signal and I2C control support brightness and dimming. Both current sources are controlled together and cannot operate independently. By default, the PWM frequency is set to 200 Hz, but can be changed to 100 Hz, 500 Hz, or 1000 Hz. The PWM duty cycle can be adjusted from 1% (default) to 100% in 1% steps through the WLEDCTRL2 register.

When the ISINK_EN bit of WLEDCTRL1 register is set to 1b, both current sinks are enabled, and the boost output voltage at the FB_WLED pin is regulated to support the same sink current through each current sink. The boost output voltage, however, is internally limited to 39 V.

If only one WLED string is required, short the ISINK1 and ISINK2 pins together and connect them to the cathode of the diode string. In this case, the LED current two times the sink current. Figure 22 shows the basic schematic and internal circuitry of the WLED driver used to drive two strings. Figure 23 shows the basic schematic and internal circuitry of the WLED driver used to one string. Table 33 and Table 34 list the recommended inductors and output capacitors for the WLED boost converters.

TPS65217 wled_driver_fbd_lvsb64.gifFigure 22. Block Diagram of WLED Driver—Dual-String Operation
TPS65217 wled_driver_fbd2_lvsb64.gif
This operation has the same LED current as dual-string operation. For single-string operation, both ISINK pins are shorted together and the RSET resistor values (R1 and R2) are doubled to halve the current that each ISINKx pin pulls, resulting in the same current through the LEDs as in dual-string operation.
Figure 23. Block Diagram of WLED Driver—Single-String Operation