SLVS950I July   2009  – May 2018 TPS65070 , TPS65072 , TPS65073 , TPS650731 , TPS650732

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Block Diagram
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Options
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  ESD Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  Thermal Information
    5. 8.5  Electrical Characteristics
    6. 8.6  Electrical Characteristics - DCDC1 Converter
    7. 8.7  Electrical Characteristics - DCDC2 Converter
    8. 8.8  Electrical Characteristics - DCDC3 Converter
    9. 8.9  Electrical Characteristics - VLDO1 and VLDO2 Low Dropout Regulators
    10. 8.10 Electrical Characteristics - wLED Boost Converter
    11. 8.11 Electrical Characteristics - Reset, PB_IN, PB_OUT, PGood, Power_on, INT, EN_EXTLDO, EN_wLED
    12. 8.12 Electrical Characteristics - ADC Converter
    13. 8.13 Electrical Characteristics - Touch Screen Interface
    14. 8.14 Electrical Characteristics - Power Path
    15. 8.15 Electrical Characteristics - Battery Charger
    16. 8.16 Timing Requirements
    17. 8.17 Dissipation Ratings
    18. 8.18 Typical Characteristics
  9. 9 Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1  Battery Charger and Power Path
      2. 10.3.2  Power Down
      3. 10.3.3  Power-On Reset
      4. 10.3.4  Power-Path Management
        1. 10.3.4.1 SYS Output
      5. 10.3.5  Battery Charging
        1. 10.3.5.1 I-PRECHARGE
        2. 10.3.5.2 ITERM
        3. 10.3.5.3 Battery Detection and Recharge
        4. 10.3.5.4 Charge Termination On/Off
        5. 10.3.5.5 Timers
        6. 10.3.5.6 Dynamic Timer Function
        7. 10.3.5.7 Timer Fault
      6. 10.3.6  Battery Pack Temperature Monitoring
      7. 10.3.7  Battery Charger State Diagram
      8. 10.3.8  DC-DC Converters and LDOs
        1. 10.3.8.1 Operation
        2. 10.3.8.2 DCDC1 Converter
        3. 10.3.8.3 DCDC2 Converter
        4. 10.3.8.4 DCDC3 Converter
      9. 10.3.9  Power Save Mode
        1. 10.3.9.1 Dynamic Voltage Positioning
        2. 10.3.9.2 100% Duty Cycle Low Dropout Operation
        3. 10.3.9.3 Undervoltage Lockout
      10. 10.3.10 Short-Circuit Protection
        1. 10.3.10.1 Soft Start
      11. 10.3.11 Enable
        1. 10.3.11.1 RESET (TPS65070, TPS65073, TPS650731, TPS650732 Only)
        2. 10.3.11.2 PGOOD (Reset Signal For Applications Processor)
        3. 10.3.11.3 PB_IN (Push-Button IN)
        4. 10.3.11.4 PB_OUT
        5. 10.3.11.5 POWER_ON
        6. 10.3.11.6 EN_wLED (TPS65072 Only)
        7. 10.3.11.7 EN_EXTLDO (TPS65072 Only)
      12. 10.3.12 Short-Circuit Protection
      13. 10.3.13 Thermal Shutdown
        1. 10.3.13.1 Low Dropout Voltage Regulators
        2. 10.3.13.2 White LED Boost Converter
        3. 10.3.13.3 A/D Converter
        4. 10.3.13.4 Touch Screen Interface (only for TPS65070, TPS65073, TPS650731, TPS650732)
          1. 10.3.13.4.1 Performing Measurements Using the Touch Screen Controller
    4. 10.4 Device Functional Modes
    5. 10.5 Programming
      1. 10.5.1 I2C Interface Specification
        1. 10.5.1.1 Serial interface
    6. 10.6 Register Maps
      1. 10.6.1  PPATH1. Register Address: 01h
      2. 10.6.2  INT. Register Address: 02h
      3. 10.6.3  CHGCONFIG0. Register Address: 03h
      4. 10.6.4  CHGCONFIG1. Register Address: 04h
      5. 10.6.5  CHGCONFIG2. Register Address: 05h
      6. 10.6.6  CHGCONFIG3. Register Address: 06h
      7. 10.6.7  ADCONFIG. Register Address: 07h
      8. 10.6.8  TSCMODE. Register Address: 08h
      9. 10.6.9  ADRESULT_1. Register Address: 09h
      10. 10.6.10 ADRESULT_2. Register Address: 0Ah
      11. 10.6.11 PGOOD. Register Address: 0Bh
      12. 10.6.12 PGOODMASK. Register Address: 0Ch
      13. 10.6.13 CON_CTRL1. Register Address: 0Dh
      14. 10.6.14 CON_CTRL2. Register Address: 0Eh
      15. 10.6.15 CON_CTRL3. Register Address: 0Fh
      16. 10.6.16 DEFDCDC1. Register Address: 10h
      17. 10.6.17 DEFDCDC2_LOW. Register Address: 11h
      18. 10.6.18 DEFDCDC2_HIGH. Register Address: 12h
      19. 10.6.19 DEFDCDC3_LOW. Register Address: 13h
      20. 10.6.20 DEFDCDC3_HIGH. Register Address: 14h
      21. 10.6.21 DEFSLEW. Register Address: 15h
      22. 10.6.22 LDO_CTRL1. Register Address: 16h
      23. 10.6.23 DEFLDO2. Register Address: 17h
      24. 10.6.24 WLED_CTRL1. Register Address: 18h
      25. 10.6.25 WLED_CTRL2. Register Address: 19h
  11. 11Application and Implementation
    1. 11.1 Application Information
      1. 11.1.1 Power Solutions For Different Application Processors
        1. 11.1.1.1 Default Settings
        2. 11.1.1.2 Starting TPS6507x
    2. 11.2 Typical Applications
      1. 11.2.1 General PMIC Application
        1. 11.2.1.1 Design Requirements
        2. 11.2.1.2 Detailed Design Procedure
          1. 11.2.1.2.1 Output Filter Design (Inductor and Output Capacitor)
            1. 11.2.1.2.1.1 Inductor Selection
            2. 11.2.1.2.1.2 Output Capacitor Selection
            3. 11.2.1.2.1.3 Input Capacitor Selection/Input Voltage
            4. 11.2.1.2.1.4 Output Voltage Selection
            5. 11.2.1.2.1.5 Voltage Change on DCDC2 and DCDC3
          2. 11.2.1.2.2 LDOs
            1. 11.2.1.2.2.1 Output Capacitor Selection
            2. 11.2.1.2.2.2 Input Capacitor Selection
            3. 11.2.1.2.2.3 Output Voltage Change For LDO1 and LDO2
            4. 11.2.1.2.2.4 Unused LDOs
          3. 11.2.1.2.3 White-LED Boost Converter
            1. 11.2.1.2.3.1 LED-Current Setting/Dimming
            2. 11.2.1.2.3.2 Setup
            3. 11.2.1.2.3.3 Setting the LED Current
            4. 11.2.1.2.3.4 Inductor Selection
            5. 11.2.1.2.3.5 Diode Selection
            6. 11.2.1.2.3.6 Output Capacitor Selection
            7. 11.2.1.2.3.7 Input Capacitor Selection
          4. 11.2.1.2.4 Battery Charger
            1. 11.2.1.2.4.1 Temperature Sensing
            2. 11.2.1.2.4.2 Changing the Charging Temperature Range (Default 0°C to 45°C)
        3. 11.2.1.3 Application Curves
      2. 11.2.2 Powering OMAP-L138
        1. 11.2.2.1 Design Requirements
        2. 11.2.2.2 Detailed Design Procedure
      3. 11.2.3 Powering Atlas IV
        1. 11.2.3.1 Design Requirements
        2. 11.2.3.2 Detailed Design Procedure
          1. 11.2.3.2.1 Prima SLEEP Mode and DEEP SLEEP Mode Support
          2. 11.2.3.2.2 SLEEP Mode
          3. 11.2.3.2.3 DEEP SLEEP Mode
      4. 11.2.4 OMAP35xx (Supporting SYS-OFF Mode)
        1. 11.2.4.1 Design Requirements
        2. 11.2.4.2 Detailed Design Procedure
      5. 11.2.5 TPS650731 for OMAP35xx
        1. 11.2.5.1 Design Requirements
        2. 11.2.5.2 Detailed Design Procedure
      6. 11.2.6 Powering AM3505 Using TPS650732
        1. 11.2.6.1 Design Requirements
        2. 11.2.6.2 Detailed Design Procedure
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14Device and Documentation Support
    1. 14.1 Device Support
      1. 14.1.1 Third-Party Products Disclaimer
    2. 14.2 Documentation Support
      1. 14.2.1 Related Documentation
    3. 14.3 Related Links
    4. 14.4 Receiving Notification of Documentation Updates
    5. 14.5 Community Resources
    6. 14.6 Trademarks
    7. 14.7 Electrostatic Discharge Caution
    8. 14.8 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

10.3.5 Battery Charging

When Bit CHARGER ENABLE in register CHGCONFIG1 is set to 1, battery charging can begin. First, the device checks for a short-circuit on the BAT pin: IBAT(SC) is turned on till the voltage on the BAT pin rises above VBAT(SC). If conditions are safe, it proceeds to charge the battery.

The battery is charged in three phases: conditioning precharge, constant current fast charge (current regulation) and a constant voltage tapering-off (voltage regulation). In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded.

Figure 28 shows what happens in each of the three phases.

TPS65070 TPS65072 TPS65073 TPS650731 TPS650732 batt_chg_lvs950.gifFigure 28. Battery Charge

In the precharge phase, the battery is charged at a current of IPRECHG. The battery voltage starts rising. Once the battery voltage crosses the VLOWV threshold, the battery is charged at a current of ICHG. The battery voltage continues to rise. When the battery voltage reaches VBAT(REG), the battery is held at a constant value of VBAT(REG). The battery current now decreases as the battery approaches full charge. When the battery current reaches ITERM, the TERM CURRENT flag in register CHGCONFIG0 indicates charging done by going high.

Note that termination detection is disabled whenever the charge rate is reduced from the set point because of the actions of the thermal loop, the DPM loop or the VIN-LOW loop.

The value of the fast-charge current is set by the resistor connected from the ISET pin to GND, and is given by the equation

Equation 1. ICHG = KISET / RISET
Equation 2. RISET = KISET / ICHG

Note that if ICHG is programmed as greater than the input current limit, the battery will not charge at the rate of ICHG, but at the slower rate of IIN-MAX (minus the load current on the OUT pin, if any). In this case, the charger timers will be slowed down by 2x whenever the thermal loop or DPPM is active.