SLUSDU0A september   2019  – august 2023 BQ21061

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 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 Timing Requirements
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Linear Charger and Power Path
        1. 7.3.1.1 Battery Charging Process
        2. 7.3.1.2 JEITA and Battery Temperature Dependent Charging
        3. 7.3.1.3 Input Voltage Based Dynamic Power Management (VINDPM) and Dynamic Power Path Management (DPPM)
        4. 7.3.1.4 Battery Supplement Mode
      2. 7.3.2  Protection Mechanisms
        1. 7.3.2.1 Input Over-Voltage Protection
        2. 7.3.2.2 Safety Timer and I2C Watchdog Timer
        3. 7.3.2.3 Thermal Protection and Thermal Charge Current Foldback
        4. 7.3.2.4 Battery Short and Over Current Protection
        5. 7.3.2.5 PMID Short Circuit
      3. 7.3.3  VDD LDO
      4. 7.3.4  Load Switch/LDO Output and Control
      5. 7.3.5  PMID Power Control
      6. 7.3.6  System Voltage (PMID) Regulation
      7. 7.3.7  MR Wake and Reset Input
        1. 7.3.7.1 MR Wake or Short Button Press Functions
        2. 7.3.7.2 MR Reset or Long Button Press Functions
      8. 7.3.8  14-Second Watchdog for HW Reset
      9. 7.3.9  Faults Conditions and Interrupts ( INT)
        1. 7.3.9.1 Flags and Fault Condition Response
      10. 7.3.10 Power Good ( PG) Pin
      11. 7.3.11 External NTC Monitoring (TS)
        1. 7.3.11.1 TS Thresholds
      12. 7.3.12 I2C Interface
        1. 7.3.12.1 F/S Mode Protocol
    4. 7.4 Device Functional Modes
      1. 7.4.1 Ship Mode
      2. 7.4.2 Low Power
      3. 7.4.3 Active Battery
      4. 7.4.4 Charger/Adapter Mode
      5. 7.4.5 Power-Up/Down Sequencing
    5. 7.5 Register Map
      1. 7.5.1 I2C Registers
  9. 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
        1. 8.2.2.1 Input (IN/PMID) Capacitors
        2. 8.2.2.2 VDD, LDO Input and Output Capacitors
        3. 8.2.2.3 TS
        4. 8.2.2.4 Recommended Passive Components
      3. 8.2.3 Application Curves
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Trademarks
    7. 11.7 Glossary
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.3.7 MR Wake and Reset Input

The MR input has three main functions in the BQ21061. First, it serves as a means to wake the device from Ship Mode. Second, it serves as a short button press detector, sending an interrupt to the host when the button driving the MR pin has been pressed for a given period of time. This allows the implementation of different functions in the end application such as menu selection and control. And finally it serves as a means to get the BQ21061 to reset the system by performing a power cycle (shut down PMID and automatically powering it back on) or go to Ship Mode after detecting a long button press. The timing for the short and long button press duration is programmable through I2C for added flexibility. Note that if a specific timer duration is changed through I2C while that timer is active and has not expired, the new programmed value will be ignored until the timer expires and/or is reset by MR. The MR input has an internal pull-up to BAT.