SLUSDF7A January   2020  – February 2022 BQ25616

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and 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 Timing Requirements
    7. 8.7 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Power-On-Reset (POR)
      2. 9.3.2 Device Power Up From Battery Without Input Source
      3. 9.3.3 Power Up From Input Source
        1. 9.3.3.1 Power Up ACFET
        2. 9.3.3.2 Power Up REGN LDO
        3. 9.3.3.3 Poor Source Qualification
        4. 9.3.3.4 Input Source Type Detection (IINDPM Threshold)
          1. 9.3.3.4.1 D+/D– Detection Sets Input Current Limit
        5. 9.3.3.5 Input Voltage Limit Threshold Setting (VINDPM Threshold)
        6. 9.3.3.6 Power Up Converter in Buck Mode
      4. 9.3.4 Boost Mode Operation From Battery
      5. 9.3.5 Standalone Charger
      6. 9.3.6 Power Path Management
        1. 9.3.6.1 Narrow VDC Architecture
        2. 9.3.6.2 Dynamic Power Management
        3. 9.3.6.3 Supplement Mode
      7. 9.3.7 Battery Charging Management
        1. 9.3.7.1 Autonomous Charging Cycle
        2. 9.3.7.2 Battery Charging Profile
        3. 9.3.7.3 Charging Termination
        4. 9.3.7.4 Thermistor Qualification
          1. 9.3.7.4.1 JEITA Guideline Compliance During Charging Mode (BQ25616J)
          2. 9.3.7.4.2 Hot/Cold Temperature Window During Charging Mode (BQ25616)
          3. 9.3.7.4.3 Boost Mode Thermistor Monitor During Battery Discharge Mode
        5. 9.3.7.5 Charging Safety Timer
      8. 9.3.8 Status Outputs ( PG, STAT)
        1. 9.3.8.1 Power Good Indicator ( PG Pin )
        2. 9.3.8.2 Charging Status Indicator (STAT)
      9. 9.3.9 Protections
        1. 9.3.9.1 Input Current Limit
        2. 9.3.9.2 Voltage and Current Monitoring in Buck Mode
          1. 9.3.9.2.1 Input Overvoltage Protection (ACOV)
          2. 9.3.9.2.2 System Overvoltage Protection (SYSOVP)
        3. 9.3.9.3 Voltage and Current Monitoring in Boost Mode
          1. 9.3.9.3.1 Boost Mode Overvoltage Protection
        4. 9.3.9.4 Thermal Regulation and Thermal Shutdown
          1. 9.3.9.4.1 Thermal Protection in Buck Mode
          2. 9.3.9.4.2 Thermal Protection in Boost Mode
        5. 9.3.9.5 Battery Protection
          1. 9.3.9.5.1 Battery Overvoltage Protection (BATOVP)
          2. 9.3.9.5.2 Battery Overdischarge Protection
          3. 9.3.9.5.3 System Overcurrent Protection
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 BQ25616/616J Application without External OVP
        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 and Resistor
          3. 10.2.1.2.3 Output Capacitor
        3. 10.2.1.3 Application Curves
      2. 10.2.2 BQ25616/616J Application with External OVP
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
        3. 10.2.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  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 Support Resources
    5. 13.5 Trademarks
    6. 13.6 Electrostatic Discharge Caution
    7. 13.7 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
9.3.3.4.1 D+/D– Detection Sets Input Current Limit

The device contains a D+/D– based input source detection to set the input current limit when a 5-V adapter is plugged-in. The D+/D– detection includes standard USB BC1.2 and non-standard adapters. When an input source is plugged in, the device starts standard USB BC1.2 detection. The USB BC1.2 is capable of identifying Standard Downstream Port (SDP), Charging Downstream Port (CDP) and Dedicated Charging Port (DCP). The non-standard detection is used to distinguish vendor specific adapters (Apple and Samsung) based on their unique dividers on the D+/D– pins. If an adapter is detected as DCP, the input current limit is set at 2.4-A. If an adapter is detected as unknown, the input current limit is set by ILIM pin .

The D+/D– automatically runs when adapter plugs in. The D+/D– detection contains three steps, DCD (Data Contact Detection), primary detection, and secondary detection.

DCD (Data Contact Detection) uses a current source to detect when the D+/D– pins have made contact during an attach event. The protocol for data contact detect is as follows:

  • Detect VBUS present and VBUS_GD (pass poor source detection)
  • Turn on D+ IDP_SRC and the D– pull-down resistor RDM_DWN for 13 ms
  • If the USB connector is properly attached, the D+ line goes from HIGH to LOW, wait up to 0.5 sec. When the DCD timer of 0.5 sec is expired, the non-standard adapter detection is applied to set the input current limit.
  • Turn off IDP_SRC and disconnect RDM_DWN

The primary detection is used to distinguish between USB host (Standard Down Stream Port, or SDP) and different type of charging ports (Charging Down Stream Port, or CDP, and Dedicated Charging Port, or DCP). The protocol for primary detection is as follows:

  • Turn on VDP_SRC on D+ and IDM_Sink on D– for 40 ms
  • If portable device is attached to a USB host (SDP), the D– is below VREF_DAT. Otherwise, it is attached to either CDP or DCP.
  • Turn off VDP_SRC and IDM_Sink

The secondary detection is used to distinguish two types of charging ports (CDP and DCP). The protocol for secondary detection is as follows:

  • Turn on VDM_SRC on D- and IDP_Sink on D+ for 40 ms
  • If portable device is attached to a Charging Downstream Port (CDP), the D+ is below VDAT_REF. Otherwise, it is attached to DCP.
  • Turn off VDM_SRC and IDP_Sink

Most of the time, a CDP requires the portable device (such as smart phone, tablet) to send back an enumeration within 2.5 seconds of CDP plug-in. Otherwise, the port will power cycle back to SDP even the D+/D– detection indicates CDP.

Table 9-1 Non-Standard Adapter Detection
NON-STANDARD ADAPTERD+ THRESHOLDD– THRESHOLDINPUT CURRENT LIMIT (A)
Divider 1VD+ within VD+/D- _2p8VD– within VD+/D- _2p02.1
Divider 2VD+ within VD+/D- _1p2VD– within VD+/D- _1p22
Divider 3VD+ within VD+/D- _2p0VD– within VD+/D- _2p81
Divider 4VD+ within VD+/D- _2p8VD– within VD+/D- _2p82.4
Table 9-2 Input Current Limit Setting from D+/D– Detection
D+/D– DETECTIONINPUT CURRENT LIMIT (IINDPM)
USB CDP1.5 A
USB DCP2.4 A
Divider 12.1 A
Divider 22.0 A
Divider 31.0 A
Divider 42.4 A
Unknown 5-V AdapterSet by ILIM pin