SLUSEC9B October   2020  – July 2024 BQ25618E , BQ25619E

PRODUCTION DATA  

  1.   1
  2. Features
  3. Applications
  4. Description
  5. Description (continued)
  6. Device Comparison Table
  7. Pin Configuration and Functions
  8. 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 Timing Requirements
    7. 7.7 Typical Characteristics
  9. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power-On-Reset (POR)
      2. 8.3.2 Device Power Up From Battery Without Input Source
      3. 8.3.3 Power Up From Input Source
        1. 8.3.3.1 Power Up REGN LDO
        2. 8.3.3.2 Poor Source Qualification
        3. 8.3.3.3 Input Source Type Detection (IINDPM Threshold)
          1. 8.3.3.3.1 PSEL Pins Sets Input Current Limit
        4. 8.3.3.4 Input Voltage Limit Threshold Setting (VINDPM Threshold)
        5. 8.3.3.5 Power Up Converter in Buck Mode
        6. 8.3.3.6 HIZ Mode with Adapter Present
      4. 8.3.4 Power Path Management
        1. 8.3.4.1 Narrow Voltage DC (NVDC) Architecture
        2. 8.3.4.2 Dynamic Power Management
        3. 8.3.4.3 Supplement Mode
      5. 8.3.5 Battery Charging Management
        1. 8.3.5.1 Autonomous Charging Cycle
        2. 8.3.5.2 Battery Charging Profile
        3. 8.3.5.3 Charging Termination
        4. 8.3.5.4 Thermistor Qualification
          1. 8.3.5.4.1 JEITA Guideline Compliance During Charging Mode
        5. 8.3.5.5 Charging Safety Timer
      6. 8.3.6 Ship Mode and QON Pin
        1. 8.3.6.1 BATFET Disable (Enter Ship Mode)
        2. 8.3.6.2 BATFET Enable (Exit Ship Mode)
        3. 8.3.6.3 BATFET Full System Reset
      7. 8.3.7 Status Outputs ( STAT, INT , PG )
        1. 8.3.7.1 Power Good Indicator (PG_STAT Bit; BQ25619E only)
        2. 8.3.7.2 Charging Status Indicator (STAT)
        3. 8.3.7.3 Interrupt to Host ( INT)
      8. 8.3.8 Protections
        1. 8.3.8.1 Voltage and Current Monitoring in Buck Mode
          1. 8.3.8.1.1 Input Overvoltage Protection (ACOV)
          2. 8.3.8.1.2 System Overvoltage Protection (SYSOVP)
        2. 8.3.8.2 Thermal Regulation and Thermal Shutdown
          1. 8.3.8.2.1 Thermal Protection in Buck Mode
        3. 8.3.8.3 Battery Protection
          1. 8.3.8.3.1 Battery Overvoltage Protection (BATOVP)
          2. 8.3.8.3.2 Battery Overdischarge Protection
          3. 8.3.8.3.3 System Overcurrent Protection
      9. 8.3.9 Serial Interface
        1. 8.3.9.1 Data Validity
        2. 8.3.9.2 START and STOP Conditions
        3. 8.3.9.3 Byte Format
        4. 8.3.9.4 Acknowledge (ACK) and Not Acknowledge (NACK)
        5. 8.3.9.5 Slave Address and Data Direction Bit
        6. 8.3.9.6 Single Read and Write
        7. 8.3.9.7 Multi-Read and Multi-Write
    4. 8.4 Device Functional Modes
      1. 8.4.1 Host Mode and Default Mode
    5. 8.5 Register Maps
  10. 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 Inductor Selection
        2. 9.2.2.2 Input Capacitor and Resistor
        3. 9.2.2.3 Output Capacitor
      3. 9.2.3 Application Curves
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  13. 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 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  14. 13Revision History
  15. 14Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RTW|24
Thermal pad, mechanical data (Package|Pins)
Orderable Information
JEITA Guideline Compliance During Charging Mode

To improve the safety of charging Li-ion batteries, the JEITA guideline was released on April 20, 2007. The guideline emphasized the importance of avoiding a high charge current and high charge voltage at certain low and high temperature ranges.

To initiate a charge cycle, the voltage on TS pin, as a percentage of VREGN, must be within the VT1_FALL% to VT5_RISE% thresholds. If the TS voltage percentage exceeds the T1-T5 range, the controller suspends charging, a TS fault is reported and waits until the battery temperature is within the T1 to T5 range.

At cool temperature (T1-T2), the charge current is reduced to a programmable fast charge current (0%, 20% default, 50%, 100% of ICHG, by JEITA_ISET). At warm temperature (T3-T5), the charge voltage is reduced to 4.1 V or kept at VREG (JEITA_VSET). and the charge current can be reduced to a programmable level (0%, 20%, 50%, 100% default). Battery termination is disabled in T3-T5. The charger provides more flexible settings on T2 and T3 threshold as well to program the temperature profile beyond JEITA. When the T1 is set to 0°C and T5 is set to 60°C, T2 can be programmed to 5.5°C/10°C(default)/15°C/20°C, and T3 can be programmed to 40°C/45.5°C(default)/50.5°C/54.5°C.

When charger does not need to monitor the NTC, host sets TS_IGNORE bit to 1 to ignore the TS pin condition during charging mode. If TS_IGNORE bit is set to 1, TS pin is ignored and the charger ignore TS pin input. In this case, NTC_FAULT bits are 000 to report normal TS status.

BQ25618E BQ25619E JEITA Profile Figure 8-3 JEITA Profile


Equation 1 through Equation 2 describe how to calculate resistor divider values on TS pin.

BQ25618E BQ25619E TS
                                                  Pin Resistor Network Figure 8-4 TS Pin Resistor Network
Equation 1. BQ25618E BQ25619E
Equation 2. BQ25618E BQ25619E

In the equations above, RNTC, T1 is NTC thermistor resistance value at temperature T1 and RNTC, T5 is NTC thermistor resistance values at temperature T5. Select 0°C to 60°C range for Li-ion or Li-polymer battery then

  • RNTC,T1 = 27.28 KΩ (0°C)
  • RNTC,T5 = 3.02 KΩ (60°C)
  • RT1 = 5.3 KΩ
  • RT2 = 31.14 KΩ