SLUSG28 August   2025 BQ25176K

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Device Power Up from Input Source
        1. 6.3.1.1 ISET Pin Detection
        2. 6.3.1.2 VSET Pin Detection
        3. 6.3.1.3 Charger Power Up
      2. 6.3.2 Battery Charging Features
        1. 6.3.2.1 Lithium-Ion Battery Charging Profile
        2. 6.3.2.2 Input Voltage Based Dynamic Power Management (VINDPM)
        3. 6.3.2.3 Charge Termination and Battery Recharge
        4. 6.3.2.4 Charging Safety Timers
        5. 6.3.2.5 Battery Temperature Qualification (TS Pin)
      3. 6.3.3 Status Outputs ( PG, STAT)
        1. 6.3.3.1 Power Good Indicator (PG Pin)
        2. 6.3.3.2 Charging Status Indicator (STAT)
      4. 6.3.4 Protection Features
        1. 6.3.4.1 Input Overvoltage Protection (VIN_OV)
        2. 6.3.4.2 Output Overvoltage Protection (VOUT_OVP)
        3. 6.3.4.3 Output Overcurrent Protection (IOUT_OCP)
        4. 6.3.4.4 Thermal Regulation and Thermal Shutdown (TREG and TSHUT)
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown or Undervoltage Lockout (UVLO)
      2. 6.4.2 Sleep Mode
      3. 6.4.3 Active Mode
        1. 6.4.3.1 Standby Mode
      4. 6.4.4 Fault Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Li-Ion Charger Design Example
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Third-Party Products Disclaimer
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DSG|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.3.2.5 Battery Temperature Qualification (TS Pin)

While charging, the device continuously monitors battery temperature by sensing the voltage at the TS pin. A negative temperature coefficient (NTC) thermistor should be connected between the TS and GND pins (recommend: 103AT-2). If temperature sensing is not required in the application, connect a fixed 10kΩ resistor from TS to GND to allow normal operation.

The TS function for BQ25176K is designed to follow the JEITA temperature standard for Li-Ion and Li-Poly batteries; charge current (ISET) and regulation voltage (VREG) are reduced based on battery temp (TS). There are four thresholds, Hot-55C, Warm-45C, Cool-10C and Cold-0C.

Normal operation occurs between 10°C and 45°C, charge current and voltage will be the normal values. When battery is in the Cool temperature range, between 0°C and 10°C, the charger current level is 20% of ISET value and regulation voltage is not changed. When the battery is in the Warm temperature range, between 45°C and 55°C, ISET is reduced by 50% and regulation voltage is reduced to 4.1V for VSET settings greater than 4.1V. Regulation voltage is not reduced during the Warm region for VSET settings less than 4.1V. Charge is suspended below Cold temp of 0°C and above Hot temp of 55°C. When charge is suspended device enters the STANDBY state, and blinks the STAT pin. Once battery temperature returns to normal conditions, charging resumes automatically. See Figure 6-3.

When charge current is reduced during Cool or Warm temp the safety timer runs at half the clock rate.

BQ25176K Standard JEITA Profile figureFigure 6-3 Standard JEITA Profile figure

In addition to battery temperature sensing, the TS pin can be used to disable the charger at any time by pulling TS voltage below VTS_ENZ. The device disables the charger and consumes ISD_IN_TS from the input supply. After the TS pin pull-down is released, the device may take up to tTS_DUTY_OFF to turn the ITS_BIAS back on. After the source is turned on, the TS pin voltage will go above VTS_EN, and re-enable the charger operation. The device treats this TS pin toggle as an input supply toggle, triggering Device Power Up From Input Source (Section 6.3.1).