SLUSFK8 April   2024 BQ25770G

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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 BQ25770G
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Power-Up Sequence
      2. 7.3.2  MODE Pin Detection
      3. 7.3.3  REGN Regulator (REGN LDO)
      4. 7.3.4  Independent Comparator Function
      5. 7.3.5  Battery Charging Management
        1. 7.3.5.1 Autonomous Charging Cycle
        2. 7.3.5.2 Battery Charging Profile
        3. 7.3.5.3 Charging Termination
        4. 7.3.5.4 Charging Safety Timer
      6. 7.3.6  Temperature Regulation (TREG)
      7. 7.3.7  Vmin Active Protection (VAP) When Battery Only Mode
      8. 7.3.8  Two Level Battery Discharge Current Limit
      9. 7.3.9  Fast Role Swap Feature
      10. 7.3.10 CHRG_OK Indicator
      11. 7.3.11 Input and Charge Current Sensing
      12. 7.3.12 Input Current and Voltage Limit Setup
      13. 7.3.13 Battery Cell Configuration
      14. 7.3.14 Device HIZ State
      15. 7.3.15 USB On-The-Go (OTG)
      16. 7.3.16 Quasi Dual Phase Converter Operation
      17. 7.3.17 Continuous Conduction Mode (CCM)
      18. 7.3.18 Pulse Frequency Modulation (PFM)
      19. 7.3.19 Switching Frequency and Dithering Feature
      20. 7.3.20 Current and Power Monitor
        1. 7.3.20.1 High-Accuracy Current Sense Amplifier (IADPT and IBAT)
        2. 7.3.20.2 High-Accuracy Power Sense Amplifier (PSYS)
      21. 7.3.21 Input Source Dynamic Power Management
      22. 7.3.22 Integrated 16-Bit ADC for Monitoring
      23. 7.3.23 Input Current Optimizer (ICO)
      24. 7.3.24 Two-Level Adapter Current Limit (Peak Power Mode)
      25. 7.3.25 Processor Hot Indication
        1. 7.3.25.1 PROCHOT During Low Power Mode
        2. 7.3.25.2 PROCHOT Status
      26. 7.3.26 Device Protection
        1. 7.3.26.1  Watchdog Timer (WD)
        2. 7.3.26.2  Input Overvoltage Protection (ACOV)
        3. 7.3.26.3  Input Overcurrent Protection (ACOC)
        4. 7.3.26.4  System Overvoltage Protection (SYSOVP)
        5. 7.3.26.5  Battery Overvoltage Protection (BATOVP)
        6. 7.3.26.6  Battery Charge Overcurrent Protection (BATCOC)
        7. 7.3.26.7  Battery Discharge Overcurrent Protection (BATDOC)
        8. 7.3.26.8  BATFET Charge Current Clamp Protection under LDO Regulation Mode
        9. 7.3.26.9  Sleep Comparator Protection Between VBUS and ACP_A (SC_VBUSACP)
        10. 7.3.26.10 High Duty Buck Exit Comparator Protection (HDBCP)
        11. 7.3.26.11 REGN Power Good Protection (REGN_PG)
        12. 7.3.26.12 System Under Voltage Lockout (VSYS_UVP) and Hiccup Mode
        13. 7.3.26.13 OTG Mode Over Voltage Protection (OTG_OVP)
        14. 7.3.26.14 OTG Mode Under Voltage Protection (OTG_UVP)
        15. 7.3.26.15 Thermal Shutdown (TSHUT)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Forward Mode
        1. 7.4.1.1 System Voltage Regulation with Narrow VDC Architecture
        2. 7.4.1.2 Battery Charging
      2. 7.4.2 USB On-The-Go Mode
      3. 7.4.3 Pass Through Mode (PTM)-Patented Technology
      4. 7.4.4 Learn Mode
    5. 7.5 Programming
      1. 7.5.1 SMBus Interface
        1. 7.5.1.1 SMBus Write-Word and Read-Word Protocols
        2. 7.5.1.2 Timing Diagrams
    6. 7.6 BQ25770G 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 ACP-ACN Input Filter
        2. 8.2.2.2 Inductor Selection
        3. 8.2.2.3 Input Capacitor
        4. 8.2.2.4 Output Capacitor
        5. 8.2.2.5 Power MOSFETs Selection
      3. 8.2.3 Application Curves
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
      1. 10.2.1 Layout Example Reference Top View
  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 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • REE|36
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.2.3 Application Curves

BQ25770G Power Up From 28 V
VBUS = 28 V VSYS_MIN=12.3V ISYS=0A
Figure 8-3 Power Up From 28 V
BQ25770G Power Off From 28 V
VBUS = 28V->0V VBAT=14.8V
VSYS_MIN=12.3V ISYS=100mA
Figure 8-5 Power Off From 28 V
BQ25770G PFM Operation
VBUS = 28V VBAT=14.8V
VSYS_MIN=12.3V ISYS=100mA
Figure 8-7 PFM Operation
BQ25770G Switching During Boost Mode
VBUS = 5V VBAT=14.8V
VSYS_MIN=12.3V ISYS=1A
Figure 8-9 Switching During Boost Mode
BQ25770G System Regulation in Buck Mode
VBUS = 28V VBAT=14.8V ISYS=0~6A
Figure 8-11 System Regulation in Buck Mode
BQ25770G System Regulation in Boost Mode
VBUS = 5V VBAT=14.8V ISYS=0~0.5A
Figure 8-13 System Regulation in Boost Mode
BQ25770G Input Current in Buck Boost Mode
VBUS = 15V VBAT=14.8V IINDPM=5A ISYS=0~8A
Figure 8-15 Input Current in Buck Boost Mode
BQ25770G OTG Voltage Ramp Up After Enable
VOTG= 5V VBAT=14.8V IOTG=3A IBUS=1A
Figure 8-17 OTG Voltage Ramp Up After Enable
BQ25770G OTG Load Transient
VOTG= 5V VBAT=14.8V IOTG=5A IBUS=0.3~2.7A
Figure 8-19 OTG Load Transient
BQ25770G Automatic Second Phase Adding and Dropping Under 36-V VBUS
VBUS= 36V ISYS=2~12A
SINGLE_DUAL_TRANS_TH=6A PH_DROP_DEG=1ms
Figure 8-21 Automatic Second Phase Adding and Dropping Under 36-V VBUS
BQ25770G Peak Power Mode VSYS Trigger
VBUS = 28 V IIN_DPM=2A ILIM2_VTH=200%
TMAX=20ms TOVLD=10ms ISYS=1~6A
Figure 8-23 Peak Power Mode VSYS Trigger
BQ25770G Power Up From 5 V
VBUS = 5 V VSYS_MIN=12.3V ISYS=0A
Figure 8-4 Power Up From 5 V
BQ25770G Line Regulation
VBUS = 10V->20V VBAT=14.8V
VSYS_MIN=12.3V ISYS=3A
Figure 8-6 Line Regulation
BQ25770G PWM Operation
VBUS = 28V VBAT=14.8V
VSYS_MIN=12.3V ISYS=2A
Figure 8-8 PWM Operation
BQ25770G Switching During Buck Boost Mode
VBUS = 15V VBAT=14.8V
VSYS_MIN=12.3V ISYS=3A
Figure 8-10 Switching During Buck Boost Mode
BQ25770G System Regulation in Buck Boost Mode
VBUS = 15V VBAT=14.8V ISYS=0~4A
Figure 8-12 System Regulation in Buck Boost Mode
BQ25770G Input Current Regulation in Buck Mode
VBUS = 28V VBAT=14.8V IINDPM=5A ISYS=0~10A
Figure 8-14 Input Current Regulation in Buck Mode
BQ25770G Input Current in Boost Mode
VBUS = 5V VBAT=14.8V IINDPM=3A ISYS=0~2A
Figure 8-16 Input Current in Boost Mode
BQ25770G OTG Voltage Power Off After Disable
VOTG= 5V VBAT=14.8V IOTG=3A IBUS=1A
Figure 8-18 OTG Voltage Power Off After Disable
BQ25770G Dual Phase Current Balance at 36 V 180 W
VBUS= 36V VBAT=14.8V ISYS=12.2A
Figure 8-20 Dual Phase Current Balance at 36 V 180 W
BQ25770G Automatic Second Phase Adding and Dropping Under 28-V VBUS
VBUS= 28V ISYS=2~8A
SINGLE_DUAL_TRANS_TH=5A PH_DROP_DEG=1ms
Figure 8-22 Automatic Second Phase Adding and Dropping Under 28-V VBUS
BQ25770G Peak Power Mode IBUS Trigger
VBUS = 28 V IIN_DPM=2A ILIM2_VTH=200%
TMAX=20ms TOVLD=10ms ISYS=1~6A
Figure 8-24 Peak Power Mode IBUS Trigger