1 Features

• High Efficiency 4-A, 1.5-MHz Switch Mode Buck Charge
  • 92% Charge Efficiency at 3 A and 91% Charge Efficiency at 4 A Charge Current
  • Optimize for High Voltage Input (9 V / 12 V)
  • Low Power PFM mode for Light Load Operations
• USB On-the-Go (OTG) with Adjustable Output from 4.5 V to 5.5 V
  • Selectable 500-KHz / 1.5-MHz Boost Converter with up-to 2.4 A Output
  • 94% Boost Efficiency at 5 V at 1 A Output
  • Accurate Hiccup Mode Overcurent Protection
• Single Input to Support USB Input and Adjustable High Voltage Adapters
  • Support 3.9-V to 14-V Input Voltage Range
  • Input Current Limit (100 mA to 3.25 A with 50-mA resolution) to Support USB2.0, USB3.0 standard and High Voltage Adapters
  • Maximum Power Tracking by Input Voltage Limit up-to 14V for Wide Range of Adapters
  • Auto Detect USB SDP, CDP, DCP, and Non-Standard Adapters (bq25898)
  • Programmable D+/D- Drivers for Non-Standard Adapter Handshake
• Remote Battery Sensing
• Input Current Optimizer (ICO) to Maximize Input Power without Overloading Adapters
• Resistance Compensation (IRCOMP) from Charger Output to Cell Terminal
• Highest Battery Discharge Efficiency with 5-mΩ Battery Discharge MOSFET up to 9 A
• Integrated ADC for System Monitor
  (Voltage, Temperature, Charge Current)
• Narrow VDC (NVDC) Power Path Management
  • Instant-on Works with No Battery or Deeply Discharged Battery
  • Ideal Diode Operation in Battery Supplement Mode
• BATFET Control to Support Ship Mode, Wake Up, and Full System Reset
• Flexible Autonomous and I²C Mode for Optimal System Performance
• High Integration includes all MOSFETs, Current Sensing and Loop Compensation
• 12-µA Low Battery Leakage Current to Support Ship Mode
• High Accuracy
  • ±0.5% Charge Voltage Regulation
  • ±5% Charge Current Regulation
  • ±7.5% Input Current Regulation
• Safety
  • Battery Temperature Sensing for Charge and Boost Mode
  • Thermal Regulation and Thermal Shutdown
• Available in 2.8-mm x 2.5-mm 42-Ball DSBGA Package

2 Applications

• Smart Phone
• Tablet PC
• Portable Internet Devices

3 Description

The bq25898, bq25898D are highly-integrated 4-A switch-mode battery charge management and system power path management devices for single cell Li-Ion and Li-polymer battery. The devices support high input voltage fast charging.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

4 Revision History

Changes from A Revision (December 2016) to B Revision

• Full data sheet to product folder Go

Changes from * Revision (March 2016) to A Revision

• Changed 93% to 94% in FeaturesGo
• Changed anode to cathode in BTSTGo
• Changed cathode to anode in REGNGo
• Changed falling to rising in t_{ACOV_RISING} test conditions in Electrical CharacteristicsGo
• Deleted USB SDP (USB100) and the OTG Pin column from Table 3 and Table 4Go
• Changed VREF to VREGN in Equation 2 Go
• Changed VREF to VREGN in Figure 18 Go
• Changed 260 Ω to 232 Ω in Input Current Limit on ILIM Go
• Added note to Figure 49 Go