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Texas Instruments - BQ25601D

The BQ25601D is a highly-integrated 3.0-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. It features fast charging with high input voltage support for a wide range of smart phones, tablets and portable devices. Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. Its input voltage and current regulation deliver maximum charging power to battery. The solution is highly integrated with input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and battery FET (BATFET, Q4) between system and battery. It also integrates the bootstrap diode for the high-side gate drive for simplified system design. The I2C serial interface with charging and system settings makes the device a truly flexible solution.


• High-Efficiency, 1.5-MHz, Synchronous Switch-Mode Buck Charger
  - 92% Charge Efficiency at 2 A from 5-V Input
  - Optimized for USB Voltage Input (5 V)
  - Selectable Low Power Pulse Frequency Modulation (PFM) Mode for Light Load Operations
• Supports USB On-The-Go (OTG)
  - Boost Converter With Up to 1.2-A Output
  - 92% Boost Efficiency at 1-A Output
  - Accurate Constant Current (CC) Limit
  - Soft-Start Up To 500-µF Capacitive Load
  - Output Short Circuit Protection
  - Selectable Low Power PFM Mode for Light Load Operations
• Single Input to Support USB Input and High Voltage Adapters
  - Support 3.9-V to 13.5-V Input Voltage Range With 22-V Absolute Maximum Input Voltage Rating
  - Programmable Input Current Limit (100 mA to 3.2 A With 100-mA Resolution) to Support USB 2.0, USB 3.0 Standards
    and High Voltage Adaptors (IINDPM)
  - Maximum Power Tracking by Input Voltage Limit Up to 5.4 V (VINDPM)
  - VINDPM Threshold Automatically Tracks Battery Voltage
  - Auto Detect USB BC1.2, SDP, CDP, DCP and Non-Standard Adaptors
• High Battery Discharge Efficiency With 19.5-mΩ Battery Discharge MOSFET
• 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
• 17-µA Low Battery Leakage Current
• High Accuracy
  - ±0.5% Charge Voltage Regulation
  - ±5% at 1.5-A Charge Current Regulation
  - ±10% at 0.9-A Input Current Regulation
• Create a Custom Design Using the BQ25601D With the WEBENCH® Power Designer

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