DESCRIPTION
The bq24153/6/8 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The IC integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.

FEATURES
• Charge Faster than Linear Chargers
• High-Accuracy Voltage and Current Regulation
   – Input Current Regulation Accuracy: ±5%
      (100 mA and 500 mA)
   – Charge Voltage Regulation Accuracy:
      ±0.5% (25°C), ±1% (0°C to 125°C)
   – Charge Current Regulation Accuracy: ±5%
• Input Voltage Based Dynamic Power
   Management (VIN DPM)
• Bad adaptor detection and rejection
• Safety limit register for maximum charge
   voltage and current limiting
• High-Efficiency Mini-USB/AC Battery Charger
   for Single-Cell Li-Ion and Li-Polymer Battery
   Packs
• 20-V Absolute Maximum Input Voltage Rating
• 9.0-V Maximum Operating Input
   Voltage-bq24156
• 6-V Maximum Operating Input
   Voltage-bq24153/8
• Built-In Input Current Sensing and Limiting
• Integrated Power FETs for Up To 1.5-A Charge
   Rate-bq24156, 1.25A-bq24153/8
• Programmable Charge Parameters through
   I2C™ Compatible Interface (up to 3.4 Mbps):
   – Input Current Limit
   – VIN DPM Threshold
   – Fast-Charge/Termination Current
   – Charge Regulation Voltage (3.5 V to 4.44 V)
   – Low Charge Current Mode Enable/Disable
   – Safety Timer with Reset Control
   – Termination Enable/Disable
• Synchronous Fixed-Frequency PWM
   Controller Operating at 3 MHz With 0% to
   99.5% Duty Cycle
• Automatic High Impedance Mode for Low
   Power Consumption
• Robust Protection
   – Reverse Leakage Protection Prevents
      Battery Drainage
   – Thermal Regulation and Protection
   – Input/Output Overvoltage Protection
• Status Output for Charging and Faults
• USB Friendly Boot-Up Sequence
• Automatic Charging
• Power Up System without Battery bq24158
• Boost Mode Operation for USB OTG:
   (bq24153/8 only)
   – Input Voltage Range (from Battery): 2.5 V to 4.5 V
   – Output for VBUS: 5.05 V/ 200 mA
• 2.1 mm x 2 mm 20-Pin WCSP Package

APPLICATIONS
• Mobile and Smart Phones
• MP3 Players
• Handheld Devices