BQ24721C

• High Efficiency NMOS-NMOS Synchronous Buck Converter With User-Selectable 300 kHz or 500 kHz frequency
• bq24721C Offers Softer Turn-On, Stronger Turn-Off
• SBS-Like⁽¹⁾ SMBus Interface for Control and Status Communications With Host
• Programmable Battery Voltage, Charge Current, and AC Adapter Current via SBS-Like SMBus Interface
• 0.4% Charge Voltage Regulation Accuracy
• 3% Charge Current Regulation Accuracy
• 3% Adapter Current Regulation Accuracy Dynamic Power Management (DPM)
• 2% Accuracy Integrated Charge and AC Adapter 20× Current Amplifier Output
• 3-Cell and 4-Cell Li-Ion Voltage Regulation 9 V, 12 V-14.4 V, 16 V-19.2 V
• Battery Pack Voltage Operating Range 0 V-19.2 V
• AC Adapter Operating Range 8 V-28 V
• 99.5% Max Duty Cycle
• Internal Soft Start
• Integrated 5% 5-V LDO When AC Adapter Applied
• 6-V Drive Supply Voltage for Increased Efficiency
• Reverse Battery to Adapter Discharge Protection
• Battery/Adapter to System Power Selector Function
• Charge and Adapter Overcurrent Protection
• Battery Thermistor Sense, TS, Comparators
• Available in 32-Pin 5x5-mm QFN Package
• APPLICATIONS
  • Portable Notebook Computers
  • Portable DVD Players
  • Webpads, PC Tablets

⁽¹⁾ SBS-Like interface is not 100% SBS compliant. SBS-Like interface is SMBus1.1 complaint but does not support Packet Error Correction (PEC). The control and status registers were changed to simplify and enhance notebook charger control. An 8-bit address (0x12) is used.
PowerPAD is a trademark of Texas Instruments.