BQ24650 Stand-Alone Synchronous Buck Battery Charge Controller for Solar Power With Maximum Power Point Tracking

1 Features

• Maximum Power Point Tracking (MPPT) capability by input Voltage regulation
• Programmable MPPT setting
• 5-V to 28-V Input solar panel
• 600-kHz NMOS-NMOS Synchronous buck controller
• Resistor programmable float voltage
• Accommodates Li-Ion/Polymer, LiFePO4, lead acid chemistries
• Accuracy
  • ±0.5% Charge voltage regulation
  • ±3% Charge current regulation
  • ±0.6% Input voltage regulation
• High Integration
  • Internal loop compensation
  • Internal digital soft start
• Safety
  • Input overvoltage protection
  • Battery temperature-sensing
  • Battery absent detection
  • Thermal shutdown
• Charge status outputs for LED or host processor
• Charge enable on MPPSET pin
• Automatic sleep mode for low power consumption
  • < 15-μA OFF-state battery discharge current
• Small 3.5 × 3.5 mm² 16-pin QFN package