Summit SMB328A and SMB328B Programmable Battery Charger ICs

Summit Microelectronics announced the SMB328A and SMB328B programmable battery charger integrated circuits (IC) for single-cell Li-Ion, Li-Polymer, and Li-FePO4 powered systems. The SMB328A and SMB328B enable engineers to create slim industrial designs with faster charging times. The SMB328A and SMB328B are available now in production quantities. The SMB328A is priced at $1.28 and the SMB328B is priced at $1.23 each in quantities of 10,000 units.

Summit Microelectronics SMB328A and SMB328B programmable battery charger integrated circuits (IC) for single-cell Li-Ion, Li-Polymer, and Li-FePO4 powered systems

SMB328A and SMB328B Battery Charger ICs Features

  • SMB328A with I2C and SMB328B with pin control
  • Automatic input current limit
  • USB or AC input with programmable input current limiting
  • Up to 1.2A continuous charging current from AC adapter
  • Up to 750mA charging current from 500mA USB port using automatic TurboCharge mode
  • +4.00 to +6.3V input range (+20V input protected)
  • USB On-the-Go Power support for USB OTG enabled devices (+5V reverse output @ 500mA)
  • 50mA LDO output for dead battery boot-up
  • Analog output voltage for direct charge current measurement
  • Reverse current blocking
  • High-efficiency 3MHz current-mode step-down regulator
  • Integrated frequency compensation and power MOSFETs
  • High-accuracy float voltage regulation: 1%
  • Supports JISC8714 and JEITA standards
  • Digital programming of all major parameters via I2C interface (One-time programmable for default, non-volatile settings)
    • Fast charge voltage threshold, float voltage
    • Pre-charge, fast charge, termination current
  • Status register monitors and flags charger operation
    • Charge in-progress/termination
    • Charge timer fault
    • Over-current limiting
    • UV/OV detection/shutdown
  • CSP-20 package (0.4mm pitch lead-free)

More info: Summit Microelectronics