Summit SMB136 and SMB137B Programmable Battery Charger ICs

Summit Microelectronics announced the SMB136 and SMB137B programmable battery charger integrated circuits (ICs). The SMB136 and SMB137B feature CurrentPath technology, dual input source (USB or AC/DC) with arbitration, dual output for system and battery, and system operation with a dead or missing battery. Both ICs support USB 2.0 Specification, USB On-The-Go Supplement, USB Battery Charging Specification 1.0, IEEE1725 Standard, Chinese USB Charging Specification, and others. Both products are available now in production quantities. The SMB136 is priced at $1.27 and the SMB137B is priced at $1.36 each in quantities of 10,000 units.

Summit SMB136 Programmable Battery Charger

Summit SMB136 and SMB137B Programmable Battery Chargers Features

  • USB and AC Input with Automatic Input Selection (SMB137B)
  • CurrentPath for Independent System and Battery Charging Operation
  • TurboCharge for 50% Current Gain from Current-limited Power Sources
  • Automatic Charger Input Current Adjustment based on Wall Adapter Current Limit
  • Automatic Power Source Detection per USB 1.0 Charging Specification
  • Integrated USB On-the-Go Power Support (+5V @ 500mA)
  • “Low-Battery Recovery” Mode for Instant “Dead Battery” Power On and Extended Talk/Standby Time
  • +3.5V to +6.2V Operating Input (+18V Protection)
  • 3MHz Switch-Mode Operation (Chip Inductors)
  • Very low reverse leakage and shutdown current
  • I2C Programmable (Volatile and Non-volatile)
    • Fast/Pre-Charge/Termination Current
    • Float Voltage
    • Pre-Charge/Dead-battery Thresholds
  • Built-in Safety – supports IEEE 1725 standard
    • Input OV Protection to +18V
    • Battery OV/OC Protection
    • Trickle Charge for Deeply-Discharged Cells
    • Watchdog and Safety Timers
    • Digital Fault Monitors
    • Battery Temperature Monitor
  • 3.0mm x 2.5mm CSP Packaging
Summit SMB137B Programmable Battery Charger

The SMB136 and SMB137B are the only battery charger ICs with CurrentPath to detect the input source type (USB host/hub, AC/DC, etc.) and automatically optimize operation for the fastest and safest battery charging. Both ICs meet the European Union Memorandum of Understanding, issued on June 29th, 2009, for standardized mobile phone chargers.

The SMB136 and SMB137B are ideal for portable devices — such as mobile phones, smart phones, portable media/MP3 players (PMP), portable GPS navigation devices, portable game consoles, and digital cameras/camcorders (DSC/DCC). The features and integration of the SMB136 and SMB137B make them especially suited for portable devices that require operation even with a missing battery, utilize higher-capacity batteries and feature very compact industrial designs.

More information: Summit SMB136 and SMB137B Programmable Battery Charger ICs (pdf)