Linear Technology Corporation (Milpitas, CA) introduced the LTC3350, a supercapacitor charger and backup controller IC that provides all PowerPath control, capacitor stack charging and balancing, and capacitor “health” monitoring to ensure that the backup system is capable of reliable operation. The LTC3350 features a wide 4.5-V to 35-V input voltage range and over 10 A of charge/backup current capability. The device also provides balancing and overvoltage protection for a series stack of one to four supercapacitors. The LTC3350’s synchronous step-down controller drives N-channel MOSFETs for constant current/voltage charging of the capacitor stack at up to 5V per cell. In backup mode, the step-down converter runs in reverse as a synchronous step-up DC/DC to deliver power from the supercapacitor stack to the system supply to be backed up. The LTC3350’s dual ideal diode controller uses N-channel MOSFETs for low loss power paths from the input and supercapacitors to the backup system supply. The device is appropriate for high current 12V ride-through supplies and short-term uninterruptible power supplies (UPS) for:
- Mass storage.
- High availability systems.
For more information visit www.linear.com