LTC3350EUHF#PBF Description
The LTC3350EUHF#PBF is a backup power controller that can charge and monitor a series stack of one to four supercapacitors. The LTC3350EUHF#PBF’s synchronous step-down controller drives N-channel MOSFETs for constant current/constant voltage charging with programmable input current limit. In
addition, the step-down converter can run in reverse as a step-up converter to deliver power from the supercapacitor stack to the backup supply rail. Internal balancers eliminate the need for external balance resistors and each capacitor has a shunt regulator for overvoltage protection.
LTC3350EUHF#PBF Features
High-Efficiency Synchronous Step-Down CC/CV Charging of One to Four Series Supercapacitors
Step-Up Mode in Backup Provides Greater Utilization of Stored Energy in Supercapacitors
14-Bit ADC for Monitoring System Voltages/ Currents, Capacitance and ESR
Active Overvoltage Protection Shunts
Internal Active Balancers—No Balance Resistors
VIN: 4.5V to 35V, VCAP(n): Up to 5V per Capacitor, Charge/Backup Current: 10+A
Programmable Input Current Limit Prioritizes System Load Over Capacitor Charge Current
Dual Ideal Diode PowerPath™ Controller
All N-FET Charger Controller and PowerPath Controller
Compact 38-Lead 5mm × 7mm QFN Package
AEC-Q100 Qualified for Automotive Applications
LTC3350EUHF#PBF Applications
High Current 12V Ride-Through UPS
Servers
Mass Storage
High Availability Systems
