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News
2A Buck-Boost Supercapacitor Charger Features Bidirectional Operation for Fast Charging & System Backup
2015-06-16 | ReturnThe LTC3110's active charge balancing eliminates the constant drain of dissipative external ballast resistors, ensuring charging even with mismatched capacitors, and less frequent recharge cycles. Programmable maximum capacitor voltage regulation actively balances and limits the voltage across each capacitor in the series stack to one-half of the programmed value, ensuring reliable operation as capacitors age and develop mismatched capacities. The low RDS(ON), low gate charge synchronous switches provide high efficiency conversion to minimize the charging time of storage elements. The LTC3110 is ideal for safely charging and protecting large capacitors in backup power applications such as servers and RAID systems, and RF systems with battery/capacitor backup. |
The LTC3110 is housed in compact, thermally enhanced 24-lead and TSSOP 4mm x 4mm QFN packages, both featuring E- and I-grade operation from -40°C to 125°C, and up to 150°C for the high reliability H grade. Pricing for the E-grade device starts at $4.45 each in 1,000-piece quantities. For more information, visitwww.linear.com/product/LTC3110.
Summary of Features: LTC3110
- VCAP Operating Range: 0.1V to 5.5V
- VSYS Operating Range: 1.71V to 5.25V
- Automatic Switchover from Charge to Backup Mode
- Programmable ±2% Accurate Charge Input Current Limit from 125mA to 2A
- ±1% Backup Voltage Accuracy
- Automatic Backup Capacitor Balancing
- Fixed 1.2MHz Frequency Switching
- Burst Mode® Operation: 40µA IQ
- Extra Programmable Multipurpose Comparator with Open-Collector Output
- Open-Collector Outputs to Indicate Direction of Operation & End of Charge
- Low Profile TSSOP-24 & 4mm x 4mm QFN-24 Packages
The USA list pricing shown is for budgetary use only. International prices may differ due to local duties, taxes, fees and exchange rates.
Source:http://www.linear.com/