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12V Input to 5V Outputs High Peak-Power & Backup Supply using Two Supercapacitors with Input Voltage Monitoring 12V Power Ride Through Using Six 10F, 2.7V Supercapacitors in Series with Front End Flyback 12V Power Ride-Through Application Using Six Supercapacitors in Series and Voltage Supervisor 12V to 5V/3.3V High Peak Power Supply using Two Supercapacitors 3 x AA Alkaline to High Peak Power 3.3V at 2A Using Two Supercapacitors 3.3V at 1.5A from 5V Peak-Power & Back-up Supply using Two Supercapacitors 5V Power Ride-Through Application Using Two Series Connected 10F, 2.7V Supercapacitors Charged to 4.8V That Can Hold Up 20W for 1.42 seconds Complete Energy Utilization Maximizes Run Time of Supercap Ride-Through Application Dual Supercapacitor Backup Power Supply, 0.5V to 5V Embedded Automotive (6V to 36V Input) to 5V/3.3V/1.8V/1.2V Output Peak-Power Controller using Two Supercapacitors High Current USB Battery and Supercapacitors Charger with Power Path Control Li-Ion Backup Supply Li-Ion High Peak Power Battery Buffer Using Two Supercapacitors Power Backup System Using Supercapacitors Redundant USB & 3xAA High Peak Power Battery Supplies using Two Supercapacitors Solar Powered Super Capacitor Charger with MPPT Supercap-Based Power Ride-Through Circuit Maximizes Run Time Using an Energy Scavenging Scheme Supercapacitor Energy Storage System for Data Backup USB to High Peak Power 3.3V Supply Using Two Supercapacitors
The LTC4425 is a constant-current/constant-voltage linear charger designed to charge a 2-cell supercap stack from either a Li-Ion/Polymer battery, a USB port, or a 2.7V to 5.5V current-limited supply. The part operates as an ideal diode with an extremely low 50mΩ on-resistance making it suitable for high peak-power/low average power applications. The LTC4425 charges the output capacitors to an externally programmed output voltage in LDO mode at a constant charge current, or to VIN in normal mode with a smart charge current profile to limit the inrush current until the VIN to VOUT differential is less than 250mV. In addition the LTC4425 can be set to clamp the output voltage to 4.9V or 5.4V.
