DC2220A

DC2220A demonstration circuit is a 2A, bidirectional charger/regulator featuring LTC®3643, a bidirectional synchronous step-up charger and step-down converter. DC2220A implements backup by charging a storage capacitor up to 40V in boost mode, when I/P voltage is present. It discharges storage capacitor in buck mode, providing a regulated load voltage of 3 to 17V (set to 5V), when the I/P is interrupted. Its wide voltage range, both in capacitor charger mode and in system backup mode, makes it well suited to variety of applications. Ability of LTC3643 to boost an I/P rail to a relatively high voltage of 40V, combined w/ DC2220 option of adding external capacitor banks, makes this regulator an excellent choice for energy storage applications. DC2220A features automatic switching from charge to backup mode, 2A I/P current limit during charging, ability to set max current in backup mode of operation, Burst Mode® operation, fast 1MHz switching frequency, and open-collector outputs.

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