DC567A

DC567A is a demonstration circuit for the LTC4053-4.2 USB compatible lithium-ion battery charger with thermal regulation. It shows how to use the LTC® 4410 USB power manager IC in conjunction with a battery charger IC, in this case the LTC4053, to charge a battery from the USB cable. DC567A achieves USB compliant battery charging by measuring the current to the USB application circuit and reducing the charging current in order to hold the input current within the USB specification. Battery charging is controlled by the LTC4053, which is a constant current, constant voltage, timer terminated single Li-Ion charger. The LTC4053 also features a die temperature limit to avoid excessive PCB temperatures.

• Connected to board will be single Li-Ion cell, source of charging power and application load