MAX1612/MAX1613
19-4785; Rev 0; 11/98 EVFAOLLULAOTWIOSNDKAITTAMSAHNEUEATL
Bridge-Battery Backup Controllers for Notebooks
General Description
The MAX1612/MAX1613 manage the bridge battery (sometimes called a hot-swap or auxiliary battery) in portable systems such as notebook computers.
They feature a step-up DC-DC converter that boosts 2-cell or 3-cell bridge-battery
voltages up to the same level as the main battery.
This
voltage boosting technique reduces the number of cells otherwise required for a 6cell plus diode-OR bridging scheme, reducing overall size and cost.
Another key feature is a trickle-charge timer that minimizes battery damage caused by constant charging and eliminates tri...