DESCRIPTION FEATURES
ETA3001 is an inductive cell balancer. Unlike
conventional passive balancing technique, ETA3001
utilizes a control scheme with an inductor to shuffle
currents between two cells until the cells are balanced.
Due to the switching nature, the heat and power
dissipation generated in conventional linear balance
technique are greatly reduced. The balance time is
also significantly reduced due to higher balancing
current not being limited by package thermal
dissipation.
ETA3001 consumes only 2μA ultra-low current from
batteries in standby mode, extending the battery shelf
time. The final balanced voltages of both cells are also
highly accurate which enhances the performance and
lifetime for the batteries connected in series. ETA3001
can also be used in multiple cells stacking with even
number of cells. ETA3001 includes protection features
similar to precondition in battery charging, that is when
one cell’s voltage is grossly lower than the other, the
balancing current is reduced to a safe level until the
lower voltage cell is charged up.
ETA3001 is available in DFN2x2-8 package.

FEATURES
 Inductive, switching control scheme
 Up to 90% charger transfer efficiency
 Accurate balanced voltages down to 30mV
 Auto detect unbalance and auto balance
 Low sleeping supply current, 2μA
 Programmable balancing current up to 2A
 Precondition balancing current
 Status indications
 Battery over voltage protection
 Support small size inductor

APPLICATIONS
 Multi-cells System
 Battery Pack
 Portable Equipment and Instrumentation
 Battery Backup Systems
 E-Cigarette