ETA3001
www.eta-semi.com 1 Empower, Transcend, Achieve!
ETA3001 Rev 1.2
Inductive Cell Balancer IC with Balancing Current Up to 2A
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.
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
TYPICAL APPLICATION
ETA3001
BATP
HGATE
BIAS
SW
LGATE
BATN
BATC
ISET
1
2
3
4
8
6
75
10uF
10uF
1uH
10nF
optional
10uF
100Ω
Rs
Li
Battery
Li
Battery
+
+
TVS
TVS
Figure 1: Typical Application Circuit
剩余12页未读，继续阅读
资源评论
