ETA3000D2I 2A Inductive Active Battery Balancer (2S Li-Ion/LiFePO4, DFN-8)

Maximize the lifespan and usable capacity of your custom battery packs with the ETA3000D2I inductive active balancer. Traditional passive balancing circuits found on standard BMS boards simply burn off excess voltage as heat using resistors—a slow and highly inefficient process. The ETA3000 revolutionizes this by using an inductive buck-boost topology to actively transfer energy from the higher-voltage cell directly into the lower-voltage cell, dramatically reducing heat generation and wasted energy.

Designed specifically for 2S battery configurations (and easily cascadeable for 3S, 4S, and beyond), this IC can deliver a massive balancing current of up to 2A depending on the external inductor used. This ensures extremely fast voltage equalization, which is critical for high-drain applications like FPV drone batteries, power tools, and custom power banks. Housed in a tiny 2x2mm DFN-8 package, it requires minimal external components, allowing you to design ultra-compact, high-efficiency battery management systems.

Key Features:

• Active Inductive Balancing: Transfers energy between cells rather than dissipating it as heat, offering significantly higher efficiency than traditional passive balancers.

• High Balancing Current: Capable of up to 2A balancing current, quickly equalizing cell voltages even in large-capacity battery packs.

• Universal Chemistry: Works flawlessly with both standard Lithium-Ion/LiPo (4.2V) and LiFePO4 (3.6V) battery chemistries.

• Ultra-Compact Footprint: The microscopic 2x2mm DFN-8 package saves highly valuable PCB space on custom BMS boards.

Specifications:

• Part Number: ETA3000D2I

• IC Type: Inductive Active Battery Balancer

• Supported Cells: 2S (Cascadeable for multi-cell packs)

• Max Balancing Current: Up to 2A

• Standby Current: ~2µA

• Package Type: DFN-8 (2x2 mm, 0.5mm pitch, SMD)