Chip-scale bi-directional MOSFETs enable higher capacity lithium batteries
The device’s low on-state resistance reduces power loss while its thin chip-scale packaging allows designers to use the space saved to increase battery capacity. Target end-markets include smartphones, tablets, cameras, portable media players, and similar consumer products where size, weight and battery life are all key performance factors.
Designed to minimize on-state resistance for lower power loss, the DMN2023UCB4 delivers an RSS(on) of less than 26 mOhm. In addition, its dual N- channel common-drain configuration particularly suits the charging circuits required for 1- and 2-cell lithium batteries, which commonly use a low-side battery switch. For applications requiring a high-side connection Diodes Incorporated also offers the DMP2100UCB9, which provides a dual P-channel common-source MOSFET design.
The above features coupled with a chip-scale package footprint of 1.8 mm x 1.8 mm and a thickness of <0.4 mm, make this new generation bi-directional MOSFET ideal for battery management, load switch and battery protection applications where smaller form factors are important. Other features include a gate threshold voltage of less than 1 V, which is important to fully enhance the channel under low voltage operation, and built-in gate protection against electrostatic discharge (ESD) voltages of >2 kV.