The DMN2014LHAB and DMN2011UFX MOSFETs provide a compact, bi-directional low-loss switch for battery-charging circuits, says Diodes Incorporated, for chargers smartphones, tablets, cameras and media players and other portable devices which use one- and two-cell lithium batteries.

They are configured as dual common-drain MOSFETs and, when switched on, allow bi-directional current flow for charging or operation. Switched off they protect the battery by preventing over-charging or excessive current drain. Breakdown rating is 20V, with a low on resistance of R_DS(on) less than 13mΩ (DMN2014LHAB) and 9.5mΩ (DMN2011UFX), to reduce battery power loss in normal operation. Maximum peak current up to 80A allows the switch to briefly handle short-circuit conditions before the protection circuitry kicks in. A low gate threshold voltage, V_GS(th) less than 1V, ensures correct operation even with drive voltages as low as 1.8V, says the company.

The DMN2014LHAB is available in 2 x 3mm DFN2030 package and the DMN2011UFX is offered in the 2 x 5mm DFN2050. The space saved can be used for additional cells and increase the battery’s mAh capacity.