AC-DC-Wandler (ICs)

The BM2P Series was designed for use in AC adapters, home appliances, office equipment, and the like. A low ON resistance super junction MOSFET is built in for significantly improved efficiency, ensuring compliance with the latest Energy Star* standard. Delivers an optimized power supply system for sets of all types.

*：An international environmental leveling system for energy saving in OA equipment

• AC/DC Converter IC Support Page

For 25W adapters, simply replacing the IC itself will boost efficiency to over 87% (compared with sub-87% with conventional products). This can be increased to over 90% by optimizing the circuit (including selecting the right peripheral components). As a result, the ICs easily pass the new EnergyStar 6 requirements for efficiency.

Power consumption during standby with a 25W adapter is less than 20mW at 100VAC and less than 30mW at 230VAC - well below the 100mW requirement set by the Energy Star 6 standard. And further improvements are possible through circuit optimization.

With planar-type MOSFETs commonly used in AC/DC applications, miniaturization is typically difficult due to problems associated with heat dissipation. In contrast, adopting a super junction MOSFET allows for a more compact IC design, including a small surface mount SOP8 package to complement the standard DIP7 type. The SOP8 form factor reduces mounting area by 47% over conventional models.

・PWM Current Mode method
     (PWM frequency: 65kHz, with built-in hopping function)

・Burst operation during light loads / Frequency reduction function

・650V startup circuit and switching SJ MOSFET built-in

・Multiple protection functions
     - Thermal shut down
     - Source pin open/short protection
     - Secondary overcurrent protection (64ms timer auto restore)