Electronic Design
MOSFETs Handle VoIP Apps

MOSFETs Handle VoIP Apps

Promising designers of VoIP equipment a rugged solution that significantly reduces circuit complexity and cost, the ZXMN15A27K and ZXMN20B28K MOSFETs meet the requirements of the primary switch position in transformer-based Subscriber Line Interface Circuit (SLIC) dc/dc converters in a variety of VoIP applications. These include voice over broadband systems, PBX systems, cable, and DSL gateways. The devices feature breakdown voltages of 150V and 200V, respectively, and will withstand the high pulse avalanche energy and commutation modes in the SLIC environment without the need for additional protection circuitry. Depending on the transformer, the MOSFETs are capable of driving line voltages beyond 150V and supplying multiple subscriber lines at loop lengths exceeding 6 km. The ZXMN20B28K is also capable of low gate drive at logic levels. In TO252-3L packages, pricing for the ZXMN15A27K or ZXMN20B28K is $0.28 each/10,000. DIODES INC., Westlake Village, CA. (805) 446-4800.
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