AO4290A and AON6220 100 V MOSFETs. Source: Alpha and Omega Semiconductor. Both parts are designed to be fully driven with 4.5 V gate drive voltage. The AO4290A is offered in an SO-8 package with a maximum on-resistance (Rdson) of 7.6 mohm at 4.5 V gate drive voltage. The AON6220 is packaged in a low-profile DFN5×6 package with a maximum Rdson of 7.4 mohm at 4.5 V gate drive voltage. The minimum break down voltage is 100 V, which is suitable for use in flyback circuit designs featuring adjustable output voltage, such as an adaptive quick charge for mobile phones and USB PD adapters.
The latest digitally controlled synchronous rectifier ICs provide an option to fully eliminate the Schottky diode paralleled with the synchronous MOSFET. This also requires further reduction of the MOSFET switching loss. The AO4290A and AON6220 are designed to address the demand for higher output power and lower switching loss. With similar specifications provided in both the SO-8 and DFN5×6 packages, the design engineer has more flexibility in selecting the right part in accordance with the target thermal dissipation and manufacturing requirements from the PCB factories.
All the products released are immediately available in production quantities with a lead-time of 12 to 14 weeks. In quantities of 1,000, the AO4290A costs 93 cents, while the AON6220 costs 96 cents.
