In addition the product of on-resistance and gate charge – a key figure of merit (FOM) for MOSFETs in DC/DC converter applications – is also claimed to be the best in class.
The SiR870DP’s low on-resistance of 7.8 mΩ at 4.5 V is the industry’s lowest. The MOSFET also offers a very low on-resistance of 6 mΩ at 10 V. For designers, the device’s lower on-resistance translates into lower conduction losses and reduced power consumption for energy-saving green solutions.
With its industry-low 208 mΩ-nC FOM at 4.5 V, the SiR870DP combines low conduction and switching losses for higher frequency and switching applications. For designers requiring an SO-8 packaged device, the Si4190DY’s on-resistance of 8.8 mΩ at 10 V and 12 mΩ at 4.5 V, in addition to its FOM of 340 mΩ-nC at 10 V and 220 mΩ-nC at 4.5 V, are the industry’s best.
The devices released today are optimized for primary side switching and secondary side synchronous rectification in isolated DC/DC power supply designs for telecom brick and bus converter applications. The MOSFETs’ 4.5 V rating for on-resistance allows a wide range of PWM and gate driver ICs to be considered. By utilizing 5 V rated ICs, gate driver losses can be reduced and the overall design simplified by eliminating the need for a separate 12 V power rail.
The SiR870DP and Si4190DY are 100 % Rg and UIS tested. The MOSFETs are halogen-free according to the IEC 61249-2-21 definition and compliant to RoHS Directive 2002/95/EC.
Samples and production quantities of the new MOSFETs are available now, with lead times of 16 weeks for large orders.
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