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Electronic Engineering News Digest |
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Siliconix Releases First 20-V and 30-V N-Channel TrenchFET Gen III Power MOSFETs WithTurboFET TechnologyThe 20-V SiS426DN device offers the industry's lowest on-resistance times gate charge for a device with this voltage rating in the 3-mm by 3-mm PowerPAK® 1212-8 footprint. This key figure of merit (FOM) for MOSFETs in dc-to-dc converters is 76.6 m-nC at 4.5 V and 117.60 m-nC at 10 V for the SiS426DN, which features a low typical gate charge of 13.2 nC at a 4.5-V gate drive and 28 nC at a 10-V gate drive. [Read more...] |
Worcester, MA – June 4, 2008 Allegro® introduces a new automotive grade three-phase MOSFET pre-driver IC targeted at automotive and industrial applications. This new device is a third generation three-phase driver that includes enhanced performance and operational features over its predecessors. Allegro’s new robust design is ideal for systems that use sinusoidal control of the motor phase currents. This commutation method provides smooth operation reducing audible noise and minimizing torque ripple at the load.
Adoption of three-phase BLDC motors in automotive and industrial applications is growing rapidly in the marketplace. Allegro has addressed this particular need by introducing the A4935 device. This new device integrates a regulating charge pump which provides full gate drive capability for battery voltages (Vbb) down to 7 V and reduced gate drive for battery voltages as low as 5.5 V. It also includes performance enhancements of the current sense amplifier, as well as better fault diagnostics and reporting to decode and identify faults. Features such as top-off charge
pump and boot strap charge management make this new device much easier to manage in terms of ensuring an adequate boot capacitor charge under varying PWM conditions.
Allegro’s A4935KJP-T is supplied in a 48L eLQFP small profile thermally efficient exposed pad package.
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