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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, May 19, 2006 Allegro MicroSystems, Inc. announced today the first device in a planned series of low-voltage motor drivers targeted at the portable market. Allegro’s A3901 is a dual H-bridge low-voltage motor driver capable of operating one stepper motor or two DC motors. MOSFET output stages substantially reduce the voltage drop and the power dissipation of the outputs of the A3901 compared to typical drivers with bipolar transistors.
The A3901 is designed for portable applications with a power off (sleep mode) current of 50 nA (typical) and an operating voltage range of 2.5 V to 5.5 V. Output current can be regulated by pulse width modulating (PWM) the inputs. Both H-bridges can be paralleled for higher current operation. Allegro’s A3901 offers a very small package size, low operating voltage and low voltage drop MOSFET outputs. Internal circuit protection includes thermal shut down with hysteresis, transient-suppression diodes and crossover current protection.
The A3901 is supplied in lead-free (100% matte tin leadframe) ten-lead MLP power package (3 x 3 x 0.75 mm) with exposed thermal pad (suffix EJ).
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