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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...] |
The ADT74821 is a three-channel digital thermometer and undertemperature/overtemperature alarm for PCs and thermal management systems. It can measure the temperature in two remote locations, such as in the remote thermal diode in a CPU or GPU, or using a discrete diode connected transistor. This device also measures its own ambient temperature.
One feature of the ADT7482 is series resistance cancellation where up to 1.5 k (typical) of resistance in series with each of the temperature monitoring diodes can be automatically cancelled from the temperature result, allowing noise filtering. The temperature of the remote thermal diodes and ambient temperature can be measured accurate to ±1°C. The tempera-ture measurement range, which defaults to 0°C to 127°C, can be switched to a wider measurement range of from 55°C to +150°C.
The ADT7482 communicates over a 2-wire serial interface compatible with system management bus (SMBus) standards. The default address of the ADT7482 is 0x4C. An ALERT output signals when the on-chip or remote temperature is outside the programmed limits. The THERM output is a comparator output that allows on/off control of a cooling fan. The ALERT output can be reconfigured as a second THERM output if required.
1 Protected by U.S. Patents 5,195,827, 5,867,012, 5,982,221, 6,097,239, 6,133,753, 6,169,442, 7,010,440, other patents pending.Original text is here