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H-Bridge-Slide11

The VNH57 Series is taking the VN770 Series and putting them into M0-5, so customers get the advantages of M0-5 technology in the old configuration. These devices are essentially two high-side drivers and two low-side drivers in a package. They are only connected externally. Additionally, the low-side drivers are independent of each other even though it shows them connected in the diagram, they are actually not connected at the outputs. They have separate pins for everything. Since these are 36V devices they are good for industrial applications. Again, they are limited in their power dissipation capability by the lack of an exposed pad to dissipate heat. They do have analog current sense for the high side switches, so the current can be measured. The M0-5 current sense capability is more accurate. There is shutdown protection on both high and low side switches. This is because the low side switches are OMNIFETs. Notice, in every single one of these drawings there has been resistors between the microprocessor and the device. All of these have resistors protecting the microprocessor and the device from overcurrent.

PTM Published on: 2014-12-19