AN603 Datasheet PDF

AN603 Vishay Siliconix Designing With the Si9978DW Configurable H-Bridge Controller Wharton McDaniel Currently, there are a number of fully integrated H-bridges on the market. Both bipolar and MOS technologies have been used to create these parts. However, all of them suffer from problems such as limited current handling capability, large package size, and difficulty of assembly. The Si9978DW addresses these problems with an architecture that allows flexible current handling capability, small size, and ease of assembly. Instead of trying to integrate the power devices with the controller on a single piece of silicon, the Si9978DW approach is to separate the controller from the MOSFETs. The benefit is efficient manufacture of both the controller and the MOSFETs, the flexibility to select the optimum MOSFET for the application, and the ability to use surface-mount parts for both the controller and MOSFETs which makes assembly easier. Altogether this means a low cost H-bridge solution. Th...