Ideas for Design: Vol. 2 No. 2 (.PDF Download)

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We packed in four Ideas for Design in this issue.

We start with a circuit that uses pulsed current to check transistor hFE on an oscilloscope. The circuit creates the biasing conditions specified by the transistor’s manufacturer. Next we have a switching power supply that was devised to ensure high-side FET gate control, particularly in light of a wildly floating high-side rail. The design’s “VeeDrive” delivers a sharp and muscular square-wave that’s robust enough to drive several charge pumps. A simple two-transistor circuit enables that control and provides over-voltage protection. It is handy for low-voltage microcontrollers often need to control higher-voltage loads via high-side switching. Finally we have a smart switch design that adds a few standard, low-cost components to a basic driver that you can enhance to provide short-circuit protection. It also has built-in diagnostics.

These links are to the articles while the Download button provides access to the PDF ebook with all these articles.

• Test Setup Checks Transistors' hFEs When Tight Control Is Important
• Multiple Power Supplies Fortify High-Side Gate Control
• High-Side Switch Provides Overvoltage Protection With Only Four Components
• Add Short-Circuit Protection, Diagnostics To Automotive High-Side/Low-Side Driver