Circuits & Schematics - Power - 5

All dedicated current-sense amplifiers provide high-side sensing on a positive supply, but you can adapt such circuits for monitoring a negative supply (Figure 1). The positive-supply pin, V+, connects to the system's positive supply, and the ...

Matthew Grant, Linear Technology Design Note 556 Introduction The LT®3952 monolithic LED driver includes a 4 A, 60 V DMOS power switch, excellent for driving high current LEDs in buck mode. Among its many features is an input current sense ...

Figure 1 shows a power supply that delivers 5 V from a 12 V battery. With only a few components, the supply copes with all the automotive transients that ISO (International Organization for Standardization) 7637-1 lists without the need for a bulky ...

A good, reliable and easy to use dc power supply is probably the most important thing for every electronics hobbyists. Since a proper electronically stabilized power supply is crucial for almost all microcontroller-related diy projects, here we are ...

Figure 1a shows a latching circuit based on an optocoupler, IC 1 . If the off switch remains closed, pressing the on switch powers the LED in the optocoupler. Thus, the transistor in IC 1 turns on. You can now release the on switch, and the ...

When electronic testing requires an adjustable current source, you must often build that piece of test equipment in the lab. You can easily make such a current source from a standard force-sense lab power supply (Figure 1). The circuit requires an ...

The circuit in Figure 1 is a good choice if you need a power supply with high efficiency and you don't want to use expensive dc/dc-converter ICs. The heart of the circuit is IC 1 , the common, inexpensive LM7805 linear regulator. The external ...

Fran Hoffart, Linear Technology Design Note 491 Introduction Advances in low power electronics now allow placement of battery-powered sensors and other devices in locations far from the power grid. Ideally, for true grid independence, the batteries ...

You use a JFET's self-biasing characteristics to build a dc/dc converter that operates from power sources such as solar cells, thermopiles, and single-stage fuel cells, all of which deliver less than 600 mV and sometimes as little as 300 mV. ...

Raymond Zheng, Linear Technology EDN The demand for negative-voltage power supplies is increasing with the popularity of applications for portable devices. It can be expensive and relatively complicated to generate a negative supply from a positive ...