Digitally Controlled Negative Voltage Supply

Despite the popularity of single-supply ICs, a negative control voltage is still required by some applications. Modern, inverted R-2R ladder DAC and op amp is the solution for this purpose. This approach offers lower supply voltages, higher speed, and smaller packages when compared with older DACs containing standard R-2R ladders. An output swing from 0V to 2.5V is produced by […]

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Variable Power Supply 1.2-55 Volt, Uses Switching Technology for High Efficiency

Designing wide range variable power supply using linear regulator is easy, but suffer terrible efficiency when it should regulate 60 Volt constant sourceĀ  down to 5 Volt or lower, the efficiency would be 5/60 or 8.33% at maximum effort, really bad. Using switching technology, the efficiency can be kept around 70% , and can be higher for the lower input-output […]

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