.. DC load is an essential testing tool for any electronic enthusiast, especially for testing and repairing power supplies. An adjustable DC load can limit the current at any desired level, which makes it suitable to perform ...
.. contributor R. Jayapal recently shared an interesting Design Idea (DI) for power supply control and sequencing in MCU-based applications that combine analog and digital circuitry: “Short ...
.. Q1 extends Z1’s 15 mA max current limit while also reducing thermal effects. The net result holds Z1’s maximum power dissipation to single-digit milliwatts. With 0.1% precision R1 and R2 and the 0.5% tolerance TLV431B , better ...
.. along with a few passive components, to translate an input 0-20 mA current source (say from a sensor with a separate power source that outputs a 0-20 mA signal current) into a 4-20 mA two-wire transmitter current loop (a standard 2 ...
.. the AL17150 high-voltage step-down controller chip. Figure 1. Schematic diagram transformerless 85-260 VAC to 12 VDC-0.2 A power supply. According to the datasheet of the AL17150: “The AL17150-10B is a universal high-voltage input ...
.. at 5 VDC, analog circuits operate generally at either 12 or 15 VDC. In some systems, it may be necessary to switch on power supplies in sequence, first 5 VDC to digital circuits and then 15 VDC to analog circuits. During switch-off, ...
.. Idea detects short-circuit faults or excess-current conditions in line-operated equipment, such as a UPS (uninterruptible power supply), across an isolation boundary. If the load current rises higher than a predetermined level, the circuit ...
.. months back, frequent DI contributor Nick Cornford showed us some clever circuits using the TDA7052A audio amplifier as a power oscillator. His designs also demonstrate the utility of the 7052’s nifty DC antilog gain control input: ...
.. chip. This chip is a 3 W+3 W Hi-Fi Class-D amplifier that can operate with only a single 5 V supply. The maximum output power can be achieved using 4-ohm speakers. According to the datasheet: “The PAM8403 is a 3 W, class-D audio ...