.. 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 ...
.. you must also accommodate the modest heat dissipation limits of these small devices. However, the maximum current (and power) capabilities can be extended virtually without limit by the simple ploy shown in Figure 2. Figure 2. Booster ...
.. operating point. This is also previously seen in “Improve the accuracy of programmable LM317 and LM337-based power sources” ( Ref. 2 ) and numerous other places. I’ll refer to his DI as “the DI” in ...
.. feedback loop. R3 provides a trickle of current, a few hundred nanoamps, sufficient to jumpstart (trigger?) the loop when power is first applied. To program the source for a chosen output current (I O ). If I O 5 mA, then: R1 = 1.30/I O R2 ...
.. amplifying stage feeding a pitch-linear VCO (PLVCO). It also senses when contact has been made, and so draws no power when inactive. Figure 1. A power switch, an amplifying stage with some careful offsets, and a pitch-linear VCO ...
.. That task is usually accomplished with an optocoupler, but optocouplers have limitations they consume quite a bit of power from the sensing side, they are relatively slow, and the light emitter's aging reduces the current-transfer ...
.. Figure 1) or a negative (Figure 2) polarity source, but not both from the same circuit. Figure 1. A typical three-wire [power supply (PS), ground, and load] precision positive current source offering an accuracy of 1% or better. The ...
.. chip integrates a powerful N-channel MOSFET that can handle up to 5 A of switching current, making it suitable for medium-power applications. The XL6019 includes several built-in features for reliable operation: Soft-start function to ...