Circuits & Schematics - Supply

This circuit acts as an AC/DC relay with a rating up to 50 volts peak and up to 10 Amps of current. The differential oscillator supplies voltage to the gates of the two FETs with good isolation will drawing only 1.5 mA of current. Materials on the ...

Various designs for current mirror circuits have been an active topic recently here in Design Ideas (DIs). Usually, the mirror designer’s aim is to make the mirror’s input and output currents accurately equal, but Figure 1 shows one ...

Stephen Woodward’s “Ignoring the regulator’s reference” ( Ref. 1 ) Design Ideas (DI) (see Figure 1) is an excellent, working example of how to include a circuit in the feedback loop of an op amp to support the stabilization ...

Recently, frequent Design Idea (DI) author Christopher Paul showcased an innovative and high performance true-two-wire current source using a depletion mode MOSFET as the pass device in “A precision, voltage-compliant current source” ( ...

DAC control (via PWM or other source) of regulators is a popular design topic here in editor Aalyia Shaukat’s Design Ideas (DIs) corner. There’s even a special aspect of this subject that frequently provokes enthusiastic and ...

An interesting analog design problem is the precision current source. Many good designs are available, but most are the three-wire types that can be used as a positive (see Figure 1) or a negative (Figure 2) polarity source, but not both from the ...

This project features a compact and efficient DC-DC buck-boost converter, based on the XL6019 chip, designed to maintain a stable 12 V output over a wide input voltage range of 9 V to 30 V. The XL6019 is a high-performance switching regulator ...

An adjustable load in Figure 1 provides a constant-current load for testing power supplies and batteries. It allows you to set the load current to up to 1.05 A, using a potentiometer, and displays the current on a three-digit LED display controlled ...

I have modified several commercial solar garden lights over the years. I switch out the LED, solar panel, battery pack and control circuit. The result is a much better overall light. One of my disappointments in using store-bought garden light ...

“Gold-plated” without the gold plating Alright, I admit that the title is a bit over the top. So, what do I mean by it? I mean that: The application of PWM control to a regulator does not significantly degrade the inherent DC accuracy ...