Circuits & Schematics Supply

Alfredo del Rio and Ana Cao y Paz EDN The use of a linear optocoupler and a capacitor-based power supply yields a simple, yet precise power-line-monitoring system. The circuit in Figure 1 converts the 110 V-ac power-line voltage to an ac output ...

Rajkumar Sharma electronics-lab.com This module is a non-isolated 7 A DC-DC converter. The module can convert any DC voltage between 7 V to 50 V to a 5 V DC with load current up to 7 A (Figure 1). The project has been designed around LM5116 Wide ...

Marián Štofka EDN The circuit in Figure 1 is an alternative to a high-side current monitor in a recent Design Idea (Reference 1). That monitor uses the Analog Devices AD8212 and an external high-voltage bipolar PNP transistor. The ...

by Yuchen Yang and William Xiong Design Note Introduction In traditional isolated high voltage flyback converters, tight regulation is achieved using optocouplers to transfer regulation information from the secondary-side reference circuitry to the ...

Aaron Lager EDN Using LEDs has gained popularity as a method of saving power for general-purpose lighting, but an efficient method for driving them has also become a necessity. For example, Lumileds' Luxeon devices create lighting effects or ...

Henno Normet Electronic Design The amplifier within a standard AV receiver can become a fully adjustable, three-phase power supply by adding a general-purpose op amp, a few passive components, and some standard transformers. If you need an ...

Dave Conrad EDN A typical driver for thermoelectric (TE) cooler applications may use pulse width modulation (PWM) to drive an H-bridge circuit. This scheme works but drives the TE device with very large current pulses. These square waves, which are ...

Aaron Lager EDN Most switch-mode power supplies rely on a PWM (pulse-width-modulated) output that is controlled via voltage feedback. A 555-timer IC can inexpensively perform PWM. The circuit in Figure 1 shows how to turn a 555 PWM circuit into an ...

Gregory Mirsky Electronic Design In [1] a cascode connection of two MOSFETs helped eliminate the Miller effect and significantly improve power factor correction (PFC) performance. Recall that the Miller effect is a very large increase in a ...

Rick Mally Electronic Design The circuit uses the ubiquitous LM431 shunt regulator to implement a second-order Sallen-Key low pass filter together with a level shifte. Designs frequently require the conversion of a microprocessor’s pulse ...