Circuits & Schematics - Power - 7

Most electronics today requires multiple supply voltages four or more rails is not uncommon. But if you're using multiple, unsynchronized DC-DC converters, you've not only got a sub-optimal design, you're asking for trouble. This Design ...

Domenico Di Mario, Italy digilander.libero.it/bubblegate/ecircuit3.html This circuit was specifically designed to recharge alkaline cells. The unusual connection of the transistor in each charging unit will cause it to oscillate, on and off, thus ...

Sam Young, Afshin Odabaee Linear Technology Design Note 546 Introduction The top side of a typical system board, such as a PCIe card, is densely populated with FPGAs/ASICs/ microprocessors, transceivers, connectors, memory ICs and DC/DC regulators, ...

Chapin Wong, Maxim Integrated Application Note 5978 Certain applications require the use of a negative voltage reference, which is usually not readily available. A common way to generate a negative voltage has been to use an operational amplifier ...

Bjoy Santos EDN Regardless of its color, an LED's light output varies as a function of forward current and ambient temperature. As Figure 1 shows, an LED's light output can vary by as much as 150% over its operating-current range. In response, a ...

Design Note 445 Introduction Once relegated to the hinterlands of low cost indicator lights, the LED is again in the spotlight of the lighting world. LED lighting is now ubiquitous, from car headlights to USB-powered lava lamps. Car headlights ...

Joel Shetton EDN The circuit in Figure 1 delivers programming voltages to an EEPROM under the control of an external DAC (not shown). You can replace the DAC with a potentiometer to create a general-purpose power supply operating from 12 V and able ...

Contemporary power supplies use switching techniques to achieve the desired output voltage from the primary source. Switching power supplies, however, are often too noisy to be used in sensitive analog circuits. You may find linear power supplies ...

Mike Shriver, Linear Technology Design Note 543 The LTC7138 is a 400 mA step-down regulator that can operate over an input voltage range of 4 V to 140 V, ideal for industrial, telecom, automotive and other applications subject to harsh line ...

Common methods of reverse-voltage protection employ diodes to prevent damage to a circuit. In one approach, a series diode allows current to flow only if the correct polarity is applied (Figure 1). You can also use a diode bridge to rectify the ...