Circuits & Schematics Supply - 14

Power control using the linear region of an active device, such as a MOSFET, is not an efficient option. However if the range of power control is restricted to the lower or upper end of the range, using the linear region is not a bad choice. For ...

Available from multiple sources, the UC384x family of current-mode, PWM (pulse-width-modulated) power-supply controllers offers good performance and has spawned a variety of similar ICs. All members of the UC384x family and its variants share a ...

There are many circuits of soldering station controllers, but absolutely all close the temperature feedback loop using the soldering iron heater thermistor. The performances of the soldering station can be improved and the circuit can be made ...

To implement a step-up converter with a current output, designers often simply connect the load in place of the top resistor in a resistive-divider feedback network. The bottom resistor then serves as a current-sense resistor. Though simple, this ...

In power converters, pulse-drive circuits transmit the pulses a controller generates to the power transistor. Driver circuits must both transmit the controller's switching on/off signals with galvanic isolation and provide energy to turn the ...

Large analog systems that present many loads to a voltage-reference source can often demand more current than a single reference IC can deliver. However, if the reference IC includes force and sense terminals, you can easily add a buffer to the ...

Most readers are familiar with the current-limiting circuit in Figure 1, in which the load current, I L , is limited to a value of where V BE is the base-to-emitter voltage and R S is the sense resistance. Under normal conditions, in which the ...

Certain current-sense amplifiers have to contend with frequent overvoltages. For example, a current-sense amplifier that monitors battery discharge currents in an automobile must withstand high-voltage load dump pulses produced when loads are ...

In some projects, we need to deliver more power than a single power supply can provide, and in this situation we can use steering Schottky diodes to provide load balancing (Figure 1). In this schematic, we combine the output currents to provide ...

Abstract This application report describes an alternative use of the TLC555-Q1 device as a charge pump. The square-wave output switching between the supply voltage and GND with few additional capacitors and diodes makes the device suitable for ...