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Current Limiting Circuits, Page 2
#'s-K     L-Z
Last Updated on: Wednesday, June 02, 2021 05:07 AM


 
Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:

L200 PSU Regulator Circuit -  easy to power supply with1-single L200 IC, offers a variable current limit of up to2 A, as well as voltage regulation. . .  [Andy Collison's website]

 

LED-Current Limiter Accepts AC or Dc -  07/14/11  EDN Design Idea   Prevent excessive current from overdriving your LEDs. LED drivers have lots of features and require plenty of external components. When your application requires no PWM (pulse-width-modulated) dimming or controlled frequency operation, your primary concern may be that too much current could damage or destroy your LEDs. In this case, you can make a simple LED-current limiter from a common low-dropout linear regulator. The circuit in Figure 1 is an LED light bulb for a landscape-lighting system. Landscape lighting typically operates from 12V ac, and peak voltage is approximately 17V. Because the regulator is in series with the LED string, the LED-string current equals the regulator’s output current. . . .  [by Roger Griswold]

LED-Current Limiting Resistor Calculator -  The calculators on this page can be used to find current limiting resistors and currents for Light Emitting Diodes. The first calculator determines the resistance for a desired LED current while the second calculates the current for a given resistance. . . .  [from Rob Paisley's Model Train web site]

Light Emitting Diode-Current Limiting Resistor Calculator -  The calculators on this page can be used to find current limiting resistors and currents for Light Emitting Diodes. The first calculator determines the resistance for a desired LED current while the second calculates the current for a given resistance. . . .  [from Rob Paisley's Model Train web site]

 

Network linearizes DC/DC converter's current-limit characteristics -  10/13/05  EDN Design Idea   Thermistor adds to efficiency, eliminates sense resistor. . .  [by John Guy and Lance Yang, Maxim Integrated Products Inc, Sunnyvale, CA]

 

Pira CZ Stereo Encoder for FM Broadcasting -  This stereo encoder is a halfway between analogue and digital processing. It combines the best from both domains to provide high-quality and easy to build device. The sampling frequency used in this stereo encoder is 97 times. . . 

 

Provide Hiccup-Current Limiting -  06/26/03  EDN Design Idea   Current-limit protection is an essential feature for power-supply systems. The three major types of current-limit-protection mechanisms are constant, foldback, and hiccup. Hiccup current limit performs the best of the three types; . . .  [by CH How and KP Basu, Multimedia University, Cyberjaya, Malaysia]

 

Provides Hiccup-Current Limiting -  06/26/03  EDN Design Idea   Current-limit protection is an essential feature for power-supply systems. The three major types of current-limit-protection mechanisms are constant, foldback, and hiccup. Hiccup current limit performs the best of the three types; . . .  [by CH How and KP Basu, Multimedia University, Cyberjaya, Malaysia]

 

Rechargeable Flashlight Obsoletes Lantern Battery -  11-Dec-03 EDN Design Idea   This Design Idea   describes a high-intensity, rechargeable flashlight system that you can build from a 6V lantern-type flashlight. The rechargeable battery comprises four 2V, 2. 5-Ahr (ampere-hour] SLA (sealed lead-acid] cells, similar . . .  [by Fran Huffart, Linear Technology App Note, Milpitas, CA]

 

Simple & effective inrush current limiter stops surges -  08/02/07 EDN Design Idea   Active circuit and relay replace lossy negative-temperature-coefficient thermistor. Offline power supplies that drive loads of 200W and more require inrush-current limiters. Unrestricted inrush currents can reach hundreds of amperes, which may damage the line rectifier, open the fuse and input-filter inductors, and damage the PFC (power-factor-correction) filter capacitors. A simple method of limiting the inrush current uses an NTC (negative-thermal-coefficient) thermistor that connects in series with the supply line. . . .  [by Gregory Mirsky]

 

Simple and effective inrush-current limiter stops surges -  08/02/07  EDN Design Idea   Active circuit and relay replace lossy negative-temperature-coefficient thermistor. . .  [by Gregory Mirsky, Juno Lighting Group, ModuLight Division, Des Plaines, IL]

 

Soft limiter for oscillator circuits uses emitter-degenerated differential pair -  10/12/06 EDN Design Idea   Phase-shift network plus a few active components yields low-distortion output - Most oscillator circuits include a nonlinear amplitude control that sustains oscillations at a desired amplitude with minimum output distortion. One . . .  [by Douglas Sudjian, Resonext Communications Inc, San Jose, CA]

 

Stereo Limiter -  Stereo Broadcast Limiter Circuit for Ramsey. . . . 

 

Voltage Reference sets Current Limit -  11/19/98 EDN Design Idea  (File has serval designs)  ower op amps have a real need for active output-current limiting. Most power-amplifier designs rely on the voltage drop across a user-supplied sense resistor to turn on an internal transistor. This method has several drawbacks, notably, an inability to change the current-limit point under program control. The current-limit circuit in Figure 1 allows you to establish the setpoint by applying a voltage to one of the amplifier's pins. With this design, it is possible to set the current-limit point with the output of a DAC, possibly under the control of an embedded µC. . . .  [by Joe Engle, Burr-Brown Corp, Tucson, AZ]


Current Limiting Circuits:  #'s-K     L-Z


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