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Current Limiting Circuits
Last Updated on: Friday, August 29, 2008 02:33 PM

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

(AN-8) Hiccup Mode Current Limiting:  Application Note Microsemi 1303 (added 2/07)

13.8 Volt 20psu:  This is a Regulated DC power supply with short circuit protection and with current limiter. (added 6/03)

9 Volt 2psu:  A simple 9 Volt 2 amp supply using a single IC regulator. (added 6/03)

Add Trimmable Current Limit to DC-to-DC Supply:  08/01/97 EDN Design Ideas  / (added 6/06)  You can add a simple, two-transistor circuit to a standard, step-down dc/dc converter to provide an adjustable limit for  output current. You can apply this method to most step-down converters that provide access to  feedback node.

Add-On Current Limiter by Ron J:  This circuit allows you to set a limit on  maximum output current available from your PSU. It's very useful when you power-up a project for  first time or carry out a soak-test. By setting an upper limit on  current available from your PSU you can protect both your power supply and any device connected to it. (added 10/05)

Add-on Current Limiter:  With buzzer (circuit added 11/06)

App Note 9 - Foldover Current Limiting:  Apex Microtechnology Corp App Note (added 6/06)

Application Note 32:  Micrel Application Note Dual Current-Limiting Switch for USB Applications (app note added 6/06)

Circuit Adds Latch Off Current Limit to Regulator:  03/30/00 EDN-Design Ideas / (added 6/06)

Circuit Provides Hiccup Current Limiting:  06/26/03 EDN Design Ideas  /  (added 1/05)  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; however, the implementation is rather complex. In this scheme, upon detection of an overcurrent event, the whole power supply shuts down for an interval before it tri......

Comparator Adds Current Limit to V2 Controller:  05/21/98 EDN-Design Ideas / (added 6/06)  The subroutine "FASTBCD" (Listing 1) for 8051 µPs quickly converts 16-bit binary to 24-bit BCD data. The conversion algorithm involves left-shifting bits from the high-order bit of the binary number into the carry bit while left-shifting the carry bits into the low-order bit of a BCD shift register using BCD left-shift operations. ....

Current Limit Switch is Digitally Programmable:  Maxim Application Notes / 298 / Dec-04  (app note added 6/06)

Current Limiter Provides Latch up Signal:  01/01/98 EDN-Design Ideas / (added 6/06)   -Current-limiting circuit both signals a latch-up condition and prevents latch-up-induced overcurrent destruction of a CMOS IC or group of ICs

Current Limiting Power Supply:  This is a 1-amp variable-voltage PSU. It adjusts from about 3v to 24v: and has the added feature that you can limit the maximum output current. This is invaluable when (for example) you power-up a project for the first time or soak-test a piece of equipment. added 10/05)

Current-Limit Switch is Digitally Programmable:  08/17/00 EDN-Design Ideas  / (added 2/06)    

Current-Limited DC/DC Converter Simplifies USB Power Supplies:  DN252  Design Notes (Linear Technology) (app note added 2/06)

Foldover Current Limiting - App Note 9:  Apex Microtechnology Corp App Note (added 6/06)

Hiccup Mode Current Limiting (AN-8):  Application Note 8 from Microsem  (app note added 6/06)

L200 Psu:  easy to power supply with1-single L200 IC, offers a variable current limit of up to2 A, as well as voltage regulation  (added 10/05)

Network Linearizes DC/DC Converter's Current Limit Characteristics:  10/13/05   EDN -Design Ideas  / (added 6/06)   Thermistor adds to efficiency, eliminates sense resistor.

Rechargeable Flashlight Obsoletes Lantern Battery:  12/11/03 EDN Design Ideas  /  (added 1/05)  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 in size to a standard D-sized battery. SLA cells are especially well-suited to powering flashlights because of their low self-discharge rate....

Soft limiter for oscillator circuits uses emitter-degenerated differential pair:  10/12/2006    EDN Design Ideas  / (added 02/07)    Phase-shift network plus a few active components yields low-distortion output.

Voltage Reference sets Current limit :  11/19/98 EDN-Design Ideas  / (added 6/06)



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