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Current Limiting Circuits
#'s-C     D-Z
Last Updated on: Thursday, October 30, 2014 09:22 AM

 

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13.8 Volt 20A PSU -  This is a Regulated DC power supply with short circuit protection and with current limiter. (added 6/03)
13.8V 20A Power Supply -  As is commonly the case, this supply was born of necessity. There is absolutely nothing special about the circuit, except that as shown, it is quite capable of up to 20 Amps intermittently or 10A continuous. Simply use a bigger transformer, bridge rectifier and more capacitors and output transistors to get more current. The basic circuit should be good for up to 100A or so, using a 5A TO3 regulator IC, but it can obviously be increased further (if you really do need a 500A supply!). ….(design added 11/08)
13.8V 20A PSU -  This is a Regulated DC power supply with short circuit protection and with current limiter.  (electronic design added 6/07)
9 Volt 2 Amp Power Supply -  A simple 9 Volt 2 amp supply using a single IC regulator. (added 6/03)
A Current Limiting Bench 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..... [Circuit Designed by Ron J.]
Add trimmable current limit to dc/dc supply -  1-Aug-97 Issue of EDN  You can add a simple, two-transistor circuit to a standard, step-down dc/dc converter to provide an adjustable limit for the output current. You can apply this method to most step-down converters that provide access to the feedback node..... [Design Idea by Terry Millward, Maxim Integrated Products UK Ltd, Theale, UK]
An Add-On Current Limiter For Your PSU -  This circuit allows you to set a limit on the maximum output current available from your PSU. It's very useful when…. [Ron J.'s circuit]
AN-8 Hiccup Mode Current Limiting -  Application Note Microsemi 1303 (added 2/07)
Apex-AN09 Foldover Current Limiting -  2/1998, AN9UREVB : 217 Kb (Apex App Note added 08/08/08)
Circuit Adds Latch-Off Current Limit to Regulator -  03/30/00 EDN-Design Ideas.....In many applications, forcing a high-current power supply to latch off if a sustained fault condition exists can minimize the likelihood of damage to the pc-board traces and the power devices in the supply. Pulse-width-modulation (PWM]-control circuits provide no latch-off feature, but the circuit in Figure 1 does.....PFD contains several circuits, croll to find this one..... [Design Idea by Craig Varga, Linear Technology Corp, Milpitas, CA]
Circuit provides hiccup-current limiting -  26-Jun-03 Issue of EDN  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..... [Design Idea by CH How and KP Basu, Multimedia University, Cyberjaya, Malaysia]
Comparator Adds Current Limit to V2 Controller -  05/21/98 EDN-Design Ideas.....Many step-down controllers satisfy the need for generating low voltages for µPs and logic. The lower the output voltage, the greater the importance of building a system with fast transient response. Some new controllers use the V2 control architecture, which provides several speed improvements over….contains multiple circuits scroll to find this circuit..... [Design Idea by Dimitry Goder, Switch Power Inc, Campbell, CA]
Current limit switch is Digitally programmable -  08/17/00 EDN-Design Ideas.....Current-limit switches are virtually ubiquitous in system controls. They provide a safe means for regulating the current delivered to a load circuit. The switches allow the load current to increase to a programmed limit but no higher. Typically, the current limit is a function of the voltage across an external resistor, produced by the current from  EDN is migrating links. This link is not verified.  Google the "title" EDN for new link.
Current limiter allows large USB bypass capacitance -  6-Aug-09 Issue of EDN  A current-sense amplifier limits inrush current..... [Design Idea by Daniel Morris, Group IV Technology, Renton, WA]
Current Limiter Provides Latch up Signal -  01/01/98 EDN-Design Ideas.....Current-limiting circuit both signals a latch-up condition and prevents latch-up-induced overcurrent destruction of a CMOS IC or group of ICs..... EDN is migrating links. This link is not verified.  Search the "title" + "EDN" for new link.
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) [Design by Ron J.]
Current Limiting Resistor Calculator information -  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]
Current-limit Switch is Digitally Programmable -  08/17/00  EDN-Design Idea  Current-limit switches are virtually ubiquitous in system controls. They provide a safe means for regulating the current delivered to a load circuit. The switches allow the load current to increase to a programmed limit but no higher. Typically, the current limit is a function of the voltage across an external resistor, produced by the current from a fixed source internal to the switch IC.  This..... [Design Idea by Budge Ing, Maxim Integrated Products, Sunnyvale, CA]
Current-Limit Switch Is Digitally Programmable -  Current-limit switches are virtually ubiquitous in system controls. They provide a safe means for regulating the current delivered to a load circuit. The switches allow the load current to increase to a programmed limit but no higher.  This application note illustrates the implementation of a digitally programmable current-limit switch using MAX890L a current-limited, high-side P-channel switch and MAX5160 digital potentiometer.....[Maxim Application Note 298].....
Current-Limited DC/DC Converter Simplifies USB Power Supplies -  DN252  Design Notes (Linear Technology) (app note added 2/06)

 
Current Limiting Circuits:  #'s-C     D-Z
 


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