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Super Capacitor Circuits

#'s  - L        M - Z

Last Updated: October 24, 2017 02:55 PM

Circuits Designed by Dave Johnson, P.E. :

Supercapacitor Voltage Limiting Circuit -  Supercapacitors are working their way into more and more applications where electrical energy needs to be stored.  These robust devices can be charged and discharged 1000s of times and will typically outlast a battery. . . Circuit by Dave Johnson P.E.-March, 2010

Vertical Lifting Security Gate Power Source -  The circuit that I came up with is shown below.  it uses 5 identical circuits.  Each one is wired in parallel with it assigned 650F super capacitor.  A LM385 provides a 1.2v voltage reference.  A resistor divider measures the voltage across the capacitor and feeds the voltage to a low power, low voltage op amp.  The output of the op amp drives an n-channel FET.  I designed the circuit for a maximum charge current of 600ma.  This would allow the use of a 10 watt solar panel, if needed, in the future.  Each of the five circuits forms a shunt type voltage regulator, limiting the voltage across each capacitor to about 2.6v.. . . Circuit by David A. Johnson P.E.-November, 2009

Voltage Limiting with a Supercapacitor -  Supercapacitors are working their way into more and more applications where electrical energy needs to be stored.  These robust devices can be charged and discharged 1000s of times and will typically outlast a battery . . . Hobby Circuit designed by David Johnson P.E.-March, 2010

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Memory termination IC balances charges on series capacitors -  08/18/05  EDN Design Ideas:  Get the best performance from high-value capacitors with simple IC circuit __ Circuit Design by Clayton B Grantham, National Semiconductor, Tucson, AZ

One-capacitor powers audio mixer -  03/14/97 EDN Design Ideas:  Micro power and low-voltage op amps allow you to build high-performance analog-signal processors that require no batteries or wall transformers, this simple mixer is powered using one large capacitor such as a Supercap or Dynacap for some Time __ Circuit Design by Aleksandr Belousov, Rego Park, NY

Power Backup System using Supercapacitors -  This circuit shows a power holdup system that incorporates a supercapacitor stack with the capacity to provide standby power of 165mW for about 45 seconds in the absence of battery power.  An LDO converts the output of the supercapacitor stack to a constant voltage supply during backup mode.  __ Linear Technology/Analog Devices App Note, Jan 30th 2012

Power Backup using Supercapacitors & Optional Keep-Alive Cell -  The LTC4415 contains two monolithic PowerPath ideal diodes, each capable of supplying up to 4A with typical forward conduction resistance of 50mΩ.  The diode voltage drops are regulated to 15mV during forward conduction at low currents, extending the power supply operating range and ensuring no oscillations during supply switchover.  __ Linear Technology/Analog Devices App Note, Dec 5th 2011

Redundant USB & 3xAA High Peak Power Battery Supplies using Two Supercapacitors -  The LTC4425 is a constant-current/constant-voltage linear charger designed to charge a 2-cell supercap stack from either a Li-ion/Polymer battery, a USB port, or a 2.7V to 5.5V current-limited supply.  The part operates as an ideal diode with an extremely low 50mΩ on-resistance making it suitable for high peak-power/low average__ Linear Technology/Analog Devices App Note, Mar 24th 2010

Single capacitor powers audio mixer -  03/14/97 EDN Design Ideas:  Micro power and low-voltage op amps allow you to build high-performance analog-signal processors that require no batteries or wall transformers, this simple mixer is powered using one large capacitor such as a Supercap or Dynacap for some Time __ Circuit Design by Aleksandr Belousov, Rego Park, NY

Single Supercap Charger from 3.3V Input to 2.5V Output -  The LTC3125 is a high efficiency, synchronous step-up DC/DC converter with an accurate programmable 5% accurate average input current is resistor programmable and suitable for a wide variety of applications__ Linear Technology/Analog Devices App Note, Mar 24th 2010

Solar cells implement low-cost illuminator -  09/12/97 EDN Design Ideas:  he advent of inexpensive solar cells and low-cost "ultracapacitors" makes it possible to develop an entirely solar-powered inspection illuminator.    __ Circuit Design by Dennis Eichenberg, Parma Heights, OH

Solar Powered Super Capacitor Charger with MPPT -  The input of the LTC3625 can also be driven by many widely available solar cells.  in this circuit, MPPT (maximum power point tracking) is implemented by modulating the charge current based on the input voltage of the LTC3625.  The LTC3625/LTC3625-1 are programmable supercapacitor chargers designed to charge two Supercapacitors __ Linear Technology/Analog Devices App Note, Jul 23, 2010

SuperCap Backup Power -  The LT8582 is a dual independent channel PWM DC/DC converter with a power good pin and built-in fault protection to help guard against input overvoltage and overtemperature conditions.  Each channel consists of a 42V master switch and a 42V slave switch that can be tied together for a total current limit of 3A.  __ Linear Technology/Analog Devices App Note, Jan 16th 2012

Supercap Charger Plus a 5V at 4A DC/DC Buck Converter from 5.5V to 30V Input -  The LT3742 is a dual step-down DC/DC switching regulator controller that drives high side N-channel power MOSFETs.  A 500kHz fixed frequency current mode architecture provides fast transient response with simple loop compensation components and cycle-by-cycle current limiting.  The output stages of the two controllers operate 180 out of phase to reduce the input ripple current, minimizing the noise induced on the input supply, and allowing less input capacitance__ Linear Technology/Analog Devices App Note, Mar 24, 2010

Supercap Powered Backup Supply -  The LTC3113 is a wide ViN range, highly efficient, fixed frequency, buck-boost DC/DC converter that operates from input voltages above, below or equal to the output voltage.  The topology incorporated in the IC provides low noise operation, making it well suited for RF and precision measurement applications.  The LTC3113 can deliver up to 3A of continuous output current to satisfy the most demanding applications__ Linear Technology/Analog Devices App Note, Dec 22, 2012

Supercapacitor Based Backup Power Supply -  in this application, two series of supercapacitors are charged to 5V during normal operation to provide the needed backup energy in case the primary power fails.  As long as the primary power is present, the LTC3536 remains in Burst Mode operation with very low quiescent current, minimizing drain on the backup storage capacitor.  The MODE pin is used to change from Burst Mode to PWM mode operation when primary power is interrupted.  __ Linear Technology/Analog Devices App Note, Oct 3, 2012

Supercapacitor boosts current from small battery -  09/02/04  EDN Design Ideas:  Some battery-powered devices require large amounts of current in a short period of time but spend most of the time in sleep (power-down] mode.  The momentary large-load current demands large batteries to meet the time requirement, eve __ Circuit Design by Yongping Xia, Navcom Technology, Torrance, CA

Supercapacitor Energy Storage System for Data Backup -  This circuit shows a supercapacitor-based power backup system using the LTC3625 supercapacitor charger, an automatic power crossover switch using the LTC4412 PowerPath controller and an LTM4616 dual output μModule DC/ DC converter.  __ Linear Technology/Analog Devices App Note, Mar 16th 2011

Supercapacitor Voltage Limiting Circuit -  Supercapacitors are working their way into more and more applications where electrical energy needs to be stored.  These robust devices can be charged and discharged 1000s of times and will typically outlast a battery. . . Circuit by Dave Johnson P.E.-March, 2010

Supercap-Based Power Ride-Through Maximizes Run Time using an Energy Scavenging Scheme -  This circuit shows a complete 3.3 V/200mA ride-through application that maximizes the amount of power extracted from the supercap to support the load.  The main components of the ride-through application includes the LTC4425 complete 2A supercapacitor charger to clamp the individual cell voltages and ensure that the cells do__ Linear Technology/Analog Devices App Note, Mar 16th 2011

Ultracapacitor powers bicycle light -  09/28/00 EDN Design Ideas:  The circuit in Figure 1 represents a simple and inexpensive way to provide additional bicycling safety.  A conventional bicycle-generator lighting system works with the circuit to provide safety lighting for several minutes after the bicycle has stopped.  Energy storage uses an ultracapacitor rather than a battery to avoid the typical battery problems of limited life __ Circuit Design by Dennis Eichenberg, Parma Heights, OH

USB to High Peak Power 3.3V Supply using Two Supercapacitors -  The LTC4425 is a constant-current/constant-voltage linear charger designed to charge a 2-cell supercap stack from either a Li-ion/Polymer battery, a USB port, or a 2.7V to 5.5V current-limited supply.  The part operates as an ideal diode with an extremely low 50mΩ on-resistance making it suitable for high peak-power/low average__ Linear Technology/Analog Devices App Note, Mar 24th 2010

Vertical Lifting Security Gate Power Source -  The circuit that I came up with is shown below.  it uses 5 identical circuits.  Each one is wired in parallel with it assigned 650F super capacitor.  A LM385 provides a 1.2v voltage reference.  A resistor divider measures the voltage across the capacitor and feeds the voltage to a low power, low voltage op amp.  The output of the op amp drives an n-channel FET.  I designed the circuit for a maximum charge current of 600ma.  This would allow the use of a 10 watt solar panel, if needed, in the future.  Each of the five circuits forms a shunt type voltage regulator, limiting the voltage across each capacitor to about 2.6v.. . . Circuit by David A. Johnson P.E.-November, 2009

Voltage Limiting with a Supercapacitor -  Supercapacitors are working their way into more and more applications where electrical energy needs to be stored.  These robust devices can be charged and discharged 1000s of times and will typically outlast a battery . . . Hobby Circuit designed by David Johnson P.E.-March, 2010

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Super Capacitor Circuits:  #'s  - L        M - Z

 


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