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Super Capacitor Circuits

#'s  - L        M - Z

Last Updated: January 01, 2018 04:02 AM

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-368-7747




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

12V Input to 5V Outputs High Peak-Power & Backup Supply using Two Supercapacitors with Input Voltage Monitoring -  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

12V Power Ride through using Six 10F, 2.7V Supercapacitors in Series with Front End Flyback -  Multiple LTC3625's can be stacked in series to store significantly more energy and extend hold up time in ride through or last gasp applications.  in this circuit, the three outputs of the LT1737 flyback converter drive three LTC3625's, each of which charges a pair of 100F capacitors.  in the event of an interruption to the__ Linear Technology/Analog Devices App Note, Jul 23, 2010

12V Power Ride-Through Application using Six Supercapacitors in Series & Voltage Supervisor -  The LTC3225 is a programmable supercapacitor chargers designed to charge two supercapacitors in series to a selectable output voltage (4.8V/5.3V or 4V/4.5V) from 2.8V to 5.5V input with automatic cell balancing.  This example uses six supercapacitors in series charged by three LTC3225s.  Voltage supervision is provided by__ Linear Technology/Analog Devices App Note, Mar 23, 2010

12V to 5V/3.3V High Peak Power 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

1-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

2.65V at 1.2A Output Super Cap Charging from 7.5V to 36V Input -  The LT3759 is a wide input range, current mode, DC/DC controller which is capable of regulating either positive or negative output voltages from a single feedback pin.  it can be configured as a boost, SEPIC  or inverting converter.  The LT3759 drives a low side external N-channel power MOSFET.  An internal LDO regulator draws__ Linear Technology/Analog Devices App Note, .Mar 24th 2010

20A Super Capacitor Charger with 5V Regulated Output from 10V to 36V Input -  The LT3741 is a fixed frequency synchronous step-down DC/DC controller designed to accurately regulate the output current at up to 20A.  The average current-mode controller will maintain inductor current regulation over a wide output voltage range of 0V to (ViN 2V).  The regulated current is set by an analog voltage on the CTRL pins and an external sense resistor.  Due to its unique topology, the LT3741 is capable of sourcing and sinking__ Linear Technology/Analog Devices App Note, Mar 24th 2010

28V Input to 0V to 28V Output SEPIC SuperCap Charger with Input Current Limit -  in this circuit, a supercapacitor is charged from it's fully uncharged state up to a full charge voltage of 28V.  This wide output voltage range is accomplished using a SEPIC  topology.  The built in input current limit of the LT3956 simplifies the design.  The LT3956 is a DC/DC converter designed to operate as a constant-current source and constant-voltage regulator.  it is ideally suited for driving high current LEDs.  it features an internal low side N-channel power MOSFET rated for 84V at 3.3 A and driven from an internal regulated 7.15V supply__ Linear Technology/Analog Devices App Note, Jun 23, 2010

3 x AA Alkaline to High Peak Power 3.3V at 2A 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

3.3V at 1.5A from 5V Peak-Power & Back-up 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

3.3V to 5.5V input (500mA max) charging 4.4mF super cap (3.3V at 800mA) & providing 1.8V at 400mA -  The LTC3619 is a Dual 400mA/800mA monolithic synchronous buck regulator with an input supply voltage range is 2.5V to 5.5V, making it ideal for Li-ion and USB powered applications __ Linear Technology/Analog Devices App Note, Mar 23, 2010

36VIN, 5.6A Two 2.5V Series Supercapacitor Charger -  The LTM8026 is a 36ViN, 5A constant-voltage, constant current (CVCC) step-down μModule regulator.  included in the package are the switching controller, power switches, inductor and support components.  Operating over an input voltage range of 6V to 36V, the LTM8026 supports an output voltage range of 1.2V to 24V.  CVCC operation allows the LTM8026 to accurately regulate its output current up to 5A over the entire output range.  The output current can be set by a control voltage, a single resistor or a thermistor.  Only resistors to set the output voltage and frequency and the bulk input and output filter capacitors are needed to finish the design__ Linear Technology/Analog Devices App Note, Feb 17th 2012

5V Backup Supply from Supercap Runs Down to VIN = 2V with 250mA Load -  The LTC3112 is a fixed frequency synchronous buck-boost DC/DC converter with an extended input and output range.  The unique 4-switch, single inductor architecture provides low noise and seamless operation from input voltages above, below or equal to the output voltage.  With an input range of 2.7V to 15V, the LTC3112 is well suited for a wide variety of single or multiple cell battery, backup capacitor or wall adapter source applications.  Low RDS (ON) internal N-Channel MOSFET switches provide highly efficient operation in applications with higher load current requirements.  __ Linear Technology/Analog Devices App Note,.Dec 22, 2010

5V Power Ride-Through Application using Two Series Connected 10F, 2.7V Supercapacitors Charged to 4.8V that Can Hold Up 20W for 1.42 seconds -  The LTC3225 is a programmable supercapacitor chargers designed to charge two supercapacitors in series to a selectable output voltage (4.8V/5.3V or 4V/4.5V) from 2.8V to 5.5V input with automatic cell balancing.  __ Linear Technology/Analog Devices App Note, Mar 23, 2010

5V to 16V Solar-Powered 2.5V Supply with Supercapacitor for Increased Output Energy Storage & Battery Backup -  5V to 16V Solar-Powered 2.5V Supply with Supercapacitor for increased Output Energy Storage and Battery Backup__ Linear Technology/Analog Devices App Note, Mar 23, 2010

Ceramic Input Capacitors can Cause OverVoltage Transients -  AN88 When it comes to input filtering, ceramic capacitors are a great choice.  They offer high ripple current rating and low ESR and ESL.  Also, ceramic capacitors are not very sensitive to over voltage and can be used without deratingoperating voltage.  However, designers must be aware of a potential overvoltage condition that is generated__ Linear Technology/Analog Devices

Ceramic output capacitors enhance internally compensated switchers -  07/20/06  EDN Design Ideas:  Restore switching regulator stability when you change output-capacitor compositions __ Circuit Design by Robert Kollman, Texas Instruments, Dallas, TX

Charge Supercapacitors to 7V from USB Power -  04/26/07 EDN Design Ideas:  Switching regulator charges three supercapacitors with current limit.    __ Circuit Design by Fran Hoffart, Linear Technology, Milpitas, CA

Complete Energy Utilization Maximizes Run Time of Supercap Ride-Through Application -  This figure 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 include the LTC4425 complete 2A supercapacitor charger (it clamps the individual cell voltages to ensure that the cells do not__ Linear Technology/Analog Devices App Note, Oct 26th 2010

Dual Super Cap Charging from 12V with Balance Voltage Charging Control  -  The LT3663 is a 1.2A Step-Down Switching Regulator with Output Current Limit that is ideal for use as a supercapacitor charger since it provides adjustable output voltage and adjustable charging current limit.  __ Linear Technology/Analog Devices App Note, Mar 24, 2010

Dual Supercapacitor Backup Power Supply, 0.5V to 5V -  The LTC3122 is a synchronous step-up DC/DC converter with true output disconnect and inrush current limiting.  The 2.5A current limit along with the ability to program output voltages up to 15V makes the LTC3122 well suited for a variety of demanding applications.  Once started, operation will continue with inputs down to 500mV, __ Linear Technology/Analog Devices App Note, Jun 19th 2013

Embedded Automotive (6V to 36V Input) to 5V/3.3V/1.8V/1.2V Output Peak-Power Controller 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

Get power from a telephone line without disturbing it -  12/01/06 EDN Design Ideas:  Supercapacitor stores a trickle charge and delivers regulated output voltage __ Circuit Design by Yongping Xia, Navcom Technology, Torrance, CA

High Current USB Battery & Supercapacitors Charger with Power Path Control  -  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

Li-Ion Backup Supply -  The LTC3226 is a 2-cell series supercapacitor charger with a backup PowerPath controller.  it includes a charge pump supercapacitor charger with programmable output voltage, a low dropout regulator, and a power-fail comparator for switching between normal and backup modes.  The constant input current supercapacitor charger is__ Linear Technology/Analog Devices App Note, Jul 8th 2011

Li-Ion High Peak Power Battery Buffer 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

LTC4425 2A Linear Supercapacitor Charger with Current-Limited Ideal Diode-Video Product Brief -  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, Steve Knoth-Senior Product Marketing Engineer Jul 19th 2010

Got Designs?
Please eMail
if you want me to link to and/or post your original design Thanks.


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


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Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches


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