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Solutions Search - Supercapacitor Charging

LT3796 28VIN to 28V SuperCap Charger with Input Current Limit and Charge Done Flag

Mar 14th 2014
The LT®3796/LT3796-1 are DC/DC controllers designed to regulate a constant-current or constant-voltage and are ideal for driving LEDs. The fixed frequency and current mode architecture result in stable operation over a wide range of supply and output voltages. Two ground referred voltage FB pins serve as the input for ...

Circuit 

 

LTC3355 Tantalum Capacitor Charger and Ride-Through Backup Supply

Mar 12th 2014
The LTC®3355 is a complete input power interrupt ridethrough DC/DC system. The part charges a supercapacitor while delivering load current to VOUT, and uses energy from the supercapacitor to provide continuous VOUT backup power when VIN power is lost. The LTC3355 contains a nonsynchronous constant frequency current mode ...

Circuit 

 

LTC3355 NiMH Trickle Charger and Ride-Through Backup Supply

Mar 12th 2014
The LTC®3355 is a complete input power interrupt ridethrough DC/DC system. The part charges a supercapacitor while delivering load current to VOUT, and uses energy from the supercapacitor to provide continuous VOUT backup power when VIN power is lost. The LTC3355 contains a nonsynchronous constant frequency current mode ...

Circuit 

 

LTC3637 4V to 76V Input to 1.8V SuperCap Charger

Mar 5th 2014
The LTC®3637 is a high efficiency step-down DC/DC regulator with an internal high side power switch that draws only 12μA DC supply current while maintaining a regulated output voltage at no load. ...

Circuit 

 

LTC3128 Single Output Capacitor Application (1.5A Programmed Input Current)

Feb 14th 2014
The LTC®3128 is a highly efficient, buck-boost DC/DC supercapacitor charger. It operates efficiently from input voltages above, below or equal to the output voltage. The LTC3128 incorporates accurate programmable average input current limit, active charge balancing and programmable maximum capacitor voltage. This combination ...

Circuit 

 

LTC3128 Supercapacitor Backup with Secondary Converters (3A Programmed Input Current)

Feb 14th 2014
The LTC®3128 is a highly efficient, buck-boost DC/DC supercapacitor charger. It operates efficiently from input voltages above, below or equal to the output voltage. The LTC3128 incorporates accurate programmable average input current limit, active charge balancing and programmable maximum capacitor voltage. This combination ...

Circuit 

 

LTC3128 5.0V to 3.3V Converter with Power Ride-Through

Feb 14th 2014
The LTC®3128 is a highly efficient, buck-boost DC/DC supercapacitor charger. It operates efficiently from input voltages above, below or equal to the output voltage. The LTC3128 incorporates accurate programmable average input current limit, active charge balancing and programmable maximum capacitor voltage. This combination ...

Circuit 

 

LTC3128 USB 3.0 (900mA Programmed Input Current) Powered, 4.8V Backup Supply

Feb 14th 2014
The LTC®3128 is a highly efficient, buck-boost DC/DC supercapacitor charger. It operates efficiently from input voltages above, below or equal to the output voltage. The LTC3128 incorporates accurate programmable average input current limit, active charge balancing and programmable maximum capacitor voltage. This combination ...

Circuit 

 

LTC3128 Wide VIN (3A Programmed Input Current) to 4.2V

Feb 14th 2014
The LTC®3128 is a highly efficient, buck-boost DC/DC supercapacitor charger. It operates efficiently from input voltages above, below or equal to the output voltage. The LTC3128 incorporates accurate programmable average input current limit, active charge balancing and programmable maximum capacitor voltage. This combination ...

Circuit 

 

LT8710 300kHz, SuperCap Backup Power

Jan 15th 2014
The LT8710 is a synchronous PWM DC/DC controller with a rail-to-rail output current monitor and control. The LT8710 is ideal for many types of power supply topologies and can be easily configured for boost, SEPIC, inverting, or flyback configurations. The LT8710’s rail-to-rail output current monitor and control allows ...

Circuit 

 

LTC3111 3.3V Backup from a High Voltage Capacitor Bank Runs Down to VIN = 2V with 500mA Load

Dec 17th 2013
The LTC3111 is a fixed frequency, synchronous buckboost 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 and output range of 2.5V to 15V, the LTC3111 ...

Circuit 

 

Dual Supercapacitor Backup Power Supply, 0.5V to 5V

Jun 19th 2013
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, ...

Circuit 

 

LT8705 Bi-Directional Buck-Boost Supercapacitor Backup Supply

Feb 15th 2013
The LT8705 is a high performance buck-boost switching regulator controller that operates from input voltages above, below or equal to the output voltage. The part has integrated input current, input voltage, output current and output voltage feedback loops. With a wide 2.8V to 80V input and 1.3V to 80V output range, the LT8705 ...

Circuit 

 

Supercapacitor Based Backup Power Supply

Oct 3rd 2012
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. ...

Circuit 

 

36VIN, 5.6A Two 2.5V Series Supercapacitor Charger

Feb 17th 2012
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 ...

Circuit 

 

Power Backup System Using Supercapacitors

Jan 30th 2012
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. ...

Circuit 

 

SuperCap Backup Power

Jan 16th 2012
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. ...

Circuit 

 

Power Backup Using Supercapacitors and Optional Keep-Alive Cell

Dec 5th 2011
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. ...

Circuit 

 

Supercap-Based Power Ride-Through Circuit Maximizes Run Time Using an Energy Scavenging Scheme

Mar 16th 2011
This circuit shows a complete 3.3V/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 ...

Circuit 

 

Supercapacitor Energy Storage System for Data Backup

Mar 16th 2011
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. ...

Circuit 

 

28V Input to 0V to 28V Output SEPIC SuperCap Charger with Input Current Limit

Jul 23rd 2010
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 ...

Circuit 

 

12V Power Ride Through Using Six 10F, 2.7V Supercapacitors in Series with Front End Flyback

Jul 23rd 2010
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 ...

Circuit 

 

Solar Powered Super Capacitor Charger with MPPT

Jul 23rd 2010
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 ...

Circuit 

 

5V at 6mA for 9.6s Supercapacitor Backup Supply

Mar 24th 2010
The LT1316 is a micropower step-up DC/DC converter that operates from an input voltage as low as 1.5V. A programmable input current limiting function allows precise control of peak switch current. Peak switch current can be set to any value between 30mA and 500mA by adjusting one resistor. ...

Circuit 

 

Last-Gasp 5V Output from 12V to 15V Supply Using a Supercapacitor

Mar 24th 2010
The LT3009 is a micropower low dropout voltage (LDO) linear regulators that supplies 20mA output current with a dropout voltage of 300mV. ...

Circuit 

 

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

Mar 24th 2010
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 ...

Circuit 

 

Redundant USB & 3xAA High Peak Power Battery Supplies using Two Supercapacitors

Mar 24th 2010
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 ...

Circuit 

 

12V to 5V/3.3V High Peak Power Supply using Two Supercapacitors

Mar 24th 2010
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 ...

Circuit 

 

3.3V at 1.5A from 5V Peak-Power & Back-up Supply using Two Supercapacitors

Mar 24th 2010
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 ...

Circuit 

 

High Current USB Battery and Supercapacitors Charger with Power Path Control

Mar 24th 2010
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 ...

Circuit 

 

Li-Ion High Peak Power Battery Buffer Using Two Supercapacitors

Mar 24th 2010
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 ...

Circuit 

 

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

Mar 24th 2010
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 ...

Circuit 

 

USB to High Peak Power 3.3V Supply Using Two Supercapacitors

Mar 24th 2010
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 ...

Circuit 

 

LT3741 20A Super Capacitor Charger with 5V Regulated Output from 10V to 36V Input

Mar 24th 2010
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 ...

Circuit 

 

Single Supercapacitor Charger from 1.8V to 5.5V Input to 5V Output (1000mA Max Input Current)

Mar 24th 2010
The LTC3127 is a wide VIN range, highly efficient, 1.35MHz fixed frequency buck-boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The LTC3127 features programmable average input current limit, making it ideal for power-limited input sources. The input current limit is programmed ...

Circuit 

 

Stacked Supercapacitor Charger from 1.8V to 5.5V Input to 5V Output (1000mA Max Input Current)

Mar 24th 2010
The LTC3127 is a wide VIN range, highly efficient, 1.35MHz fixed frequency buck-boost DC/DC converter that operates from input voltages above, below or equal to the output voltage. The LTC3127 features programmable average input current limit, making it ideal for power-limited input sources. The input current limit is programmed ...

Circuit 

 

Dual Super Cap Charging Circuit from 12V with Balance Voltage Charging Control Circuit

Mar 24th 2010
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. ...

Circuit 

 

2.65V at 1.2A Output Super Cap Charging Circuit from 7.5V to 36V Input

Mar 24th 2010
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. ...

Circuit 

 

Supercap Charger Plus a 5V at 4A DC/DC Buck Converter from 5.5V to 30V Input

Mar 24th 2010
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 ...

Circuit 

 

Stacked Supercap Charger from 2.5V to 5V Input to 4.5V Output

Mar 24th 2010
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 ...

Circuit 

 

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