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Solutions Search - Solar Energy Harvesting

LT8490 Solar Powered Battery Charger Schematic

Jun 23rd 2014
The LT®8490 is a buck-boost switching regulator battery charger that implements a constant-current constantvoltage (CCCV) charging profile used for most battery types, including sealed lead-acid (SLA), flooded, gel and lithium-ion. The device operates from input voltages above, below or equal to the output voltage and ...

Circuit 

 

LT8490 27.4V Solar Panel Lithium-Ion Polymer Battery Charger

Jun 23rd 2014
The LT®8490 is a buck-boost switching regulator battery charger that implements a constant-current constantvoltage (CCCV) charging profile used for most battery types, including sealed lead-acid (SLA), flooded, gel and lithium-ion. The device operates from input voltages above, below or equal to the output voltage and ...

Circuit 

 

LT3652HV 2A Solar Panel Power Manager With 7.2V LiFePO4 Battery and 17V Peak Power Tracking

Jun 23rd 2014
The LT3652HV is a complete monolithic step-down battery charger that operates over a 4.95V to 34V input range. The LT3652HV provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A. The charger employs a 3.3V float voltage feedback reference, so any desired ...

Circuit 

 

LT3652HV 1A Solar Panel Powered 3-Stage 12V Lead-Acid Fast/Float Charger

Jun 23rd 2014
The LT3652HV is a complete monolithic step-down battery charger that operates over a 4.95V to 34V input range. The LT3652HV provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A. The charger employs a 3.3V float voltage feedback reference, so any desired ...

Circuit 

 

LTC3331 Charging a Battery with Harvested Energy

Jun 9th 2014
The LTC®3331 integrates a high voltage energy harvesting power supply plus a buck-boost DC/DC powered from a rechargeable battery to create a single output supply for alternative energy applications. A 10mA shunt allows simple charging of the battery with harvested energy while a low battery disconnect function protects ...

Circuit 

 

LTC3331 Low Voltage Solar Harvester with Reduced Component Count (VIN < 6V)

Jun 9th 2014
The LTC®3331 integrates a high voltage energy harvesting power supply plus a buck-boost DC/DC powered from a rechargeable battery to create a single output supply for alternative energy applications. A 10mA shunt allows simple charging of the battery with harvested energy while a low battery disconnect function protects ...

Circuit 

 

LTC3107 Dual Input Harvester Utilizes Thermal and Solar Energy

Dec 19th 2013
The LTC®3107 is a highly integrated DC/DC converter designed to extend the life of a primary battery in low power wireless systems by harvesting and managing surplus energy from extremely low input voltage sources such as TEGs (Thermoelectric Generators) and thermopiles. The step-up topology operates from input voltages ...

Circuit 

 

LTC3107 3.6V Solar Powered Battery Life Extender Works from Indoor Lighting

Dec 19th 2013
The LTC®3107 is a highly integrated DC/DC converter designed to extend the life of a primary battery in low power wireless systems by harvesting and managing surplus energy from extremely low input voltage sources such as TEGs (Thermoelectric Generators) and thermopiles. The step-up topology operates from input voltages ...

Circuit 

 

Solar Battery Charger Maintains High Efficiency in Low Light

Jay Celani Oct 31st 2013
An important characteristic of any solar panel is that it achieves peak power output at a relatively constant operating voltage (VMP) regardless of illumination level (see Figure 2). The LT3652 2A battery charger exploits this characteristic to maintain a solar panel at peak operating efficiency by implementing input voltage ...

Blog Post Circuit 

 

Solar & Piezo Energy Harvester and Battery Life Extender

Mar 18th 2013
The LTC3330 integrates a high voltage energy harvesting power supply plus a DC/DC converter powered by a primary cell battery to create a single output supply for alternative energy applications. The energy harvesting power supply, consisting of an integrated full-wave bridge rectifier and a high voltage buck converter, harvests ...

Circuit 

 

LTC3129 Solar Powered Converter Extends Battery Life in Low Power 3V Primary Battery Applications

Feb 4th 2013
The LTC3129 is a high efficiency, 200mA buck-boost DC/DC converter with a wide VIN and VOUT range. It includes an accurate RUN pin threshold to allow predictable regulator turn-on and a maximum power point control (MPPC) capability that ensures maximum power extraction from non-ideal power sources such as photovoltaic panels. ...

Circuit 

 

LTC3129 Solar Powered Converter with MPPC Charges Storage Capacitor

Feb 4th 2013
The LTC3129 is a high efficiency, 200mA buck-boost DC/DC converter with a wide VIN and VOUT range. It includes an accurate RUN pin threshold to allow predictable regulator turn-on and a maximum power point control (MPPC) capability that ensures maximum power extraction from non-ideal power sources such as photovoltaic panels. ...

Circuit 

 

LT3763: 70W, Solar Energy Harvester with Maximum Power Point Regulation

Oct 9th 2012
The LT3763 is a fixed frequency, synchronous, step-down DC/DC controller designed to accurately regulate output currents up to 20A. The average current mode control- ler will maintain inductor current regulation over a wide output voltage range from 0V to 55V. Output current is set by analog voltages on the CTRL pins and an ...

Circuit 

 

Solar Panel Input 6V to 36VIN to 14.4V at 4.5A Buck Boost Converter 4-Cell LiFePO4 Battery Charger

Jul 23rd 2012
The LTC4000-1 is a high voltage, high performance controller that converts many externally compensated DC/DC power supplies into full-featured battery chargers with maximum power point control. In contrast to the LTC4000, the LTC4000-1 has an input voltage regulation loop instead of the input current regulation loop. Features ...

Circuit 

 

LT3796 Solar Panel Driven SLA Battery Charger with Maximum Power Point Tracking

Apr 3rd 2012
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 

 

Solar-Powered 2.2V Supply and 1.8V LDO with Li Battery Backup and Run Threshold Set to Battery Minimum Voltage

Nov 4th 2011
The LTC3104 is a high efficiency, monolithic synchronous step-down converter using a current mode architecture capable of supplying 300mA of output current. The LTC3104 includes an integrated, adjustable 10mA LDO to power noise sensitive functions. Additionally, the LTC3104 includes an accurate RUN comparator, thermal overload ...

Circuit 

 

Solar-Powered 2.2V Supply with Li Battery Backup and Run Threshold Set to Battery Minimum Voltage

Nov 4th 2011
The LTC3103 is a high efficiency, monolithic synchronous step-down converter using a current mode architecture capable of supplying 300mA of output current. Additionally, the LTC3103 includes an accurate RUN comparator, thermal overload protection, a power good output and an integrated soft-start feature to guarantee that the ...

Circuit 

 

Solar Powered LED Driver

Jul 26th 2011
This figure shows an application for an LED driver supplied with a solar cell for an emergency LED torch. When the torch is off, the LTC3536 is in shutdown. The quiescent current of less than 1μA minimizes supercapacitor drain when the ambient light is no longer available.When the LED torch is switched on, the LTC3536 is turned ...

Circuit 

 

3.3V from Multiple Stacked-Cell Photovoltaic with Source Temperature Tracking

Oct 15th 2010
The LTC3105 is a high efficiency step-up DC/DC converter that can operate from input voltages as low as 200mV. A 250mV start-up capability and integrated maximum power point controller (MPPC) enable operation directly from low voltage, high impedance alternative power sources such as photovoltaic cells, TEGs (thermoelectric ...

Circuit 

 

Single-Cell Photovoltaic NiMH Trickle Charger

Oct 15th 2010
The LTC3105 is a high efficiency step-up DC/DC converter that can operate from input voltages as low as 200mV. A 250mV start-up capability and integrated maximum power point controller (MPPC) enable operation directly from low voltage, high impedance alternative power sources such as photovoltaic cells, TEGs (thermoelectric ...

Circuit 

 

Simple Photovoltaic Charger

Oct 5th 2010
The LTC4071 allows simple charging of Li-Ion/Polymer batteries from very low current, intermittent or continuous charging sources. A near-zero current low battery latching disconnect function protects even the lowest capacity batteries from deep discharge and potentially irreparable damage. The 550nA to 50mA operating current ...

Circuit 

 

2-Cell Solar Panel Li-Ion Battery Charger

Oct 5th 2010
This circuit shows a compact solar-powered battery charger using a LTC3105 as a boost converter and a LTC4071 as Li-Ion shunt charger. A 2-cell 400mW solar panel provides the input power to the LTC3105 to produce over 60mA of charge current in full sunlight. Maximum power point control prevents the solar panel voltage from ...

Circuit 

 

Photovoltaic Charger with Extremely Low Leakage When Not Charging

Jan 29th 2010
A photovoltaic (PV) application for the LTC4070 is illustrated in this example. In this application, transistor Q1 has been added to further reduce the already low quiescent current of the LTC4070 to achieve extremely low battery discharge when the PV cells are not charging the battery. In long battery life applications, Q1 ...

Circuit 

 

5V to 16V Solar-Powered 2.5V Supply with Supercapacitor for Increased Output Energy Storage and Battery Backup

Jan 6th 2010
5V to 16V Solar-Powered 2.5V Supply with Supercapacitor for Increased Output Energy Storage and Battery Backup ...

Circuit 

 

Li-Ion Battery Charger and 2.2V LDO Powered by a Solar Cell with Indoor Lighting

Nov 30th 2009
The LTC3108 is a highly integrated DC/DC converter ideal for harvesting and managing surplus energy from extremely low input voltage sources such as TEGs (thermoelectric generators), thermopiles and small solar cells. The step-up topology operates from input voltages as low as 20mV. ...

Circuit 

 

2A Solar Panel Power Manager With 7.2V LiFePO4 Battery and 17V Peak Power Tracking

Aug 18th 2009
The LT3652 is a complete monolithic step-down battery charger that operates over a 4.95V to 32V input voltage range. The LT3652 provides a constant-current/ constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A. The charger employs a 3.3V fl oat voltage feedback reference, so any ...

Circuit 

 

1A Solar Panel Powered 3-Stage 12V Lead-Acid Charger

Aug 18th 2009
1A Solar Panel Powered 3-Stage 12V Lead-Acid Fast/Float Charger; 1A Charger Fast Charges with CC/CV Characteristics Up to 14.4V; When Charge Current Falls to 0.1A Charger Switches to 13.5V Float Charge Mode; Charger Re-Initiates 14.4V Fast Charge Mode if Battery Voltage Falls Below 13.2V and Trickle Charges at 0.15A if Battery ...

Circuit 

 

Solar Panel Charging 12V Battery Through Ideal Diode to Prevent Back Feeding

Jul 30th 2007
In solar power systems, Schottky diodes are used to prevent discharge of the battery during hours of darkness. Unfortunately, the voltage drop and power dissipation of a Schottky diode can be quite large when used with high wattage solar panels, thus reducing the amount of power available to charge the battery. This circuit ...

Circuit 

 

Solar Powered Super Capacitor Charger with MPPT

Oct 26th 2000
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 

 

Peak Power Tracking Buck Solar Charger Maximizes Efficiency

Sep 22nd 1997
Solar panels are gaining acceptance as a practical means of electricity generation in remote locations, but despite improvements in the technology, solar panels remain expensive. Much of the expense is the panel itself, where the size, and thus cost, of the panel rises with required power output. Maximizing panel performance ...

Circuit