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Solutions Search - Switching Battery Chargers

LTC4013 18V-60V 6.25A LiFeP0415V SLA Replacement Battery Charger

Aug 29th 2016
The LTC4013 is a high voltage battery charger controller that supports float, absorption and equalization lead-acid and constant-current/constant-voltage Li-Ion charging algorithms. It is particularly well suited for charging a wide range of lead-acid batteries, including both vented and sealed type. The LTC4013 also supports ...

Circuit 

 

LTC4013 24V 5A 6 Cell Lead Acid Charger with Absorption and Equalization Charging

Aug 29th 2016
The LTC4013 is a high voltage battery charger controller that supports float, absorption and equalization lead-acid and constant-current/constant-voltage Li-Ion charging algorithms. It is particularly well suited for charging a wide range of lead-acid batteries, including both vented and sealed type. The LTC4013 also supports ...

Circuit 

 

LT3761 94% Efficient Boost LED Driver for Automotive Headlamp with 25:1 PWM Dimming

Sep 3rd 2015
The LT®3761 is a DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal. The LT3761 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed ...

Circuit 

 

LT3761 40W SEPIC LED Driver

Sep 3rd 2015
The LT®3761 is a DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal. The LT3761 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed ...

Circuit 

 

LT3761 10W Grounded Anode Inverting LED Driver

Sep 3rd 2015
The LT®3761 is a DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal. The LT3761 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed ...

Circuit 

 

LT3761 Boost LED Driver for 30kHz PWM Dimming

Sep 3rd 2015
The LT®3761 is a DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal. The LT3761 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed ...

Circuit 

 

LT3761 Buck Mode 5A LED Driver for 40kHz PWM Dimming

Sep 3rd 2015
The LT®3761 is a DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal. The LT3761 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed ...

Circuit 

 

LT3761 80W High Voltage Boost LED Driver with 25:1 Internally Generated PWM Dimming

Sep 3rd 2015
The LT®3761 is a DC/DC controller designed to operate as a constant-current source and constant-voltage regulator. It features a programmable internal PWM dimming signal. The LT3761 is ideally suited for driving high current LEDs, but also has features to make it suitable for charging batteries and supercapacitors. The fixed ...

Circuit 

 

LT3796 Boost LED Driver for Twin LEDs with Detection and Protection for Faulty LED

Sep 1st 2015
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 several ...

Circuit 

 

LTC4015 2-Cell Li-Ion Battery Charger, 8A Charge Current

Aug 18th 2015
The LTC®4015 is a complete synchronous buck controller/ charger with pin selectable, chemistry specific charging and termination algorithms. ...

Circuit 

 

LTC4015 Solar Lead-Acid Battery Charger, 10.7A Charge Current

Aug 18th 2015
The LTC®4015 is a complete synchronous buck controller/ charger with pin selectable, chemistry specific charging and termination algorithms. ...

Circuit 

 

LTC4040 4.5V Backup Application with 4.22V PFI Threshold (Charge Current Setting: 1A, Input Current Limit Setting: 2A)

Jul 15th 2015
The LTC®4040 is a complete 3.5V to 5.5V supply rail battery backup system. It contains a high current step-up DC/DC regulator to back up the supply from a single-cell Li-Ion or LiFePO4 battery. When external power is available, the step-up regulator operates in reverse as a step-down battery charger. ...

Circuit 

 

LTC4040 5V Backup System with 12V Buck ior Automotive Application(Charge Current Setting: 1A, Input Current Limit Setting: 2A)

Jul 15th 2015
The LTC®4040 is a complete 3.5V to 5.5V supply rail battery backup system. It contains a high current step-up DC/DC regulator to back up the supply from a single-cell Li-Ion or LiFePO4 battery. When external power is available, the step-up regulator operates in reverse as a step-down battery charger. ...

Circuit 

 

LTC4040 5V Backup Application with OVP Protection and Non-Backed Up Load Option (Charge Current Setting: 2.5A, Input Current Limit Setting: 4A)

Jul 15th 2015
The LTC®4040 is a complete 3.5V to 5.5V supply rail battery backup system. It contains a high current step-up DC/DC regulator to back up the supply from a single-cell Li-Ion or LiFePO4 battery. When external power is available, the step-up regulator operates in reverse as a step-down battery charger. ...

Circuit 

 

LTC3890 & LTC4000 60V Input DC/DC Power Supply with Battery Backup

Victor Khasiev - Applications Engineer
Gabino Alonso - Strategic Marketing Engineer
Feb 27th 2015
Introduction Circuitry presented in this article can be very useful for designing compact power supplies and extremely beneficial for system functioning in conditions of input power interruptions. The presented solution can be embedded into uninterruptible power systems or small standalone modules. It can be successfully employed ...

Blog Post Circuit LTspice 

 

LT8490 14.2V Flooded Lead-Acid Battery Charger

Feb 10th 2015
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 can ...

Circuit 

 

LT8490 56.8V Lead-Acid Battery Charger (Four 12V Batteries in Series)

Feb 10th 2015
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 can ...

Circuit 

 

LTC4002 1.5A Single Cell Li-Ion Battery Charger

Jan 28th 2015
The LTC4002 is a complete battery charger controller for one (4.2V) or two (8.4V) cell lithium-ion batteries. With a 500kHz switching frequency, the LTC4002 provides a small, simple and efficient solution to fast charge Li-Ion batteries from a wide range of supply voltages. An external sense resistor sets the charge current ...

Circuit 

 

LTC4002 2-Cell 8.4V, 2A Li-Ion Battery Charger

Jan 28th 2015
The LTC4002 is a complete battery charger controller for one (4.2V) or two (8.4V) cell lithium-ion batteries. With a 500kHz switching frequency, the LTC4002 provides a small, simple and efficient solution to fast charge Li-Ion batteries from a wide range of supply voltages. An external sense resistor sets the charge current ...

Circuit 

 

LTC4006 4A Li-Ion Battery Charger

Jan 28th 2015
The LTC4006 is a complete constant-current/constant voltage charger controller for 2-, 3- or 4-cell lithium batteries in a small package using few external components. The PWM controller is a synchronous, quasi-constant frequency, constant off-time architecture that will not generate audible noise even when using ceramic capacitors. ...

Circuit 

 

LTC4100 4-Cell Li-Ion Smart Battery Charger @ 4A

Jan 20th 2015
The LTC®4100 Smart Battery Charger is a single chip charging solution that dramatically simplifies construction of an SBS compliant system. The LTC4100 implements a Level 2 charger function whereby the charger can be programmed by the battery or by the host. A SafetySignal on the battery being charged is monitored for temperature, ...

Circuit 

 

LTC4012-3 13-20Vin, 3-Cell Li-Ion (12.3V) 3A Battery Charger

Jan 20th 2015
The LTC4012-3 is a constant-current/constant-voltage battery charger controller. It uses a synchronous quasiconstant frequency PWM control architecture that will not generate audible noise with ceramic bulk capacitors. Charge current is set by external resistors and can be monitored as an output voltage across the programming ...

Circuit 

 

LT3650-4.2 10V to 32V 1.5A Charger with C/10 Termination and 1A Input Supply Limit. Status Pins Use LED Indicators

Jan 19th 2015
The LT3650 is a complete monolithic single-cell Li-Ion/ Polymer battery charger that operates over a 4.75V to 32V input voltage range (7.5V minimum start-up voltage). The LT3650 provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A, set using an external ...

Circuit 

 

LT3650-4.1 7.5V to 32V Single-Cell Li-Ion 2A Charger

Jan 19th 2015
The LT3650 is a complete monolithic single-cell Li-Ion/ Polymer battery charger that operates over a 4.75V to 32V input voltage range (7.5V minimum start-up voltage). The LT3650 provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A, set using an external ...

Circuit 

 

LT3650-8.4 12V to 32V 1.5A PowerPath Charger with C/10 Termination and 1A Input Supply Limit. Status Pins Use LED Indicators

Jan 19th 2015
The LT3650 is a complete monolithic 2-cell Li-Ion/Polymer battery charger that operates over a 9V to 32V input voltage range (11.5V minimum start-up voltage). The LT3650 provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A, set using an external current ...

Circuit 

 

LT3650-8.2 11.5V to 32V 2-Cell 2A Li-Ion Charger

Jan 19th 2015
The LT3650 is a complete monolithic 2-cell Li-Ion/Polymer battery charger that operates over a 9V to 32V input voltage range (11.5V minimum start-up voltage). The LT3650 provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A, set using an external current ...

Circuit 

 

LT3652HV Basic 2A 1-Cell LiFePO4 Charger (3.6V Float) with C/10 Termination

Jan 15th 2015
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 

 

LT3651-4.1 6.5V to 32V Single Cell 4A Charger

Jan 14th 2015
The LT®3651 is a 1 cell 4A Li-Ion/Polymer battery charger that operates with input voltages up to 32V. An efficient monolithic average current mode synchronous switching regulator provides constant current, constant voltage charging with programmable maximum charge current. A charging cycle starts with battery insertion ...

Circuit 

 

LT3651-8.2 9V to 32V 4A 2-Cell Li-Ion Charger

Jan 14th 2015
The LT®3651-8.2/LT3651-8.4 are 2-cell, 4A Li-Ion/Polymer battery chargers that operate over a 9V to 32V input voltage range. An efficient monolithic average current mode synchronous switching regulator provides constant current, constant voltage charging with programmable maximum charge current. A charging cycle starts with ...

Circuit 

 

LTC4011 3A NiMH Charger with Full PowerPath Control

Jan 9th 2015
The LTC4011 provides a complete, cost-effective nickel battery fast charge solution in a small package using few external components. A 550kHz PWM current source controller and all necessary charge initiation, monitoring and termination control circuitry are included. ...

Circuit 

 

LTC4011 Simple 1A NiCd Application

Jan 9th 2015
The LTC4011 provides a complete, cost-effective nickel battery fast charge solution in a small package using few external components. A 550kHz PWM current source controller and all necessary charge initiation, monitoring and termination control circuitry are included. ...

Circuit 

 

LTC4011 Full-Featured 2A NiMH Application

Jan 9th 2015
The LTC4011 provides a complete, cost-effective nickel battery fast charge solution in a small package using few external components. A 550kHz PWM current source controller and all necessary charge initiation, monitoring and termination control circuitry are included. ...

Circuit 

 

LTC4121 Temperature Compensation SLA Charging with LTC4121

Jan 9th 2015
Consider the design of a sealed lead acid charger with temperature compensation of the float voltage. Sealed Lead Acid batteries require the float voltage be decreased as cell temperature rises. With the LTC4121 this is achieved using an NTC thermistor in the feedback pin divider as shown in the figure above. Using the circuit ...

Circuit 

 

LTC4121 Solar Panel Charging 4.2V Li-Ion Battery at 400mA

Jan 9th 2015
The LTC®4121 is a 400mA constant-current/constantvoltage (CC/CV) synchronous step-down battery charger. In addition to CC/CV operation, the LTC4121 regulates its input voltage to a programmable percentage of the input open-circuit voltage. This technique enables maximum power operation with high impedance input sources such ...

Circuit 

 

LT3796 SEPIC Sealed Lead Acid (SLA) Battery Charger

Sep 23rd 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 several ...

Circuit 

 

LTC4020 5V to 30V to 6V Lead-Acid PowerPath Charger

Sep 23rd 2014
The LTC®4020 is a high voltage power manager providing PowerPath™ instant-on operation and high efficiency battery charging over a wide voltage range. An onboard buck-boost DC/DC controller operates with battery and/or system voltages above, below, or equal to the input voltage. ...

Circuit 

 

LTC4020 15V to 55V to 6-cell Li-Ion PowerPath Charger

Sep 23rd 2014
The LTC®4020 is a high voltage power manager providing PowerPath™ instant-on operation and high efficiency battery charging over a wide voltage range. An onboard buck-boost DC/DC controller operates with battery and/or system voltages above, below, or equal to the input voltage. ...

Circuit 

 

LTC4020 24V to 55V Input to 12-cell Li-Ion (48V) PowerPath Charger

Sep 23rd 2014
The LTC®4020 is a high voltage power manager providing PowerPath™ instant-on operation and high efficiency battery charging over a wide voltage range. An onboard buck-boost DC/DC controller operates with battery and/or system voltages above, below, or equal to the input voltage. ...

Circuit 

 

LTC4020 9V to 55V lead-acid (18V) charger/system supply

Sep 23rd 2014
The LTC®4020 is a high voltage power manager providing PowerPath™ instant-on operation and high efficiency battery charging over a wide voltage range. An onboard buck-boost DC/DC controller operates with battery and/or system voltages above, below, or equal to the input voltage. ...

Circuit 

 

LTC4000 48V to 10.8V at 10A Buck Converter 3-Cell LiFePO4 Battery Charger with 2.9h Termination Timer, 1.25A Trickle Charge Current and Charging PFET Thermal Protection

Sep 23rd 2014
The LTC®4000 is a high voltage, high performance controller that converts many externally compensated DC/DC power supplies into full-featured battery chargers. ...

Circuit 

 

LTC4000 6V to 21V at 5A Boost Converter 5-Cell Li-Ion Battery Charger with C/10 Termination and 0.55A Trickle Charge Current

Sep 23rd 2014
The LTC®4000 is a high voltage, high performance controller that converts many externally compensated DC/DC power supplies into full-featured battery chargers. ...

Circuit 

 

LTC4000 8V to 72V IN to 4.2V at 2.0A Isolated Flyback Single-Cell Li-Ion Battery Charger with 2.9h Timer Termination and 0.22A Trickle Charge Current

Sep 23rd 2014
The LTC®4000 is a high voltage, high performance controller that converts many externally compensated DC/DC power supplies into full-featured battery chargers. ...

Circuit 

 

Doubling the LTC4120 Wireless Power Receiver for Higher Battery Charge Current

Andy Bishop - Design Engineer
Gabino Alonso - Strategic Marketing Engineer
Aug 27th 2014
The LTC4120 is a constant-current/constant-voltage wireless receiver and battery charger. The charge current is programmed up to 400mA with an external resistor. If more than 400mA is required, then use two LTC4120 devices operating in parallel as shown in this schematic. In this case the two LTC4120 operate from one transmitter ...

Blog Post Circuit LTspice 

 

LT3796 SEPIC LED Driver with 100:1 Analog Dimming

Aug 25th 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 several ...

Circuit LTspice 

 

LT3652HV Wall Adapter to 5-Cell LiFePO4 Battery Charger

Aug 4th 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 LTspice 

 

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 can ...

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 

 

LT3652 Solar Battery Charger Maintains High Efficiency in Low Light

Jay Celani - Staff Design Engineer 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 

 

LTC4120 Wireless Power Receiver and 400mA Buck Battery Charger

Oct 4th 2013
The LTC®4120 is a constant-current/constant-voltage wireless receiver and battery charger. An external programming resistor sets the charge current up to 400mA. The programmable float voltage of the LTC4120 accommodates several battery chemistries. The LTC4120 uses a Dynamic Harmonization Control (DHC) technique that allows ...

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 SEPIC Converter with RWIRE Compensation and Output Current Limit

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 several ...

Circuit 

 

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

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 several ...

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 several ...

Circuit 

 

LT3652 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 float voltage feedback reference, so any ...

Circuit 

 

LT3652 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 LTspice 

 

LTC4000: 48V to 10.8V at 10A Buck Converter Charger for 3-Series LiFePO4 Battery Pack

Dec 22nd 2006
Building a complete charging system with the LTC4000 and a DC/DC converter is nearly as easy as using a dedicated charger IC. Figure 5 shows the LTC4000 controlling an LT3845A buck converter in a charger designed for a 3S LiFePO4 battery pack (3S refers to three cells in a series configuration). The LT3845A buck converter is ...

Circuit LTspice 

 

LT1512: 5V to 25Vin, 5.2Vfloat@0.5A SEPIC Charger

Mar 11th 1996
The LT1512 is a 500kHz current mode switching regulator specially configured to create a constant-current/constant-voltage battery charger. In addition to the usual voltage feedback node, it has a current sense feedback circuit for accurately controlling output current of a flyback or SEPIC (Single-Ended Primary Inductance Converter) ...

Circuit LTspice 

 

LT1510: 500kHz Smallest Li-Ion Cell Phone Charger (0.8A)

Nov 14th 1995
With switching frequency as high as 500kHz, The LT1510 current mode PWM battery charger is the simplest and most efficient solution to fast-charge modern rechargeable batteries including lithium-ion (Li-Ion), nickelmetal-hydride (NiMH) and nickel-cadmium (NiCd) that require constant-current and/or constant-voltage charging. ...

Circuit LTspice