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Solutions Search - Flyback, Forward and Isolated Controllers

DC1341B - LT3757EDD SEPIC Demo Board | 4.5V ≤ Vin ≤ 36V; Vout = 5V @ 3A

Nov 3rd 2017
Demonstration circuit 1341B features LT®3757A in a 300kHz SEPIC converter circuit, designed for a 5V at 3A output from a 4.5V to 36V input voltage range.   ...

Demo Board 

 

DC2737A - LT8301ES5 Demo Board | No-Opto Isolated Flyback Converter, VIN = 10V to 32V, VOUT = 5V @ up to 700mA

Oct 31st 2017
Demonstration circuit 2737A is an isolated flyback converter featuring the LT®8301. The demo circuit outputs 5V from input 10V to 32V, with a nominal 24V. The output current capability increases with the input voltage. The standby input current of the demo circuit is less than 950μA (typical) at VIN = 24V.   ...

Demo Board 

 

No-Opto Flyback DC/DC Converters & Snubber Protection Circuits

Kevin B. Scott - Senior Strategic Marketing Engineer
George Qian - Senior Applications Engineer
May 2nd 2017
Flyback Solutions The flyback DC/DC converter topology is one of several topologies that allow the input voltage to be above or below the output voltage. The SEPIC and buck-boost topologies also allow this, but there are times when a flyback is the more desirable solution: namely when isolation is required (for noise immunity ...

Blog Post 

 

LT8310/LT1431 92W Isolated Forward Converter with Opto Feedback; VIN = 48V, VOUT = 54V@1.7A

George Qian - Senior Applications Engineer Mar 29th 2017
The LT8310 is a constant-frequency resonant reset forward converter controller with a low side N-channel MOSFET gate driver. The LT8310 has a wide input voltage range from 6V to 100V. Its switching frequency can be programed from 100kHz to 500kHz to optimize efficiency, performance or external component size. The LT8310’s ...

Blog Post Circuit LTspice 

 

100V No-Opto Flyback Regulator Operates at 150°C Delivering up to 24W & Producing up to a 1kV Output Voltage

Mar 6th 2017
MILPITAS, CA – March 6, 2017 – Linear Technology Corporation announces the H-grade versions of the LT8304/-1, monolithic flyback regulators with guaranteed operation for junction temperatures as high as 150°C. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires ...

Press Release 

 

100V No-Opto Flyback Regulator Delivers 5 Watts in SOT-23 Package & Operates at 150°C

Feb 9th 2017
MILPITAS, CA – February 9, 2017 – Linear Technology Corporation announces the H-grade version of the LT8303, a monolithic flyback regulator with guaranteed operation for junction temperatures as high as 150°C. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires ...

Press Release 

 

560V No-Opto Flyback Regulator Delivers Up to 15 Watts in High Voltage Spacing TSSOP Package

Feb 7th 2017
MILPITAS, CA – February 7, 2017 – Linear Technology Corporation announces the LT8315, a high voltage monolithic flyback regulator that simplifies the design of an isolated DC/DC converter. By sampling the reflected isolated output voltage across the third winding on the power transformer, the part requires no opto-isolator ...

Press Release 

 

DC2337A - LT8315EFE Isolated Demo Board | Offline Flyback, 90VAC ≤ VIN ≤ 265VAC, VOUT = 12V @ 0.55A

Jan 27th 2017
Demonstration circuit 2337A is an offline isolated flyback converter featuring LT®8315. The demo board outputs 12V, and maintains tight regulation with a load current from 4mA to 0.55A. It is optimized to operate over a wide AC input voltage range (90VAC to 265VAC, 47Hz to 63Hz). Output voltage accuracy stays within ±5% ...

Demo Board 

 

LT8315 12V High Input Voltage Isolated Flyback Converter

Jan 19th 2017
The LT®8315 is a high voltage flyback converter with integrated 630V/300mA switch. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated flyback waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces ...

Circuit 

 

LT8315 Wide Input Range Non-Isolated 12V Buck Converter

Jan 19th 2017
The LT®8315 is a high voltage flyback converter with integrated 630V/300mA switch. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated flyback waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces ...

Circuit 

 

LT8315 83% Efficiency 5V/1.5A Isolated Flyback Converter

Jan 19th 2017
The LT®8315 is a high voltage flyback converter with integrated 630V/300mA switch. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated flyback waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces ...

Circuit 

 

LT8315 85% Efficient Universal Input Offline Power Supply

Jan 19th 2017
The LT®8315 is a high voltage flyback converter with integrated 630V/300mA switch. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated flyback waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces ...

Circuit 

 

DC2199B-C - LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter with Sync Rectification, 36V ≤ VIN ≤ 60V; VOUT = 56V @ 5.4A

Nov 29th 2016
Demonstration circuit 2199B-C is a 300W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766 chip-set. It produces a regulated 56V, 5.4A output from an input voltage range of 36V to 60V. ...

Demo Board 

 

DC2138B - LT8301ES5 Isolated Demo Board | No-Opto Flyback, 10V ≤ VIN ≤ 32V, VOUT = 5V @ 0.7A to 1A

Oct 19th 2016
Demonstration circuit 2138B is an isolated flyback converter featuring the LT®8301. This demo circuit outputs 5V from a 10V to 32V input, with a nominal of 24V. The output current capability increases with the input voltage. The standby input current of the demo circuit is less than 950μA (typical) at VIN = 24V. ...

Demo Board 

 

LTC3723-1 130W Isolated Push-Pull Converter for PoE Applications with 93.5% Peak Efficiency

Jeoffrey (Zijian) Wang - Applications Engineer Oct 3rd 2016
This solution is a non-synchronous isolated push-pull converter designed for PoE applications, which can generate a 50V/2.6A output from a 34-38V (36V typical) input voltage range. A 93.5% peak efficiency is achieved for the whole isolated converter and the total solution can be fit into 1/8 brick footprint (2.3” x 0.9”) ...

Circuit LTspice 

 

100V No-Opto Flyback Regulator Delivers Up to 5 Watts in TSOT-23 Package

Sep 15th 2016
MILPITAS, CA – September 15, 2016 – Linear Technology Corporation announces the LT8303, a monolithic flyback regulator in a TSOT-23 package that significantly simplifies the design of isolated DC/DC converters. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires ...

Press Release 

 

DC2490A - LT8303ES5 Isolated Demo Board | No-Opto Flyback, 36V ≤ VIN ≤ 72V, VOUT = 5V @ up to 0.84A

Sep 7th 2016
Demonstration circuit 2490A is a micropower no-opto isolated flyback converter featuring the LT®8303. This demo circuit outputs 5V, and maintains tight regulation with a load current from 2.5mA to 0.84A over an input voltage from 36V to 72V. The output current capability increases with the input voltage, as shown in the ...

Demo Board LTspice 

 

LT8303 30V to 80Vin, 3.3Vout Isolated Flyback Converter

Aug 31st 2016
The LT8303 is a micropower high voltage isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with a single external resistor. Internal compensation and soft-start ...

Circuit 

 

LT8303 30V to 80Vin, 5Vout Isolated Flyback Converter

Aug 31st 2016
The LT8303 is a micropower high voltage isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with a single external resistor. Internal compensation and soft-start ...

Circuit 

 

LT8303 30V to 80Vin, 12Vout Isolated Flyback Converter

Aug 31st 2016
The LT8303 is a micropower high voltage isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with a single external resistor. Internal compensation and soft-start ...

Circuit 

 

LT8303 30V to 80Vin, 24Vout Isolated Flyback Converter

Aug 31st 2016
The LT8303 is a micropower high voltage isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with a single external resistor. Internal compensation and soft-start ...

Circuit 

 

LT8303 30V to 80Vin, 48Vout Isolated Flyback Converter

Aug 31st 2016
The LT8303 is a micropower high voltage isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with a single external resistor. Internal compensation and soft-start ...

Circuit 

 

No-Opto Isolated Flyback Converters

Jun 10th 2016
The no-opto isolated flyback parts from Linear need no opto-coupler or LT1431 shunt regulator for regulation. They sense the isolated output voltage directly from the primary-side waveform. This simplifies the design, allows for a smaller solution size and only requires one component crossing the isolation barrier. The load, ...

Blog Post 

 

LT8304 18V to 80VIN/5VOUT Isolated Flyback Converter

Jun 9th 2016
The LT®8304 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation ...

Circuit 

 

LT8304 18V to 80VIN/3.3VOUT Isolated Flyback Converter

Jun 9th 2016
The LT®8304 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation ...

Circuit 

 

LT8304 18V to 80VIN/24VOUT Isolated Flyback Converter

Jun 9th 2016
The LT®8304 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation ...

Circuit 

 

LT8304 18V to 80VIN/48VOUT Isolated Flyback Converter

Jun 9th 2016
The LT®8304 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation ...

Circuit 

 

LT8304 18V to 80VIN/12VOUT Isolated Flyback Converter

Jun 9th 2016
The LT®8304 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation ...

Circuit 

 

LT8304 –4V to –80VIN/12VOUT Buck-Boost Converter

Jun 9th 2016
The LT®8304 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation ...

Circuit 

 

LT8304 –18V to –80VIN/–12VOUT Negative Buck Converter

Jun 9th 2016
The LT®8304 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation ...

Circuit 

 

LT8304 4V to 100VIN/140VOUT Boost Converter

Jun 9th 2016
The LT®8304 is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation ...

Circuit 

 

DC2324A-C - LT3753EFE Isolated Demo Board | Sync Forward Controller with Active Clamp, 9V ≤ VIN ≤ 18V; VOUT = 24V @ 4A

May 25th 2016
Demonstration circuits 2324A-A, 2324A-B, and 2324A-C are active clamp forward converters with synchronous rectification featuring the LT®3753. These circuits were designed to demonstrate the high level of performance, efficiency and small solution size attainable using this part. They operate at 240kHz. The DC2324A-A produces ...

Demo Board 

 

DC2324A-B - LT3753EFE Demo Board | Isolated Forward Converter, 18V ≤ VIN ≤ 36V; VOUT = 24V @ 5A

May 25th 2016
Demonstration circuits 2324A-A, 2324A-B, and 2324A-C are active clamp forward converters with synchronous rectification featuring the LT®3753. These circuits were designed to demonstrate the high level of performance, efficiency and small solution size attainable using this part. They operate at 240kHz. The DC2324A-A produces ...

Demo Board 

 

DC2324A-A - LT3753EFE Demo Board | Isolated Forward Converter, 36V ≤ VIN ≤ 72V; VOUT = 24V @ 5A

May 25th 2016
Demonstration circuits 2324A-A, 2324A-B, and 2324A-C are active clamp forward converters with synchronous rectification featuring the LT®3753. These circuits were designed to demonstrate the high level of performance, efficiency and small solution size attainable using this part. They operate at 240kHz. The DC2324A-A produces ...

Demo Board 

 

DC2393A - LT8304ES8E Isolated Demo Board | No-Opto Flyback, 18V ≤ VIN ≤ 72V; VOUT = 5V @ 2A to 4.2A

May 25th 2016
Demonstration circuit 2393A is a micropower no-opto isolated flyback converter featuring the LT®8304. This demo circuit outputs 5.0V, and maintains tight regulation with a load current from 20mA up to 4.2A and over an input voltage from 18V to 72V. The output current capability increases with the input voltage, as shown ...

Demo Board LTspice 

 

100V Isolated Monolithic No-Opto Flyback Regulator Delivers up to 24 Watts

May 19th 2016
MILPITAS, CA - May 19, 2016 - Linear Technology Corporation announces the LT8304, a monolithic flyback regulator that significantly simplifies the design of isolated DC/DC converters. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no opto-isolator or third winding for ...

Press Release 

 

DC2175A - LT3752IFE/LT8311IFE Demo Board | Forward Converter with Sync Rectification, 9V ≤ VIN ≤ 36V; Vout = 12V @ 13A

Apr 27th 2016
Demonstration circuit 2175A is an active clamp forward converter with synchronous rectification featuring the LT®3752/LT8311 chipset. This circuit was designed to demonstrate the high levels of performance, efficiency and high power. It operates at 200kHz and produces a regulated 12V, 13A output from a wide input voltage ...

Demo Board 

 

Differences Between the Ćuk Converter and the Inverting Charge Pump Converter

Kevin B. Scott - Senior Strategic Marketing Engineer
Jesus Rosales - Applications Engineer
Mar 7th 2016
The Ćuk converter (also referred to as the two inductor inverting converter), the inverting charge pump and the single inductor inverting converter (also referred to as the inverting buck-boost) all provide a negative output voltage from a positive input voltage. However, engineers often unknowingly refer to these topologies ...

Blog Post 

 

DC2275A - LT8331 Demo Board | Boost, 10V ≤ VIN ≤ 48V, 120Vout @ up to 80mA

Dec 11th 2015
Demonstration circuit DC2275A features the LT®8331 in a boost configuration. The demo circuit demonstrates small size and low component count. The boost is designed to convert a 10V to 48V source to 120V at 25mA to 80mA. ...

Demo Board 

 

LT8331 36V to 72V Input,120V Boost Converter

Nov 4th 2015
The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very ...

Circuit LTspice 

 

LT8331 9V to 16V Input, 135V Boost Converter

Nov 4th 2015
The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very ...

Circuit 

 

LT8331 10V to 48V Input, 240V Boost Converter

Nov 4th 2015
The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very ...

Circuit 

 

LT8331 36V to 72V Input, 48V SEPIC Converter

Nov 4th 2015
The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very ...

Circuit LTspice 

 

LT8331 4.5V to 80V Input, 12V SEPIC Converter

Nov 4th 2015
The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very ...

Circuit 

 

LT8331 4.5V to 80V Input, 5V SEPIC Converter

Nov 4th 2015
The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very ...

Circuit 

 

LT8331 36V to 72V Input, –24V Inverting Converter

Nov 4th 2015
The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very ...

Circuit 

 

LT8331 4.5V to 80V Input, –12V Inverting Converter

Nov 4th 2015
The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very ...

Circuit 

 

LT8331 4.5V to 80V Input, –5V Inverting Converter

Nov 4th 2015
The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very ...

Circuit 

 

LT8331 40V to 80V Input, 5V Isolated Output Converter

Nov 4th 2015
The LT®8331 is a current mode DC/DC converter with a 140V, 0.5A switch operating from a 4.5V to 100V input. With a unique single feedback pin architecture, it is capable of boost, SEPIC, flyback or inverting configurations. Burst Mode operation consumes as low as 6μA quiescent current to maintain high efficiency at very ...

Circuit 

 

Monolithic Converter Delivers High Output Voltages

Jesus Rosales - Applications Engineer Nov 4th 2015
Design Note 545: Introduction Industrial, telecom, medical and automotive applications use a wide variety of regulated voltages to operate effectively, including high voltage and negative rails. When the designer is faced with producing industrial power supplies, the job can be simplified by minimizing the parts count, as well ...

Blog Post 

 

500mA, 140V Boost/SEPIC/Flyback/Inverting DC/DC Converter with IQ= 6μA

Nov 2nd 2015
MILPITAS, CA - November 2, 2015 - Linear Technology Corporation announces the LT8331, a current mode step-up DC/DC converter with an internal 500mA, 140V switch. It operates from an input voltage range of 4.5V to 100V, making it suitable for use with a wide range of input sources found in industrial, transportation and avionic ...

Press Release 

 

DC414B - LTC1871EMS | Boost Controller, 3V ≤ VIN ≤ 5V, Vout = 5V @ 7A

Aug 31st 2015
Demonstration circuit DC414 is a step-up (Boost) DC-DC converter featuring the LTC1871 controller. The circuit is capable of providing an output voltage of 5V at 7A (10A peak) from an input supply of 3.3V. External frequency synchronization is provided, as are two modes of operation at light load conditions: Burst mode™ ...

Demo Board 

 

DC2306A - LT3753EFE Isolated Demo Board | Forward Converter, 10V ≤ VIN ≤ 54V; VOUT = 48V or 54V (Jumper Selectable) @ 1.5A

Aug 24th 2015
Demonstration circuit 2306A is an active clamp forward converter featuring the LT®3753. This circuit was designed to demonstrate the high level of performance and efficiency that can be attained with the LT3753. It operates at 100kHz and produces a regulated 54V, 1.5A output from a wide input voltage range of 10V to 54V, ...

Demo Board LTspice 

 

DC2199A-B - LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter with Sync Rectification, 36V ≤ VIN ≤ 60V; VOUT = 24V @ 15A

Jun 2nd 2015
Demonstration circuit 2199A-B is a 360W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766 chip-set. It produces a regulated 24V, 15A output from an input voltage range of 36V to 60V. ...

Demo Board LTspice 

 

DC1547B - LT3757AEDD Boost Demo Board | Boost, 3.1V ≤ VIN ≤ 9V; VOUT = 12V @ 1.5A

May 29th 2015
Demonstration circuit 1547B features the LT®3757AEDD in a 400kHz BOOST converter circuit, designed for a 12V output from a 3.1V to 9V input voltage range. The LT3757A operates over an input range of 2.9V to 40V, suitable for applications from single-cell lithium-ion battery portable electronics up to high voltage automotive ...

Demo Board 

 

100V Flyback Controller Now Offered in Military -55°C to 150°C MP Grade

Mar 18th 2015
MILPITAS, CA - March 18, 2015 - Linear Technology Corporation announces a new military MP grade version of the LT3748, a high input voltage isolated flyback DC/DC controller. This device simplifies the design of an isolated DC/DC converter by not requiring an opto-isolator, third winding or signal transformer for feedback since ...

Press Release 

 

LT3753 9V-15V Input to 54V/3A Isolated Forward Converter

Randyco Prasetyo - Applications Engineer
Gabino Alonso - Strategic Marketing Engineer
Feb 26th 2015
The LT®3753 is a primary side, current-mode PWM controller optimized for an active clamp forward converter topology. It features a programmable volt-second clamp that provides a duty cycle guardrail to limit primary switch reset voltage and prevent transformer saturation during load transients. The LT3753 also features ...

Blog Post Circuit 

 

LT3752/LT8311 48Vin, 24Vout Active Clamp Forward Converter with High Light Load Efficiency

Fei Guo - Apps Engineer
Gabino Alonso - Strategic Marketing Engineer
Feb 11th 2015
The LT3752 includes a number of programmable features that make it suitable for this application. For instance, programmable delays between various gate signals is used to prevent cross-conduction and to optimize efficiency, and programmable turn-on current spike blanking (adaptive leading edge blanking plus programmable extended ...

Blog Post Circuit 

 

LT3798/LT8309 5V, 2A Energy Star Compliant Isolated Converter

Jesus Rosales - Applications Engineer
Gabino Alonso - Strategic Marketing Engineer
Feb 10th 2015
The focus of this circuirt was to take a design based on the LT®3798 and make it Energy Star Compliant; reduce no load, standby power to less than 300mW. That was achieved by adding the components highlighted in the dotted line box in the schematic inside the primary side. This circuit is simply a switch that removes ...

Blog Post Circuit LTspice 

 

LT8310/LT1431 81W Isolated Forward Converter with Opto Feedback; VIN = 12V/24V, VOUT = 54V@1.5A

George Qian - Senior Applications Engineer
Gabino Alonso - Strategic Marketing Engineer
Jan 30th 2015
The LT8310 is a constant-frequency resonant reset forward converter controller with a low side N-channel MOSFET gate driver. The LT8310 has a wide input voltage range from 6V to 100V. Its switching frequency can be programed from 100kHz to 500kHz to optimize efficiency, performance or external component size. The LT8310's protection ...

Blog Post Circuit LTspice 

 

Simple, Compact & Efficient Isolated Power with Low IQ No-Opto Flyback ICs

Min Chen - Senior Design Engineer Dec 12th 2014
The flyback converter is typically the first choice for engineers looking for isolated power supplies below 50W. These isolated power supplies generally require opto-isolators or extra transformer windings to regulate the output voltage. As a result, these isolated power supply solutions are generally complicated, bulky and ...

Video 

 

DC2049A - LT3999EMSE Isolated Demo Board | Dual Output Push-Pull Transformer Driver, 10V ≤ VIN ≤ 15.5V; VOUT = ±12V @ 0.2A

Nov 24th 2014
The DC2049A demonstrates how a power supply regulates two output voltage by using the LT®3999 and low dropout (LDO) regulators. The LT3999 is a monolithic push-pull DC/DC driver which features a wide input range and small external passive components. The LT3999 has duty circle control for ΔVIN compensation, which ...

Demo Board 

 

DC1694B - LT3748EMS Isolated Demo Board | No-Opto Flyback, 22V ≤ VIN ≤ 75V; VOUT = 12V @ 2.5A

Nov 18th 2014
Demonstration circuit 1694B is an isolated flyback converter featuring the LT®3748. The demo circuit is designed for a 12V output from a 22V to 75V DC input. The output current is up to 2.5A. The part senses the isolated output voltage directly from the primary side flyback waveform during the off time of the power switch. ...

Demo Board 

 

LT3999 36V, 1A 1MHz Push-Pull DC/DC Driver with Duty Cycle Control - Video Product Brief

Bruce Haug - Product Marketing Engineer Nov 18th 2014
The LT®3999 is a monolithic, high voltage, high frequency DC/DC transformer driver providing isolated power in a small solution footprint. The LT3999 has two 1A current limited power switches that switch out of phase. The duty cycle is programmable to adjust the output voltage. The switching frequency is programmed ...

Video 

 

DC2015A - LT8310EFE/LT8311EFE Isolated Demo Board | 36V ≤ VIN ≤ 72V; VOUT = 12V @ 12A

Nov 3rd 2014
Demonstration circuit 2015A is a resonant reset forward converter with synchronous rectification featuring the LT®8310/LT8311 chipset. This circuit was designed to demonstrate the high levels of performance, efficiency, and small solution size attainable using these parts. It operates at 240kHz and produces a regulated 12V, ...

Demo Board 

 

DC2199A-A - LTC3765EMSE/LTC3766EGN Isolated Demo Board | Forward Converter, 36V ≤ VIN ≤ 60V; VOUT = 12V @ 30A

Oct 24th 2014
Demonstration circuit 2199A-A is a 360W isolated forward converter with synchronous rectification featuring the LTC3765/LTC3766. It produces a regulated 12V, 30A output from an input voltage range of 36V to 60V. ...

Demo Board LTspice 

 

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 

 

36V Monolithic 1A Push-Pull DC/DC Transformer Driver with Programmable Duty Cycle Control

Sep 22nd 2014
MILPITAS, CA - September 22, 2014 - Linear Technology Corporation announces the LT3999, a monolithic push-pull isolated DC/DC transformer driver with two 1A current limited power switches. The LT3999 operates over an input voltage range of 2.7V to 36V, is targeted for power levels up to 15W and can produce a wide range of output ...

Press Release 

 

LT3999 12V to 12V, 10W Low Noise Isolated DC/DC Converter

Sep 12th 2014
The LT®3999 is a monolithic, high voltage, high frequency DC/DC transformer driver providing isolated power in a small solution footprint. ...

Circuit 

 

LT3999 5V to 12V, 10W Low Power Push-Pull DC Transformer

Sep 12th 2014
The LT®3999 is a monolithic, high voltage, high frequency DC/DC transformer driver providing isolated power in a small solution footprint. ...

Circuit 

 

LTC3803/LTC4441 6V -24V Input Voltage to 52V/2A Boost Converter

Sep 4th 2014
The LTC®4441/LTC4441-1 is an N-channel MOSFET gate driver that can supply up to 6A of peak output current. The chip is designed to operate with a supply voltage of up to 25V and has an adjustable linear regulator for the gate drive. The gate drive voltage can be programmed between 5V and 8V. ...

Circuit LTspice 

 

LT8471 Dual Multitopology Converter with 2A Switches - Video Product Brief

Jeff Gruetter - Product Marketing Engineer Aug 29th 2014
The LT®8471 is a dual PWM DC/DC converter containing two internal 2A, 50V switches and an additional 500mA switch to facilitate step-down and inverting conversion. Each 2A channel can be independently configured as a buck, boost, SEPIC, flyback or inverting converter. Capable of generating positive and negative outputs ...

Video 

 

100V Synchronous Forward Controller Regulates Output Voltage without an Opto-Coupler

Aug 20th 2014
MILPITAS, CA - August 20, 2014 - Linear Technology Corporation announces the LT8310, a primary-side synchronous forward controller. The LT8310 operates over an input voltage range of 6V to 100V, is targeted for power levels up to 200W and provides a drive signal for secondary-side synchronous rectification to improve efficiency. Output ...

Press Release 

 

DC1963A - LT8310EFE Demo Board | Isolated Forward Converter, 36V ≤ VIN ≤ 72V; VOUT = 12V @ 6A

Aug 18th 2014
Demonstration circuit 1963A is a resonant reset forward converter featuring the LT®8310 controller. This circuit was designed to demonstrate the high level of performance, and small solution size attainable using the LT8310. It operates at a 250kHz switching frequency, and regulates a 12V, 6A output from a 36V to 72V input ...

Demo Board LTspice 

 

LT8310/LTC3900 78W Isolated Synchronous Forward Converter

Aug 12th 2014
The LT®8310 is a simple-to-use resonant reset forward converter controller that drives the gate of a low side N-channel MOSFET from an internally regulated 10V supply. The LT8310 features duty mode control that generates a stable, regulated, isolated output using a single power transformer. With the addition of output voltage ...

Circuit 

 

LT8310/LT4430 78W Isolated Nonsynchronous Forward Converter with Opto Feedback

Aug 12th 2014
The LT®8310 is a simple-to-use resonant reset forward converter controller that drives the gate of a low side N-channel MOSFET from an internally regulated 10V supply. The LT8310 features duty mode control that generates a stable, regulated, isolated output using a single power transformer. With the addition of output voltage ...

Circuit 

 

LT8310/LT3900 Wide VIN, 60W Isolated 8V Rail for Low Voltage Regulators

Aug 12th 2014
The LT®8310 is a simple-to-use resonant reset forward converter controller that drives the gate of a low side N-channel MOSFET from an internally regulated 10V supply. The LT8310 features duty mode control that generates a stable, regulated, isolated output using a single power transformer. With the addition of output voltage ...

Circuit 

 

LT8310/LT8311 94% Efficient, 150W Isolated Synchronous Forward Converter

Aug 12th 2014
The LT®8310 is a simple-to-use resonant reset forward converter controller that drives the gate of a low side N-channel MOSFET from an internally regulated 10V supply. The LT8310 features duty mode control that generates a stable, regulated, isolated output using a single power transformer. With the addition of output voltage ...

Circuit 

 

LTC3803 5V Output Nonisolated Telecom Housekeeping Power Supply

Aug 6th 2014
The LTC3803 is a constant frequency current mode flyback controller optimized for driving N-channel MOSFETs in high input voltage applications. Constant frequency operation is maintained down to very light loads, resulting in less low frequency noise generation over a wide range of load currents. Slope compensation can be programmed ...

Circuit LTspice 

 

LT3752/LT8311 240W Isolated Forward Converter

Randyco Prasetyo - Applications Engineer Jul 28th 2014
The LT3752 includes a number of programmable features that make it suitable for this application. For instance, programmable delays between various gate signals is used to prevent cross-conduction and to optimize efficiency, and programmable turn-on current spike blanking (adaptive leading edge blanking plus programmable extended ...

Blog Post Circuit 

 

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