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Solutions Search - Flyback, Forward and Isolated Controllers

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 ...



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 ...



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 ...



Active Clamp Synchronous Forward Controllers

Wei Gu - Applications Engineer Jun 18th 2014
The LT3752, LT3752‑1 and LT3753 are active clamp forward controllers that minimize external component count, solution size and cost. Two of these controllers, the LT3752 and LT3753, are designed for inputs up to 100V. The LT3752-1 is designed for applications with input voltages greater than 100V, suitable for HV car ...



LT8302 42VIN Micropower No-Opto Isolated Flyback Converter with 65V/3.6A Switch - Video Product Brief

Bruce Haug - Product Marketing Engineer Dec 17th 2013
The LT®8302 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 ...

Video LTspice 


Simple and Efficient Sub-2W Isolated Power Supply

Min Chen - Senior Design Engineer Nov 5th 2012
The non-synchronous flyback topology is widely used in isolated power supplies ranging from sub watt power levels to tens of watts. With more green-mode standards emerging around the world, improving light load efficiency and reducing no-load input standby current are more demanding than ever. Unfortunately, the traditional ...



Design a Simple, Efficient and Reliable Forward Converter

Kurk Mathews - Applications Engineer Jun 14th 2012
Due to the high cost and inflexibility of isolated DC/DC converter modules, many designers are choosing to implement a discrete design that is better matched to their application. In particular, the forward converter with active clamp reset has been widely used in custom supplies because of its excellent efficiency and reduced ...



LT3798 Isolated No Opto-Coupler Flyback Controller with Active PFC - Video Product Brief

Bruce Haug - Product Marketing Engineer Mar 6th 2012
The LT®3798 is a constant-voltage/constant-current isolated flyback controller that combines active power factor correction (PFC) with no opto-coupler required for output voltage feedback into a single-stage converter. A LT3798 based design can achieve a power factor of greater than 0.97 by actively modulating the input current, ...



LTC3765/LTC3766 Isolated Forward Converter Chipset with Active Clamp Reset - Video Product Brief

Bruce Haug - Product Marketing Engineer Mar 6th 2012
The LTC®3765 is a start-up controller and gate driver for use in a self-starting secondary-side control forward converter. When combined with the LTC3766 secondaryside synchronous forward controller, a complete isolated power supply is created using a minimum of discrete parts. A proprietary scheme is used to multiplex gate ...



Isolated Flyback Controller with PFC Controls Voltage or Current

Jesus Rosales - Applications Engineer Oct 27th 2011
Linear Technology’s LT®3798 isolated controller with active power factor correction (PFC) is specifically designed for regulating bus voltages or driving constant current applications over a wide input range of 10V to 480V. It is ideal for constant voltage/current applications requiring 4W to over 100W power. The LT3798’s ...



LT3757 Boost, Flyback, SEPIC and Inverting Controller - Video Product Brief

Kevin B. Scott - Senior Strategic Marketing Engineer Jun 4th 2010
The LT3757 is a wide input range, current mode, DC/DC controller which is capable of generating either positive or negative output voltages. It can be configured as either a boost, flyback, SEPIC or inverting controller. The LT3757 drives a low side external N-channel power MOSFET from an internal regulated 7.2V supply. The ...

Video LTspice 


DC894A-A - LT3825EFE Demo Board I Synchronous Flyback Converter, Vin=36V-72V, Vout=3.3V@12A

Oct 15th 2009
Demonstration circuit 894A-A is a 36V-72Vin, synchronous flyback converter featuring the LT3825. This circuit was designed specifically to attain a high current, low ripple, synchronously rectified flyback to efficiently power 3.3V loads at up to 12A from a typical telecom input voltage range. This circuit features synchronous ...

Demo Board Video LTspice 


How To Design a Simple Isolated Flyback Converter - LT3573

Mike Negrete - Design Eng. Section Leader Mar 15th 2009
Isolated power supplies are needed in a wide variety of applications. Galvanic isolation is achieved by isolating two or more circuits using a transformer or optocoupler, and is desirable for many reasons: safety, noise immunity, circuit protection, etc. Traditionally, isolated power supplies use an optocoupler to transfer ...

Video LTspice