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Solutions Search - Secondary Side Controllers

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 

 

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 

 

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 

 

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 

 

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/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 

 

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 

 

DC1929A - LT3752EFE-1/ LT8311EFE Demo Board | 150V ≤ VIN ≤ 400V, VOUT = 12V @ 16.7A

Apr 14th 2014
Demonstration circuit 1929A is a 200W active clamp forward converter featuring the LT®3752-1/LT8311 chipset. The LT8311 is a secondary-side synchronous rectifier controller. The solution operates at about 100kHz and produces an isolated, regulated 12V / 16.7A output from an input voltage ranging from 150V to 400V, making ...

Demo Board LTspice 

 

Synchronous Forward MOSFET Driver Eliminates Signal Transformer

Apr 2nd 2014
MILPITAS, CA - April 2, 2014 - Linear Technology Corporation announces the LT8311, a high efficiency secondary-side MOSFET driver that operates without the need for primary control in an isolated synchronous forward converter. The LT8311’s unique preactive mode eliminates the need for a signal transformer for primary to secondary-side communication ...

Press Release 

 

LT3752-1 150V to 400V, 12V/16.7A, 200W Active Clamp Isolated Forward Converter

Mar 4th 2014
The LT®3752/LT3752-1 are current mode PWM controllers optimized for an active clamp forward converter topology. A DC/DC housekeeping controller is included for improved efficiency and performance. The LT3752 allows operation up to 100V input and the LT3752-1 is optimized for applications with input voltages greater than ...

Circuit 

 

LT3752 75V to 150V, 24V/14A 340W No-Opto, Active Clamp Isolated Forward Converter

Mar 4th 2014
The LT®3752/LT3752-1 are current mode PWM controllers optimized for an active clamp forward converter topology. A DC/DC housekeeping controller is included for improved efficiency and performance. The LT3752 allows operation up to 100V input and the LT3752-1 is optimized for applications with input voltages greater than ...

Circuit 

 

LT3752 18V to 72V, 12V/12.5A, 150W No-Opto, Active Clamp Isolated Forward Converter

Mar 4th 2014
The LT®3752/LT3752-1 are current mode PWM controllers optimized for an active clamp forward converter topology. A DC/DC housekeeping controller is included for improved efficiency and performance. The LT3752 allows operation up to 100V input and the LT3752-1 is optimized for applications with input voltages greater than ...

Circuit 

 

Flyback Synchronous Rectifier Driver Provides 10A Output Current

Mar 3rd 2014
MILPITAS, CA - March 3, 2014 - Linear Technology Corporation announces the LT8309, a flyback secondary-side synchronous rectifier driver that replaces the output diode with a MOSFET, allowing up to 10A output current without the use of a heat sink. The maximum output current of a flyback power supply has been limited by the ...

Press Release 

 

DC1994A - LT3752EFE/LT8311EFE Isolated Demo Board | 18V ≤ VIN ≤ 72V; VOUT: 12V @ 12A

Feb 26th 2014
Demonstration circuit 1994A 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 small solution size attainable using these parts. It operates at 240kHz and produces a regulated 12V, ...

Demo Board LTspice 

 

Isolated Forward Converter Integrated Circuits Specified over -55°C to 125°C Junction Temperature Range

Jun 13th 2011
MILPITAS, CA – June 13, 2011 – Linear Technology Corporation announces the high reliability (MP-grade) version of the LT1952/-1, LTC3900 and LT4430. These devices combine to create a high efficiency (up to 95%) synchronous rectified isolated forward converter that is specified and production tested over a -55°C ...

Press Release 

 

DC1317A-G - LT1952EGN-1/LTC3900 Demo Board | Active Reset, Vin=9V-36V Vout=12V @ 5A

Oct 7th 2009
Demonstration circuit 1317A-G is an isolated input to high current output 1/8th brick footprint synchronous forward converter featuring the LT®1952 switching controller with Active Reset circuit. The Active Reset circuit can improve the efficiency in wide input voltage applications. Also, the Active Reset allows the implementation ...

Demo Board 

 

DC1317A-C - LT1952EGN-1/LTC3900 Demo Board | Active Reset, Vin=18V-72V Vout=12V @ 10A

Dec 21st 2003
Demonstration circuit 1317A-C is isolated input to high current output 1/8th brick footprint synchronous forward converter featuring the LT®1952 switching controller with Active Reset circuit. The Active Reset circuit can improve the efficiency in wide input voltage applications. Also, the Active Reset allows the implementation ...

Demo Board