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Recover the leakage energy of a flyback transformer - 04/18/13 EDN Design Idea This design can recover the leakage energy of a flyback
transformer and minimize over-voltage stress to the switching device. . . [by Todor Arsenov]
Royer Flyback driver - This circuit is an auto-oscillating, resonant, current fed High voltage DC-DC converter. The
output voltage is calculated as follows Vout = Vin * pi * Nsecondary / Nprimary. The primary peak voltage is Vin
* pi , and the rms voltage is Vin*pi*0. 7 . . .
Simple and Efficient Sub-2W Isolated Power Supply - 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. . . [Linear Technology App Note - , Min Chen Senior Design Engineer-Power Products Nov 5th 2012]
Simple High Efficiency Isolated Flyback Supply Without Optoisolator - DN1011 Design Notes (Linear Technology). . . [Linear Technology]
Simple Negative
Supply Circuit - This simple circuit consists of two
LEDs and a photo diode. It generates a negative voltage with a current level of a couple milliamps. It is ideal
for supplying a negative rail to low power “rail to rail” op Amp circuits, which need to have a true zero volts
output. Note: This circuit is not particularly efficient . . . [Hobby Circuit designed by David A. Johnson P.E.,
07/13/06]
Single Transistor Flyback Driver - . . .
Switch-mode Power Supply
for a Tube Car Amplifier - To minimize heat loss on any
transistor, I use two pass FETs. In the car, input voltage is either 11. 5-12. 5V (engine off) or 13.5-14. 5V
(engine on). In the first case, T1 and T2 are fully ON, no need for heatsink. In the second case, T1 is OFF, T2
ON, all voltage and power excess. . . [klausmobile @ yahoo.Com]
Synchronous flyback circuit provides high-efficiency conversion - 07/22/04 EDN Design Idea Buck regulators are usually the first choice when you design
nonisolated step-down regulators unless the ratio of VIN to VOUT is greater than 10, the input voltage is high,
or both. Low duty cycle can be problematic for FET drivers. . . [by Wayne Rewinkel, National Semiconductor,
Phoenix, AZ]
The Output Adjustable Flyback
Converter - A high voltage step-up DC power supply using
adjustable flyback conversion. . . . [Simon Oh, designer]
Transformer Design Consideration for
off-line Flyback Converters Using Fairchild Power Switch FPStm/AN-4140 - Fairchild App Note - . . .
Two Phases to Cut Current and Improve EMI - 11/12/09 EDN Design Idea In DC/DC-converter applications in which the input voltage may be
lower or higher than the output voltage, you can use either a flyback converter or a SEPIC
(single-ended-primary-inductor converter). SEPICs offer lower input-current. . . [by Goran Perica, Linear
Technology App Note - , Milpitas, CA]
UCC3819 250-W Pfc Boost follower
Preregulator Design - This is an application note that
describes a reference design. This paper reviews the benefits of a boost follower topology and the design of a
250-W PFC boost follower preregulator. . . .
Universal Input 48W PFC Application - The LT3798 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, . . . [Linear Technology App Note - , Dec 5th 2011]
Use Two Phases to Cut Current and Improve EMI - 11/12/09 EDN Design Idea In DC/DC-converter applications in which the input voltage may be
lower or higher than the output voltage, you can use either a flyback converter or a SEPIC
(single-ended-primary-inductor converter). SEPICs offer lower input-current. . . [by Goran Perica, Linear
Technology App Note - , Milpitas, CA]
VFD (Vacuum Fluorescent Display) Flyback Power
Supply - The LT3758 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 converter. The LT3758 drives a low side external N-channel power
MOSFET from an internal regulated 7. 2V supply. The fixed frequency, current-mode architecture results in stable
operation over a wide range of supply and output voltages. . . [Linear Technology App Note - , Jan 16, 2012]
VFD (Vacuum Fluorescent Display) Flyback Power
Supply - The LT3758 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 converter. The LT3758 drives a low side external N-channel power
MOSFET from an internal regulated 7. 2V supply. The. . . [Linear Technology App Note - , Jan 16th 2012]
Voltage
Converters-0.5 to 6 Volts - Conventional silicon
transistors just can't operate at voltages less than about 0. 7v. Old germanium transistors could be used, but
those are hard to find these days and most are rather large in size. Some new n-channel MOSFET devices with very
. . . [Circuit by Dave Johnson P.E., 05/21/07]
Your source for cheap n' easy high
voltage, the Flyback transformer - A very simple road to
your basic high voltage generator is the transistor driven flyback transformer. This circuit uses a common
flyback transformer (you probably have more than one in your house right now) to boost typical battery voltages
up to the multi-kilovolt range. It will make a several thousand-degree continuous 2 cm plasma arc. This page is
designed to help you get yours working as quickly and painlessly as possible. . . [Greg Miller] |
