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What is PSR flyback?
A flyback solution that uses an auxiliary-less (“auxless”) primary-side regulation (PSR) feature can simplify magnetic design and improve performance of the output- voltage static regulation.
What is PSR in electrical?
The Trainnet® Compact Power Supply Unit (PSR) is a highly reliable switching mode power supply module. It takes power directly from the train batteries. The Trainnet® PSR module is primarily designed to power the Trainnet® RIOM but can also be used for some simple VMEbus systems.
What is primary-side regulation?
Primary-Side Regulation Due to transformer characteristics, this auxiliary transformer output is directly related to the converter’s output voltage. This is especially useful in high-voltage applications, because it reduces the isolation voltage requirements of the components, which also has lowers total cost.
How does a high voltage switcher use PSR?
That high-voltage switcher integrates a high-voltage power FET plus a controller that uses PSR, supporting magnetically sensed output voltage regulation via the transformer bias winding. The sensing eliminates the need for a secondary-side reference, error amplifier and optical isolator for output-voltage regulation.
What’s the difference between PSR and SSR power supply?
In the other hand, PSR controllers are typically internally compensated, which can save time and effort for control-loop design. For applications with high surge or isolation voltage requirements, reducing the number of components crossing the isolation barrier reduces the number of areas that could potentially break down.
What kind of DCM does a PSR controller use?
And because most PSR controllers use “knee point sampling” for feedback, the controller only operates in discontinuous conduction mode (DCM). The output voltage ripple will be higher than in continuous conduction mode (CCM).
What’s the difference between optocoupler and flyback transistor?
Traditionally, an optocoupler transistor provides this isolation. Compared to the classic flyback topology, the key difference is adding an optocoupler such as the TI TL431, along with several resistors and capacitors, to constitute the feedback loop and error-amplifier-compensated circuit.