MLAT problem after upgrade to 3.8.0

[abcd567]

Fully agree with @caius

July 2017

@abcd567

Regulated Power Supplies have:
(1) Good output voltage regulation (see diagrams 1 & 2 ), so that:
— No-load voltage is not too high from rated voltage.
— Full-load voltage is not too low from rated voltage.

(2) Filtering of ac ripple so that output dc voltage is constant (see diagram 3)

Diagram 1 - variation of output dc voltage with load current.

Diagram 2 - Comparison of Regulated switching mode vs Unregulated dc supply.

Diagram 3 - Ripple in dc output before (gray) and after (red) regulation & filtering.

 

March 2018

@abcd567

Important thing is Regulation, not linear or switching type. Poor regulation in any of the two types can cause malfunction or even failure of the equipment which is being powered. It is the Section B of the power supply adapter in the flow chart below which determines the quality of power supply.

1. LINEAR type power supply adapter
   AC >> Section A (ac to 5V dc converter, linear type) >> Section B (regulator) >> dc output.

2. SWITCHING type power supply adapter
   AC >> Section A (ac to 5V dc converter, switching type) >> Section B (regulator) >> dc output.

The main advantage of switching type over linear type is that switching type has higher efficiency, generates less heat, and is lighter than linear type of same rating.

The main disadvantage of switching type is that it generates more RF noise than the linear type