Saturday, April 10, 2010

Power supplies study


I will first start with the bottom side of the board which is mostly dedicated to power supplies generation and distribution.

On the following picture I've outlined various sections :

First we have the power supplies dispatchment which is mainly creating several supplies plans from the initial supply, starting with a ferrite bead which can serve as a fuse, some filtering with a inductor and a big output capacitor.

Secondly, there are secondaries voltages generated with regulators which are located in regulator sections 1 and 2.

And finally, a BA5888FP motor controller chip.

I will provide, as I finished them, analysis and schematics for these 3 sections.

A) Power supplies dispatchment

Here is a close up of the power supplies plans and components :

B) Regulator section 1

Here is a close up of the regulator components :

Next is a design taken from the TPS64201 Step down controller's datasheet, which is implemented by SONY on the board :

C) BA5888FP section

Here is a close up of the Motor driver IC :

This is based on the following datasheet diagram of an equivalent component :

Ok, schematic tool in place !

Schematics available as soon as I edit them !

Coming soon .....


  1. Bonjour stefde69,

    Je me tourne vers vous afin de savoir si vous pouvez me donner la demarche a suivre afin que je puisse reprogrammer mes volets roulants de chez becker sans ce fameux cable de programmation.
    Vous avez ecrit,je cite:Mais après coup de fil chez Becker, on peut reproduire le fonctionnement de ce fameux câble de programmation en court circuitant les câbles d'une certaine façon, et cela fonctionne !!