Anomalie #216: Add a second fan to balance current between -12/+12 and for better heat protection - FC005-ElectronicLoad - François Cerbelle's Redmine

Actions

Copy link

Anomalie #216

open

Evolution #214: Convert the whole security block to use only -12/+12 (no GND/5V anymore)

Add a second fan to balance current between -12/+12 and for better heat protection

Added by François Cerbelle over 4 years ago. Updated over 4 years ago.

Status:

Résolu

Priority:

Normal

Assignee:

Target version:

1.1

Start date:

07/03/2020

Due date:

% Done:

100%

Estimated time:

2:00 h

Spent time:

2:00 h

Description

One 12V fan draws current between GND/+12, and not between -12/GND. The consumption is unbalanced and Q4 becomes quite hot to compensate.
A second fan could better balance the consumption, letting Q3/Q4 remaining cold and with a better security for the MOSFETs