Hello
jlesterp and Happy New Years with all the best wishes that come with it
Can the
MEAN WELL ERPF-400-48 switching power supply not be a better choice with regard to its technical sheet, specificities and
especially without fan ?
It is resistant to moisture and dust, which also looks interesting...
Its ripple (240mVp-p) and leakage current (<1ma/240VAC) are weaker and should therefore give better '
results' although the rated current is lower by 1.1A (8.3A instead of 9.4A) but it should be sufficient if we refer to the technical data of TI for the TPA3255.
She mainly has a build-in
active PFC fonction
However, the '
availability' is only 70% from 50°C ambient temperature for the
ERPF version while the
LRS is always 100%.
This problem should be able to be resolved for the most part by removing the top cover of the power supply...
An important point is the
operating frequency (450, 500 or 600kHz) of the
TPA 3255.
Indeed, the rise in circuit temperature is directly conditioned by this parameter which gives better results when it is the highest.
Everything remains a question of compromise when choosing the box that will house the PCBs.
The more voluminous and airy the box, the less delicate will be the choice of the power supply and consequently of the value of the adjustment resistor for the choice of the frequency of use of the TPA3255
Can you give us your opinion and expertise ?