| ??? 08/13/10 11:33 Read: times |
#177981 - more info Responding to: ???'s previous message |
Michael Karas said:
Mahmood,
You did not tell us with the supply or source DC voltage level is for your device. Also you state that it is the WIFI module that gets hot when it consumes 2.64W (0.8A at 3.3V). If it is indeed the transmitter module that gets too hot then the solution space will have to include cooling ideas like moving some air or applying a heat sink. Yes I'm using a 12 to 14 vdc input source. Since I'm in the 2nd prototype phase I didn't design the power supply section yet, I used external SMPS unit to supply 3.3VDC. Yes the transmitter gets heated up but fortunately I don't turn the transmitter on all the time. Only when necessary to transfer data. Generally you would use a linear regulator after a switcher if you need to have very quiet and noise free voltage rail. To me this would apply more to things like analog circuits and sensors. It should be possible to select and devise a switching power supply solution that can work with a microcontroller and a WIFI module. For low volume application you should certainly take a look at ready made voltage regulator modules. If you are faced with a cost sensitive higher volume application then you may be faced with the task of getting a switcher circuit designed into your product board. Yes this is what I thought, since no analog circuitry is involved, I don't need super clean power supply. I'm pushed for space and I need to make the unit as small as possible, as simple as possible, this is why I'm looking fopr ready made switchers. I'm producing 50 units now and hopefully will go into mass production in the future, so I need to make a good design. Mahmood |
| Topic | Author | Date |
| voltage regulator | 01/01/70 00:00 | |
| Regulators | 01/01/70 00:00 | |
| more info | 01/01/70 00:00 | |
| Better than LM2756 | 01/01/70 00:00 | |
| Better than LM2576 | 01/01/70 00:00 | |
Not unusual... | 01/01/70 00:00 |