Difference between Linear Power Supply and SMPS:
The Difference between Linear Power Supply and SMPS is given in table below
Features |
Linear Power Supply |
SMPS |
| Efficiency | 25-50 per cent | 65-75 per cent |
| Temperature rise | 50-100 °C | 20-40 °C |
| Ripple value | Even 5 mV possible | Higher, 25 to 50 mV |
| Overall regulation | Even 0.1% is possible | 0.3% is common, tighter regulation is difficult to have |
| Magnetic material | Use of stalloy or CRGO core | Use of ferrite core |
| Weight | 20-30 W/kg | About 60 W/kg |
| Cost | Advantageous for smaller units up to 10-15 W, but bigger units are costlier | Higher cost because of more and special components |
| Reliability | More reliable | Depends upon availability of suitable transistors |
| Transient response | Faster (in μs) | Slower (in ms) |
| RF interference | None | Can pose problem unless properly shielded |
| Complexity | Less | More |