audio_engineering:class_b_power_calculations
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audio_engineering:class_b_power_calculations [2022/12/13 20:35] – [Power Calculations for Class B Amplifiers] mithat | audio_engineering:class_b_power_calculations [2023/08/01 23:47] (current) – [Maximum power dissipation] mithat | ||
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<WRAP center tip round box 60%> | <WRAP center tip round box 60%> | ||
- | < | + | **Power into the load** |
`bar(P_L) = (v_(op))^2/ | `bar(P_L) = (v_(op))^2/ | ||
Line 18: | Line 18: | ||
The maximum power into the load happens when `v_(op)` is at its maximum possible value of `V_(C C)`. | The maximum power into the load happens when `v_(op)` is at its maximum possible value of `V_(C C)`. | ||
- | ===== Required supply power ===== | + | ===== Required supply power for given output |
We start by calculating `bar(P_S)_(V+)`, | We start by calculating `bar(P_S)_(V+)`, | ||
Line 63: | Line 63: | ||
<WRAP center round tip 60%> | <WRAP center round tip 60%> | ||
- | < | + | **Required supply power for given output |
- | `bar(P_S) = 2/pi * v_(op)/R_L * V_(C C)` | + | **`bar(P_S) = 2/pi * v_(op)/R_L * V_(C C)` |
</ | </ | ||
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<WRAP center round tip 60%> | <WRAP center round tip 60%> | ||
- | < | + | **Maximum required supply power** |
`bar(P_S)_max = 2/pi * (V_(C C))^2/R_L` \\ or \\ | `bar(P_S)_max = 2/pi * (V_(C C))^2/R_L` \\ or \\ | ||
Line 124: | Line 124: | ||
<WRAP center round tip 60%> | <WRAP center round tip 60%> | ||
- | < | + | **Maximum power dissipation** |
`P_(Dmax) = 2/pi^2 * (V_(C C))^2/ | `P_(Dmax) = 2/pi^2 * (V_(C C))^2/ | ||
`P_(Dmax) = 4/pi^2 P_(L max)` | `P_(Dmax) = 4/pi^2 P_(L max)` | ||
- | < | + | **occurs when** |
`v_(op) = 2/pi V_(C C)` | `v_(op) = 2/pi V_(C C)` | ||
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<WRAP center round tip 60%> | <WRAP center round tip 60%> | ||
- | < | + | **Maximum power efficiency** |
`eta_max ~~ 78.5%` | `eta_max ~~ 78.5%` | ||
</ | </ | ||
audio_engineering/class_b_power_calculations.1670963705.txt.gz · Last modified: 2022/12/13 20:35 by mithat