Stereo 3W Audio Power Amplifiers with Headphone Drive and Input Mux
Functional Diagrams
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| 4.5V TO 5.5V |
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| 100∝F |
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| 0.1∝F |
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| 11, 25 | 3, 4 |
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| PVDD | VDD |
| GAINLB | 8 |
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| GAIN |
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| 10kΩ |
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| SET | GAINLA | 7 | 0.047∝F |
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| 0.68∝F 15kΩ |
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| MUX |
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| AUDIO |
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| 33.2kΩ |
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| 5 | INL1 | 2:1 |
| 10kΩ |
| 27.4kΩ |
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| INPUT |
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| 6 | INL2 | INPUT |
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| 15kΩ | 10kΩ |
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| AUDIO |
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| OUTL+ | 10 |
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| MUX |
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| INPUT |
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| 0.68∝F | 15kΩ |
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| 220∝F |
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| 17 | BIAS |
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| 10kΩ |
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| BIAS |
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| 10kΩ |
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| 1∝F |
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| OUTL- | 12 |
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| GAIN | GAINRB | 22 |
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| 10kΩ |
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| SET | GAINRA | 21 | 0.047∝F |
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| 0.68∝F | 15kΩ |
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| MUX |
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| 33.2kΩ |
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| AUDIO | INR1 |
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| 27.4kΩ |
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| 19 | 2:1 |
| 10kΩ |
| 15kΩ |
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| INPUT |
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| 20 | INR2 | INPUT |
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| AUDIO |
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| OUTR+ | 24 | 10k | Ω |
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| MUX |
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| INPUT 0.68∝F | 15kΩ |
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| 220∝F |
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| 4.5V TO 5.5V |
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| 10kΩ |
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10kΩ | 1kΩ | 1kΩ |
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| 10kΩ |
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| 14 | SHDN |
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| OUTR- | 26 |
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TO |
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| 28 | SCL |
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| 1 | SDA | LOGIC |
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∝CONTROLLER |
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| 15 | ADD |
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| 2 | INT |
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| HPS | HPS | 16 |
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| MAX9777 | GND | PGND |
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| 18 | 9, 13, 23, 27 |
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| ______________________________________________________________________________________ | 23 | ||||||||||
MAX9777/MAX9778