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STD EE/16/10632 - Audio Amplifier
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Update time：
2021-07-26 12:44:00
Creation time：
2021-07-26 09:59:23
Description
A common small signal NPN transistor drives a balanced power amplifier made of similar transistors. The output transistor pairs can be BC327 with BC337. They must handle peak currents of 300-400mA.The amplifier can be powered from a 9V battery or from a 12V power source. The circuit draws a current of about 170mA.
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | No.52Section side by side battery box | BT1 | 59MMX33MM | 1 |
| 2 | 470uF | C1 | CAP-TH_BD10.0-P5.00-D1.0-FD | 1 |
| 3 | 10uF | C2,C3 | CAP-TH_BD6.3-P2.50-D1.0-FD | 2 |
| 4 | XHB-2A | CN1 | CONN-TH_XHB-2A | 1 |
| 5 | 1N4148WSF-7 | D1,D2 | SOD-323_L1.8-W1.3-LS2.5-RD | 2 |
| 6 | 3.5mm Mono Audio Jack 3 pin (pj-316 17x7x8.2 mm) | J1 | 3.5MM_MONO_AUDIO_JACK_PJ-316 | 1 |
| 7 | BC327-40 | Q1 | TO-92-3_L4.9-W3.7-P1.27-L | 1 |
| 8 | BC337 | Q2 | TO-92-3_L4.9-W3.7-P1.27-L | 1 |
| 9 | BC547B | Q3 | TO-92-3_L4.9-W3.7-P1.27-L | 1 |
| 10 | 39k | R1 | R0603 | 1 |
| 11 | 82k | R2 | R0603 | 1 |
| 12 | 15k | R3 | R0603 | 1 |
| 13 | 2.2k | R4 | R0603 | 1 |
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