Difference between revisions of "LM386"
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{{Pinout8|LM386|Gain|In -|In +|Ground|Out|V+|Bypass|Gain}} | {{Pinout8|LM386|Gain|In -|In +|Ground|Out|V+|Bypass|Gain}} | ||
| − | The '''LM386''', a.k.a. '''JRC386''', a.k.a. '''NJM386'' is a low-power amplifier chip. It is able to directly drive a small speaker, and is thus used in a number of battery-powered practice amp designs. | + | The '''LM386''', a.k.a. '''JRC386''', a.k.a. '''NJM386''' is a low-power amplifier chip. It is able to directly drive a small speaker, and is thus used in a number of battery-powered practice amp designs. |
==Models== | ==Models== | ||
Latest revision as of 14:47, 27 October 2011
| Gain | 1 | 8 | Gain |
| In - | 2 | 7 | Bypass |
| In + | 3 | 6 | V+ |
| Ground | 4 | 5 | Out |
The LM386, a.k.a. JRC386, a.k.a. NJM386 is a low-power amplifier chip. It is able to directly drive a small speaker, and is thus used in a number of battery-powered practice amp designs.
Models
| Chip Name | Supply Voltage | Min. Output Power | Typical Output Power |
| LM386N-1 | 4-12 V | 250 mW | 325 mW |
| LM386N-3 | 4-12 V | 500 mW | 700 mW |
| LM386N-4 | 5-18 V | 700 mW | 1000 mW |
Voltage reference trick
The LM386 has a self-centering output voltage. In other words, if there's no signal at it inputs, its output sits at half the supply voltage. Because of this, the 386 can be used as a source of a buffered bias voltage in stompbox circuits.
Used in
- Little Gem - portable amp
- Marshall MS-2 and MS-4 portable amps - use a SIL-packaged NJM386
- Ruby Amp - portable amp
- Smokey Amp - portable amp
- Uglyface - distortion/noisemaker
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