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The LM388 is an audio amplifier designed for use in medium power consumer applications. The gain is internally set to 20 to keep the external part count low, but the addition of an external resistor and capacitor between pins 2 and 6 will increase the gain to any value up to 200. The inputs are ground referenced while the output is automatically biased to one-half the supply voltage.
LM388 Pinout
LM388 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | BYPASS | Bypass Pin |
| 2 | GAIN | Gain Pin |
| 3 | GND | Ground Pin |
| 4 | GND | Ground Pin |
| 5 | GND | Ground Pin |
| 6 | GAIN | Gain Pin |
| 7 | INV-IN | Inverting Input Pin |
| 8 | NON-INV-IN | Non-Inverting Input Pin |
| 9 | BOOTSTRAP | Bootstrap Pin |
| 10 | GND | Ground Pin |
| 11 | GND | Ground Pin |
| 12 | GND | Ground Pin |
| 13 | Vout | Output Voltage |
| 14 | Vs | Supply Voltage |
LM388 Key Features
- Minimum external parts
- Wide supply voltage range
- Excellent supply rejection
- Ground referenced input
- Self-centering output quiescent voltage
- Variable voltage gain
- Low distortion
- Fourteen pins dual-in-line package
- Low voltage operation, 4V
Application
- AM-FM radio amplifiers
- Portable tape player amplifiers
- Intercoms
- TV sound systems
- Lamp drivers
- Line drivers
- Ultrasonic drivers
- Small servo drivers
- Power converters
You can download this datasheet for LM388 1.5W Audio Power Amplifier – Datasheet from the link given below:
