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The LA4440 is a popular audio power amplifier IC used in many small and medium-power sound systems. This guide explains how the LA4440 works, how to use its pins and application circuits, what problems may happen, and how to choose the right setup for reliable audio performance.
The TDA2005
| TDA7297 | PAM8403 | |||||
| Amplifier class | Class AB | Class AB | Class AB | Class AB | Class AB | Class D |
| Number of channels | 2 channels | 2 channels | 1 channel | 2 channels | 1 channel | 2 channels |
| Typical output power | 6W × 2 stereo or about 19W bridge | About 10W × 2 stereo or 20W bridge | About 14W to 18W mono | About 15W × 2 | About 20W to 25W mono | 3W × 2 |
| Common supply voltage | 12V to 13.2V | 12V to 14.4V | Single or dual supply, usually higher than 12V | 12V typical | Usually dual supply | 5V typical |
| Common speaker load | 2Ω to 8Ω stereo, 4Ω to 8Ω bridge | 2Ω to 4Ω common | 4Ω to 8Ω | 8Ω common | 4Ω to 8Ω | 4Ω to 8Ω |
| Bridge mode support | Yes | Yes | No, single channel only | Internally bridged stereo | No, single channel only | No typical external bridge use |
| Heat level | Medium to high | Medium to high | Medium to high | Medium to high | High at full power | Low |
| Heatsink needed | Yes | Yes | Yes | Yes, especially at high power | Yes | Usually not for small modules |
| Audio output type | Stereo or mono bridge | Stereo or mono bridge | Mono | Stereo BTL | Mono hi-fi | Stereo low-power |
| Best use | Car audio, radios, DIY stereo amplifiers | Car audio and compact speaker systems | Mono amplifier circuits | 12V stereo speakers and TV audio | Hi-fi mono amplifiers | USB, Bluetooth, and battery speakers |
| Main advantage | Simple 12V stereo or bridge amplifier | Stronger car-audio style output | Good for simple mono power amps | Good 12V stereo bridge output | Better audio quality and higher power | Very efficient and low heat |
| Main limitation | Needs good heatsink | Needs good cooling and layout | Needs separate ICs for stereo | Less flexible than LA4440 | Needs better power supply design | Lower output power |
Catalogue
FPGA / CPLD
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