LM4665ITL/NOPB
Active1.4-W, MONO, ANALOG INPUT CLASS-D AUDIO AMP WITH SELECTABLE GAIN
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LM4665ITL/NOPB
Active1.4-W, MONO, ANALOG INPUT CLASS-D AUDIO AMP WITH SELECTABLE GAIN
Technical Specifications
Parameters and characteristics for this part
| Specification | LM4665ITL/NOPB |
|---|---|
| Features | Short-Circuit Protection, Shutdown, Depop, Differential Inputs |
| Max Output Power x Channels @ Load | 1, 1.4 W |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Type | 1-Channel (Mono) |
| Package / Case | DSBGA, 9-WFBGA |
| Supplier Device Package | 9-DSBGA |
| Type | Class AB |
| Voltage - Supply [Max] | 3.8 V |
| Voltage - Supply [Min] | 2.7 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 3.92 | |
| 10 | $ 3.52 | |||
| 25 | $ 3.33 | |||
| 100 | $ 2.89 | |||
| Digi-Reel® | 1 | $ 3.92 | ||
| 10 | $ 3.52 | |||
| 25 | $ 3.33 | |||
| 100 | $ 2.89 | |||
| Tape & Reel (TR) | 250 | $ 0.62 | ||
| 500 | $ 0.55 | |||
| 750 | $ 0.60 | |||
| 1250 | $ 0.51 | |||
| 1750 | $ 0.58 | |||
| 2500 | $ 0.57 | |||
| 6250 | $ 0.55 | |||
| 12500 | $ 0.54 | |||
| Texas Instruments | SMALL T&R | 1 | $ 2.96 | |
| 100 | $ 2.60 | |||
| 250 | $ 1.82 | |||
| 1000 | $ 1.47 | |||
Description
General part information
LM4665 Series
The LM4665 is a fully integrated single-supply high efficiency switching audio amplifier. It features an innovative modulator that eliminates the LC output filter used with typical switching amplifiers. Eliminating the output filter reduces parts count, simplifies circuit design, and reduces board area. The LM4665 processes analog inputs with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators.
The LM4665 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 3V supply, it is capable of driving 8Ω transducer loads at a continuous average output of 400mW with less than 2%THD+N.
The LM4665 has high efficiency with an 8Ω transducer load compared to a typical Class AB amplifier. With a 3V supply, the IC's efficiency for a 100mW power level is 75%, reaching 80% at 400mW output power.
Documents
Technical documentation and resources
