| Part Number(s) (NSID) |
Top View | Type | Pins | MSL Rating | Peak Reflow | RoHS Status |
CAD Symbols | Models | Package Marking Format |
|---|---|---|---|---|---|---|---|---|---|
| LM4937RL/NOPB |
MICRO SMDXT | 36 | 1 | 260 | Detail | Download | N/A |
XYTT I GJ3 |
|
| LM4937TL/NOPB |
MICRO SMD | 36 | 1 | 260 | Detail | Download | N/A |
XYTT I GI1 |
|
| LM4937TLX/NOPB |
MICRO SMD | 36 | 1 | 260 | Detail | Download | N/A |
XYTT I GI1 |
PDF
Description
The LM4937 is an integrated audio sub-system designed for mono voice, stereo music cell phones connecting to base band processors with mono differential analog voice paths. Operating on a 3.3V supply, it combines a mono speaker amplifier delivering 520mW into an 8Ω load, a stereo headphone amplifier delivering 36mW per channel into a 32Ω load, and a mono earpiece amplifier delivering 55mW into a 32Ω load. It integrates the audio amplifiers, volume control, mixer, and power management control all into a single package. In addition, the LM4937 routes and mixes the single-ended stereo and differential mono inputs into multiple distinct output modes. The LM4937 features an I
Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components.
| • | 18-bit stereo DAC |
| • | Multiple distinct output modes |
| • | Mono speaker amplifier |
| • | Stereo headphone amplifier |
| • | Mono earpiece amplifier |
| • | Differential mono analog input |
| • | Independent loudspeaker, headphone and mono earpiece volume controls |
| • | I |
| • | Ultra low shutdown current |
| • | Click and Pop Suppression circuit |
| 520mW (typ) | |
| 36mW (typ) | |
| 55mW (typ) | |
| 0.6µA (typ) | |
| 85dB (typ) |
| • | Cell Phones |
| • | PDAs |
Diagrams
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Block Diagram
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Typical Performance  source：ShenZhen henlito electronic co.,ltd.
web:www.henlito.com |
